gui_element_types.hpp

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#pragma once
 
#include "dcon_generated.hpp"
#include "gui_graphics.hpp"
#include "gui_element_base.hpp"
#include "opengl_wrapper.hpp"
#include "sound.hpp"
#include "system_state.hpp"
#include "text.hpp"
#include "texture.hpp"
#include <cstdint>
#include <functional>
#include <unordered_map>
#include <variant>
#include <vector>
 
namespace ui {
 
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
);
 
template<typename T, typename ...Params>
std::unique_ptr<element_base> make_element_by_type(sys::state& state, std::string_view name, Params&&... params) { // also bypasses global creation hooks
    auto it = state.ui_state.defs_by_name.find(state.lookup_key(name));
    if(it != state.ui_state.defs_by_name.end()) {
        auto res = std::make_unique<T>(std::forward<Params>(params)...);
        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 std::unique_ptr<element_base>{};
}
template<typename T, typename ...Params>
std::unique_ptr<T> make_element_by_type(sys::state& state, dcon::gui_def_id id, Params&&... params) { // also bypasses global creation hooks
    auto res = std::make_unique<T>(std::forward<Params>(params)...);
    std::memcpy(&(res->base_data), &(state.ui_defs.gui[id]), sizeof(ui::element_data));
    make_size_from_graphics(state, res->base_data);
    res->on_create(state);
    return res;
}
 
ogl::color_modification get_color_modification(bool is_under_mouse, bool is_disabled, bool is_interactable);
ogl::color3f get_text_color(sys::state& state, text::text_color text_color);
 
class container_base : public element_base {
public:
    std::vector<std::unique_ptr<element_base>> children;
 
    mouse_probe impl_probe_mouse(sys::state& state, int32_t x, int32_t y, mouse_probe_type type) noexcept override;
    message_result impl_on_key_down(sys::state& state, sys::virtual_key key, sys::key_modifiers mods) noexcept final;
    void impl_on_update(sys::state& state) noexcept override;
    message_result impl_set(sys::state& state, Cyto::Any& payload) noexcept final;
    void impl_render(sys::state& state, int32_t x, int32_t y) noexcept override;
    void impl_on_reset_text(sys::state& state) noexcept override;
 
    std::unique_ptr<element_base> remove_child(element_base* child) noexcept final;
    void move_child_to_front(element_base* child) noexcept final;
    void move_child_to_back(element_base* child) noexcept final;
    void add_child_to_front(std::unique_ptr<element_base> child) noexcept final;
    void add_child_to_back(std::unique_ptr<element_base> child) noexcept final;
    element_base* get_child_by_name(sys::state const& state, std::string_view name) noexcept final;
    element_base* get_child_by_index(sys::state const& state, int32_t index) noexcept final;
};
 
class non_owning_container_base : public element_base {
public:
    std::vector<element_base*> children;
 
    mouse_probe impl_probe_mouse(sys::state& state, int32_t x, int32_t y, mouse_probe_type type) noexcept override;
    message_result impl_on_key_down(sys::state& state, sys::virtual_key key, sys::key_modifiers mods) noexcept final;
    void impl_on_update(sys::state& state) noexcept override;
    message_result impl_set(sys::state& state, Cyto::Any& payload) noexcept final;
    void impl_render(sys::state& state, int32_t x, int32_t y) noexcept override;
    void impl_on_reset_text(sys::state& state) noexcept override;
 
    void move_child_to_front(element_base* child) noexcept final;
    void move_child_to_back(element_base* child) noexcept final;
    element_base* get_child_by_index(sys::state const& state, int32_t index) noexcept final;
};
 
class image_element_base : public element_base {
public:
    int32_t frame = 0; // if it is from an icon strip
    bool disabled = false;
    bool interactable = false;
    void render(sys::state& state, int32_t x, int32_t y) noexcept override;
    void on_create(sys::state& state) noexcept override;
 
    virtual bool get_horizontal_flip(sys::state& state) noexcept {
        return state.world.locale_get_native_rtl(state.font_collection.get_current_locale());
    }
 
    message_result test_mouse(sys::state& state, int32_t x, int32_t y, mouse_probe_type type) noexcept override {
        if(has_tooltip(state) == tooltip_behavior::no_tooltip)
            return message_result::unseen;
        return type == mouse_probe_type::tooltip ? message_result::consumed : message_result::unseen;
    }
};
 
class invisible_element : public element_base {
public:
    void on_create(sys::state& state) noexcept override {
        set_visible(state, false);
    }
};
 
class tinted_image_element_base : public image_element_base {
public:
    uint32_t color = 0;
    tinted_image_element_base() : color(0) { }
    tinted_image_element_base(uint32_t c) : color(c) { }
 
    void render(sys::state& state, int32_t x, int32_t y) noexcept override;
};
 
