Graph Drawing

Development Platform:

C/C++

MirrorLine.cpp：Code Content

							// MirrorLine.cpp: implementation of the CMirrorLine class.
//
//////////////////////////////////////////////////////////////////////
#include "stdafx.h"
#include "MirrorLine.h"
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
CMirrorLine::CMirrorLine()
{
}
CMirrorLine::CMirrorLine(CShape *Shape)
{
	if (Shape != NULL)
	{
		SourceBeginPos = Shape->m_ptFirstPos;
		SourceEndPos   = Shape->m_ptSecondPos;
	}
}
CMirrorLine::~CMirrorLine()
{
}
void CMirrorLine::Mirror(HDC hdc,POINT BeginPos,POINT PrePos, POINT EndPos)
{
	
	int nOldMode = ::SetROP2(hdc,R2_XORPEN);
	HPEN hPen    = ::CreatePen( m_PenStyle,
						        m_PenWidth,
								m_PenColor^ GetBkColor(hdc) );
	HPEN hOldPen = (HPEN)::SelectObject(hdc,hPen);
	SetSinCos(BeginPos,PrePos);
	SetMirrorPos(BeginPos,PrePos);
	//擦去前一次线段
	CDraw::DrawLine(hdc,MirrorBeginPos,MirrorEndPos);
	
	SetSinCos(BeginPos,EndPos);
	SetMirrorPos(BeginPos,EndPos);
	//画出这一次线段		
	CDraw::DrawLine(hdc,MirrorBeginPos,MirrorEndPos);				
	
	::SetROP2(hdc,nOldMode);
	::SelectObject(hdc,hOldPen);
	::DeleteObject(hPen);
}
	

						