BansheeEngine/BansheeEditor/Include/BsGUIWindowFrameWidget.h

#pragma once

#include "BsEditorPrerequisites.h"
#include "BsGUIWidget.h"
#include "BsEvent.h"

namespace BansheeEngine
{
	/**
	 * @brief	A GUIWidget specialization that when attached to a window will
	 *			create a window border, window background and provide resize
	 *			functionality.
	 */
	class WindowFrameWidget : public GUIWidget
	{
	public:
		/**
		 * @brief	Constructs a new window frame.
		 *
		 * @param	parent			Parent SceneObject to attach the Component to.
		 * @param	allowResize		Should the widget set up resize handles that can be dragged by the user.
		 * @param	target			Viewport to draw the GUI elements in.
		 * @param	ownerWindow		Window that the frame widget will act on.
		 * @param	skin			GUI skin used for the GUI child elements.
		 */
		WindowFrameWidget(const HSceneObject& parent, bool allowResize, Viewport* target, RenderWindow* ownerWindow, const HGUISkin& skin);
		virtual ~WindowFrameWidget();

	protected:
		/**
		 * @copydoc	Component::update
		 */
		virtual void update() override;

		/**
		 * @copydoc	GUIWidget::ownerWindowFocusChanged
		 */
		virtual bool _mouseEvent(GUIElement* element, const GUIMouseEvent& ev) override;

		/**
		 * @copydoc	GUIWidget::ownerWindowFocusChanged
		 */
		virtual void ownerWindowFocusChanged() override;

		/**
		 * @copydoc	GUIWidget::ownerTargetResized
		 */
		virtual void ownerTargetResized() override;

		/**
		 * @brief	Updates the non-client areas that notify the OS where the interactable elements
		 *			used for window resize operations are. This should be called after any resize
		 *			operations.
		 */
		void refreshNonClientAreas() const;

		static const UINT32 RESIZE_BORDER_WIDTH;

		bool mAllowResize;
		GUIPanel* mWindowFramePanel;
		RenderWindow* mParentWindow;
		GUIWindowFrame* mWindowFrame;
	};
}