class opaque_element_base : public image_element_base {
public:
    message_result test_mouse(sys::state& state, int32_t x, int32_t y, mouse_probe_type type) noexcept override {
        if(type == mouse_probe_type::click || type == mouse_probe_type::tooltip)
            return message_result::consumed;
        return image_element_base::test_mouse(state, x, y, type);
    }
    message_result on_lbutton_down(sys::state& state, int32_t x, int32_t y, sys::key_modifiers mods) noexcept override {
        return message_result::consumed;
    }
    message_result on_rbutton_down(sys::state& state, int32_t x, int32_t y, sys::key_modifiers mods) noexcept override {
        return message_result::consumed;
    }
    tooltip_behavior has_tooltip(sys::state& state) noexcept override {
        return tooltip_behavior::no_tooltip;
    }
};
 
class partially_transparent_image : public opaque_element_base {
    dcon::texture_id texture_id;
public:
    message_result test_mouse(sys::state& state, int32_t x, int32_t y, mouse_probe_type type) noexcept override {
        if(type == mouse_probe_type::click || type == mouse_probe_type::tooltip) {
            auto& texhandle = state.open_gl.asset_textures[texture_id];
            uint8_t* texture = texhandle.data;
            int32_t size_x = texhandle.size_x;
            int32_t size_y = texhandle.size_y;
            int32_t channels = texhandle.channels;
            size_t size_m = (texhandle.size_x * texhandle.size_y) * 4;
            if(texture && channels == 4) {
                // texture memory layout RGBA accessed through uint8_t pointer
                size_t index = (x + (y * size_x)) * 4 + 3;
                if(index < size_m && texture[index] == 0x00) {
                    return message_result::unseen;
                }
            }
            return message_result::consumed;
        }
        return message_result::unseen;
    }
 
    void on_create(sys::state& state) noexcept override {
        opaque_element_base::on_create(state);
        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) {
            texture_id = state.ui_defs.gfx[gid].primary_texture_handle;
        }
    }
 
    // MAYBE this function has to be changed when make_element_by_type() is changed
    static std::unique_ptr<partially_transparent_image> make_element_by_type_alias(sys::state& state, dcon::gui_def_id id) {
        auto res = std::make_unique<partially_transparent_image>();
        std::memcpy(&(res->base_data), &(state.ui_defs.gui[id]), sizeof(ui::element_data));
 
        dcon::gfx_object_id gfx_handle;
 
        if(res->base_data.get_element_type() == ui::element_type::image) {
            gfx_handle = res->base_data.data.image.gfx_object;
        } else if(res->base_data.get_element_type() == ui::element_type::button) {
            gfx_handle = res->base_data.data.button.button_image;
        }
        if(gfx_handle) {
            auto tex_handle = state.ui_defs.gfx[gfx_handle].primary_texture_handle;
            if(tex_handle) {
                state.ui_defs.gfx[gfx_handle].flags |= ui::gfx_object::do_transparency_check;
            }
        }
 
        make_size_from_graphics(state, res->base_data);
        res->on_create(state);
        return res;
    }
};
 
 
class progress_bar : public opaque_element_base {
public:
    float progress = 0.f;
    void render(sys::state& state, int32_t x, int32_t y) noexcept override;
    message_result test_mouse(sys::state& state, int32_t x, int32_t y, mouse_probe_type type) noexcept override {
        return image_element_base::test_mouse(state, x, y, type);
    }
    message_result on_lbutton_down(sys::state& state, int32_t x, int32_t y, sys::key_modifiers mods) noexcept override {
        return image_element_base::on_lbutton_down(state, x, y, mods);
    }
    message_result on_rbutton_down(sys::state& state, int32_t x, int32_t y, sys::key_modifiers mods) noexcept override {
        return image_element_base::on_rbutton_down(state, x, y, mods);
    }
};
 
class vertical_progress_bar : public progress_bar {
public:
    void on_create(sys::state& state) noexcept override {
        std::swap(base_data.size.x, base_data.size.y);
        base_data.position.x -= base_data.size.x;
        base_data.position.y -= (base_data.size.y - base_data.size.x);
    }
};
 
class button_element_base : public opaque_element_base {
protected:
    text::layout internal_layout;
    std::string cached_text;
    bool black_text = true;
 
public:
    button_element_base() {
        interactable = true;
    }
 
    void set_button_text(sys::state& state, std::string const& new_text);
    void on_reset_text(sys::state& state) noexcept override;
 
    virtual void button_action(sys::state& state) noexcept { }
    virtual void button_right_action(sys::state& state) noexcept {
        button_action(state);
    }
    virtual void button_shift_action(sys::state& state) noexcept {
        button_action(state);
    }
    virtual void button_shift_right_action(sys::state& state) noexcept {
        button_action(state);
    }
    virtual void button_ctrl_action(sys::state& state) noexcept {
        button_action(state);
    }
    virtual void button_ctrl_right_action(sys::state& state) noexcept {
        button_action(state);
    }
    virtual void button_ctrl_shift_action(sys::state& state) noexcept {
        button_action(state);
    }
    virtual void button_ctrl_shift_right_action(sys::state& state) noexcept {
        button_action(state);
    }
    virtual sound::audio_instance& get_click_sound(sys::state& state) noexcept {
        return sound::get_click_sound(state);
    }
 
