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#pragma once
#include <mglpp/system/vec.hpp>
namespace mgl {
class Event;
class Window;
}
namespace gsr {
class Widget {
friend class StaticPage;
friend class ScrollablePage;
friend class List;
friend class Page;
public:
enum class Alignment {
START,
CENTER,
END
};
Widget();
Widget(const Widget&) = delete;
Widget& operator=(const Widget&) = delete;
virtual ~Widget();
// Return true to allow other widgets to also process the event
virtual bool on_event(mgl::Event &event, mgl::Window &window, mgl::vec2f offset) = 0;
virtual void draw(mgl::Window &window, mgl::vec2f offset) = 0;
virtual void set_position(mgl::vec2f position);
//virtual void remove_child_widget(Widget *widget) { (void)widget; }
virtual mgl::vec2f get_position() const;
virtual mgl::vec2f get_size() = 0;
// This can be different from get_size, for example with ScrollablePage this excludes the margins
virtual mgl::vec2f get_inner_size() { return get_size(); }
void set_horizontal_alignment(Alignment alignment);
void set_vertical_alignment(Alignment alignment);
Alignment get_horizontal_alignment() const;
Alignment get_vertical_alignment() const;
void set_visible(bool visible);
protected:
void set_widget_as_selected_in_parent();
void remove_widget_as_selected_in_parent();
bool has_parent_with_selected_child_widget() const;
protected:
mgl::vec2f position;
Widget *parent_widget = nullptr;
Widget *selected_child_widget = nullptr;
Alignment horizontal_aligment = Alignment::START;
Alignment vertical_aligment = Alignment::START;
bool visible = true;
};
}
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