// RelativeMouseInput.cpp: implementation of the CRelativeMouseInput class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "RelativeMouseInput.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif


// constuctor
CRelativeMouseInput::CRelativeMouseInput()
{
	m_Captured=false;
}

// destructor
CRelativeMouseInput::~CRelativeMouseInput()
{

}



void CRelativeMouseInput::OnButtonDown( HWND inHwnd )	// call in OnLButtonDown/OnMButtonDown/OnRButtonDown
{
	if(!m_Captured)
	{
		SetCapture(inHwnd);m_Captured=true;

		GetCursorPos(&m_savedpos);

		int midx=GetSystemMetrics(SM_CXSCREEN)/2;
		int midy=GetSystemMetrics(SM_CYSCREEN)/2;

		SetCursorPos(midx,midy);m_oldx=midx;m_oldy=midy;
		ShowCursor(false);
	}
}


void CRelativeMouseInput::OnButtonUp( void )	// call in OnLButtonUp/OnMButtonUp/OnRButtonUp
{
	if(m_Captured)
	{
		SetCursorPos(m_savedpos.x,m_savedpos.y);
		ShowCursor(true);
		m_Captured=false;

		ReleaseCapture();
	}
}



bool CRelativeMouseInput::OnMouseMove( HWND inHwnd, bool inbButtonDown, int &outRelx, int &outRely )	// call in OnMouseMove
{
	outRelx=0;outRely=0;

	if(m_Captured)
	{
		if(!inbButtonDown)OnButtonUp();
	}
	else
	{
		if(inbButtonDown)OnButtonDown(inHwnd);
	}

	if(m_Captured)
	{
		POINT point;

		GetCursorPos(&point);

		int midx=GetSystemMetrics(SM_CXSCREEN)/2;
		int midy=GetSystemMetrics(SM_CYSCREEN)/2;

		int relx=point.x-m_oldx;
		int rely=point.y-m_oldy;

		int absx=point.x-midx;
		int absy=point.y-midy;

//			GetDC()->SetPixel(relx+300,rely+200,0x000000);
		outRelx=relx;
		outRely=rely;

		bool reset=false;

		if(absx<-200){ reset=true;absx+=200; }
		if(absx>200){ reset=true;absx-=200; }
		if(absy<-200){ reset=true;absy+=200; }
		if(absy>200){ reset=true;absy-=200; }
			

		if(reset)
		{
			SetCursorPos(midx+absx,midy+absy);
			m_oldx=midx+absx;m_oldy=midy+absy;
		}
		else
		{
			m_oldx=point.x;m_oldy=point.y;
		}

		if(outRelx==0 && outRely==0)return(false);

		return(true);
	}
	else return(false);
}



bool CRelativeMouseInput::IsCaptured( void )
{
	return(m_Captured);
}