Move dropdown button text and icon code to dropdown button class

1 files changed, 181 insertions, 0 deletions

diff --git a/src/gui/DropdownButton.cpp b/src/gui/DropdownButton.cpp
new file mode 100644
index 0000000..9610e26
--- /dev/null
+++ b/src/gui/DropdownButton.cpp
@@ -0,0 +1,181 @@
+#include "../../include/gui/DropdownButton.hpp"
+#include "../../include/gui/Utils.hpp"
+#include "../../include/Theme.hpp"
+#include <mglpp/graphics/Rectangle.hpp>
+#include <mglpp/graphics/Texture.hpp>
+#include <mglpp/window/Window.hpp>
+#include <mglpp/window/Event.hpp>
+#include <mglpp/system/FloatRect.hpp>
+
+namespace gsr {
+    static const float padding_top = 10.0f;
+    static const float padding_bottom = 10.0f;
+    static const float padding_left = 10.0f;
+    static const float padding_right = 10.0f;
+    static const int border_size = 5;
+
+    DropdownButton::DropdownButton(mgl::Font *title_font, mgl::Font *description_font, const char *title, const char *description_activated, const char *description_deactivated, mgl::Texture *icon_texture, mgl::vec2f size) :
+        title_font(title_font), description_font(description_font), size(size), title(title, *title_font), description(description_deactivated, *description_font),
+        description_activated(description_activated), description_deactivated(description_deactivated)
+    {
+        if(icon_texture && icon_texture->is_valid()) {
+            icon_sprite.set_texture(icon_texture);
+            icon_sprite.set_height((int)(size.y * 0.5f));
+        }
+        this->description.set_color(mgl::Color(150, 150, 150));
+    }
+
+    bool DropdownButton::on_event(mgl::Event &event, mgl::Window&) {
+        if(event.type == mgl::Event::MouseMoved) {
+            const mgl::vec2f collision_margin(1.0f, 1.0f); // Makes sure that multiple buttons that are next to each other wont activate at the same time when the cursor is right between them
+            const bool inside = mgl::FloatRect(position + collision_margin, size - collision_margin).contains({ (float)event.mouse_move.x, (float)event.mouse_move.y });
+            if(mouse_inside && !inside) {
+                mouse_inside = false;
+            } else if(!mouse_inside && inside) {
+                mouse_inside = true;
+            }
+        } else if(event.type == mgl::Event::MouseButtonPressed) {
+            const bool clicked_inside = mouse_inside;
+            show_dropdown = clicked_inside;
+            if(on_click && mouse_inside_item >= 0 && mouse_inside_item < (int)items.size())
+                on_click(items[mouse_inside_item].id);
+        }
+        return true;
+    }
+
+    void DropdownButton::draw(mgl::Window &window) {
+        update_if_dirty();
+
+        if(show_dropdown) {
+            // Background
+            {
+                mgl::Rectangle rect(size);
+                rect.set_position(position);
+                rect.set_color(mgl::Color(0, 0, 0, 255));
+                window.draw(rect);
+            }
+
+            const mgl::Color border_color = gsr::get_theme().tint_color;
+
+            // Green line at top
+            {
+                mgl::Rectangle rect({ size.x, border_size });
+                rect.set_position(position);
+                rect.set_color(border_color);
+                window.draw(rect);
+            }
+        } else if(mouse_inside) {
+            // Background
+            {
+                mgl::Rectangle rect(size);
+                rect.set_position(position);
+                rect.set_color(mgl::Color(0, 0, 0, 255));
+                window.draw(rect);
+            }
+
+            const mgl::Color border_color = gsr::get_theme().tint_color;
+            draw_rectangle_outline(window, position, size, border_color, border_size);
+        } else {
+            // Background
+            mgl::Rectangle rect(size);
+            rect.set_position(position);
+            rect.set_color(mgl::Color(0, 0, 0, 220));
+            window.draw(rect);
+        }
+
+        const int text_margin = size.y * 0.085;
+
+        const auto title_bounds = title.get_bounds();
+        title.set_position((position + mgl::vec2f(size.x * 0.5f - title_bounds.size.x * 0.5f, text_margin)).floor());
+        window.draw(title);
+
+        const auto description_bounds = description.get_bounds();
+        description.set_position((position + mgl::vec2f(size.x * 0.5f - description_bounds.size.x * 0.5f, size.y - description_bounds.size.y - text_margin)).floor());
+        window.draw(description);
+
+        if(icon_sprite.get_texture()->is_valid()) {
+            icon_sprite.set_position((position + size * 0.5f - icon_sprite.get_size() * 0.5f).floor());
+            window.draw(icon_sprite);
+        }
+
+        mouse_inside_item = -1;
+        if(show_dropdown) {
+            const mgl::vec2i mouse_pos = window.get_mouse_position();
+
+            mgl::Rectangle dropdown_bg(max_size);
+            dropdown_bg.set_position(position + mgl::vec2f(0.0f, size.y));
+            dropdown_bg.set_color(mgl::Color(0, 0, 0));
+            window.draw(dropdown_bg);
+
+            mgl::vec2f item_position = dropdown_bg.get_position();
+            for(size_t i = 0; i < items.size(); ++i) {
+                auto &item = items[i];
+                const auto text_bounds = item.text.get_bounds();
+                const float item_height = padding_top + text_bounds.size.y + padding_bottom;
+
+                if(mouse_inside_item == -1) {
+                    const mgl::vec2f item_size(max_size.x, item_height);
+                    const bool inside = mgl::FloatRect(item_position, item_size).contains({ (float)mouse_pos.x, (float)mouse_pos.y });
+                    if(inside) {
+                        draw_rectangle_outline(window, item_position, item_size, gsr::get_theme().tint_color, 5);
+                        mouse_inside_item = i;
+                    }
+                }
+
+                item.text.set_position((item_position + mgl::vec2f(padding_left, item_height * 0.5f - text_bounds.size.y * 0.5f)).floor());
+                window.draw(item.text);
+                item_position.y += item_height;
+            }
+        }
+    }
+
+    void DropdownButton::add_item(const std::string &text, const std::string &id) {
+        items.push_back({mgl::Text(text, *title_font), id});
+        dirty = true;
+    }
+
+    void DropdownButton::set_item_label(const std::string &id, const std::string &new_label) {
+        for(auto &item : items) {
+            if(item.id == id) {
+                item.text.set_string(new_label);
+                dirty = true;
+                return;
+            }
+        }
+    }
+
+    void DropdownButton::set_activated(bool activated) {
+        if(this->activated == activated)
+            return;
+
+        this->activated = activated;
+
+        if(activated) {
+            description = mgl::Text(description_activated, *description_font);
+            description.set_color(get_theme().tint_color);
+            icon_sprite.set_color(get_theme().tint_color);
+        } else {
+            description = mgl::Text(description_deactivated, *description_font);
+            description.set_color(mgl::Color(150, 150, 150));
+            icon_sprite.set_color(mgl::Color(255, 255, 255));
+        }
+    }
+
+    void DropdownButton::update_if_dirty() {
+        if(!dirty)
+            return;
+
+        max_size = { size.x, 0.0f };
+        for(Item &item : items) {
+            const mgl::vec2f bounds = item.text.get_bounds().size;
+            max_size.x = std::max(max_size.x, bounds.x + padding_left + padding_right);
+            max_size.y += bounds.y + padding_top + padding_bottom;
+        }
+        dirty = false;
+    }
+
+    mgl::vec2f DropdownButton::get_size() {
+        update_if_dirty();
+        return size;
+    }
+}
\ No newline at end of file