    message_result on_lbutton_down(sys::state& state, int32_t x, int32_t y, sys::key_modifiers mods) noexcept override {
        if(!state.user_settings.left_mouse_click_hold_and_release && !disabled) {
            sound::play_interface_sound(state, get_click_sound(state), state.user_settings.interface_volume * state.user_settings.master_volume);
            if(mods == sys::key_modifiers::modifiers_shift)
                button_shift_action(state);
            else if(mods == sys::key_modifiers::modifiers_ctrl)
                button_ctrl_action(state);
            else
                button_action(state);
        }
        return message_result::consumed;
    }
    message_result on_rbutton_down(sys::state& state, int32_t x, int32_t y, sys::key_modifiers mods) noexcept override {
        if(!disabled) {
            sound::play_interface_sound(state, get_click_sound(state), state.user_settings.interface_volume * state.user_settings.master_volume);
            if(mods == sys::key_modifiers::modifiers_shift)
                button_shift_right_action(state);
            else if(mods == sys::key_modifiers::modifiers_ctrl)
                button_ctrl_right_action(state);
            else
                button_right_action(state);
        }
        return message_result::consumed;
    }
    message_result on_lbutton_up(sys::state& state, int32_t x, int32_t y, sys::key_modifiers mods, bool under_mouse) noexcept override {
        if(state.user_settings.left_mouse_click_hold_and_release && !disabled && under_mouse) {
            sound::play_interface_sound(state, get_click_sound(state), state.user_settings.interface_volume * state.user_settings.master_volume);
            if(mods == sys::key_modifiers::modifiers_shift)
                button_shift_action(state);
            else if(mods == sys::key_modifiers::modifiers_ctrl)
                button_ctrl_action(state);
            else
                button_action(state);
        }
        return message_result::consumed;
    }
    message_result on_key_down(sys::state& state, sys::virtual_key key, sys::key_modifiers mods) noexcept final {
        if(!disabled && base_data.get_element_type() == element_type::button && base_data.data.button.shortcut == key) {
            sound::play_interface_sound(state, get_click_sound(state), state.user_settings.interface_volume * state.user_settings.master_volume);
            if(mods == sys::key_modifiers::modifiers_shift)
                button_shift_action(state);
            else if(mods == sys::key_modifiers::modifiers_ctrl)
                button_ctrl_action(state);
            else
                button_action(state);
            return message_result::consumed;
        } else {
            return message_result::unseen;
        }
    }
 
    void on_create(sys::state& state) noexcept override;
    void render(sys::state& state, int32_t x, int32_t y) noexcept override;
    void format_text(sys::state& state);
};
 
class tinted_button_element_base : public button_element_base {
public:
    uint32_t color = 0;
    void render(sys::state& state, int32_t x, int32_t y) noexcept override;
};
 
class right_click_button_element_base : public button_element_base {
public:
    virtual void button_right_action(sys::state& state) noexcept override { }
    message_result on_rbutton_down(sys::state& state, int32_t x, int32_t y, sys::key_modifiers mods) noexcept final {
        if(!disabled) {
            sound::play_interface_sound(state, get_click_sound(state), state.user_settings.interface_volume * state.user_settings.master_volume);
            button_right_action(state);
        }
        return message_result::consumed;
    }
};
 
class tinted_right_click_button_element_base : public tinted_button_element_base {
public:
    virtual void button_right_action(sys::state& state) noexcept override { }
    message_result on_rbutton_down(sys::state& state, int32_t x, int32_t y, sys::key_modifiers mods) noexcept final {
        if(!disabled) {
            sound::play_interface_sound(state, get_click_sound(state), state.user_settings.interface_volume * state.user_settings.master_volume);
            button_right_action(state);
        }
        return message_result::consumed;
    }
};
 
class line_graph : public element_base {
private:
    ogl::lines lines;
public:
    bool is_coloured = false;
    float r = 0.f;
    float g = 0.f;
    float b = 0.f;
 
    const uint32_t count;
 
    line_graph(uint32_t sz) : lines(sz), count(sz) {
        is_coloured = false;
        r = 0.f;
        g = 0.f;
        b = 0.f;
    }
 
    void set_data_points(sys::state& state, std::vector<float> const& datapoints) noexcept;
    void set_data_points(sys::state& state, std::vector<float> const& datapoints, float min, float max) noexcept;
    void on_create(sys::state& state) noexcept override;
    void render(sys::state& state, int32_t x, int32_t y) noexcept override;
 
    message_result test_mouse(sys::state& state, int32_t x, int32_t y, mouse_probe_type type) noexcept override {
        if(has_tooltip(state) == tooltip_behavior::no_tooltip)
            return message_result::unseen;
        return type == mouse_probe_type::tooltip ? message_result::consumed : message_result::unseen;
    }
};
 
class simple_text_element_base : public element_base {
protected:
    std::string cached_text;
    text::layout internal_layout;
public:
    bool black_text = true;
    int32_t data = 0;
    int32_t casualties = 0;
 
    void set_text(sys::state& state, std::string const& new_text);
    void on_reset_text(sys::state& state) noexcept override;
    void on_create(sys::state& state) noexcept override;
    void render(sys::state& state, int32_t x, int32_t y) noexcept override;
    void format_text(sys::state& state);
 
