gui_element_types.cpp

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#include <algorithm>
#include <cmath>
#include <stddef.h>
#include <stdint.h>
#include <unordered_map>
#include <variant>
#include <codecvt>
#include <locale>
#include "color.hpp"
#include "culture.hpp"
#include "cyto_any.hpp"
#include "dcon_generated.hpp"
#include "demographics.hpp"
#include "gui_element_base.hpp"
#include "gui_element_types.hpp"
#include "fonts.hpp"
#include "gui_graphics.hpp"
#include "nations.hpp"
#include "opengl_wrapper.hpp"
#include "text.hpp"
#include "sound.hpp"
#include "unit_tooltip.hpp"
#include "triggers.hpp"
#include "effects.hpp"
 
namespace ui {
 
inline message_result greater_result(message_result a, message_result b) {
    if(a == message_result::consumed || b == message_result::consumed)
        return message_result::consumed;
    if(a == message_result::seen || b == message_result::seen)
        return message_result::seen;
    return message_result::unseen;
}
 
mouse_probe container_base::impl_probe_mouse(sys::state& state, int32_t x, int32_t y, mouse_probe_type type) noexcept {
    for(auto& c : children) {
        if(c->is_visible()) {
            auto relative_location = child_relative_location(state, *this, *c);
            auto res = c->impl_probe_mouse(state, x - relative_location.x, y - relative_location.y, type);
            if(res.under_mouse)
                return res;
        }
    }
    return element_base::impl_probe_mouse(state, x, y, type);
}
 
message_result container_base::impl_on_key_down(sys::state& state, sys::virtual_key key, sys::key_modifiers mods) noexcept {
    message_result res = message_result::unseen;
    for(auto& c : children) {
        if(c->is_visible()) {
            res = greater_result(res, c->impl_on_key_down(state, key, mods));
            if(res == message_result::consumed)
                return message_result::consumed;
        }
    }
    return greater_result(res, element_base::impl_on_key_down(state, key, mods));
}
void container_base::impl_on_update(sys::state& state) noexcept {
    on_update(state);
    for(auto& c : children) {
        if(c->is_visible()) {
            c->impl_on_update(state);
        }
    }
}
void container_base::impl_on_reset_text(sys::state& state) noexcept {
    for(auto& c : children) {
        c->impl_on_reset_text(state);
    }
    on_reset_text(state);
}
message_result container_base::impl_set(sys::state& state, Cyto::Any& payload) noexcept {
    message_result res = message_result::unseen;
    for(auto& c : children) {
        res = greater_result(res, c->impl_set(state, payload));
    }
    return greater_result(res, set(state, payload));
}
 
void container_base::impl_render(sys::state& state, int32_t x, int32_t y) noexcept {
    element_base::impl_render(state, x, y);
 
    for(size_t i = children.size(); i-- > 0;) {
        if(children[i]->is_visible()) {
            auto relative_location = child_relative_location(state, *this, *(children[i]));
            children[i]->impl_render(state, x + relative_location.x, y + relative_location.y);
        }
    }
}
 
std::unique_ptr<element_base> container_base::remove_child(element_base* child) noexcept {
    if(auto it = std::find_if(children.begin(), children.end(), [child](std::unique_ptr<element_base>& p) { return p.get() == child; }); it != children.end()) {
        if(it + 1 != children.end())
            std::rotate(it, it + 1, children.end());
        auto temp = std::move(children.back());
        children.pop_back();
        temp->parent = nullptr;
        return temp;
    }
    return std::unique_ptr<element_base>{};
}
void container_base::move_child_to_front(element_base* child) noexcept {
    if(auto it = std::find_if(children.begin(), children.end(), [child](std::unique_ptr<element_base>& p) { return p.get() == child; }); it != children.end()) {
        if(it != children.begin())
            std::rotate(children.begin(), it, it + 1);
    }
}
void container_base::move_child_to_back(element_base* child) noexcept {
    if(auto it = std::find_if(children.begin(), children.end(), [child](std::unique_ptr<element_base>& p) { return p.get() == child; }); it != children.end()) {
        if(it + 1 != children.end())
            std::rotate(it, it + 1, children.end());
    }
}
void container_base::add_child_to_front(std::unique_ptr<element_base> child) noexcept {
    child->parent = this;
    children.emplace_back(std::move(child));
    if(children.size() > 1) {
        std::rotate(children.begin(), children.end() - 1, children.end());
    }
}
void container_base::add_child_to_back(std::unique_ptr<element_base> child) noexcept {
    child->parent = this;
    children.emplace_back(std::move(child));
}
element_base* container_base::get_child_by_name(sys::state const& state, std::string_view name) noexcept {
    if(auto it = std::find_if(children.begin(), children.end(), [&state, name](std::unique_ptr<element_base>& p) { return parsers::lowercase_str(state.to_string_view(p->base_data.name)) == parsers::lowercase_str(name); }); it != children.end()) {
        return it->get();
    }
    return nullptr;
}
element_base* container_base::get_child_by_index(sys::state const& state, int32_t index) noexcept {
    if(0 <= index && index < int32_t(children.size()))
        return children[index].get();
    return nullptr;
}
 
ogl::color_modification get_color_modification(bool is_under_mouse, bool is_disabled, bool is_interactable) {
    if(!is_under_mouse || !is_interactable) {
        if(is_disabled) {
            return ogl::color_modification::disabled;
        } else {
            return ogl::color_modification::none;
        }
    } else {
        if(is_disabled) {
            return ogl::color_modification::interactable_disabled;
        } else {
            return ogl::color_modification::interactable;
        }
    }
}
 
void image_element_base::on_create(sys::state& state) noexcept {
    element_base::on_create(state);
    if(base_data.get_element_type() == element_type::image) {
        frame = base_data.data.image.frame();
    }
}
 
void image_element_base::render(sys::state& state, int32_t x, int32_t y) noexcept {
    dcon::gfx_object_id gid;
    if(base_data.get_element_type() == element_type::image) {
        gid = base_data.data.image.gfx_object;
    } else if(base_data.get_element_type() == element_type::button) {
        gid = base_data.data.button.button_image;
    }
    // TODO: More elements defaults?
    if(gid) {
        auto& gfx_def = state.ui_defs.gfx[gid];
        if(gfx_def.primary_texture_handle) {
            if(gfx_def.get_object_type() == ui::object_type::bordered_rect) {
                ogl::render_bordered_rect(state, get_color_modification(this == state.ui_state.under_mouse, disabled, interactable),
                    gfx_def.type_dependent, float(x), float(y), float(base_data.size.x), float(base_data.size.y),
                    ogl::get_texture_handle(state, gfx_def.primary_texture_handle, gfx_def.is_partially_transparent()),
                    base_data.get_rotation(), gfx_def.is_vertically_flipped(),
                    get_horizontal_flip(state));
            } else if(gfx_def.number_of_frames > 1) {
                ogl::render_subsprite(state, get_color_modification(this == state.ui_state.under_mouse, disabled, interactable), frame,
                    gfx_def.number_of_frames, float(x), float(y), float(base_data.size.x), float(base_data.size.y),
                    ogl::get_texture_handle(state, gfx_def.primary_texture_handle, gfx_def.is_partially_transparent()),
                    base_data.get_rotation(), gfx_def.is_vertically_flipped(),
                    get_horizontal_flip(state));
            } else {
                ogl::render_textured_rect(state, get_color_modification(this == state.ui_state.under_mouse, disabled, interactable),
                    float(x), float(y), float(base_data.size.x), float(base_data.size.y),
                    ogl::get_texture_handle(state, gfx_def.primary_texture_handle, gfx_def.is_partially_transparent()),
                    base_data.get_rotation(), gfx_def.is_vertically_flipped(),
                    get_horizontal_flip(state));
            }
        }
    }
}
 
void tinted_image_element_base::render(sys::state& state, int32_t x, int32_t y) noexcept {
    dcon::gfx_object_id gid;
    if(base_data.get_element_type() == element_type::image) {
        gid = base_data.data.image.gfx_object;
    } else if(base_data.get_element_type() == element_type::button) {
        gid = base_data.data.button.button_image;
    }
    if(gid) {
        auto const& gfx_def = state.ui_defs.gfx[gid];
        if(gfx_def.primary_texture_handle) {
            if(gfx_def.number_of_frames > 1) {
                ogl::render_tinted_subsprite(state, frame,
                    gfx_def.number_of_frames, float(x), float(y), float(base_data.size.x), float(base_data.size.y),
                    sys::red_from_int(color), sys::green_from_int(color), sys::blue_from_int(color),
                    ogl::get_texture_handle(state, gfx_def.primary_texture_handle, gfx_def.is_partially_transparent()),
                    base_data.get_rotation(), gfx_def.is_vertically_flipped(),
                    state.world.locale_get_native_rtl(state.font_collection.get_current_locale()));
            } else {
                ogl::render_tinted_textured_rect(state, float(x), float(y), float(base_data.size.x), float(base_data.size.y),
                    sys::red_from_int(color), sys::green_from_int(color), sys::blue_from_int(color),
                    ogl::get_texture_handle(state, gfx_def.primary_texture_handle, gfx_def.is_partially_transparent()),
                    base_data.get_rotation(), gfx_def.is_vertically_flipped(),
                    state.world.locale_get_native_rtl(state.font_collection.get_current_locale()));
            }
        }
    }
}
 
void progress_bar::render(sys::state& state, int32_t x, int32_t y) noexcept {
    if(base_data.get_element_type() == element_type::image) {
        dcon::gfx_object_id gid = base_data.data.image.gfx_object;
        if(gid) {
            auto const& gfx_def = state.ui_defs.gfx[gid];
            auto secondary_texture_handle = dcon::texture_id(gfx_def.type_dependent - 1);
            if(gfx_def.primary_texture_handle) {
                ogl::render_progress_bar(state, get_color_modification(this == state.ui_state.under_mouse, disabled, interactable),
                    progress, float(x), float(y), float(base_data.size.x), float(base_data.size.y),
                    ogl::get_texture_handle(state, gfx_def.primary_texture_handle, gfx_def.is_partially_transparent()),
                    ogl::get_texture_handle(state, secondary_texture_handle, gfx_def.is_partially_transparent()),
                    base_data.get_rotation(), gfx_def.is_vertically_flipped(),
                    state.world.locale_get_native_rtl(state.font_collection.get_current_locale()));
            }
        }
    }
}
 
// From ui_f_shader.glsl
uint32_t internal_get_interactable_disabled_color(float r, float g, float b) {
    float amount = (r + g + b) / 4.f;
    return sys::pack_color(std::min(1.f, amount + 0.1f), std::min(1.f, amount + 0.1f), std::min(1.f, amount + 0.1f));
}
uint32_t internal_get_interactable_color(float r, float g, float b) {
    return sys::pack_color(std::min(1.f, r + 0.1f), std::min(1.f, g + 0.1f), std::min(1.f, b + 0.1f));
}
uint32_t internal_get_disabled_color(float r, float g, float b) {
    float amount = (r + g + b) / 4.f;
    return sys::pack_color(amount, amount, amount);
}
 
void render_text_chunk(
    sys::state& state,
    text::text_chunk t,
    float x,
    float baseline_y,
    uint16_t font_id,
    ogl::color3f text_color,
    ogl::color_modification cmod
) {
    auto font_size = float(text::size_from_font_id(font_id));
    auto font_index = text::font_index_from_font_id(state, font_id);
    auto& current_font = state.font_collection.get_font(state, font_index);
 
    if(std::holds_alternative<text::embedded_flag>(t.source)) {
        ogl::render_text_flag(
            state,
            std::get<text::embedded_flag>(t.source),
            x,
            baseline_y,
            font_size,
            current_font,
            cmod
        );
    } else if(std::holds_alternative<text::embedded_unit_icon>(t.source)) {
        ogl::render_text_unit_icon(
            state,
            std::get<text::embedded_unit_icon>(t.source),
            x,
            baseline_y,
            font_size,
            current_font,
            cmod
        );
    } else if(std::holds_alternative<text::embedded_icon>(t.source)) {
        ogl::render_text_icon(
            state,
            std::get<text::embedded_icon>(t.source),
            x,
            baseline_y,
            font_size,
            current_font,
            cmod
        );
    } else {
        ogl::render_text(
            state,
            t.unicodechars,
            cmod,
            x,
            baseline_y,
            text_color,
            font_id
        );
    }
}
 
void button_element_base::render(sys::state& state, int32_t x, int32_t y) noexcept {
    auto text_color = black_text ? ogl::color3f{ 0.0f, 0.0f, 0.0f } : ogl::color3f{ 1.0f, 1.0f, 1.0f };
    if(state.user_settings.color_blind_mode != sys::color_blind_mode::none) {
        /* On colour blind mode we tint things brigther to the user can see interactables better */
        dcon::gfx_object_id gid;
        if(base_data.get_element_type() == element_type::image) {
            gid = base_data.data.image.gfx_object;
        } else if(base_data.get_element_type() == element_type::button) {
            gid = base_data.data.button.button_image;
        }
        if(gid) {
            auto const& gfx_def = state.ui_defs.gfx[gid];
            if(gfx_def.primary_texture_handle) {
                float r = 1.f;
                float g = 1.f;
                float b = 1.f;
                ogl::color_modification cmod = get_color_modification(this == state.ui_state.under_mouse, disabled, interactable);
                auto tcolor = sys::pack_color(1.f, 1.f, 1.f);
                if(cmod == ogl::color_modification::interactable) {
                    if(state.user_settings.color_blind_mode == sys::color_blind_mode::tritan) {
                        tcolor = sys::pack_color(0.75f, 1.f, 0.75f);
                    } else {
                        tcolor = sys::pack_color(0.75f, 0.75f, 1.f);
                    }
                } else if(cmod == ogl::color_modification::interactable_disabled) {
                    tcolor = sys::pack_color(0.66f, 0.66f, 0.66f);
                    text_color = black_text ? ogl::color3f{ 1.f, 1.f, 1.f } : ogl::color3f{ 0.f, 0.f, 0.f };
                } else if(cmod == ogl::color_modification::disabled) {
                    tcolor = sys::pack_color(0.44f, 0.44f, 0.44f);
                    text_color = black_text ? ogl::color3f{ 1.f, 1.f, 1.f } : ogl::color3f{ 0.f, 0.f, 0.f };
                }
                if(gfx_def.number_of_frames > 1) {
                    ogl::render_tinted_subsprite(state, frame,
                        gfx_def.number_of_frames, float(x), float(y), float(base_data.size.x), float(base_data.size.y),
                        sys::red_from_int(tcolor), sys::green_from_int(tcolor), sys::blue_from_int(tcolor),
                        ogl::get_texture_handle(state, gfx_def.primary_texture_handle, gfx_def.is_partially_transparent()),
                        base_data.get_rotation(), gfx_def.is_vertically_flipped(),
                        state.world.locale_get_native_rtl(state.font_collection.get_current_locale()));
                } else {
                    ogl::render_tinted_textured_rect(state, float(x), float(y), float(base_data.size.x), float(base_data.size.y),
                        sys::red_from_int(tcolor), sys::green_from_int(tcolor), sys::blue_from_int(tcolor),
                        ogl::get_texture_handle(state, gfx_def.primary_texture_handle, gfx_def.is_partially_transparent()),
                        base_data.get_rotation(), gfx_def.is_vertically_flipped(),
                        state.world.locale_get_native_rtl(state.font_collection.get_current_locale()));
                }
            }
        }
    } else {
        image_element_base::render(state, x, y);
    }
 
