BansheeEngine/BansheeEditor/Include/BsGUIHoverHitBox.h

#pragma once

#include "BsEditorPrerequisites.h"
#include "BsGUIElementContainer.h"

namespace BansheeEngine
{
	/**
	 * Helper class used for detecting when mousing over a certain
	 * and getting notified when that state changes. 
	 */
	class BS_ED_EXPORT GUIHoverHitBox : public GUIElementContainer
	{
	public:
		/**
		 * Returns type name of the GUI element used for finding GUI element styles. 
		 */
		static const String& getGUITypeName();

		/**
		 * Creates a new hover hit box that will detect mouse hover/out events over certain area.
		 */
		static GUIHoverHitBox* create();

		/**
		 * Creates a new hover hit box that will detect mouse hover/out events over certain area.
		 */
		static GUIHoverHitBox* create(const GUIOptions& options);

		/**
		 * @brief	Triggered when pointer hovers over the hit box.
		 */
		Event<void()> onHover;

		/**
		 * @brief	Triggered when pointer that was previously hovering leaves the hit box.
		 */
		Event<void()> onOut;

	private:
		GUIHoverHitBox(const GUIDimensions& dimensions);

		/**
		 * @copydoc	GUIElementContainer::updateClippedBounds
		 */
		void updateClippedBounds() override;

		/**
		 * @copydoc	GUIElementContainer::_mouseEvent
		 */
		virtual bool _mouseEvent(const GUIMouseEvent& ev) override;
	};
}