    std::string_view get_text(sys::state& state) const {
        return cached_text;
    }
 
    message_result test_mouse(sys::state& state, int32_t x, int32_t y, mouse_probe_type type) noexcept override {
        if(has_tooltip(state) == tooltip_behavior::no_tooltip)
            return message_result::unseen;
        return type == mouse_probe_type::tooltip ? message_result::consumed : message_result::unseen;
    }
};
 
class color_text_element : public simple_text_element_base {
public:
    text::text_color color = text::text_color::black;
    void render(sys::state& state, int32_t x, int32_t y) noexcept override;
};
 
class simple_body_text : public simple_text_element_base {
public:
    void on_create(sys::state& state) noexcept override;
    void set_text(sys::state& state, std::string const& new_text);
    void render(sys::state& state, int32_t x, int32_t y) noexcept override;
    void on_reset_text(sys::state& state) noexcept override;
};
 
class edit_box_element_base : public simple_text_element_base {
protected:
    int32_t edit_index = 0;
 
public:
    virtual void edit_box_tab(sys::state& state, std::string_view s) noexcept { }
    virtual void edit_box_enter(sys::state& state, std::string_view s) noexcept { }
    virtual void edit_box_update(sys::state& state, std::string_view s) noexcept { }
    virtual void edit_box_up(sys::state& state) noexcept { }
    virtual void edit_box_down(sys::state& state) noexcept { }
    virtual void edit_box_esc(sys::state& state) noexcept { }
    virtual void edit_box_backtick(sys::state& state) noexcept { }
    virtual void edit_box_back_slash(sys::state& state) noexcept { }
    virtual void edit_index_position(sys::state& state, int32_t index) noexcept {
        edit_index = index;
    }
    void on_reset_text(sys::state& state) noexcept override;
    void on_create(sys::state& state) noexcept override;
 
    message_result test_mouse(sys::state& state, int32_t x, int32_t y, mouse_probe_type type) noexcept override {
        return message_result::consumed;
    }
    message_result on_lbutton_down(sys::state& state, int32_t x, int32_t y, sys::key_modifiers mods) noexcept override;
    message_result on_key_down(sys::state& state, sys::virtual_key key, sys::key_modifiers mods) noexcept override;
    void on_text(sys::state& state, char32_t ch) noexcept override;
    void render(sys::state& state, int32_t x, int32_t y) noexcept override;
};
 
class tool_tip : public element_base {
public:
    text::layout internal_layout;
    tool_tip() { }
    void render(sys::state& state, int32_t x, int32_t y) noexcept override;
};
 
class draggable_target : public opaque_element_base {
public:
    message_result test_mouse(sys::state& state, int32_t x, int32_t y, mouse_probe_type type) noexcept override {
        if(type == mouse_probe_type::tooltip)
            return message_result::consumed;
        return opaque_element_base::test_mouse(state, x, y, type);
    }
    message_result on_lbutton_down(sys::state& state, int32_t x, int32_t y, sys::key_modifiers mods) noexcept override;
};
 
class window_element_base : public container_base {
public:
    virtual std::unique_ptr<element_base> make_child(sys::state& state, std::string_view name, dcon::gui_def_id id) noexcept {
        return nullptr;
    }
    void on_create(sys::state& state) noexcept override;
    void on_drag(sys::state& state, int32_t oldx, int32_t oldy, int32_t x, int32_t y, sys::key_modifiers mods) noexcept override;
 
    message_result test_mouse(sys::state& state, int32_t x, int32_t y, mouse_probe_type type) noexcept override {
        if(has_tooltip(state) == tooltip_behavior::no_tooltip)
            return message_result::unseen;
        return type == mouse_probe_type::tooltip ? message_result::consumed : message_result::unseen;
    }
};
 
template<class TabT>
class generic_tabbed_window : public window_element_base {
public:
    TabT active_tab = TabT();
    message_result test_mouse(sys::state& state, int32_t x, int32_t y, mouse_probe_type type) noexcept override {
        return message_result::consumed;
    }
};
 
class generic_close_button : public button_element_base {
public:
    void button_action(sys::state& state) noexcept override {
        if(parent) {
            parent->set_visible(state, false);
        }
    }
};
 
class checkbox_button : public button_element_base {
public:
    virtual bool is_active(sys::state& state) noexcept {
        return false;
    }
 
    sound::audio_instance& get_click_sound(sys::state& state) noexcept override {
        return sound::get_checkbox_sound(state);
    }
 
    void render(sys::state& state, int32_t x, int32_t y) noexcept override {
        frame = int32_t(is_active(state));
        button_element_base::render(state, x, y);
    }
};
 
template<class RowConT>
class wrapped_listbox_row_content {
public:
    RowConT content;
    wrapped_listbox_row_content() {
        content = RowConT{};
    }
    wrapped_listbox_row_content(RowConT con) {
        content = con;
    }
};
 
template<class ItemWinT, class ItemConT>
class overlapping_listbox_element_base : public window_element_base {
private:
    int16_t subwindow_width = 0;
 
protected:
    std::vector<ItemWinT*> windows{};
 
    virtual std::string_view get_row_element_name() {
        return std::string_view{};
    }
 