    if(internal_layout.contents.empty())
        return;
 
    auto linesz = state.font_collection.line_height(state, base_data.data.button.font_handle);
    if(linesz == 0.f)
        return;
    auto ycentered = (base_data.size.y - linesz) / 2;
    auto cmod = get_color_modification(this == state.ui_state.under_mouse, disabled, interactable);
 
    for(auto& t : internal_layout.contents) {
        render_text_chunk(
            state,
            t,
            float(x) + t.x,
            float(y + int32_t(ycentered)),
            base_data.data.button.font_handle,
            text_color,
            cmod
        );
    }
}
 
void tinted_button_element_base::render(sys::state& state, int32_t x, int32_t y) noexcept {
    dcon::gfx_object_id gid;
    if(base_data.get_element_type() == element_type::image) {
        gid = base_data.data.image.gfx_object;
    } else if(base_data.get_element_type() == element_type::button) {
        gid = base_data.data.button.button_image;
    }
    if(gid) {
        auto const& gfx_def = state.ui_defs.gfx[gid];
        if(gfx_def.primary_texture_handle) {
            auto tcolor = color;
            float r = sys::red_from_int(color);
            float g = sys::green_from_int(color);
            float b = sys::blue_from_int(color);
            ogl::color_modification cmod = get_color_modification(this == state.ui_state.under_mouse, disabled, interactable);
            if(cmod == ogl::color_modification::interactable) {
                tcolor = internal_get_interactable_color(r, g, b);
            } else if(cmod == ogl::color_modification::interactable_disabled) {
                tcolor = internal_get_interactable_disabled_color(r, g, b);
            } else if(cmod == ogl::color_modification::disabled) {
                tcolor = internal_get_disabled_color(r, g, b);
            }
 
            if(gfx_def.number_of_frames > 1) {
                ogl::render_tinted_subsprite(state, frame,
                    gfx_def.number_of_frames, float(x), float(y), float(base_data.size.x), float(base_data.size.y),
                    sys::red_from_int(tcolor), sys::green_from_int(tcolor), sys::blue_from_int(tcolor),
                    ogl::get_texture_handle(state, gfx_def.primary_texture_handle, gfx_def.is_partially_transparent()),
                    base_data.get_rotation(), gfx_def.is_vertically_flipped(),
                    state.world.locale_get_native_rtl(state.font_collection.get_current_locale()));
            } else {
                ogl::render_tinted_textured_rect(state, float(x), float(y), float(base_data.size.x), float(base_data.size.y),
                    sys::red_from_int(tcolor), sys::green_from_int(tcolor), sys::blue_from_int(tcolor),
                    ogl::get_texture_handle(state, gfx_def.primary_texture_handle, gfx_def.is_partially_transparent()),
                    base_data.get_rotation(), gfx_def.is_vertically_flipped(),
                    state.world.locale_get_native_rtl(state.font_collection.get_current_locale()));
            }
        }
    }
 
    if(internal_layout.contents.empty())
        return;
 
    auto linesz = state.font_collection.line_height(state, base_data.data.button.font_handle);
    if(linesz == 0.f)
        return;
    auto ycentered = (base_data.size.y - linesz) / 2;
    auto cmod = get_color_modification(this == state.ui_state.under_mouse, disabled, interactable);
 
    for(auto& t : internal_layout.contents) {
        render_text_chunk(
            state,
            t,
            float(x) + t.x,
            float(y + int32_t(ycentered)),
            base_data.data.button.font_handle,
            black_text ? ogl::color3f{ 0.0f, 0.0f, 0.0f } : ogl::color3f{ 1.0f, 1.0f, 1.0f },
            cmod
        );
    }
}
 
ogl::color3f get_text_color(sys::state& state, text::text_color text_color) {
    if(state.user_settings.color_blind_mode == sys::color_blind_mode::achroma) {
        if(text_color == text::text_color::black
        || text_color == text::text_color::unspecified) {
            return ogl::color3f{ 0.f, 0.f, 0.f };
        } else if(text_color == text::text_color::white) {
            return ogl::color3f{ 1.f, 1.f, 1.f };
        } else if(text_color == text::text_color::dark_blue
        || text_color == text::text_color::dark_green
        || text_color == text::text_color::dark_red
        || text_color == text::text_color::brown) {
            return ogl::color3f{ 0.25f, 0.25f, 0.25f };
        } else if(text_color == text::text_color::light_blue
        || text_color == text::text_color::light_grey) {
            return ogl::color3f{ 0.75f, 0.75f, 0.75f };
        }
        return ogl::color3f{ 0.5f, 0.5f, 0.5f };
    }
 
    switch(text_color) {
    case text::text_color::black:
    case text::text_color::unspecified:
        return ogl::color3f{0.0f, 0.0f, 0.0f};
    case text::text_color::white:
        return ogl::color3f{1.0f, 1.0f, 1.0f};
    case text::text_color::red:
        if(state.user_settings.color_blind_mode == sys::color_blind_mode::deutan || state.user_settings.color_blind_mode == sys::color_blind_mode::protan) {
            return ogl::color3f{ 0.66f, 0.66f, 1.f }; //Remap to blue
        }
        return ogl::color3f{0.9f, 0.2f, 0.1f};
    case text::text_color::green:
        if(state.user_settings.color_blind_mode == sys::color_blind_mode::deutan || state.user_settings.color_blind_mode == sys::color_blind_mode::protan) {
            return ogl::color3f{ 0.95f, 0.95f, 0.2f }; //Remap to yellow
        }
        return ogl::color3f{0.2f, 0.95f, 0.2f};
    case text::text_color::yellow:
        return ogl::color3f{0.9f, 0.9f, 0.1f};
    case text::text_color::light_blue:
        if(state.user_settings.color_blind_mode == sys::color_blind_mode::deutan || state.user_settings.color_blind_mode == sys::color_blind_mode::protan) {
            return ogl::color3f{ 0.33f, 0.33f, 1.f }; //increase intensity
        } else if(state.user_settings.color_blind_mode == sys::color_blind_mode::tritan) {
            return ogl::color3f{ 0.5f, 1.f, 0.5f };
        }
        return ogl::color3f{0.5f, 0.5f, 1.0f};
    case text::text_color::dark_blue:
        if(state.user_settings.color_blind_mode == sys::color_blind_mode::deutan || state.user_settings.color_blind_mode == sys::color_blind_mode::protan) {
            return ogl::color3f{ 0.125f, 0.125f, 1.f }; //increase intensity
        } else if(state.user_settings.color_blind_mode == sys::color_blind_mode::tritan) {
            return ogl::color3f{ 0.2f, 0.8f, 0.2f };
        }
        return ogl::color3f{0.2f, 0.2f, 0.8f};
    case text::text_color::orange:
        return ogl::color3f{1.f, 0.7f, 0.1f};
    case text::text_color::lilac:
        return ogl::color3f{0.8f, 0.7f, 0.3f};
    case text::text_color::light_grey:
        return ogl::color3f{0.5f, 0.5f, 0.5f};
    case text::text_color::dark_red:
        if(state.user_settings.color_blind_mode == sys::color_blind_mode::deutan || state.user_settings.color_blind_mode == sys::color_blind_mode::protan) {
            return ogl::color3f{ 0.42f, 0.42f, 1.f }; //Remap to blue
        }
        return ogl::color3f{0.5f, 0.f, 0.f};
    case text::text_color::dark_green:
        if(state.user_settings.color_blind_mode == sys::color_blind_mode::deutan || state.user_settings.color_blind_mode == sys::color_blind_mode::protan) {
            return ogl::color3f{ 0.5f, 0.5f, 0.f }; //Remap to yellow
        }
        return ogl::color3f{0.f, 0.5f, 0.f};
    case text::text_color::gold:
        return ogl::color3f{232.0f / 255.0f, 210.0f / 255.0f, 124.0f / 255.0f};
    case text::text_color::brown:
        return ogl::color3f{ 150.0f / 255.0f, 75.0f / 255.0f, 0.f };
    default:
        return ogl::color3f{0.f, 0.f, 0.f};
    }
}
 
void button_element_base::set_button_text(sys::state& state, std::string const& new_text) {
    if(new_text != cached_text) {
        cached_text = new_text;
        internal_layout.contents.clear();
        internal_layout.number_of_lines = 0;
 
        text::single_line_layout sl{ internal_layout, text::layout_parameters{ 0, 0, static_cast<int16_t>(base_data.size.x), static_cast<int16_t>(base_data.size.y),
                    base_data.data.button.font_handle, 0, text::alignment::center, black_text ? text::text_color::black : text::text_color::white, true, true }, state.world.locale_get_native_rtl(state.font_collection.get_current_locale()) ? text::layout_base::rtl_status::rtl : text::layout_base::rtl_status::ltr };
        sl.add_text(state, cached_text);
    }
}
 
void button_element_base::format_text(sys::state& state) {
}
 
void button_element_base::on_reset_text(sys::state& state) noexcept {
    if(base_data.get_element_type() == element_type::button) {
        auto base_text_handle = base_data.data.button.txt;
        black_text = text::is_black_from_font_id(base_data.data.button.font_handle);
        if(base_text_handle) {
            cached_text = text::produce_simple_string(state, base_data.data.button.txt);
            internal_layout.contents.clear();
            internal_layout.number_of_lines = 0;
 
            text::single_line_layout sl{ internal_layout, text::layout_parameters{ 0, 0, static_cast<int16_t>(base_data.size.x), static_cast<int16_t>(base_data.size.y),
                        base_data.data.button.font_handle, 0, text::alignment::center, black_text ? text::text_color::black : text::text_color::white, true, true },
                state.world.locale_get_native_rtl(state.font_collection.get_current_locale()) ? text::layout_base::rtl_status::rtl : text::layout_base::rtl_status::ltr };
            sl.add_text(state, cached_text);
        }
    }
}
 
void button_element_base::on_create(sys::state& state) noexcept {
    on_reset_text(state);
}
 
message_result edit_box_element_base::on_lbutton_down(sys::state& state, int32_t x, int32_t y, sys::key_modifiers mods) noexcept {
    // Set edit control so we get on_text events
    state.ui_state.edit_target = this;
    sound::play_interface_sound(state, sound::get_click_sound(state), state.user_settings.interface_volume * state.user_settings.master_volume);
    return message_result::consumed;
}
 
void edit_box_element_base::on_text(sys::state& state, char32_t ch) noexcept {
    if(state.ui_state.edit_target == this && state.ui_state.edit_target->is_visible()) {
        if(ch >= 32 && ch != U'`' && ch != 127) {
            auto s = std::string(get_text(state));
            s += char(ch & 0xff);
            edit_index++;
            set_text(state, s);
            edit_box_update(state, s);
        } else if(ch == 0x16) { // this is ctrl+v on windows
#ifdef _WIN64
            std::wstring return_value;
            if(OpenClipboard(state.win_ptr->hwnd)) {
                HGLOBAL hClipboardData = GetClipboardData(CF_UNICODETEXT);
 
                if(hClipboardData != NULL) {
                    size_t byteSize = GlobalSize(hClipboardData);
                    void* memory = GlobalLock(hClipboardData);
                    if(memory != NULL) {
                        const wchar_t* text = reinterpret_cast<const wchar_t*>(memory);
                        return_value = std::wstring(text, text + byteSize / sizeof(wchar_t));
                        GlobalUnlock(hClipboardData);
                        if(return_value.length() > 0 && return_value.back() == 0) {
                            return_value.pop_back();
                        }
                    }
                }
                CloseClipboard();
            }
            if(return_value.size() > 0) {
                auto utf8_val = simple_fs::native_to_utf8(return_value);
                auto new_text = std::string(get_text(state)) + utf8_val;
                edit_index += int32_t(utf8_val.length());
                set_text(state, new_text);
                edit_box_update(state, new_text);
            }
#endif
        }
    }
}
 
message_result edit_box_element_base::on_key_down(sys::state& state, sys::virtual_key key, sys::key_modifiers mods) noexcept {
    if(state.ui_state.edit_target == this && state.ui_state.edit_target->is_visible()) {
        // Typable keys are handled by on_text callback, we only handle control keys
        auto s = std::string(get_text(state));
        switch(key) {
        case sys::virtual_key::RETURN:
            edit_box_enter(state, s);
            s.clear();
            set_text(state, s);
            edit_index = 0;
            break;
        case sys::virtual_key::ESCAPE:
            edit_box_esc(state);
            break;
        case sys::virtual_key::TAB:
            edit_box_tab(state, s);
            break;
        case sys::virtual_key::UP:
            edit_box_up(state);
            break;
        case sys::virtual_key::DOWN:
            edit_box_down(state);
            break;
        case sys::virtual_key::TILDA:
            edit_box_backtick(state);
            break;
        case sys::virtual_key::BACK_SLASH:
            edit_box_back_slash(state);
            break;
        case sys::virtual_key::LEFT:
            edit_index = std::max<int32_t>(edit_index - 1, 0);
            break;
        case sys::virtual_key::RIGHT:
            edit_index = std::min<int32_t>(edit_index + 1, int32_t(s.length()));
            break;
        case sys::virtual_key::DELETE_KEY:
            if(edit_index < int32_t(s.length())) {
                s.erase(edit_index, 1);
                set_text(state, s);
                edit_box_update(state, s);
            }
            break;
        case sys::virtual_key::BACK:
            if(mods == sys::key_modifiers::modifiers_ctrl && edit_index > 0 && edit_index <= int32_t(s.length())) {
                int32_t index = edit_index - 1;
                bool skip = false;
                while(index > 0 && (s.at(index) != ' ' || !skip)) {
                    if(s.at(index) != ' ')
                        skip = true;
                    --index;
                }
                s.erase(index, edit_index);
                set_text(state, s);
                edit_index = index;
                edit_box_update(state, s);
            } else if(edit_index > 0 && edit_index <= int32_t(s.length())) {
                s.erase(edit_index - 1, 1);
                set_text(state, s);
                edit_index--;
                edit_box_update(state, s);
            }
            break;
        default:
            break;
        }
        return message_result::consumed;
    }
    return message_result::unseen;
}
 
void edit_box_element_base::on_reset_text(sys::state& state) noexcept {
    if(base_data.get_element_type() == element_type::button) {
        simple_text_element_base::black_text = text::is_black_from_font_id(base_data.data.button.font_handle);
    } else if(base_data.get_element_type() == element_type::text) {
        simple_text_element_base::black_text = text::is_black_from_font_id(base_data.data.text.font_handle);
    }
}
 
void edit_box_element_base::on_create(sys::state& state) noexcept {
    if(base_data.get_element_type() == element_type::button) {
        //simple_text_element_base::text_offset = 0.0f;
    } else if(base_data.get_element_type() == element_type::text) {
        //simple_text_element_base::text_offset = base_data.data.text.border_size.x;
    }
    on_reset_text(state);
}
 
void edit_box_element_base::render(sys::state& state, int32_t x, int32_t y) noexcept {
    if(base_data.get_element_type() == element_type::text) {
        dcon::texture_id background_texture_id;
        if((base_data.data.text.flags & uint8_t(ui::text_background::tiles_dialog)) != 0) {
            background_texture_id = definitions::tiles_dialog;
        } else if((base_data.data.text.flags & uint8_t(ui::text_background::transparency)) != 0) {
            background_texture_id = definitions::transparency;
        } else if((base_data.data.text.flags & uint8_t(ui::text_background::small_tiles_dialog)) != 0) {
            background_texture_id = definitions::small_tiles_dialog;
        }
        // TODO: Partial transparency is ignored, might cause issues with "transparency"?
        // is-vertically-flipped is also ignored, also the border size **might** be
        // variable/stored somewhere, but I don't know where?
        if(bool(background_texture_id)) {
            ogl::render_bordered_rect(state, ogl::color_modification::none, 16.0f, float(x), float(y), float(base_data.size.x),
                float(base_data.size.y), ogl::get_texture_handle(state, background_texture_id, true), base_data.get_rotation(), false,
                state.world.locale_get_native_rtl(state.font_collection.get_current_locale()));
        }
    }
 
