Start on file chooser, page stack

include/gui/FileChooser.hpp

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+#pragma once
+
+#include "Widget.hpp"
+#include <functional>
+#include <vector>
+
+#include <mglpp/graphics/Text.hpp>
+#include <mglpp/system/Clock.hpp>
+
+// This currently only supports displaying folders
+// TODO: Support files as well
+
+namespace gsr {
+    class FileChooser : public Widget {
+    public:
+        FileChooser(const char *start_directory, mgl::vec2f content_size);
+        FileChooser(const FileChooser&) = delete;
+        FileChooser& operator=(const FileChooser&) = delete;
+
+        bool on_event(mgl::Event &event, mgl::Window &window, mgl::vec2f offset) override;
+        void draw(mgl::Window &window, mgl::vec2f offset) override;
+
+        mgl::vec2f get_size() override;
+
+        void set_current_directory(const char *directory);
+    private:
+        mgl::vec2f content_size;
+        mgl::Text current_directory_text;
+        int mouse_over_item = -1;
+        int selected_item = -1;
+        std::vector<mgl::Text> folders;
+        mgl::Clock double_click_timer;
+        int times_clicked_within_timer = 0;
+    };
+}