    virtual void update_subwindow(sys::state& state, ItemWinT& subwindow, ItemConT content) {
        send(state, &subwindow, wrapped_listbox_row_content<ItemConT>(content));
        subwindow.impl_on_update(state);
    }
 
public:
    std::vector<ItemConT> row_contents{};
    void update(sys::state& state);
};
 
class province_script_button : public button_element_base {
public:
    dcon::gui_def_id base_definition;
 
    province_script_button(dcon::gui_def_id base_definition) : base_definition(base_definition) { }
    void button_action(sys::state& state) noexcept override;
    void on_update(sys::state& state) noexcept override;
    tooltip_behavior has_tooltip(sys::state& state) noexcept override {
        return tooltip_behavior::variable_tooltip;
    }
    void update_tooltip(sys::state& state, int32_t x, int32_t y, text::columnar_layout& contents) noexcept override;
};
class nation_script_button : public button_element_base {
public:
    dcon::gui_def_id base_definition;
 
    nation_script_button(dcon::gui_def_id base_definition) : base_definition(base_definition) { }
    void button_action(sys::state& state) noexcept override;
    void on_update(sys::state& state) noexcept override;
    tooltip_behavior has_tooltip(sys::state& state) noexcept override {
        return tooltip_behavior::variable_tooltip;
    }
    void update_tooltip(sys::state& state, int32_t x, int32_t y, text::columnar_layout& contents) noexcept override;
};
 
class flag_button : public button_element_base {
protected:
    GLuint flag_texture_handle = 0;
 
public:
    virtual dcon::national_identity_id get_current_nation(sys::state& state) noexcept;
    virtual dcon::rebel_faction_id get_current_rebel_faction(sys::state& state) noexcept;
    virtual void set_current_nation(sys::state& state, dcon::national_identity_id identity) noexcept;
    void button_action(sys::state& state) noexcept override;
    void on_update(sys::state& state) noexcept override;
    void on_create(sys::state& state) noexcept override;
    void render(sys::state& state, int32_t x, int32_t y) noexcept override;
    tooltip_behavior has_tooltip(sys::state& state) noexcept override {
        return tooltip_behavior::variable_tooltip;
    }
    void update_tooltip(sys::state& state, int32_t x, int32_t y, text::columnar_layout& contents) noexcept override;
};
 
class flag_button2 : public button_element_base {
public:
    GLuint flag_texture_handle = 0;
 
    void button_action(sys::state& state) noexcept override;
    void on_update(sys::state& state) noexcept override;
    void render(sys::state& state, int32_t x, int32_t y) noexcept override;
    tooltip_behavior has_tooltip(sys::state& state) noexcept override {
        return tooltip_behavior::variable_tooltip;
    }
    void update_tooltip(sys::state& state, int32_t x, int32_t y, text::columnar_layout& contents) noexcept override;
};
 
class overlapping_flags_flag_button : public flag_button {
private:
    dcon::national_identity_id stored_identity{};
 
public:
    dcon::national_identity_id get_current_nation(sys::state& state) noexcept override {
        return stored_identity;
    }
    void set_current_nation(sys::state& state, dcon::national_identity_id identity) noexcept override {
        stored_identity = identity;
        flag_button::set_current_nation(state, identity);
    }
    tooltip_behavior has_tooltip(sys::state& state) noexcept override {
        return tooltip_behavior::variable_tooltip;
    }
};
 
class overlapping_flags_box : public overlapping_listbox_element_base<overlapping_flags_flag_button, dcon::national_identity_id> {
protected:
    dcon::nation_id current_nation{};
 
    virtual void populate_flags(sys::state& state) { }
 
public:
    std::string_view get_row_element_name() override;
    void update_subwindow(sys::state& state, overlapping_flags_flag_button& subwindow, dcon::national_identity_id content) override;
    void on_update(sys::state& state) noexcept override;
};
 
class overlapping_sphere_flags : public overlapping_flags_box {
protected:
    void populate_flags(sys::state& state) override;
};
 
class overlapping_friendly_flags : public overlapping_flags_box {
protected:
    void populate_flags(sys::state& state) override;
};
 
class overlapping_cordial_flags : public overlapping_flags_box {
protected:
    void populate_flags(sys::state& state) override;
};
 
class overlapping_puppet_flags : public overlapping_flags_box {
protected:
    void populate_flags(sys::state& state) override;
};
 
class overlapping_ally_flags : public overlapping_flags_box {
protected:
    void populate_flags(sys::state& state) override;
};
 
class overlapping_enemy_flags : public overlapping_flags_box {
protected:
    void populate_flags(sys::state& state) override;
};
 
 
class overlapping_truce_flag_button : public flag_button {
public:
    dcon::nation_id n;
    sys::date until;
 
    void upate_truce(sys::state& state, dcon::nation_id i, sys::date u) {
        n = i;
        until = u;
    }
    dcon::national_identity_id get_current_nation(sys::state& state) noexcept override {
        return state.world.nation_get_identity_from_identity_holder(n);
    }
    tooltip_behavior has_tooltip(sys::state& state) noexcept override {
        return tooltip_behavior::variable_tooltip;
    }
    void update_tooltip(sys::state& state, int32_t x, int32_t y, text::columnar_layout& contents) noexcept override;
};
 