    // TODO: A better way to show the cursor!
    auto old_s = std::string(get_text(state));
    auto blink_s = std::string(get_text(state));
    blink_s.insert(size_t(edit_index), 1, '|');
    set_text(state, blink_s);
    simple_text_element_base::render(state, x, y);
    set_text(state, old_s);
}
 
void tool_tip::render(sys::state& state, int32_t x, int32_t y) noexcept {
    ogl::render_bordered_rect(state, ogl::color_modification::none, 16.0f, float(x), float(y), float(base_data.size.x),
        float(base_data.size.y), ogl::get_texture_handle(state, definitions::tiles_dialog, true), ui::rotation::upright, false, false);
    auto black_text = text::is_black_from_font_id(state.ui_state.tooltip_font);
    for(auto& t : internal_layout.contents) {
 
        auto& f = state.font_collection.get_font(state, text::font_index_from_font_id(state, state.ui_state.tooltip_font));
 
        render_text_chunk(
            state,
            t,
            float(x) + t.x,
            float(y + t.y),
            state.ui_state.tooltip_font,
            get_text_color(state, t.color),
            ogl::color_modification::none
        );
    }
}
 
void line_graph::set_data_points(sys::state& state, std::vector<float> const& datapoints) noexcept {
    assert(datapoints.size() == count);
    float min = *std::min_element(datapoints.begin(), datapoints.end());
    float max = *std::max_element(datapoints.begin(), datapoints.end());
    float y_height = max - min;
    std::vector<float> scaled_datapoints = std::vector<float>(count);
    if(y_height == 0.f) {
        for(size_t i = 0; i < count; i++) {
            scaled_datapoints[i] = .5f;
        }
    } else {
        for(size_t i = 0; i < count; i++) {
            scaled_datapoints[i] = (datapoints[i] - min) / y_height;
        }
    }
 
 
    lines.set_y(scaled_datapoints.data());
}
 
void line_graph::set_data_points(sys::state& state, std::vector<float> const& datapoints, float min, float max) noexcept {
    assert(datapoints.size() == count);
    float y_height = max - min;
    std::vector<float> scaled_datapoints = std::vector<float>(count);
    if(y_height == 0.f) {
        for(size_t i = 0; i < count; i++) {
            scaled_datapoints[i] = .5f;
        }
    } else {
        for(size_t i = 0; i < count; i++) {
            scaled_datapoints[i] = (datapoints[i] - min) / y_height;
        }
    }
 
 
    lines.set_y(scaled_datapoints.data());
}
 
void line_graph::on_create(sys::state& state) noexcept {
    element_base::on_create(state);
}
 
void line_graph::render(sys::state& state, int32_t x, int32_t y) noexcept {
    if(!is_coloured) {
        ogl::render_linegraph(state, ogl::color_modification::none, float(x), float(y), base_data.size.x, base_data.size.y, lines);
    } else {
        ogl::render_linegraph(state, ogl::color_modification::none, float(x), float(y), base_data.size.x, base_data.size.y, r, g, b, lines);
    }   
}
 
void simple_text_element_base::set_text(sys::state& state, std::string const& new_text) {
    if(base_data.get_element_type() == element_type::button) {
        if(new_text != cached_text) {
            cached_text = new_text;
            {
                internal_layout.contents.clear();
                internal_layout.number_of_lines = 0;
 
                auto al = text::to_text_alignment(base_data.data.button.get_alignment());
                text::single_line_layout sl{ internal_layout, text::layout_parameters{ 0, 0, static_cast<int16_t>(base_data.size.x - base_data.data.text.border_size.x * 2), static_cast<int16_t>(base_data.size.y),
                            base_data.data.button.font_handle, 0, al, black_text ? text::text_color::black : text::text_color::white, true, true },
                    state.world.locale_get_native_rtl(state.font_collection.get_current_locale()) ? text::layout_base::rtl_status::rtl : text::layout_base::rtl_status::ltr };
                sl.add_text(state, cached_text);
            }
            format_text(state);
        }
    } else if(base_data.get_element_type() == element_type::text) {
        if(new_text != cached_text) {
            cached_text = new_text;
            {
                internal_layout.contents.clear();
                internal_layout.number_of_lines = 0;
 
                auto al = text::to_text_alignment(base_data.data.text.get_alignment());
                text::single_line_layout sl{ internal_layout, text::layout_parameters{ 0, 0, static_cast<int16_t>(base_data.size.x - base_data.data.text.border_size.x * 2), static_cast<int16_t>(base_data.size.y),
                            base_data.data.text.font_handle, 0, al, black_text ? text::text_color::black : text::text_color::white, true, true },
                    state.world.locale_get_native_rtl(state.font_collection.get_current_locale()) ? text::layout_base::rtl_status::rtl : text::layout_base::rtl_status::ltr };
                sl.add_text(state, cached_text);
            }
            format_text(state);
        }
    }
}
 
void simple_text_element_base::format_text(sys::state& state) {
    float extent = 0.f;
    uint16_t font_handle = 0;
    if(base_data.get_element_type() == element_type::button)
        font_handle = base_data.data.button.font_handle;
    else if(base_data.get_element_type() == element_type::text)
        font_handle = base_data.data.text.font_handle;
 
    float x_limit = float(base_data.size.x);
    if(base_data.get_element_type() == element_type::text) {
        x_limit -= base_data.data.text.border_size.x;
    }
    auto& font = state.font_collection.get_font(state, text::font_index_from_font_id(state, font_handle));
    auto font_size = text::size_from_font_id(font_handle);
 
    for(size_t i = internal_layout.contents.size(); i-- > 0; ) {
        if(internal_layout.contents[i].x >= x_limit) {
            internal_layout.contents.resize(i);
        }
    }
}
 
void simple_text_element_base::on_reset_text(sys::state& state) noexcept {
    if(base_data.get_element_type() == element_type::button) {
        black_text = text::is_black_from_font_id(base_data.data.button.font_handle);
        cached_text = text::produce_simple_string(state, base_data.data.button.txt);
        {
            internal_layout.contents.clear();
            internal_layout.number_of_lines = 0;
 
            auto al = text::to_text_alignment(base_data.data.button.get_alignment());
            text::single_line_layout sl{ internal_layout, text::layout_parameters{ 0, 0, static_cast<int16_t>(base_data.size.x - base_data.data.text.border_size.x * 2), static_cast<int16_t>(base_data.size.y),
                        base_data.data.button.font_handle, 0, al, black_text ? text::text_color::black : text::text_color::white, true, true },
                state.world.locale_get_native_rtl(state.font_collection.get_current_locale()) ? text::layout_base::rtl_status::rtl : text::layout_base::rtl_status::ltr };
            sl.add_text(state, cached_text);
        }
        format_text(state);
    } else if(base_data.get_element_type() == element_type::text) {
        black_text = text::is_black_from_font_id(base_data.data.text.font_handle);
        cached_text = text::produce_simple_string(state, base_data.data.text.txt);
        {
            internal_layout.contents.clear();
            internal_layout.number_of_lines = 0;
 
            auto al = text::to_text_alignment(base_data.data.text.get_alignment());
            text::single_line_layout sl{ internal_layout, text::layout_parameters{ 0, 0, static_cast<int16_t>(base_data.size.x), static_cast<int16_t>(base_data.size.y),
                        base_data.data.text.font_handle, 0, al, black_text ? text::text_color::black : text::text_color::white, true, true },
                state.world.locale_get_native_rtl(state.font_collection.get_current_locale()) ? text::layout_base::rtl_status::rtl : text::layout_base::rtl_status::ltr };
            sl.add_text(state, cached_text);
        }
        format_text(state);
    }
}
void simple_text_element_base::on_create(sys::state& state) noexcept {
    on_reset_text(state);
}
void simple_text_element_base::render(sys::state& state, int32_t x, int32_t y) noexcept {
    auto tc = get_text_color(state, black_text ? text::text_color::black : text::text_color::white);
 
    if(base_data.get_element_type() == element_type::button) {
        auto linesz = state.font_collection.line_height(state, base_data.data.button.font_handle);
        if(linesz == 0.f)
            return;
        auto ycentered = (base_data.size.y - linesz) / 2;
 
        for(auto& t : internal_layout.contents) {
            render_text_chunk(
                state,
                t,
                float(x) + t.x,
                float(y + int32_t(ycentered)),
                base_data.data.button.font_handle,
                get_text_color(state, t.color),
                ogl::color_modification::none
            );
        }
    } else {
        for(auto& t : internal_layout.contents) {
            render_text_chunk(
                state,
                t,
                float(x + base_data.data.text.border_size.x) + t.x,
                float(y + base_data.data.text.border_size.y),
                base_data.data.button.font_handle,
                get_text_color(state, t.color),
                ogl::color_modification::none
            );
        }
    }
}
 
void simple_body_text::on_create(sys::state& state) noexcept {
    if(base_data.get_element_type() == element_type::button) {
        set_text(state, text::produce_simple_string(state, base_data.data.button.txt));
        black_text = text::is_black_from_font_id(base_data.data.button.font_handle);
    } else if(base_data.get_element_type() == element_type::text) {
        set_text(state, text::produce_simple_string(state, base_data.data.text.txt));
        black_text = text::is_black_from_font_id(base_data.data.text.font_handle);
    }
}
void simple_body_text::set_text(sys::state& state, std::string const& new_text) {
    auto old_handle = base_data.data.text_common.font_handle;
    base_data.data.text_common.font_handle &= ~(0x01 << 7);
    auto old_value = base_data.data.text_common.font_handle & 0x3F;
    base_data.data.text_common.font_handle &= ~(0x003F);
    base_data.data.text_common.font_handle |= (old_value - 2);
 
    simple_text_element_base::set_text(state, new_text);
    base_data.data.text_common.font_handle = old_handle;
}
void simple_body_text::render(sys::state& state, int32_t x, int32_t y) noexcept {
    auto old_handle = base_data.data.text_common.font_handle;
    base_data.data.text_common.font_handle &= ~(0x01 << 7);
    auto old_value = base_data.data.text_common.font_handle & 0x3F;
    base_data.data.text_common.font_handle &= ~(0x003F);
    base_data.data.text_common.font_handle |= (old_value - 2);
 
    simple_text_element_base::render(state, x, y);
    base_data.data.text_common.font_handle = old_handle;
}
void simple_body_text::on_reset_text(sys::state& state) noexcept {
    auto old_handle = base_data.data.text_common.font_handle;
    base_data.data.text_common.font_handle &= ~(0x01 << 7);
    auto old_value = base_data.data.text_common.font_handle & 0x3F;
    base_data.data.text_common.font_handle &= ~(0x003F);
    base_data.data.text_common.font_handle |= (old_value - 2);
 
    simple_text_element_base::on_reset_text(state);
    base_data.data.text_common.font_handle = old_handle;
}
 
void color_text_element::render(sys::state& state, int32_t x, int32_t y) noexcept {
    auto tc = get_text_color(state, color);
 
    if(base_data.get_element_type() == element_type::button) {
        auto linesz = state.font_collection.line_height(state, base_data.data.button.font_handle);
        if(linesz == 0.f)
            return;
        auto ycentered = (base_data.size.y - linesz) / 2;
 
        for(auto& t : internal_layout.contents) {
            render_text_chunk(
                state,
                t,
                float(x) + t.x,
                float(y + int32_t(ycentered)),
                base_data.data.button.font_handle,
                tc,
                ogl::color_modification::none
            );
        }
    } else {
        for(auto& t : internal_layout.contents) {
            render_text_chunk(
                state,
                t,
                float(x + base_data.data.text.border_size.x) + t.x,
                float(y + base_data.data.text.border_size.y),
                base_data.data.button.font_handle,
                tc,
                ogl::color_modification::none
            );
        }
    }
}
 
void multiline_text_element_base::on_create(sys::state& state) noexcept {
    if(base_data.get_element_type() == element_type::text) {
        black_text = text::is_black_from_font_id(base_data.data.text.font_handle);
        line_height = state.font_collection.line_height(state, base_data.data.text.font_handle);
        visible_lines = base_data.size.y / std::max<int32_t>(int32_t(line_height), 1);
    }
}
 
void multiline_text_element_base::on_reset_text(sys::state& state) noexcept {
 
}
 
void multiline_text_element_base::render(sys::state& state, int32_t x, int32_t y) noexcept {
    if(base_data.get_element_type() == element_type::text) {
        for(auto& t : internal_layout.contents) {
            float line_offset = t.y - line_height * float(current_line);
 
            if(0 <= line_offset && line_offset < base_data.size.y) {
                render_text_chunk(
                    state,
                    t,
                    float(x) + t.x,
                    float(y + line_offset),
                    base_data.data.text.font_handle,
                    get_text_color(state, t.color),
                    ogl::color_modification::none
                );
            }
        }
    }
}
 
