widgets

include/gui/Button.hpp

@@ -8,9 +8,14 @@ namespace gsr {
     class Button : public Widget {
     public:
         Button(mgl::vec2f size);
-        void on_event(mgl::Event &event, mgl::Window &window) override;
+        Button(const Button&) = delete;
+        Button& operator=(const Button&) = delete;
+
+        bool on_event(mgl::Event &event, mgl::Window &window) override;
         void draw(mgl::Window &window) override;
 
+        mgl::vec2f get_size() const { return size; }
+
         std::function<void()> on_click;
     private:
         mgl::vec2f size;

include/gui/ComboBox.hpp

@@ -0,0 +1,36 @@
+#pragma once
+
+#include "Widget.hpp"
+#include <mglpp/graphics/Text.hpp>
+#include <string>
+#include <vector>
+
+namespace gsr {
+    class ComboBox : public Widget {
+    public:
+        ComboBox(mgl::Font *font);
+        ComboBox(const ComboBox&) = delete;
+        ComboBox& operator=(const ComboBox&) = delete;
+
+        bool on_event(mgl::Event &event, mgl::Window &window) override;
+        void draw(mgl::Window &window) override;
+
+        void add_item(const std::string &text, const std::string &id);
+
+        mgl::vec2f get_size();
+    private:
+        void update_if_dirty();
+    private:
+        struct Item {
+            mgl::Text text;
+            std::string id;
+        };
+
+        mgl::vec2f max_size;
+        mgl::Font *font;
+        std::vector<Item> items;
+        bool dirty = true;
+        bool show_dropdown = false;
+        size_t selected_item = 0;
+    };
+}

include/gui/Widget.hpp

@@ -9,13 +9,21 @@ namespace mgl {
 
 namespace gsr {
     class Widget {
+        friend class WidgetContainer;
     public:
-        virtual ~Widget() = default;
+        Widget();
+        Widget(const Widget&) = delete;
+        Widget& operator=(const Widget&) = delete;
+        virtual ~Widget();
 
-        virtual void on_event(mgl::Event &event, mgl::Window &window) = 0;
+        // Return true to allow other widgets to also process the event
+        virtual bool on_event(mgl::Event &event, mgl::Window &window) = 0;
         virtual void draw(mgl::Window &window) = 0;
         virtual void set_position(mgl::vec2f position);
+
+        virtual mgl::vec2f get_position() const;
     protected:
         mgl::vec2f position;
+        bool move_to_top = false;
     };
 }

include/gui/WidgetContainer.hpp

@@ -0,0 +1,30 @@
+#pragma once
+
+#include <vector>
+#include <memory>
+
+namespace mgl {
+    class Event;
+    class Window;
+}
+
+namespace gsr {
+    class Widget;
+
+    class WidgetContainer {
+    public:
+        static WidgetContainer& get_instance();
+
+        void add_widget(Widget *widget);
+        void remove_widget(Widget *widget);
+
+        void on_event(mgl::Event &event, mgl::Window &window);
+        void draw(mgl::Window &window);
+    private:
+        WidgetContainer() = default;
+        WidgetContainer& operator=(const WidgetContainer&) = delete;
+        WidgetContainer(const WidgetContainer&) = delete;
+    private:
+        std::vector<Widget*> widgets;
+    };
+}