struct truce_pair {
    dcon::nation_id n;
    sys::date until;
};
 
class overlapping_truce_flags : public overlapping_listbox_element_base<overlapping_truce_flag_button, truce_pair> {
public:
    dcon::nation_id current_nation{};
    std::string_view get_row_element_name() override;
    void update_subwindow(sys::state& state, overlapping_truce_flag_button& subwindow, truce_pair content) override;
    void on_update(sys::state& state) noexcept override;
};
 
template<class TabT>
class generic_tab_button : public checkbox_button {
public:
    sound::audio_instance& get_click_sound(sys::state& state) noexcept override {
        return sound::get_subtab_sound(state);
    }
 
    bool is_active(sys::state& state) noexcept final {
        return parent && static_cast<generic_tabbed_window<TabT>*>(parent)->active_tab == target;
    }
 
    void button_action(sys::state& state) noexcept final {
        send(state, parent, target);
    }
 
    TabT target = TabT();
};
 
template<class TabT>
class generic_opaque_checkbox_button : public checkbox_button {
public:
    bool is_active(sys::state& state) noexcept final {
        return parent && static_cast<generic_tabbed_window<TabT>*>(parent)->active_tab == target;
    }
 
    void button_action(sys::state& state) noexcept final {
        send(state, parent, target);
    }
 
    void on_create(sys::state& state) noexcept final{};
 
    TabT target = TabT();
};
 
template<class T>
class piechart : public element_base {
public:
 
    static constexpr int32_t resolution = 200;
    static constexpr size_t channels = 3;
    
    struct entry {
        float value;
        T key;
        uint8_t slices;
        entry(T key, float value) : value(value), key(key), slices(0) { }
        entry() : value(0.0f), key(), slices(0) { }
    };
 
    ogl::data_texture data_texture{ resolution, channels };
    std::vector<entry> distribution;
    float radius = 0.f;
 
    void update_chart(sys::state& state);
 
    void on_create(sys::state& state) noexcept override;
    void render(sys::state& state, int32_t x, int32_t y) noexcept override;
    void update_tooltip(sys::state& state, int32_t x, int32_t y, text::columnar_layout& contents) noexcept override;
    virtual void populate_tooltip(sys::state& state, T t, float percentage, text::columnar_layout& contents) noexcept;
 
    tooltip_behavior has_tooltip(sys::state& state) noexcept override {
        return tooltip_behavior::position_sensitive_tooltip;
    }
    message_result test_mouse(sys::state& state, int32_t x, int32_t y, mouse_probe_type type) noexcept override {
        if(type == mouse_probe_type::scroll)
            return message_result::unseen;
 
        float dx = float(x) - radius;
        float dy = float(y) - radius;
        auto dist = sqrt(dx * dx + dy * dy);
        return dist <= radius ? message_result::consumed : message_result::unseen;
    }
    message_result on_lbutton_down(sys::state& state, int32_t x, int32_t y, sys::key_modifiers mods) noexcept override {
        return message_result::consumed;
    }
    message_result on_rbutton_down(sys::state& state, int32_t x, int32_t y, sys::key_modifiers mods) noexcept override {
        return message_result::consumed;
    }
};
 
template<class SrcT, class DemoT>
class demographic_piechart : public piechart<DemoT> {
public:
    void on_update(sys::state& state) noexcept override;
    virtual void for_each_demo(sys::state& state, std::function<void(DemoT)> fun) { }
};
 
template<class SrcT>
class culture_piechart : public demographic_piechart<SrcT, dcon::culture_id> {
protected:
    void for_each_demo(sys::state& state, std::function<void(dcon::culture_id)> fun) override {
        state.world.for_each_culture(fun);
    }
};
 
template<class SrcT>
class workforce_piechart : public demographic_piechart<SrcT, dcon::pop_type_id> {
protected:
    void for_each_demo(sys::state& state, std::function<void(dcon::pop_type_id)> fun) override {
        state.world.for_each_pop_type(fun);
    }
};
 
template<class SrcT>
class ideology_piechart : public demographic_piechart<SrcT, dcon::ideology_id> {
protected:
    void for_each_demo(sys::state& state, std::function<void(dcon::ideology_id)> fun) override {
        state.world.for_each_ideology(fun);
    }
};
 
class scrollbar_left : public button_element_base {
public:
    int32_t step_size = 1;
    sound::audio_instance& get_click_sound(sys::state& state) noexcept override {
        return sound::get_click_left_sound(state);
    }
    void button_action(sys::state& state) noexcept final;
    void button_shift_action(sys::state& state) noexcept final;
    void button_shift_right_action(sys::state& state) noexcept final;
    message_result set(sys::state& state, Cyto::Any& payload) noexcept final;
    tooltip_behavior has_tooltip(sys::state& state) noexcept override {
        return tooltip_behavior::variable_tooltip;
    }
    void update_tooltip(sys::state& state, int32_t x, int32_t y, text::columnar_layout& contents) noexcept override {
        auto box = text::open_layout_box(contents, 0);
        text::substitution_map sub;
        text::add_to_substitution_map(sub, text::variable_type::value, step_size);
        text::add_to_substitution_map(sub, text::variable_type::x, step_size * 5);
        text::localised_format_box(state, contents, box, std::string_view("alice_slider_controls"), sub);
        text::close_layout_box(contents, box);
    }
};
 