message_result multiline_text_element_base::on_lbutton_down(sys::state& state, int32_t x, int32_t y, sys::key_modifiers mods) noexcept {
    auto const* chunk = internal_layout.get_chunk_from_position(x, y + int32_t(line_height * float(current_line)));
    if(chunk != nullptr) {
        if(std::holds_alternative<dcon::nation_id>(chunk->source)) {
            sound::play_interface_sound(state, sound::get_click_sound(state), state.user_settings.interface_volume * state.user_settings.master_volume);
            state.open_diplomacy(std::get<dcon::nation_id>(chunk->source));
            auto cap = state.world.nation_get_capital(std::get<dcon::nation_id>(chunk->source));
            if(cap) {
                auto map_pos = state.world.province_get_mid_point(cap);
                map_pos.x /= float(state.map_state.map_data.size_x);
                map_pos.y /= float(state.map_state.map_data.size_y);
                map_pos.y = 1.0f - map_pos.y;
                state.map_state.set_pos(map_pos);
            }
        } else if(std::holds_alternative<dcon::province_id>(chunk->source)) {
            auto prov = std::get<dcon::province_id>(chunk->source);
            if(prov && prov.value < state.province_definitions.first_sea_province.value) {
                sound::play_interface_sound(state, sound::get_click_sound(state), state.user_settings.interface_volume * state.user_settings.master_volume);
                state.map_state.set_selected_province(prov);
                static_cast<ui::province_view_window*>(state.ui_state.province_window)->set_active_province(state, prov);
                if(state.map_state.get_zoom() < map::zoom_very_close)
                    state.map_state.zoom = map::zoom_very_close;
                state.map_state.center_map_on_province(state, prov);
            }
        } else if(std::holds_alternative<dcon::state_instance_id>(chunk->source)) {
            auto s = std::get<dcon::state_instance_id>(chunk->source);
            auto prov = state.world.state_instance_get_capital(s);
            if(prov && prov.id.value < state.province_definitions.first_sea_province.value) {
                sound::play_interface_sound(state, sound::get_click_sound(state), state.user_settings.interface_volume * state.user_settings.master_volume);
                state.map_state.set_selected_province(prov);
                static_cast<ui::province_view_window*>(state.ui_state.province_window)->set_active_province(state, prov);
                if(state.map_state.get_zoom() < map::zoom_very_close)
                    state.map_state.zoom = map::zoom_very_close;
                state.map_state.center_map_on_province(state, prov);
            }
        } else if(std::holds_alternative<dcon::national_identity_id>(chunk->source)) {
            auto id = std::get<dcon::national_identity_id>(chunk->source);
            auto nat = state.world.national_identity_get_nation_from_identity_holder(id);
            if(nat) {
                sound::play_interface_sound(state, sound::get_click_sound(state), state.user_settings.interface_volume * state.user_settings.master_volume);
                state.open_diplomacy(nat);
                auto cap = state.world.nation_get_capital(nat);
                if(cap) {
                    auto map_pos = state.world.province_get_mid_point(cap);
                    map_pos.x /= float(state.map_state.map_data.size_x);
                    map_pos.y /= float(state.map_state.map_data.size_y);
                    map_pos.y = 1.0f - map_pos.y;
                    state.map_state.set_pos(map_pos);
                }
            }
        } else if(std::holds_alternative<dcon::state_definition_id>(chunk->source)) {
            auto s = std::get<dcon::state_definition_id>(chunk->source);
            auto prov_rng = state.world.state_definition_get_abstract_state_membership(s);
            dcon::province_id prov = prov_rng.begin() != prov_rng.end() ? (*prov_rng.begin()).get_province().id : dcon::province_id{ };
            if(prov && prov.value < state.province_definitions.first_sea_province.value) {
                sound::play_interface_sound(state, sound::get_click_sound(state), state.user_settings.interface_volume * state.user_settings.master_volume);
                state.map_state.set_selected_province(prov);
                static_cast<ui::province_view_window*>(state.ui_state.province_window)->set_active_province(state, prov);
                if(state.map_state.get_zoom() < map::zoom_very_close)
                    state.map_state.zoom = map::zoom_very_close;
                state.map_state.center_map_on_province(state, prov);
            }
        }
        return message_result::consumed;
    }
    return message_result::unseen;
}
 
message_result multiline_text_element_base::on_rbutton_down(sys::state& state, int32_t x, int32_t y, sys::key_modifiers mods) noexcept {
    return message_result::consumed;
}
 
message_result multiline_text_element_base::test_mouse(sys::state& state, int32_t x, int32_t y, mouse_probe_type type) noexcept {
    if(line_height == 0.f)
        return message_result::unseen;
    switch(type) {
    case mouse_probe_type::click:
    {
        auto chunk = internal_layout.get_chunk_from_position(x, y + int32_t(line_height * float(current_line)));
        if(!chunk)
            return message_result::unseen;
        if(std::holds_alternative<dcon::nation_id>(chunk->source)
            || std::holds_alternative<dcon::province_id>(chunk->source)
            || std::holds_alternative<dcon::state_instance_id>(chunk->source)
            || std::holds_alternative<dcon::national_identity_id>(chunk->source)
            || std::holds_alternative<dcon::state_definition_id>(chunk->source)) {
 
            return message_result::consumed;
        }
        return message_result::unseen;
    }
    case mouse_probe_type::tooltip:
        if(has_tooltip(state) != tooltip_behavior::no_tooltip)
            return message_result::consumed;
        return message_result::unseen;
    case mouse_probe_type::scroll:
        return message_result::unseen;
    }
    return message_result::unseen;
}
 
void multiline_button_element_base::on_reset_text(sys::state& state) noexcept {
    button_element_base::on_reset_text(state);
    if(base_data.get_element_type() == element_type::button) {
        black_text = text::is_black_from_font_id(base_data.data.button.font_handle);
        line_height = state.font_collection.line_height(state, base_data.data.button.font_handle);
        if(line_height == 0.f)
            return;
        visible_lines = base_data.size.y / int32_t(line_height);
    }
}
 
void multiline_button_element_base::on_create(sys::state& state) noexcept {
    on_reset_text(state);
}
 
void multiline_button_element_base::render(sys::state& state, int32_t x, int32_t y) noexcept {
    button_element_base::render(state, x, y);
    if(internal_layout.contents.empty())
        return;
 
    if(base_data.get_element_type() == element_type::button) {
        if(line_height == 0.f)
            return;
        for(auto& t : internal_layout.contents) {
            float line_offset = t.y - line_height * float(current_line);
            if(0 <= line_offset && line_offset < base_data.size.y) {
                render_text_chunk(
                    state,
                    t,
                    float(x) + t.x,
                    float(y + line_offset),
                    base_data.data.button.font_handle,
                    get_text_color(state, t.color),
                    ogl::color_modification::none
                );
            }
        }
    }
}
 
void make_size_from_graphics(sys::state& state, ui::element_data& dat) {
    if(dat.size.x == 0 || dat.size.y == 0) {
        dcon::gfx_object_id gfx_handle;
        float scale = 1.0f;
        if(dat.get_element_type() == ui::element_type::image) {
            gfx_handle = dat.data.image.gfx_object;
            scale = dat.data.image.scale;
        } else if(dat.get_element_type() == ui::element_type::button) {
            gfx_handle = dat.data.button.button_image;
        }
        if(gfx_handle) {
            auto const& gfx_def = state.ui_defs.gfx[gfx_handle];
            if(gfx_def.size.x != 0) {
                dat.size = gfx_def.size;
            } else {
                auto tex_handle = gfx_def.primary_texture_handle;
                if(tex_handle) {
                    ogl::get_texture_handle(state, tex_handle, gfx_def.is_partially_transparent());
                    dat.size.y = int16_t(state.open_gl.asset_textures[tex_handle].size_y);
                    dat.size.x = int16_t(state.open_gl.asset_textures[tex_handle].size_x / gfx_def.number_of_frames);
                }
            }
            if(scale != 1.0f) {
                dat.size.x = int16_t(dat.size.x * dat.data.image.scale);
                dat.size.y = int16_t(dat.size.y * dat.data.image.scale);
            }
        }
    }
}
 
std::unique_ptr<element_base> make_element(sys::state& state, std::string_view name) {
    auto it = state.ui_state.defs_by_name.find(state.lookup_key(name));
    if(it != state.ui_state.defs_by_name.end()) {
        if(it->second.generator) {
            auto res = it->second.generator(state, it->second.definition);
            if(res) {
                std::memcpy(&(res->base_data), &(state.ui_defs.gui[it->second.definition]), sizeof(ui::element_data));
                make_size_from_graphics(state, res->base_data);
                res->on_create(state);
                return res;
            }
        }
        return make_element_immediate(state, it->second.definition);
    }
    return std::unique_ptr<element_base>{};
}
 
state::state() {
    units_root = std::make_unique<container_base>();
    rgos_root = std::make_unique<container_base>();
    province_details_root = std::make_unique<container_base>();
    root = std::make_unique<container_base>();
    military_root = std::make_unique<container_base>();
    army_group_selector_root = std::make_unique<container_base>();
    tooltip = std::make_unique<tool_tip>();
    tooltip->flags |= element_base::is_invisible_mask;
}
 
state::~state() = default;
 
void window_element_base::on_create(sys::state& state) noexcept {
    if(base_data.get_element_type() == element_type::window) {
        auto first_child = base_data.data.window.first_child;
        auto num_children = base_data.data.window.num_children;
        for(auto ex : state.ui_defs.extensions) {
            if(ex.window == base_data.name) {
                auto ch_res = make_child(state, parsers::lowercase_str(state.to_string_view(state.ui_defs.gui[ex.child].name)), ex.child);
                if(!ch_res) {
                    ch_res = ui::make_element_immediate(state, ex.child);
                }
                if(ch_res) {
                    this->add_child_to_back(std::move(ch_res));
                }
            }
        }
        for(uint32_t i = num_children; i-- > 0;) {
            auto child_tag = dcon::gui_def_id(dcon::gui_def_id::value_base_t(i + first_child.index()));
            auto ch_res = make_child(state, parsers::lowercase_str(state.to_string_view(state.ui_defs.gui[child_tag].name)), child_tag);
            if(!ch_res) {
                ch_res = ui::make_element_immediate(state, child_tag);
            }
            if(ch_res) {
                this->add_child_to_back(std::move(ch_res));
            }
        }
    }
}
 
void window_element_base::on_drag(sys::state& state, int32_t oldx, int32_t oldy, int32_t x, int32_t y,
        sys::key_modifiers mods) noexcept {
    auto location_abs = get_absolute_location(state, *this);
    if(location_abs.x <= oldx && oldx < base_data.size.x + location_abs.x && location_abs.y <= oldy &&
            oldy < base_data.size.y + location_abs.y) {
        xy_pair new_abs_pos = location_abs;
        new_abs_pos.x += int16_t(x - oldx);
        new_abs_pos.y += int16_t(y - oldy);
 
        if(ui_width(state) > base_data.size.x)
            new_abs_pos.x = int16_t(std::clamp(int32_t(new_abs_pos.x), 0, ui_width(state) - base_data.size.x));
        if(ui_height(state) > base_data.size.y)
            new_abs_pos.y = int16_t(std::clamp(int32_t(new_abs_pos.y), 0, ui_height(state) - base_data.size.y));
 
        if(state.world.locale_get_native_rtl(state.font_collection.get_current_locale())) {
            base_data.position.x -= int16_t(new_abs_pos.x - location_abs.x);
        } else {
            base_data.position.x += int16_t(new_abs_pos.x - location_abs.x);
        }
        base_data.position.y += int16_t(new_abs_pos.y - location_abs.y);
    }
}
 
template<class T>
void piechart<T>::render(sys::state& state, int32_t x, int32_t y) noexcept {
    if(distribution.size() > 0)
        ogl::render_piechart(state, ogl::color_modification::none, float(x), float(y), float(base_data.size.x), data_texture);
}
 
template<class T>
void piechart<T>::on_create(sys::state& state) noexcept {
    base_data.position.x -= base_data.size.x;
    radius = float(base_data.size.x);
    base_data.size.x *= 2;
    base_data.size.y *= 2;
}
 
template<class T>
void piechart<T>::update_chart(sys::state& state) {
    std::sort(distribution.begin(), distribution.end(), [](auto const& a, auto const& b) { return a.value > b.value; });
    float total = 0.0f;
    for(auto& e : distribution) {
        total += e.value;
    }
    int32_t int_total = 0;
 
    if(total != 0.0f) {
        for(auto& e : distribution) {
            auto ivalue = int32_t(e.value * float(resolution) / total);
            e.slices = uint8_t(ivalue);
            e.value /= total;
            int_total += ivalue;
        }
    } else {
        distribution.clear();
    }
 
    if(int_total < resolution && distribution.size() > 0) {
        auto rem = resolution - int_total;
        while(rem > 0) {
            for(auto& e : distribution) {
                e.slices += uint8_t(1);
                rem -= 1;
                if(rem == 0)
                    break;
            }
        }
    } else if(int_total > resolution) {
        assert(false);
    }
 
    size_t i = 0;
    for(auto& e : distribution) {
        uint32_t color = ogl::get_ui_color<T>(state, e.key);
        auto slice_count = size_t(e.slices);
 
        for(size_t j = 0; j < slice_count; j++) {
            data_texture.data[(i + j) * channels] = uint8_t(color & 0xFF);
            data_texture.data[(i + j) * channels + 1] = uint8_t(color >> 8 & 0xFF);
            data_texture.data[(i + j) * channels + 2] = uint8_t(color >> 16 & 0xFF);
        }
 
        i += slice_count;
    }
    for(; i < resolution; i++) {
        data_texture.data[i * channels] = uint8_t(0);
        data_texture.data[i * channels + 1] = uint8_t(0);
        data_texture.data[i * channels + 2] = uint8_t(0);
    }
 
    data_texture.data_updated = true;
}
 
template<class T>
void piechart<T>::update_tooltip(sys::state& state, int32_t x, int32_t y, text::columnar_layout& contents) noexcept {
    float const PI = 3.141592653589793238463f;
    float dx = float(x) - radius;
    float dy = float(y) - radius;
    size_t index = 0;
    if(dx != 0.0f || dy != 0.0f) {
        float dist = std::sqrt(dx * dx + dy * dy);
        float angle = std::acos(-dx / dist);
        if(dy > 0.f) {
            angle = PI + (PI - angle);
        }
        index = size_t(angle / (2.f * PI) * float(resolution));
    }
    for(auto const& e : distribution) {
        if(index < size_t(e.slices)) {
            populate_tooltip(state, e.key, e.value, contents);
            return;
        }
        index -= size_t(e.slices);
    }
}
 
template<class T>
void piechart<T>::populate_tooltip(sys::state& state, T t, float percentage, text::columnar_layout& contents) noexcept {
    auto fat_t = dcon::fatten(state.world, t);
    auto box = text::open_layout_box(contents, 0);
    if constexpr(!std::is_same_v<dcon::nation_id, T>)
        text::add_to_layout_box(state, contents, box, fat_t.get_name(), text::substitution_map{});
    else
        text::add_to_layout_box(state, contents, box, text::get_name(state, t), text::substitution_map{});
    text::add_to_layout_box(state, contents, box, std::string(":"), text::text_color::white);
    text::add_space_to_layout_box(state, contents, box);
    text::add_to_layout_box(state, contents, box, text::format_percentage(percentage, 1), text::text_color::white);
    text::close_layout_box(contents, box);
}
 
template<class SrcT, class DemoT>
void demographic_piechart<SrcT, DemoT>::on_update(sys::state& state) noexcept {
    this->distribution.clear();
 
