/****************************************************************************
Copyright (c) 2011-2013,WebJet Business Division,CYOU

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Permission is hereby granted, free of charge, to any person obtaining a copy
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The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/
#ifndef __inputmousebase_H__
#define __inputmousebase_H__

#include "input/inputhandler.h"
#include "input/inputeventtypes.h"

//------------------------------------------------------------------------------
namespace Input
{
	class InputMouseBase : public Input::InputHandler
	{
		__DeclareClass(InputMouseBase);
	public:
		/// constructor
		InputMouseBase();
		/// destructor
		virtual ~InputMouseBase();

		/// capture input to this event handler
		virtual void BeginCapture();
		/// end input capturing to this event handler
		virtual void EndCapture();

		/// return true if button is currently pressed
		bool ButtonPressed(Input::InputMouseButton::Code btn) const;
		/// return true if button was down at least once in current frame
		bool ButtonDown(Input::InputMouseButton::Code btn) const;
		/// return true if button was up at least once in current frame
		bool ButtonUp(Input::InputMouseButton::Code btn) const;
		/// return true if a button has been double clicked
		bool ButtonDoubleClicked(Input::InputMouseButton::Code btn) const;
		/// return true if mouse wheel rotated forward
		bool WheelForward() const;
		/// return true if mouse wheel rotated backward
		bool WheelBackward() const;
		/// get current absolute mouse position (in pixels)
		const Math::float2& GetPixelPosition() const;
		/// get current screen space mouse position (0.0 .. 1.0)
		const Math::float2& GetScreenPosition() const;
		/// get mouse movement
		const Math::float2& GetMovement() const;

		int GetCurrentEventCount() const;

		MouseButtonEvent GetCurrentEvent(int index) const;

	protected:
		/// called when the handler is attached to the input server
		virtual void OnAttach(const GPtr<InputServerBase>& inputServer);
		/// called on InputServer::BeginFrame()
		virtual void OnBeginFrame();
		/// called when an input event should be processed
		virtual bool OnEvent(const Input::InputEvent& inputEvent);
		/// called when input handler obtains capture
		virtual void OnObtainCapture();
		/// called when input handler looses capture
		virtual void OnReleaseCapture();
		/// reset the input handler
		virtual void OnReset();

	private:
		/// update mouse position members
		void UpdateMousePositions(const Math::float2& pixelPos, const Math::float2& screenPos);

		struct ButtonState
		{
		public:
			/// constructor
			ButtonState() : pressed(false), down(false), up(false), doubleClicked(false) {};

			bool pressed;
			bool down;
			bool up;
			bool doubleClicked;
		};
		Util::Array<MouseButtonEvent> currentEvents;
		Util::FixedArray<ButtonState> buttonStates;
		Math::float2 beginFramePixelPosition;
		Math::float2 beginFrameScreenPosition;
		Math::float2 pixelPosition;
		Math::float2 screenPosition;
		Math::float2 movement;
		bool wheelForward;
		bool wheelBackward;
		bool initialMouseMovement;
	};

	//------------------------------------------------------------------------------
	/**
	*/
	inline 
	bool 
	InputMouseBase::ButtonPressed(Input::InputMouseButton::Code btn) const
	{
		return this->buttonStates[btn].pressed;
	}

	//------------------------------------------------------------------------------
	/**
	*/
	inline 
	bool
	InputMouseBase::ButtonDown(Input::InputMouseButton::Code btn) const
	{
		return this->buttonStates[btn].down;
	}

	//------------------------------------------------------------------------------
	/**
	*/
	inline 
	bool
	InputMouseBase::ButtonUp(Input::InputMouseButton::Code btn) const
	{
		return this->buttonStates[btn].up;
	}

	//------------------------------------------------------------------------------
	/**
	*/
	inline 
	bool
	InputMouseBase::ButtonDoubleClicked(Input::InputMouseButton::Code btn) const
	{
		return this->buttonStates[btn].doubleClicked;
	}

	//------------------------------------------------------------------------------
	/**
	*/
	inline 
	const Math::float2&
	InputMouseBase::GetPixelPosition() const
	{
		return this->pixelPosition;
	}

	//------------------------------------------------------------------------------
	/**
	*/
	inline 
	const Math::float2&
	InputMouseBase::GetScreenPosition() const
	{
		return this->screenPosition;
	}

	//------------------------------------------------------------------------------
	/**
	*/
	inline 
	const Math::float2&
	InputMouseBase::GetMovement() const
	{
		return this->movement;
	}

	//------------------------------------------------------------------------------
	/**
	*/
	inline 
	bool
	InputMouseBase::WheelForward() const
	{
		return this->wheelForward;
	}

	//------------------------------------------------------------------------------
	/**
	*/
	inline 
	bool
	InputMouseBase::WheelBackward() const
	{
		return this->wheelBackward;
	}

	inline
	int
	InputMouseBase::GetCurrentEventCount() const
	{
		return currentEvents.Size();
	}

	inline
	MouseButtonEvent
	InputMouseBase::GetCurrentEvent(int index) const
	{
		return currentEvents[index];
	}

} // namespace Input
//------------------------------------------------------------------------------








#endif // __inputmousebase_H__