class scrollbar_right : public button_element_base {
public:
    int32_t step_size = 1;
    sound::audio_instance& get_click_sound(sys::state& state) noexcept override {
        return sound::get_click_right_sound(state);
    }
    void button_action(sys::state& state) noexcept final;
    void button_shift_action(sys::state& state) noexcept final;
    void button_shift_right_action(sys::state& state) noexcept final;
    message_result set(sys::state& state, Cyto::Any& payload) noexcept final;
    tooltip_behavior has_tooltip(sys::state& state) noexcept override {
        return tooltip_behavior::variable_tooltip;
    }
    void update_tooltip(sys::state& state, int32_t x, int32_t y, text::columnar_layout& contents) noexcept override {
        auto box = text::open_layout_box(contents, 0);
        text::substitution_map sub;
        text::add_to_substitution_map(sub, text::variable_type::value, step_size);
        text::add_to_substitution_map(sub, text::variable_type::x, step_size * 5);
        text::localised_format_box(state, contents, box, std::string_view("alice_slider_controls_2"), sub);
        text::close_layout_box(contents, box);
    }
};
 
class scrollbar_track : public opaque_element_base {
public:
    message_result on_lbutton_down(sys::state& state, int32_t x, int32_t y, sys::key_modifiers mods) noexcept final;
    tooltip_behavior has_tooltip(sys::state& state) noexcept final;
    void update_tooltip(sys::state& state, int32_t x, int32_t y, text::columnar_layout& contents) noexcept final;
};
 
class scrollbar_slider : public opaque_element_base {
public:
    message_result on_lbutton_down(sys::state& state, int32_t x, int32_t y, sys::key_modifiers mods) noexcept final;
    void on_drag(sys::state& state, int32_t oldx, int32_t oldy, int32_t x, int32_t y, sys::key_modifiers mods) noexcept final;
    void on_drag_finish(sys::state& state) noexcept final;
};
 
struct mutable_scrollbar_settings {
    int32_t lower_value = 0;
    int32_t upper_value = 100;
    int32_t lower_limit = 0;
    int32_t upper_limit = 0;
    bool using_limits = false;
};
 
struct scrollbar_settings {
    int32_t lower_value = 0;
    int32_t upper_value = 100;
    int32_t lower_limit = 0;
    int32_t upper_limit = 0;
 
    int32_t buttons_size = 20;
    int32_t track_size = 180;
    int32_t scaling_factor = 0;
 
    bool using_limits = false;
    bool vertical = false;
};
 
struct value_change {
    int32_t new_value = 0;
    bool move_slider = false;
    bool is_relative = false;
};
 
class scrollbar : public container_base {
 
protected:
    scrollbar_left* left = nullptr;
    scrollbar_right* right = nullptr;
    scrollbar_slider* slider = nullptr;
 
public:
    image_element_base* left_limit = nullptr;
    image_element_base* right_limit = nullptr;
    int32_t stored_value = 0;
 
    scrollbar_settings settings;
 
    scrollbar_track* track = nullptr;
    virtual void on_value_change(sys::state& state, int32_t v) noexcept { }
 
    void update_raw_value(sys::state& state, int32_t v);
    void update_scaled_value(sys::state& state, float v);
 
    float scaled_value() const;
    int32_t raw_value() const;
 
    void change_settings(sys::state& state, mutable_scrollbar_settings const& settings_s);
 
    void on_create(sys::state& state) noexcept override;
    message_result get(sys::state& state, Cyto::Any& payload) noexcept final;
};
 
class multiline_text_element_base : public element_base {
public:
    float line_height = 0.f;
    int32_t current_line = 0;
    int32_t visible_lines = 0;
    bool black_text = true;
    text::layout internal_layout;
 
    void on_create(sys::state& state) noexcept override;
    void on_reset_text(sys::state& state) noexcept override;
    void render(sys::state& state, int32_t x, int32_t y) noexcept override;
    message_result on_lbutton_down(sys::state& state, int32_t x, int32_t y, sys::key_modifiers mods) noexcept override;
    message_result on_rbutton_down(sys::state& state, int32_t x, int32_t y, sys::key_modifiers mods) noexcept override;
    message_result test_mouse(sys::state& state, int32_t x, int32_t y, mouse_probe_type type) noexcept override;
};
 
class multiline_button_element_base : public button_element_base {
public:
    float line_height = 0.f;
    int32_t current_line = 0;
    int32_t visible_lines = 0;
 
    void on_reset_text(sys::state& state) noexcept override;
    void on_create(sys::state& state) noexcept override;
    void render(sys::state& state, int32_t x, int32_t y) noexcept override;
};
 
struct multiline_text_scroll_event {
    int32_t new_value;
};
 
class autoscaling_scrollbar : public scrollbar {
public:
    void on_create(sys::state& state) noexcept override;
    void scale_to_parent();
};
 