    Cyto::Any obj_id_payload = SrcT{};
    size_t i = 0;
    if(this->parent) {
        this->parent->impl_get(state, obj_id_payload);
        float total_pops = 0.f;
 
        for_each_demo(state, [&](DemoT demo_id) {
            float volume = 0.f;
            if(obj_id_payload.holds_type<dcon::province_id>()) {
                auto demo_key = demographics::to_key(state, demo_id);
                auto prov_id = any_cast<dcon::province_id>(obj_id_payload);
                volume = state.world.province_get_demographics(prov_id, demo_key);
            } else if(obj_id_payload.holds_type<dcon::nation_id>()) {
                auto demo_key = demographics::to_key(state, demo_id);
                auto nat_id = any_cast<dcon::nation_id>(obj_id_payload);
                volume = state.world.nation_get_demographics(nat_id, demo_key);
            }
 
            if constexpr(std::is_same_v<SrcT, dcon::pop_id>) {
                if(obj_id_payload.holds_type<dcon::pop_id>()) {
                    auto demo_key = pop_demographics::to_key(state, demo_id);
                    auto pop_id = any_cast<dcon::pop_id>(obj_id_payload);
                    volume = pop_demographics::get_demo(state, pop_id, demo_key);
                }
            }
            if(volume > 0)
                this->distribution.emplace_back(demo_id, volume);
        });
    }
 
    this->update_chart(state);
}
 
void autoscaling_scrollbar::on_create(sys::state& state) noexcept {
    base_data.data.scrollbar.flags &= ~ui::scrollbar_data::step_size_mask;
    scrollbar::on_create(state);
}
 
void autoscaling_scrollbar::scale_to_parent() {
    base_data.size.y = parent->base_data.size.y;
    base_data.data.scrollbar.border_size = base_data.size;
    base_data.position.x = parent->base_data.size.x; // base_data.size.x / 3;
 
    left->base_data.position.y = parent->base_data.size.y - left->base_data.size.y;
    right->base_data.position.y = 0;
    track->base_data.size.y = parent->base_data.size.y - 2 * right->base_data.size.y;
    track->base_data.position.y = right->base_data.size.y;
    track->base_data.position.x = 5;
    slider->base_data.position.x = 0;
    settings.track_size = track->base_data.size.y;
 
    left->step_size = -settings.scaling_factor;
    right->step_size = -settings.scaling_factor;
}
 
void multiline_text_scrollbar::on_value_change(sys::state& state, int32_t v) noexcept {
    Cyto::Any payload = multiline_text_scroll_event{int32_t(scaled_value())};
    impl_get(state, payload);
}
 
void scrollable_text::on_create(sys::state& state) noexcept {
    auto res = std::make_unique<multiline_text_element_base>();
    std::memcpy(&(res->base_data), &(base_data), sizeof(ui::element_data));
    make_size_from_graphics(state, res->base_data);
    res->base_data.position.x = 0;
    res->base_data.position.y = 0;
    res->on_create(state);
    delegate = res.get();
    delegate->base_data.flags &= ~uint8_t(ui::element_data::orientation_mask);
    add_child_to_front(std::move(res));
 
    auto ptr = make_element_by_type<multiline_text_scrollbar>(state, "standardlistbox_slider");
    text_scrollbar = static_cast<multiline_text_scrollbar*>(ptr.get());
    add_child_to_front(std::move(ptr));
    text_scrollbar->scale_to_parent();
}
 
void scrollable_text::calibrate_scrollbar(sys::state& state) noexcept {
    if(delegate->internal_layout.number_of_lines > delegate->visible_lines) {
        text_scrollbar->set_visible(state, true);
        text_scrollbar->change_settings(state,
                mutable_scrollbar_settings{0, delegate->internal_layout.number_of_lines - delegate->visible_lines, 0, 0, false});
    } else {
        text_scrollbar->set_visible(state, false);
        delegate->current_line = 0;
    }
}
 
message_result scrollable_text::on_scroll(sys::state& state, int32_t x, int32_t y, float amount, sys::key_modifiers mods) noexcept {
    if(delegate->internal_layout.number_of_lines > delegate->visible_lines) {
        text_scrollbar->update_scaled_value(state, text_scrollbar->scaled_value() + std::clamp(-amount, -1.f, 1.f));
        delegate->current_line = int32_t(text_scrollbar->scaled_value());
        return message_result::consumed;
    }
    return message_result::unseen;
}
 
message_result scrollable_text::get(sys::state& state, Cyto::Any& payload) noexcept {
    if(payload.holds_type<multiline_text_scroll_event>()) {
        auto event = any_cast<multiline_text_scroll_event>(payload);
        delegate->current_line = event.new_value;
        return message_result::consumed;
    } else {
        return message_result::unseen;
    }
}
 
template<class RowWinT, class RowConT>
void standard_listbox_scrollbar<RowWinT, RowConT>::on_value_change(sys::state& state, int32_t v) noexcept {
    static_cast<listbox_element_base<RowWinT, RowConT>*>(parent)->update(state);
}
 
void listbox2_scrollbar::on_value_change(sys::state& state, int32_t v) noexcept {
    send(state, parent, listbox2_scroll_event{ });
}
 
message_result listbox2_row_element::get(sys::state& state, Cyto::Any& payload) noexcept {
    send(state, parent, listbox2_row_view{ this });
    return message_result::unseen;
}
 
 
template<class RowConT>
message_result listbox_row_element_base<RowConT>::get(sys::state& state, Cyto::Any& payload) noexcept {
    if(payload.holds_type<RowConT>()) {
        payload.emplace<RowConT>(content);
        return message_result::consumed;
    } else if(payload.holds_type<wrapped_listbox_row_content<RowConT>>()) {
        content = any_cast<wrapped_listbox_row_content<RowConT>>(payload).content;
        impl_on_update(state);
        return message_result::consumed;
    }
    return message_result::unseen;
}
 
template<class RowConT>
message_result listbox_row_button_base<RowConT>::get(sys::state& state, Cyto::Any& payload) noexcept {
    if(payload.holds_type<RowConT>()) {
        payload.emplace<RowConT>(content);
        return message_result::consumed;
    } else if(payload.holds_type<wrapped_listbox_row_content<RowConT>>()) {
        content = any_cast<wrapped_listbox_row_content<RowConT>>(payload).content;
        update(state);
        return message_result::consumed;
    }
    return message_result::unseen;
}
 
template<class RowWinT, class RowConT>
void listbox_element_base<RowWinT, RowConT>::update(sys::state& state) {
    auto content_off_screen = int32_t(row_contents.size() - row_windows.size());
    int32_t scroll_pos = list_scrollbar->raw_value();
    if(content_off_screen <= 0) {
        list_scrollbar->set_visible(state, false);
        scroll_pos = 0;
    } else {
        list_scrollbar->change_settings(state, mutable_scrollbar_settings{0, content_off_screen, 0, 0, false});
        list_scrollbar->set_visible(state, true);
        scroll_pos = std::min(scroll_pos, content_off_screen);
    }
 
    if(is_reversed()) {
        auto i = int32_t(row_contents.size()) - scroll_pos - 1;
        for(int32_t rw_i = int32_t(row_windows.size()) - 1; rw_i >= 0; rw_i--) {
            RowWinT* row_window = row_windows[size_t(rw_i)];
            if(i >= 0) {
                row_window->set_visible(state, true);
                auto prior_content = retrieve<RowConT>(state, row_window);
                auto new_content = row_contents[i--];
 
                if(prior_content != new_content) {
                    send(state, row_window, wrapped_listbox_row_content<RowConT>{ new_content });
                    if(!row_window->is_visible()) {
                        row_window->set_visible(state, true);
                    } else {
                        row_window->impl_on_update(state);
                    }
                } else {
                    row_window->set_visible(state, true);
                }
            } else {
                row_window->set_visible(state, false);
            }
        }
    } else {
        auto i = size_t(scroll_pos);
        for(RowWinT* row_window : row_windows) {
            if(i < row_contents.size()) {
                auto prior_content = retrieve<RowConT>(state, row_window);
                auto new_content = row_contents[i++];
 
                if(prior_content != new_content) {
                    send(state, row_window, wrapped_listbox_row_content<RowConT>{ new_content });
                    if(!row_window->is_visible()) {
                        row_window->set_visible(state, true);
                    } else {
                        row_window->impl_on_update(state);
                    }
                } else {
                    row_window->set_visible(state, true);
                }
            } else {
                row_window->set_visible(state, false);
            }
        }
    }
}
 
template<class RowWinT, class RowConT>
message_result listbox_element_base<RowWinT, RowConT>::on_scroll(sys::state& state, int32_t x, int32_t y, float amount, sys::key_modifiers mods) noexcept {
    if(row_contents.size() > row_windows.size()) {
        amount = is_reversed() ? -amount : amount;
        list_scrollbar->update_raw_value(state, list_scrollbar->raw_value() + (amount < 0 ? 1 : -1));
        state.ui_state.last_tooltip = nullptr; //force update of tooltip
        update(state);
        return message_result::consumed;
    }
    return message_result::unseen;
}
 
template<class RowWinT, class RowConT>
void listbox_element_base<RowWinT, RowConT>::scroll_to_bottom(sys::state& state) {
    uint32_t list_size = 0;
    for(auto rc : row_contents) {
        list_size++;
    }
    list_scrollbar->update_raw_value(state, list_size);
    state.ui_state.last_tooltip = nullptr; //force update of tooltip
    update(state);
}
 
template<typename contents_type>
message_result listbox2_base<contents_type>::on_scroll(sys::state& state, int32_t x, int32_t y, float amount, sys::key_modifiers mods) noexcept {
    if(int32_t(row_contents.size()) > visible_row_count) {
        //amount = is_reversed() ? -amount : amount;
        list_scrollbar->update_raw_value(state, list_scrollbar->raw_value() + (amount < 0 ? 1 : -1));
        impl_on_update(state);
        return message_result::consumed;
    }
    return message_result::unseen;
}
 
template<typename contents_type>
void listbox2_base<contents_type>::on_update(sys::state& state) noexcept {
    auto content_off_screen = int32_t(row_contents.size()) - visible_row_count;
    int32_t scroll_pos = list_scrollbar->raw_value();
 
    if(content_off_screen <= 0) {
        list_scrollbar->set_visible(state, false);
        list_scrollbar->update_raw_value(state, 0);
 
        int32_t i = 0;
        for(; i < int32_t(row_contents.size()); ++i) {
            row_windows[i]->set_visible(state, true);
        }
        for(; i < int32_t(row_windows.size()); ++i) {
            row_windows[i]->set_visible(state, false);
        }
    } else {
        list_scrollbar->change_settings(state, mutable_scrollbar_settings{ 0, content_off_screen, 0, 0, false });
        list_scrollbar->set_visible(state, true);
        scroll_pos = std::min(scroll_pos, content_off_screen);
 
        int32_t i = 0;
        for(; i < visible_row_count; ++i) {
            row_windows[i]->set_visible(state, true);
        }
        for(; i < int32_t(row_windows.size()); ++i) {
            row_windows[i]->set_visible(state, false);
        }
    }
}
 
template<typename contents_type>
message_result listbox2_base<contents_type>::get(sys::state& state, Cyto::Any& payload) noexcept  {
    if(payload.holds_type<listbox2_scroll_event>()) {
        impl_on_update(state);
        return message_result::consumed;
    } else if(payload.holds_type<listbox2_row_view>()) {
        listbox2_row_view ptr = any_cast<listbox2_row_view>(payload);
        for(int32_t index = 0; index < int32_t(row_windows.size()); ++index) {
            if(row_windows[index] == ptr.row) {
                stored_index = index + list_scrollbar->raw_value();
                return message_result::consumed;
            }
        }
        stored_index = -1;
        return message_result::consumed;
    } else if(payload.holds_type<contents_type>()) {
        if(0 <= stored_index && stored_index < int32_t(row_contents.size())) {
            payload = row_contents[stored_index];
        }
        return message_result::consumed;
    } else {
        return message_result::unseen;
    }
}
 
template<typename contents_type>
void listbox2_base<contents_type>::resize(sys::state& state, int32_t height) {
    int32_t row_height = row_windows[0]->base_data.position.y + row_windows[0]->base_data.size.y;
    int32_t height_covered = int32_t(row_windows.size()) * row_height;
    int32_t required_rows = (height - height_covered) / row_height;
 
    while(required_rows > 0) {
        auto new_row = make_row(state);
        row_windows.push_back(new_row.get());
        new_row->base_data.position.y += int16_t(height_covered);
        add_child_to_back(std::move(new_row));
 
        height_covered += row_height;
        --required_rows;
    }
 
    visible_row_count = height / row_height;
    base_data.size.y = int16_t(row_height * visible_row_count);
 
    if(visible_row_count != 0) {
        if(scrollbar_is_internal)
            base_data.size.x -= 16;
        list_scrollbar->scale_to_parent();
        if(scrollbar_is_internal)
            base_data.size.x += 16;
    }
}
 
template<typename contents_type>
void listbox2_base<contents_type>::on_create(sys::state& state) noexcept {
    auto ptr = make_element_by_type<listbox2_scrollbar>(state, "standardlistbox_slider");
    list_scrollbar = static_cast<listbox2_scrollbar*>(ptr.get());
    add_child_to_back(std::move(ptr));
 
    auto base_row = make_row(state);
    row_windows.push_back(base_row.get());
    add_child_to_back(std::move(base_row));
 
    resize(state, base_data.size.y);
}
template<typename contents_type>
void listbox2_base<contents_type>::render(sys::state& state, int32_t x, int32_t y) noexcept {
    dcon::gfx_object_id gid = base_data.data.list_box.background_image;
    if(gid) {
        auto const& gfx_def = state.ui_defs.gfx[gid];
        if(gfx_def.primary_texture_handle) {
            if(gfx_def.get_object_type() == ui::object_type::bordered_rect) {
                ogl::render_bordered_rect(state, get_color_modification(false, false, true), gfx_def.type_dependent, float(x), float(y),
                    float(base_data.size.x), float(base_data.size.y),
                    ogl::get_texture_handle(state, gfx_def.primary_texture_handle, gfx_def.is_partially_transparent()),
                    base_data.get_rotation(), gfx_def.is_vertically_flipped(),
                    state.world.locale_get_native_rtl(state.font_collection.get_current_locale()));
            } else {
                ogl::render_textured_rect(state, get_color_modification(false, false, true), float(x), float(y), float(base_data.size.x),
                    float(base_data.size.y),
                    ogl::get_texture_handle(state, gfx_def.primary_texture_handle, gfx_def.is_partially_transparent()),
                    base_data.get_rotation(), gfx_def.is_vertically_flipped(),
                    state.world.locale_get_native_rtl(state.font_collection.get_current_locale()));
            }
        }
    }
    container_base::render(state, x, y);
}
 
template<class RowWinT, class RowConT>
void listbox_element_base<RowWinT, RowConT>::on_create(sys::state& state) noexcept {
    int16_t current_y = 0;
    int16_t subwindow_y_size = 0;
    while(current_y + subwindow_y_size <= base_data.size.y) {
        auto ptr = make_element_by_type<RowWinT>(state, get_row_element_name());
        row_windows.push_back(static_cast<RowWinT*>(ptr.get()));
        int16_t offset = ptr->base_data.position.y;
        ptr->base_data.position.y += current_y;
        subwindow_y_size = ptr->base_data.size.y;
        current_y += ptr->base_data.size.y + offset;
        add_child_to_front(std::move(ptr));
    }
    auto ptr = make_element_by_type<standard_listbox_scrollbar<RowWinT, RowConT>>(state, "standardlistbox_slider");
    list_scrollbar = static_cast<standard_listbox_scrollbar<RowWinT, RowConT>*>(ptr.get());
    add_child_to_front(std::move(ptr));
    list_scrollbar->scale_to_parent();
 
    update(state);
}
 
template<class RowWinT, class RowConT>
void listbox_element_base<RowWinT, RowConT>::render(sys::state& state, int32_t x, int32_t y) noexcept {
    dcon::gfx_object_id gid = base_data.data.list_box.background_image;
    if(gid) {
        auto const& gfx_def = state.ui_defs.gfx[gid];
        if(gfx_def.primary_texture_handle) {
            if(gfx_def.get_object_type() == ui::object_type::bordered_rect) {
                ogl::render_bordered_rect(state, get_color_modification(false, false, true), gfx_def.type_dependent, float(x), float(y),
                    float(base_data.size.x), float(base_data.size.y),
                    ogl::get_texture_handle(state, gfx_def.primary_texture_handle, gfx_def.is_partially_transparent()),
                    base_data.get_rotation(), gfx_def.is_vertically_flipped(),
                    state.world.locale_get_native_rtl(state.font_collection.get_current_locale()));
            } else {
                ogl::render_textured_rect(state, get_color_modification(false, false, true), float(x), float(y), float(base_data.size.x),
                    float(base_data.size.y),
                    ogl::get_texture_handle(state, gfx_def.primary_texture_handle, gfx_def.is_partially_transparent()),
                    base_data.get_rotation(), gfx_def.is_vertically_flipped(),
                    state.world.locale_get_native_rtl(state.font_collection.get_current_locale()));
            }
        }
    }
    container_base::render(state, x, y);
}
template<class ItemWinT, class ItemConT>
void overlapping_listbox_element_base<ItemWinT, ItemConT>::update(sys::state& state) {
    auto spacing = int16_t(base_data.data.overlapping.spacing);
    if(base_data.get_element_type() == element_type::overlapping) {
        while(row_contents.size() > windows.size()) {
            auto ptr = make_element_by_type<ItemWinT>(state, get_row_element_name());
            if(subwindow_width <= 0) {
                subwindow_width = ptr->base_data.size.x;
            }
            windows.push_back(static_cast<ItemWinT*>(ptr.get()));
            add_child_to_front(std::move(ptr));
        }
 