class multiline_text_scrollbar : public autoscaling_scrollbar {
public:
    void on_value_change(sys::state& state, int32_t v) noexcept override;
};
 
class scrollable_text : public window_element_base {
protected:
    multiline_text_scrollbar* text_scrollbar = nullptr;
 
public:
    multiline_text_element_base* delegate = nullptr;
    void on_create(sys::state& state) noexcept override;
    message_result get(sys::state& state, Cyto::Any& payload) noexcept override;
    void calibrate_scrollbar(sys::state& state) noexcept;
    message_result on_scroll(sys::state& state, int32_t x, int32_t y, float amount, sys::key_modifiers mods) noexcept override;
    message_result test_mouse(sys::state& state, int32_t x, int32_t y, mouse_probe_type type) noexcept override {
        if(type == mouse_probe_type::scroll)
            return message_result::consumed;
        return window_element_base::test_mouse(state, x, y, type);
    }
};
 
class single_multiline_text_element_base : public multiline_text_element_base {
public:
    dcon::text_key text_id{};
 
    void on_update(sys::state& state) noexcept override {
        auto layout = text::create_endless_layout(state, 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, text::alignment::left, black_text ? text::text_color::black : text::text_color::white, false});
        auto box = text::open_layout_box(layout, 0);
        text::add_to_layout_box(state, layout, box, text_id);
        text::close_layout_box(layout, box);
    }
};
 
template<class RowWinT, class RowConT>
class standard_listbox_scrollbar : public autoscaling_scrollbar {
public:
    void on_value_change(sys::state& state, int32_t v) noexcept override;
};
 
template<class RowConT>
class listbox_row_element_base : public window_element_base {
protected:
    RowConT content{};
 
public:
    message_result get(sys::state& state, Cyto::Any& payload) noexcept override;
};
 
template<class RowConT>
class listbox_row_button_base : public button_element_base {
protected:
    RowConT content{};
 
public:
    virtual void update(sys::state& state) noexcept { }
    message_result get(sys::state& state, Cyto::Any& payload) noexcept override;
};
 
template<class RowWinT, class RowConT>
class listbox_element_base : public container_base {
protected:
    std::vector<RowWinT*> row_windows{};
 
    virtual std::string_view get_row_element_name() {
        return std::string_view{};
    }
    virtual bool is_reversed() {
        return false;
    }
 
public:
    standard_listbox_scrollbar<RowWinT, RowConT>* list_scrollbar = nullptr;
    std::vector<RowConT> row_contents{};
 
    void update(sys::state& state);
    message_result on_scroll(sys::state& state, int32_t x, int32_t y, float amount, sys::key_modifiers mods) noexcept override;
    void on_create(sys::state& state) noexcept override;
    void render(sys::state& state, int32_t x, int32_t y) noexcept override;
    void scroll_to_bottom(sys::state& state);
    message_result test_mouse(sys::state& state, int32_t x, int32_t y, mouse_probe_type type) noexcept override {
        return (type == mouse_probe_type::scroll && row_contents.size() > row_windows.size()) ? message_result::consumed : message_result::unseen;
    }
};
 
class listbox2_scrollbar : public autoscaling_scrollbar {
public:
    void on_value_change(sys::state& state, int32_t v) noexcept override;
};
 
class listbox2_row_element : public window_element_base {
public:
    message_result get(sys::state& state, Cyto::Any& payload) noexcept override;
};
 
struct listbox2_scroll_event {
};
struct listbox2_row_view {
    listbox2_row_element* row = nullptr;
};
 
template<typename contents_type>
class listbox2_base : public container_base {
public:
    std::vector<ui::element_base*> row_windows{};
    listbox2_scrollbar* list_scrollbar = nullptr;
    int32_t stored_index = 0;
    int32_t visible_row_count = 0;
    bool scrollbar_is_internal = false;
 
    listbox2_base() { }
    listbox2_base(bool scrollbar_is_internal) : scrollbar_is_internal(scrollbar_is_internal) { }
 
    virtual std::unique_ptr<element_base> make_row(sys::state& state) noexcept = 0;
 
    std::vector<contents_type> row_contents;
 
    message_result on_scroll(sys::state& state, int32_t x, int32_t y, float amount, sys::key_modifiers mods) noexcept override;
    void on_update(sys::state& state) noexcept override;
    message_result get(sys::state& state, Cyto::Any& payload) noexcept override;
 
    void on_create(sys::state& state) noexcept override;
    void render(sys::state& state, int32_t x, int32_t y) noexcept override;
 
    void resize(sys::state& state, int32_t height);
 
    message_result test_mouse(sys::state& state, int32_t x, int32_t y, mouse_probe_type type) noexcept override {
        return (type == mouse_probe_type::scroll && row_contents.size() > row_windows.size()) ? message_result::consumed : message_result::unseen;
    }
};
 
template<typename T>
struct element_selection_wrapper {
    T data{};
};
 
void populate_shortcut_tooltip(sys::state& state, ui::element_base& elm, text::columnar_layout& contents) noexcept;
 
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
);
 
} // namespace ui