        float size_ratio = float(row_contents.size() * (subwindow_width + spacing)) / float(base_data.size.x);
        int16_t offset = spacing + subwindow_width;
        if(size_ratio > 1.f) {
            offset = int16_t(float(subwindow_width) / size_ratio);
        }
        int16_t current_x = 0;
        if(base_data.data.overlapping.image_alignment == alignment::right) {
            current_x = base_data.size.x - subwindow_width - offset * int16_t(row_contents.size() - 1);
        }
        for(size_t i = 0; i < windows.size(); i++) {
            if(i < row_contents.size()) {
                update_subwindow(state, *windows[i], row_contents[i]);
                windows[i]->base_data.position.x = current_x;
                current_x += offset;
                windows[i]->set_visible(state, true);
            } else {
                windows[i]->set_visible(state, false);
            }
        }
    }
}
 
std::string_view overlapping_flags_box::get_row_element_name() {
    return "flag_list_flag";
}
 
void overlapping_flags_box::update_subwindow(sys::state& state, overlapping_flags_flag_button& subwindow,
        dcon::national_identity_id content) {
    subwindow.set_current_nation(state, content);
}
 
void overlapping_flags_box::on_update(sys::state& state) noexcept {
    current_nation = retrieve<dcon::nation_id>(state, parent);
    populate_flags(state);
}
 
void overlapping_friendly_flags::populate_flags(sys::state& state) {
    if(bool(current_nation)) {
        row_contents.clear();
        for(auto it : state.world.nation_get_gp_relationship_as_great_power(current_nation)) {
            if((it.get_status() & nations::influence::level_mask) == nations::influence::level_friendly) {
                row_contents.push_back(it.get_influence_target().get_identity_from_identity_holder());
            }
        }
        update(state);
    }
}
 
void overlapping_cordial_flags::populate_flags(sys::state& state) {
    if(bool(current_nation)) {
        row_contents.clear();
        for(auto it : state.world.nation_get_gp_relationship_as_great_power(current_nation)) {
            if((it.get_status() & nations::influence::level_mask) == nations::influence::level_cordial) {
                row_contents.push_back(it.get_influence_target().get_identity_from_identity_holder());
            }
        }
        update(state);
    }
}
 
void overlapping_sphere_flags::populate_flags(sys::state& state) {
    if(bool(current_nation)) {
        row_contents.clear();
        if(state.world.nation_get_in_sphere_of(current_nation)) {
            row_contents.push_back(state.world.nation_get_in_sphere_of(current_nation).get_identity_from_identity_holder());
        }
        for(auto it : state.world.nation_get_gp_relationship_as_great_power(current_nation)) {
            if((it.get_status() & nations::influence::level_mask) == nations::influence::level_in_sphere) {
                row_contents.push_back(it.get_influence_target().get_identity_from_identity_holder());
            }
        }
        update(state);
    }
}
 
void overlapping_puppet_flags::populate_flags(sys::state& state) {
    if(bool(current_nation)) {
        row_contents.clear();
        auto fat_id = dcon::fatten(state.world, current_nation);
        auto overlord = state.world.nation_get_overlord_as_subject(current_nation);
        auto overlord_nation = dcon::fatten(state.world, overlord).get_ruler();
        if(bool(overlord_nation)) {
            row_contents.push_back(overlord_nation.get_identity_from_identity_holder().id);
        } else {
            for(auto puppet : state.world.nation_get_overlord_as_ruler(current_nation)) {
                row_contents.push_back(puppet.get_subject().get_identity_from_identity_holder().id);
            }
        }
        update(state);
    }
}
 
void overlapping_ally_flags::populate_flags(sys::state& state) {
    if(bool(current_nation)) {
        row_contents.clear();
        for(auto rel : state.world.nation_get_diplomatic_relation(current_nation)) {
            if(rel.get_are_allied()) {
                auto ally = nations::get_relationship_partner(state, rel.id, current_nation);
                auto fat_ally = dcon::fatten(state.world, ally);
                row_contents.push_back(fat_ally.get_identity_from_identity_holder().id);
            }
        }
        update(state);
    }
}
 
void overlapping_enemy_flags::populate_flags(sys::state& state) {
    if(bool(current_nation)) {
        row_contents.clear();
        for(auto wa : state.world.nation_get_war_participant(current_nation)) {
            bool is_attacker = wa.get_is_attacker();
            for(auto o : wa.get_war().get_war_participant()) {
                if(o.get_is_attacker() != is_attacker) {
                    row_contents.push_back(o.get_nation().get_identity_from_identity_holder().id);
                }
            }
        }
        update(state);
    }
}
 
 
std::string_view overlapping_truce_flags::get_row_element_name() {
    return "flag_list_flag";
}
 
void overlapping_truce_flag_button::update_tooltip(sys::state& state, int32_t x, int32_t y, text::columnar_layout& contents) noexcept {
    text::add_line(state, contents, "trucewith", text::variable_type::list, n);
    text::add_line(state, contents, "until_date", text::variable_type::x, until);
}
 
void overlapping_truce_flags::update_subwindow(sys::state& state, overlapping_truce_flag_button& subwindow, truce_pair content) {
    subwindow.upate_truce(state, content.n, content.until);
}
 
void overlapping_truce_flags::on_update(sys::state& state) noexcept {
    current_nation = retrieve<dcon::nation_id>(state, parent);
 
    row_contents.clear();
    for(auto rel : state.world.nation_get_diplomatic_relation(current_nation)) {
        if(rel.get_truce_until() && state.current_date < rel.get_truce_until()) {
            auto other = rel.get_related_nations(0) != current_nation ? rel.get_related_nations(0) : rel.get_related_nations(1);
            if(!military::are_at_war(state, current_nation, other)) {
                row_contents.push_back(truce_pair{ other, rel.get_truce_until() });
            }
        }
    }
    update(state);
}
 
 
dcon::national_identity_id flag_button::get_current_nation(sys::state& state) noexcept {
    auto nation = retrieve<dcon::national_identity_id>(state, parent);
    if(bool(nation)) {
        return nation;
    } else {
        return state.world.nation_get_identity_from_identity_holder(retrieve<dcon::nation_id>(state, parent));
    }
}
 
dcon::rebel_faction_id flag_button::get_current_rebel_faction(sys::state& state) noexcept {
    return retrieve<dcon::rebel_faction_id>(state, parent);
}
 
void flag_button::button_action(sys::state& state) noexcept {
    auto ident = get_current_nation(state);
    if(!ident)
        return;
 
    auto fat_id = dcon::fatten(state.world, ident);
    auto nation = fat_id.get_nation_from_identity_holder();
    if(bool(nation.id) && nation.get_owned_province_count() != 0) {
        state.open_diplomacy(nation.id);
    }
}
 
void flag_button2::button_action(sys::state& state) noexcept {
    auto nid = retrieve<dcon::nation_id>(state, this);
    auto tid = retrieve<dcon::national_identity_id>(state, this);
    if(!nid && tid) {
        nid = state.world.national_identity_get_nation_from_identity_holder(tid);
    }
    auto rid = retrieve<dcon::rebel_faction_id>(state, this);
    if(!nid && rid) {
        nid = state.world.rebel_faction_get_ruler_from_rebellion_within(rid);
    }
    if(nid && state.world.nation_get_owned_province_count(nid) != 0)
        state.open_diplomacy(nid);
}
 
void flag_button2::on_update(sys::state& state) noexcept {
    auto nid = retrieve<dcon::nation_id>(state, this);
    if(nid) {
        flag_texture_handle = ogl::get_flag_handle(state, state.world.nation_get_identity_from_identity_holder(nid), culture::get_current_flag_type(state, nid));
        return;
    }
 
    auto tid = retrieve<dcon::national_identity_id>(state, this);
    if(!nid && tid) {
        flag_texture_handle = ogl::get_flag_handle(state, tid, culture::get_current_flag_type(state, tid));
        return;
    }
 
    auto reb_tag = state.national_definitions.rebel_id;
    flag_texture_handle = ogl::get_flag_handle(state, reb_tag, culture::flag_type::default_flag);
}
 
void flag_button2::update_tooltip(sys::state& state, int32_t x, int32_t y, text::columnar_layout& contents) noexcept {
    auto nid = retrieve<dcon::nation_id>(state, this);
    if(nid) {
        auto box = text::open_layout_box(contents, 0);
        text::add_to_layout_box(state, contents, box, nid);
        text::close_layout_box(contents, box);
        return;
    }
    auto tid = retrieve<dcon::national_identity_id>(state, this);
    if(tid) {
        auto box = text::open_layout_box(contents, 0);
        text::add_to_layout_box(state, contents, box, tid);
        text::close_layout_box(contents, box);
        return;
    }
    auto rid = retrieve<dcon::rebel_faction_id>(state, this);
    if(rid) {
        auto box = text::open_layout_box(contents, 0);
        text::add_to_layout_box(state, contents, box, rebel::rebel_name(state, rid));
        text::close_layout_box(contents, box);
        return;
    }
}
 
void flag_button2::render(sys::state& state, int32_t x, int32_t y) noexcept {
    dcon::gfx_object_id gid;
    if(base_data.get_element_type() == element_type::image) {
        gid = base_data.data.image.gfx_object;
    } else if(base_data.get_element_type() == element_type::button) {
        gid = base_data.data.button.button_image;
    }
    if(gid && flag_texture_handle > 0) {
        auto const& gfx_def = state.ui_defs.gfx[gid];
        if(gfx_def.type_dependent) {
            auto mask_handle = ogl::get_texture_handle(state, dcon::texture_id(gfx_def.type_dependent - 1), true);
            auto& mask_tex = state.open_gl.asset_textures[dcon::texture_id(gfx_def.type_dependent - 1)];
            ogl::render_masked_rect(state, get_color_modification(this == state.ui_state.under_mouse, disabled, interactable),
                float(x) + float(base_data.size.x - mask_tex.size_x) * 0.5f,
                float(y) + float(base_data.size.y - mask_tex.size_y) * 0.5f,
                float(mask_tex.size_x),
                float(mask_tex.size_y),
                flag_texture_handle, mask_handle, base_data.get_rotation(), gfx_def.is_vertically_flipped(),
                false);
        } else {
            ogl::render_textured_rect(state, get_color_modification(this == state.ui_state.under_mouse, disabled, interactable),
                float(x), float(y), float(base_data.size.x), float(base_data.size.y), flag_texture_handle, base_data.get_rotation(),
                gfx_def.is_vertically_flipped(),
                false);
        }
    }
    image_element_base::render(state, x, y);
}
 
void flag_button::set_current_nation(sys::state& state, dcon::national_identity_id ident) noexcept {
    if(!bool(ident))
        ident = state.national_definitions.rebel_id;
 
    auto fat_id = dcon::fatten(state.world, ident);
    auto nation = fat_id.get_nation_from_identity_holder();
    culture::flag_type flag_type = culture::flag_type{};
    if(bool(nation.id) && nation.get_owned_province_count() != 0) {
        flag_type = culture::get_current_flag_type(state, nation.id);
    } else {
        flag_type = culture::get_current_flag_type(state, ident);
    }
    flag_texture_handle = ogl::get_flag_handle(state, ident, flag_type);
}
 
void flag_button::on_update(sys::state& state) noexcept {
    set_current_nation(state, get_current_nation(state));
}
 
void flag_button::on_create(sys::state& state) noexcept {
    button_element_base::on_create(state);
}
 
void flag_button::render(sys::state& state, int32_t x, int32_t y) noexcept {
    dcon::gfx_object_id gid;
    if(base_data.get_element_type() == element_type::image) {
        gid = base_data.data.image.gfx_object;
    } else if(base_data.get_element_type() == element_type::button) {
        gid = base_data.data.button.button_image;
    }
    if(gid && flag_texture_handle > 0) {
        auto const& gfx_def = state.ui_defs.gfx[gid];
        if(gfx_def.type_dependent) {
            auto mask_handle = ogl::get_texture_handle(state, dcon::texture_id(gfx_def.type_dependent - 1), true);
            auto& mask_tex = state.open_gl.asset_textures[dcon::texture_id(gfx_def.type_dependent - 1)];
            ogl::render_masked_rect(state, get_color_modification(this == state.ui_state.under_mouse, disabled, interactable),
                float(x) + float(base_data.size.x - mask_tex.size_x) * 0.5f,
                float(y) + float(base_data.size.y - mask_tex.size_y) * 0.5f,
                float(mask_tex.size_x),
                float(mask_tex.size_y),
                flag_texture_handle, mask_handle, base_data.get_rotation(), gfx_def.is_vertically_flipped(),
                false);
        } else {
            ogl::render_textured_rect(state, get_color_modification(this == state.ui_state.under_mouse, disabled, interactable),
                float(x), float(y), float(base_data.size.x), float(base_data.size.y), flag_texture_handle, base_data.get_rotation(),
                gfx_def.is_vertically_flipped(),
                false);
        }
    }
    image_element_base::render(state, x, y);
}
void flag_button::update_tooltip(sys::state& state, int32_t x, int32_t y, text::columnar_layout& contents) noexcept {
    auto ident = get_current_nation(state);
    if(ident) {
        auto name = nations::name_from_tag(state, ident);
        if(name) {
            auto box = text::open_layout_box(contents, 0);
            text::add_to_layout_box(state, contents, box, name);
            text::close_layout_box(contents, box);
        }
    } else {
        if(auto reb = get_current_rebel_faction(state); reb) {
            auto box = text::open_layout_box(contents, 0);
            text::add_to_layout_box(state, contents, box, rebel::rebel_name(state, reb));
            text::close_layout_box(contents, box);
            return;
        }
    }
}
 
void province_script_button::button_action(sys::state& state) noexcept {
    auto p = retrieve<dcon::province_id>(state, parent);
    if(p && state.local_player_nation)
        command::use_province_button(state, state.local_player_nation, base_definition, p);
}
void province_script_button::on_update(sys::state& state) noexcept {
    disabled = false;
    auto& def = state.ui_defs.gui[base_definition];
    if(def.get_element_type() != ui::element_type::button) {
        disabled = true;
        return;
    }
    if(def.data.button.get_button_scripting() != ui::button_scripting::province) {
        disabled = true;
        return;
    }
    auto p = retrieve<dcon::province_id>(state, parent);
    if(!p) {
        disabled = true;
        return;
    }
    disabled = !command::can_use_province_button(state, state.local_player_nation, base_definition, p);
}
void province_script_button::update_tooltip(sys::state& state, int32_t x, int32_t y, text::columnar_layout& contents) noexcept {
    auto& def = state.ui_defs.gui[base_definition];
 
    if(def.get_element_type() != ui::element_type::button)
        return;
    if(def.data.button.get_button_scripting() != ui::button_scripting::province)
        return;
    auto p = retrieve<dcon::province_id>(state, parent);
    if(!p)
        return;
    if(!state.local_player_nation)
        return;
 
    auto name = state.to_string_view(def.name);
    auto tt_name = std::string{ name } + "_tooltip";
    if(state.key_is_localized(tt_name)) {
        text::add_line(state, contents, std::string_view{tt_name}, text::variable_type::province, p, text::variable_type::nation, state.world.province_get_nation_from_province_ownership(p), text::variable_type::player, state.local_player_nation);
        text::add_line_break_to_layout(state, contents);
    }
 
    if(def.data.button.scriptable_enable) {
        text::add_line(state, contents, "allow_reform_cond");
        ui::trigger_description(state, contents, def.data.button.scriptable_enable, trigger::to_generic(p), trigger::to_generic(p), trigger::to_generic(state.local_player_nation));
        text::add_line_break_to_layout(state, contents);
    }
    if(def.data.button.scriptable_effect) {
        text::add_line(state, contents, "msg_decision_2");
        ui::effect_description(state, contents, def.data.button.scriptable_effect, trigger::to_generic(p), trigger::to_generic(p), trigger::to_generic(state.local_player_nation), uint32_t(state.current_date.value), uint32_t(p.index() ^ (base_definition.index() << 4)));
    }
}
void nation_script_button::button_action(sys::state& state) noexcept {
    auto n = retrieve<dcon::nation_id>(state, parent);
    if(n && state.local_player_nation) {
        command::use_nation_button(state, state.local_player_nation, base_definition, n);
    } else if(state.local_player_nation) {
        command::use_nation_button(state, state.local_player_nation, base_definition, state.local_player_nation);
    }
}
void nation_script_button::on_update(sys::state& state) noexcept {
    disabled = false;
    auto& def = state.ui_defs.gui[base_definition];
    if(def.get_element_type() != ui::element_type::button) {
        disabled = true;
        return;
    }
    if(def.data.button.get_button_scripting() != ui::button_scripting::nation) {
        disabled = true;
        return;
    }
    auto n = retrieve<dcon::nation_id>(state, parent);
    if(!state.local_player_nation) {
        disabled = true;
        return;
    }
    disabled = !command::can_use_nation_button(state, state.local_player_nation, base_definition, n ? n : state.local_player_nation);
}
void nation_script_button::update_tooltip(sys::state& state, int32_t x, int32_t y, text::columnar_layout& contents) noexcept {
    auto& def = state.ui_defs.gui[base_definition];
 
    if(def.get_element_type() != ui::element_type::button)
        return;
    if(def.data.button.get_button_scripting() != ui::button_scripting::nation)
        return;
    auto n = retrieve<dcon::nation_id>(state, parent);
    if(!n)
        n = state.local_player_nation;
    if(!state.local_player_nation)
        return;
 
    auto name = state.to_string_view(def.name);
    auto tt_name = std::string{ name } + "_tooltip";
    if(state.key_is_localized(tt_name)) {
        text::add_line(state, contents, std::string_view{ tt_name }, text::variable_type::nation, n, text::variable_type::player, state.local_player_nation);
        text::add_line_break_to_layout(state, contents);
    }
 
    if(def.data.button.scriptable_enable) {
        text::add_line(state, contents, "allow_reform_cond");
        ui::trigger_description(state, contents, def.data.button.scriptable_enable, trigger::to_generic(n), trigger::to_generic(n), trigger::to_generic(state.local_player_nation));
        text::add_line_break_to_layout(state, contents);
    }
    if(def.data.button.scriptable_effect) {
        text::add_line(state, contents, "msg_decision_2");
        ui::effect_description(state, contents, def.data.button.scriptable_effect, trigger::to_generic(n), trigger::to_generic(n), trigger::to_generic(state.local_player_nation), uint32_t(state.current_date.value), uint32_t(n.index() ^ (base_definition.index() << 4)));
    }
}
 
message_result draggable_target::on_lbutton_down(sys::state& state, int32_t x, int32_t y, sys::key_modifiers mods) noexcept {
    for(auto tmp = parent; tmp != nullptr; tmp = tmp->parent) {
        if(tmp->base_data.get_element_type() == element_type::window && tmp->base_data.data.window.is_moveable()) {
            state.ui_state.drag_target = tmp;
            return message_result::consumed;
        }
    }
    return message_result::consumed;
}
 
std::unique_ptr<element_base> make_element_immediate(sys::state& state, dcon::gui_def_id id) {
    auto& def = state.ui_defs.gui[id];
    if(def.get_element_type() == ui::element_type::image) {
        auto res = std::make_unique<image_element_base>();
        std::memcpy(&(res->base_data), &def, sizeof(ui::element_data));
        make_size_from_graphics(state, res->base_data);
        res->on_create(state);
        return res;
    } else if(def.get_element_type() == ui::element_type::button) {
        if(def.data.button.get_button_scripting() == ui::button_scripting::province) {
            auto res = std::make_unique<province_script_button>(id);
            std::memcpy(&(res->base_data), &def, sizeof(ui::element_data));
            make_size_from_graphics(state, res->base_data);
            res->on_create(state);
            return res;
        } else if(def.data.button.get_button_scripting() == ui::button_scripting::nation) {
            auto res = std::make_unique<nation_script_button>(id);
            std::memcpy(&(res->base_data), &def, sizeof(ui::element_data));
            make_size_from_graphics(state, res->base_data);
            res->on_create(state);
            return res;
        } else {
            auto res = std::make_unique<button_element_base>();
            std::memcpy(&(res->base_data), &def, sizeof(ui::element_data));
            make_size_from_graphics(state, res->base_data);
            res->on_create(state);
            return res;
        }
    } else if(def.get_element_type() == ui::element_type::window) {
        auto res = std::make_unique<window_element_base>();
        std::memcpy(&(res->base_data), &def, sizeof(ui::element_data));
        res->on_create(state);
        return res;
    } else if(def.get_element_type() == ui::element_type::scrollbar) {
        auto res = std::make_unique<scrollbar>();
        std::memcpy(&(res->base_data), &def, sizeof(ui::element_data));
        res->on_create(state);
        return res;
    } else if(def.get_element_type() == ui::element_type::text) {
        auto res = std::make_unique<simple_text_element_base>();
        std::memcpy(&(res->base_data), &def, sizeof(ui::element_data));
        res->on_create(state);
        return res;
    }
    // TODO: other defaults
 
    return nullptr;
}
 
void scrollbar_left::button_action(sys::state& state) noexcept {
    send(state, parent, value_change{ -step_size, true, true });
}
void scrollbar_left::button_shift_action(sys::state& state) noexcept {
    send(state, parent, value_change{ -step_size * 5, true, true });
}
void scrollbar_left::button_shift_right_action(sys::state& state) noexcept {
    send(state, parent, value_change{ -step_size * 10000, true, true });
}
void scrollbar_right::button_action(sys::state& state) noexcept {
    send(state, parent, value_change{ step_size, true, true });
}
void scrollbar_right::button_shift_action(sys::state& state) noexcept {
    send(state, parent, value_change{ step_size * 5, true, true });
}
void scrollbar_right::button_shift_right_action(sys::state& state) noexcept {
    send(state, parent, value_change{ step_size * 10000, true, true });
}
 
message_result scrollbar_right::set(sys::state& state, Cyto::Any& payload) noexcept {
    if(payload.holds_type<scrollbar_settings>()) {
        return message_result::consumed;
    }
    return message_result::unseen;
}
message_result scrollbar_left::set(sys::state& state, Cyto::Any& payload) noexcept {
    if(payload.holds_type<scrollbar_settings>()) {
        return message_result::consumed;
    }
    return message_result::unseen;
}
 
message_result scrollbar_track::on_lbutton_down(sys::state& state, int32_t x, int32_t y, sys::key_modifiers mods) noexcept {
    scrollbar_settings parent_state = retrieve<scrollbar_settings>(state, parent);
    int32_t pos_in_track = parent_state.vertical ? y : x;
    int32_t clamped_pos = std::clamp(pos_in_track, parent_state.buttons_size / 2, parent_state.track_size - parent_state.buttons_size / 2);
    float fp_pos = float(clamped_pos - parent_state.buttons_size / 2) / float(parent_state.track_size - parent_state.buttons_size);
    if(!parent_state.vertical && state.world.locale_get_native_rtl(state.font_collection.get_current_locale())) {
        fp_pos = 1.f - fp_pos;
        assert(fp_pos >= 0.f && fp_pos <= 1.f);
    }
    send(state, parent, value_change{ int32_t(parent_state.lower_value + fp_pos * (parent_state.upper_value - parent_state.lower_value)), true, false });
    return message_result::consumed;
}
 
tooltip_behavior scrollbar_track::has_tooltip(sys::state& state) noexcept {
    if(parent)
        return parent->has_tooltip(state);
    return opaque_element_base::has_tooltip(state);
}
void scrollbar_track::update_tooltip(sys::state& state, int32_t x, int32_t y, text::columnar_layout& contents) noexcept {
    if(parent)
        return parent->update_tooltip(state, x, y, contents);
    return opaque_element_base::update_tooltip(state, x, y, contents);
}
 
message_result scrollbar_slider::on_lbutton_down(sys::state& state, int32_t x, int32_t y, sys::key_modifiers mods) noexcept {
    state.ui_state.drag_target = this;
    return message_result::consumed;
}
void scrollbar_slider::on_drag(sys::state& state, int32_t oldx, int32_t oldy, int32_t x, int32_t y, sys::key_modifiers mods) noexcept {
    if(!parent)
        return;
 
    auto location_abs = get_absolute_location(state, *this);
    scrollbar_settings parent_settings = retrieve<scrollbar_settings>(state, parent);
    if(parent_settings.vertical) {
        if(!(location_abs.y <= oldy && oldy < base_data.size.y + location_abs.y)) {
            return; // drag has left slider behind
        }
    } else {
        if(!(location_abs.x <= oldx && oldx < base_data.size.x + location_abs.x)) {
            return; // drag has left slider behind
        }
    }
 
    int32_t pos_in_track = 0;
 
    // TODO: take care of case where there are partial range limits
 
    float min_percentage = float(parent_settings.lower_limit - parent_settings.lower_value) / float(parent_settings.upper_value - parent_settings.lower_value);
    auto min_offest = parent_settings.buttons_size + int32_t((parent_settings.track_size - parent_settings.buttons_size) * min_percentage);
 
    float max_percentage = float(parent_settings.upper_limit - parent_settings.lower_value) /  float(parent_settings.upper_value - parent_settings.lower_value);
    auto max_offest = parent_settings.buttons_size + int32_t((parent_settings.track_size - parent_settings.buttons_size) * max_percentage);
 
    if(parent_settings.vertical) {
        base_data.position.y += int16_t(y - oldy);
        base_data.position.y = int16_t(std::clamp(int32_t(base_data.position.y), parent_settings.using_limits ? min_offest : parent_settings.buttons_size, parent_settings.using_limits ? max_offest : parent_settings.track_size));
        pos_in_track = base_data.position.y - parent_settings.buttons_size / 2;
    } else {
        if(state.world.locale_get_native_rtl(state.font_collection.get_current_locale())) {
            base_data.position.x += int16_t(oldx - x);
        } else {
            base_data.position.x += int16_t(x - oldx);
        }
        base_data.position.x = int16_t(std::clamp(int32_t(base_data.position.x), parent_settings.using_limits ? min_offest : parent_settings.buttons_size, parent_settings.using_limits ? max_offest : parent_settings.track_size));
        pos_in_track = base_data.position.x - parent_settings.buttons_size / 2;
    }
    float fp_pos = float(pos_in_track - parent_settings.buttons_size / 2) / float(parent_settings.track_size - parent_settings.buttons_size);
 
    Cyto::Any adjustment_payload = value_change{ int32_t(parent_settings.lower_value + fp_pos * (parent_settings.upper_value - parent_settings.lower_value)), true, false};
    parent->impl_get(state, adjustment_payload);
}
 
void scrollbar::update_raw_value(sys::state& state, int32_t v) {
    stored_value = settings.using_limits ? std::clamp(v, settings.lower_limit, settings.upper_limit) : std::clamp(v, settings.lower_value, settings.upper_value);
 
    float percentage = float(stored_value - settings.lower_value) / float(settings.upper_value - settings.lower_value);
    auto offset = settings.buttons_size + int32_t((settings.track_size - settings.buttons_size) * percentage);
    if(slider && state.ui_state.drag_target != slider) {
        if(settings.vertical)
            slider->base_data.position.y = int16_t(offset);
        else
            slider->base_data.position.x = int16_t(offset);
    }
}
void scrollbar::update_scaled_value(sys::state& state, float v) {
    float scaling_factor = float(settings.scaling_factor);
    // Non-vanilla special accomodation
    if(base_data.data.scrollbar.get_step_size() == ui::step_size::twenty_five) {
        scaling_factor = 0.25f;
    }
    int32_t rv = std::clamp(int32_t(v * scaling_factor), settings.lower_value, settings.upper_value);
    update_raw_value(state, rv);
}
float scrollbar::scaled_value() const {
    return float(stored_value) / float(settings.scaling_factor);
}
int32_t scrollbar::raw_value() const {
    return stored_value;
}
 
void scrollbar::change_settings(sys::state& state, mutable_scrollbar_settings const& settings_s) {
    settings.lower_limit = settings_s.lower_limit * settings.scaling_factor;
    settings.lower_value = settings_s.lower_value * settings.scaling_factor;
    settings.upper_limit = settings_s.upper_limit * settings.scaling_factor;
    settings.upper_value = settings_s.upper_value * settings.scaling_factor;
    settings.using_limits = settings_s.using_limits;
 
    settings.upper_value = std::max(settings.upper_value, settings.lower_value + 1); // ensure the scrollbar is never of range zero
 
    if(settings.using_limits) {
        if(right_limit) {
            right_limit->set_visible(state, settings.lower_value < settings.lower_limit);
 
            float percentage = float(settings.lower_limit - settings.lower_value) / float(settings.upper_value - settings.lower_value);
            auto offset = settings.buttons_size + int32_t((settings.track_size - settings.buttons_size) * percentage);
            if(settings.vertical)
                right_limit->base_data.position.y = int16_t(offset);
            else
                right_limit->base_data.position.x = int16_t(offset);
        }
        if(left_limit) {
            left_limit->set_visible(state, settings.upper_value > settings.upper_limit);
 
            float percentage = float(settings.upper_limit - settings.lower_value) / float(settings.upper_value - settings.lower_value);
            auto offset = settings.buttons_size + int32_t((settings.track_size - settings.buttons_size) * percentage);
            if(settings.vertical)
                left_limit->base_data.position.y = int16_t(offset + settings.buttons_size - 10);
            else
                left_limit->base_data.position.x = int16_t(offset + settings.buttons_size - 10);
        }
        if(stored_value < settings.lower_limit || stored_value > settings.upper_limit) {
            update_raw_value(state, stored_value);
            //on_value_change(state, stored_value);
        }
    } else {
        if(right_limit)
            right_limit->set_visible(state, false);
        if(left_limit)
            left_limit->set_visible(state, false);
        if(stored_value < settings.lower_value || stored_value > settings.upper_value) {
            update_raw_value(state, stored_value);
            //on_value_change(state, stored_value);
        }
    }
}
 
void scrollbar::on_create(sys::state& state) noexcept {
    // create & position sub elements
    // fill out settings data
    // set initial slider pos
 
    if(base_data.get_element_type() == element_type::scrollbar) {
        auto step = base_data.data.scrollbar.get_step_size();
        settings.scaling_factor = 1;
        switch(step) {
        case step_size::twenty_five:
            break;
        case step_size::two:
            break;
        case step_size::one:
            break;
        case step_size::one_tenth:
            settings.scaling_factor = 10;
            break;
        case step_size::one_hundredth:
            settings.scaling_factor = 100;
            break;
        case step_size::one_thousandth:
            settings.scaling_factor = 1000;
            break;
        }
        settings.lower_value = 0;
        settings.upper_value = base_data.data.scrollbar.max_value * settings.scaling_factor;
        settings.lower_limit = 0;
        settings.upper_limit = settings.upper_value;
 
        settings.vertical = !base_data.data.scrollbar.is_horizontal();
        stored_value = settings.lower_value;
 
        auto first_child = base_data.data.scrollbar.first_child;
        auto num_children = base_data.data.scrollbar.num_children;
 
        if(num_children >= 6) {
            auto child_tag = dcon::gui_def_id(dcon::gui_def_id::value_base_t(5 + first_child.index()));
            auto ch_res = make_element_by_type<image_element_base>(state, child_tag);
            right_limit = ch_res.get();
            right_limit->set_visible(state, false);
            add_child_to_back(std::move(ch_res));
        }
        if(num_children >= 5) {
            auto child_tag = dcon::gui_def_id(dcon::gui_def_id::value_base_t(4 + first_child.index()));
            auto ch_res = make_element_by_type<image_element_base>(state, child_tag);
            left_limit = ch_res.get();
            left_limit->set_visible(state, false);
            add_child_to_back(std::move(ch_res));
        }
 
        if(num_children >= 4) {
            {
                auto child_tag = dcon::gui_def_id(dcon::gui_def_id::value_base_t(2 + first_child.index()));
                auto ch_res = make_element_by_type<scrollbar_slider>(state, child_tag);
                slider = ch_res.get();
                add_child_to_back(std::move(ch_res));
            }
            {
                auto child_tag = dcon::gui_def_id(dcon::gui_def_id::value_base_t(0 + first_child.index()));
                auto ch_res = make_element_by_type<scrollbar_left>(state, child_tag);
                left = ch_res.get();
                add_child_to_back(std::move(ch_res));
 
                settings.buttons_size = settings.vertical ? left->base_data.size.y : left->base_data.size.x;
                if(step_size::twenty_five == step)
                    left->step_size = 25;
                else if(step_size::two == step)
                    left->step_size = 2;
                else
                    left->step_size = 1;
            }
            {
                auto child_tag = dcon::gui_def_id(dcon::gui_def_id::value_base_t(1 + first_child.index()));
                auto ch_res = make_element_by_type<scrollbar_right>(state, child_tag);
                right = ch_res.get();
                add_child_to_back(std::move(ch_res));
 
                if(step_size::twenty_five == step)
                    right->step_size = 25;
                else if(step_size::two == step)
                    right->step_size = 2;
                else
                    right->step_size = 1;
            }
            {
                auto child_tag = dcon::gui_def_id(dcon::gui_def_id::value_base_t(3 + first_child.index()));
                auto ch_res = make_element_by_type<scrollbar_track>(state, child_tag);
                track = ch_res.get();
                add_child_to_back(std::move(ch_res));
 
                settings.track_size = settings.vertical ? track->base_data.size.y : track->base_data.size.x;
            }
            left->base_data.position.x = 0;
            left->base_data.position.y = 0;
            if(settings.vertical) {
                track->base_data.position.y = int16_t(settings.buttons_size);
                slider->base_data.position.y = int16_t(settings.buttons_size);
                right->base_data.position.y = int16_t(settings.track_size + settings.buttons_size);
                // track->base_data.position.x = 0;
                slider->base_data.position.x = 0;
                right->base_data.position.x = 0;
            } else {
                track->base_data.position.x = int16_t(settings.buttons_size);
                slider->base_data.position.x = int16_t(settings.buttons_size);
                right->base_data.position.x = int16_t(settings.track_size + settings.buttons_size);
                // track->base_data.position.y = 0;
                slider->base_data.position.y = 0;
                right->base_data.position.y = 0;
            }
        }
    }
}
void scrollbar_slider::on_drag_finish(sys::state& state) noexcept {
    if(parent) {
        parent->impl_on_drag_finish(state);
    }
}
message_result scrollbar::get(sys::state& state, Cyto::Any& payload) noexcept {
    if(payload.holds_type<scrollbar_settings>()) {
        settings.track_size = track ? int32_t(settings.vertical ? track->base_data.size.y : track->base_data.size.x) : 1;
        payload = settings;
        return message_result::consumed;
    } else if(payload.holds_type<value_change>()) {
        auto adjustments = any_cast<value_change>(payload);
 
        if(adjustments.is_relative)
            stored_value += adjustments.new_value;
        else
            stored_value = adjustments.new_value;
 
        if(adjustments.move_slider) {
            update_raw_value(state, stored_value);
        } else {
            stored_value = settings.using_limits ? std::clamp(stored_value, settings.lower_limit, settings.upper_limit)
                                                                                     : std::clamp(stored_value, settings.lower_value, settings.upper_value);
        }
 
        if(adjustments.move_slider == true && adjustments.is_relative == false && !state.ui_state.drag_target) { // track click
            state.ui_state.drag_target = slider;
        }
 
        on_value_change(state, stored_value);
        return message_result::unseen;
    } else {
        return message_result::unseen;
    }
}
 
void unit_frame_bg::update_tooltip(sys::state& state, int32_t x, int32_t y, text::columnar_layout& contents) noexcept {
    auto display_unit = retrieve< unit_var>(state, parent);
    if(std::holds_alternative<dcon::army_id>(display_unit))
        single_unit_tooltip(state, contents, std::get<dcon::army_id>(display_unit));
    else if(std::holds_alternative<dcon::navy_id>(display_unit))
        single_unit_tooltip(state, contents, std::get<dcon::navy_id>(display_unit));
    text::add_line(state, contents, "unit_controls_tooltip_1");
    if(state.network_mode != sys::network_mode_type::single_player)
        text::add_line(state, contents, "unit_controls_tooltip_2");
    text::add_line(state, contents, "unit_control_group_tooltip");
}
 
void populate_shortcut_tooltip(sys::state& state, ui::element_base& elm, text::columnar_layout& contents) noexcept {
    if(elm.base_data.get_element_type() != ui::element_type::button)
        return;
    if(elm.base_data.data.button.shortcut == sys::virtual_key::NONE)
        return;
    static const std::string_view key_names[] = { //enum class virtual_key : uint8_t {
        "", //NONE = 0x00,
        "Left-Button", //LBUTTON = 0x01,
        "Right-Button", //RBUTTON = 0x02,
        "Cancel", //CANCEL = 0x03,
        "Multimedia button", //MBUTTON = 0x04,
        "XButton1", //XBUTTON_1 = 0x05,
        "XButton2", //XBUTTON_2 = 0x06,
        "", //0x07
        "Backspace", //BACK = 0x08,
        "TAB", //TAB = 0x09,
        "", // 0x0A
        "", // 0x0B
        "Clear", //CLEAR = 0x0C,
        "Return", //RETURN = 0x0D,
        "", // 0x0E
        "", // 0x0F
        "Shift", //SHIFT = 0x10,
        "Control", //CONTROL = 0x11,
        "Menu", //MENU = 0x12,
        "Pause", //PAUSE = 0x13,
        "Capital", //CAPITAL = 0x14,
        "Kana", //KANA = 0x15,
        "", // 0x16
        "Junja", //JUNJA = 0x17,
        "Final", //FINAL = 0x18,
        "Kanji", //KANJI = 0x19,
        "", // 0x1A
        "Escape", //ESCAPE = 0x1B,
        "Convert", //CONVERT = 0x1C,
        "Nonconvert", //NONCONVERT = 0x1D,
        "Accept", //ACCEPT = 0x1E,
        "Modechange", //MODECHANGE = 0x1F,
        "Spacebar", //SPACE = 0x20,
        "Prior", //PRIOR = 0x21,
        "Next", //NEXT = 0x22,
        "End", //END = 0x23,
        "Home", //HOME = 0x24,
        "Left", //LEFT = 0x25,
        "Up", //UP = 0x26,
        "Right", //RIGHT = 0x27,
        "Down", //DOWN = 0x28,
        "Select", //SELECT = 0x29,
        "Print", //PRINT = 0x2A,
        "Execute", //EXECUTE = 0x2B,
        "Snapshot", //SNAPSHOT = 0x2C,
        "Insert", //INSERT = 0x2D,
        "Delete", //DELETE_KEY = 0x2E,
        "Help", //HELP = 0x2F,
        "0", //NUM_0 = 0x30,
        "1", //NUM_1 = 0x31,
        "2", //NUM_2 = 0x32,
        "3", //NUM_3 = 0x33,
        "4", //NUM_4 = 0x34,
        "5", //NUM_5 = 0x35,
        "6", //NUM_6 = 0x36,
        "7", //NUM_7 = 0x37,
        "8", //NUM_8 = 0x38,
        "9", //NUM_9 = 0x39,
        "", // 0x3A
        "", // 0x3B
        "", // 0x3C
        "", // 0x3D
        "", // 0x3E
        "", // 0x3F
        "", // 0x40
        "A", //A = 0x41,
        "B", //B = 0x42,
        "C", //C = 0x43,
        "D", //D = 0x44,
        "E", //E = 0x45,
        "F", //F = 0x46,
        "G", //G = 0x47,
        "H", //H = 0x48,
        "I", //I = 0x49,
        "J", //J = 0x4A,
        "K", //K = 0x4B,
        "L", //L = 0x4C,
        "M", //M = 0x4D,
        "N", //N = 0x4E,
        "O", //O = 0x4F,
        "P", //P = 0x50,
        "Q", //Q = 0x51,
        "R", //R = 0x52,
        "S", //S = 0x53,
        "T", //T = 0x54,
        "U", //U = 0x55,
        "V", //V = 0x56,
        "W", //W = 0x57,
        "X", //X = 0x58,
        "Y", //Y = 0x59,
        "Z", //Z = 0x5A,
        "Left Windows", //LWIN = 0x5B,
        "Right Windows", //RWIN = 0x5C,
        "Apps", //APPS = 0x5D,
        "", // 0x5E
        "Sleep", //SLEEP = 0x5F,
        "Numpad 0", //NUMPAD0 = 0x60,
        "Numpad 1", //NUMPAD1 = 0x61,
        "Numpad 2", //NUMPAD2 = 0x62,
        "Numpad 3", //NUMPAD3 = 0x63,
        "Numpad 4", //NUMPAD4 = 0x64,
        "Numpad 5", //NUMPAD5 = 0x65,
        "Numpad 6", //NUMPAD6 = 0x66,
        "Numpad 7", //NUMPAD7 = 0x67,
        "Numpad 8", //NUMPAD8 = 0x68,
        "Numpad 9", //NUMPAD9 = 0x69,
        "Numpad *", //MULTIPLY = 0x6A,
        "Numpad +", //ADD = 0x6B,
        "Numpad .", //SEPARATOR = 0x6C,
        "Numpad -", //SUBTRACT = 0x6D,
        "Numpad .", //DECIMAL = 0x6E,
        "Numpad /", //DIVIDE = 0x6F,
        "F1", //F1 = 0x70,
        "F2", //F2 = 0x71,
        "F3", //F3 = 0x72,
        "F4", //F4 = 0x73,
        "F5", //F5 = 0x74,
        "F6", //F6 = 0x75,
        "F7", //F7 = 0x76,
        "F8", //F8 = 0x77,
        "F9", //F9 = 0x78,
        "F10", //F10 = 0x79,
        "F11", //F11 = 0x7A,
        "F12", //F12 = 0x7B,
        "F13", //F13 = 0x7C,
        "F14", //F14 = 0x7D,
        "F15", //F15 = 0x7E,
        "F16", //F16 = 0x7F,
        "F17", //F17 = 0x80,
        "F18", //F18 = 0x81,
        "F19", //F19 = 0x82,
        "F20", //F20 = 0x83,
        "F21", //F21 = 0x84,
        "F22", //F22 = 0x85,
        "F23", //F23 = 0x86,
        "F24", //F24 = 0x87,
        "Navigation View", //NAVIGATION_VIEW = 0x88,
        "Navigation Menu", //NAVIGATION_MENU = 0x89,
        "Navigation Up", //NAVIGATION_UP = 0x8A,
        "Navigation Down", //NAVIGATION_DOWN = 0x8B,
        "Navigation Left", //NAVIGATION_LEFT = 0x8C,
        "Navigation Right", //NAVIGATION_RIGHT = 0x8D,
        "Navigation Accept", //NAVIGATION_ACCEPT = 0x8E,
        "Navigation Cancel", //NAVIGATION_CANCEL = 0x8F,
        "Numlock", //NUMLOCK = 0x90,
        "Scroll lock", //SCROLL = 0x91,
        "=", //OEM_NEC_EQUAL = 0x92,
        "", // 0x93
        "", // 0x94
        "", // 0x95
        "", // 0x96
        "", // 0x97
        "", // 0x98
        "", // 0x99
        "", // 0x9A
        "", // 0x9B
        "", // 0x9C
        "", // 0x9D
        "", // 0x9E
        "", // 0x9F
        "Left Shift", //LSHIFT = 0xA0,
        "Right Shift", //RSHIFT = 0xA1,
        "Left Control", //LCONTROL = 0xA2,
        "Right Control", //RCONTROL = 0xA3,
        "Left Menu", //LMENU = 0xA4,
        "Right Menu", //RMENU = 0xA5,
        "", // 0xA6
        "", // 0xA7
        "", // 0xA8
        "", // 0xA9
        "", // 0xAA
        "", // 0xAB
        "", // 0xAC
        "", // 0xAD
        "", // 0xAE
        "", // 0xAF
        "", // 0xB0
        "", // 0xB1
        "", // 0xB2
        "", // 0xB3
        "", // 0xB4
        "", // 0xB5
        "", // 0xB6
        "", // 0xB7
        "", // 0xB8
        "", // 0xB9
        ";", //SEMICOLON = 0xBA,
        "+", //PLUS = 0xBB,
        ",", //COMMA = 0xBC,
        "-", //MINUS = 0xBD,
        ".", //PERIOD = 0xBE,
        "\\", //FORWARD_SLASH = 0xBF,
        "~", //TILDA = 0xC0,
        "", // 0xC1
        "", // 0xC2
        "", // 0xC3
        "", // 0xC4
        "", // 0xC5
        "", // 0xC6
        "", // 0xC7
        "", // 0xC8
        "", // 0xC9
        "", // 0xCA
        "", // 0xCB
        "", // 0xCC
        "", // 0xCD
        "", // 0xCE
        "", // 0xCF
        "[", //OPEN_BRACKET = 0xDB,
        "/", //BACK_SLASH = 0xDC,
        "]", //CLOSED_BRACKET = 0xDD,
        "\"", //QUOTE = 0xDE
    };
    text::add_line(state, contents, "shortcut_tooltip", text::variable_type::x, key_names[uint8_t(elm.base_data.data.button.shortcut)]);
}
 
} // namespace ui