www.pudn.com > drawpad.zip > rbddriver.cpp

#include "stdafx.h" 
#include "pickevent.h" 
 
RBD_DRIVER* RBD_DRIVER::CurrentRBD = NULL; 
 
RBD_DRIVER::RBD_DRIVER() 
{ 
	RBD_DRIVER::CurrentRBD = this; 
	m_pLastView = NULL; 
} 
 
RBD_DRIVER::~RBD_DRIVER() 
{ 
	Stop(); 
	RBD_DRIVER::CurrentRBD = NULL; 
} 
 
void RBD_DRIVER::Start(const PICK_EVENT& pe) 
{ 
	if( m_pLastView != pe.view() ) { 
		Stop(); 
		m_pLastView = pe.view(); 
	} 
	if( m_pLastView ) { 
		m_nLP = pe; 
		DrawAll(); 
	} 
} 
/*void RBD_DRIVER::Start() 
{ 
	if( m_pLastView ) { 
		DrawAll(); 
	} 
}*/ 
 
void RBD_DRIVER::Update(const PICK_EVENT& pe) 
{ 
	if( m_pLastView != pe.view() ) { 
		Stop(); 
		Start(pe); 
	} 
	else if( m_pLastView ) { 
		EraseAll(); 
		m_nLP = pe; 
		DrawAll(); 
	} 
} 
 
void RBD_DRIVER::Stop() 
{ 
	if( m_pLastView ) { 
		EraseAll(); 
		m_pLastView = NULL; 
	} 
} 
 
void RBD_DRIVER::Repaint(const CView* view) 
{ 
	if( view == m_pLastView ) 
		DrawAll(); 
} 
 
void RBD_DRIVER::DeleteViewNotify(const CView* view) 
{ 
	if( view == m_pLastView ) { 
		EraseAll(); 
		m_pLastView = NULL; 
	} 
} 
 
void RBD_DRIVER::DrawAll() 
{ 
	if( !m_pLastView ) return; 
	CDC* pDC = m_pLastView->GetDC(); 
	if( pDC ) { 
		Draw(pDC, m_nLP); 
		int ROP = pDC->SetROP2(R2_XORPEN); 
		int BKM = pDC->SetBkMode(TRANSPARENT); 
		DrawXor(pDC, m_nLP); 
		pDC->SetROP2(ROP); 
		pDC->SetBkMode(BKM); 
		m_pLastView->ReleaseDC(pDC); 
	} 
} 
 
void RBD_DRIVER::EraseAll() 
{ 
	if( !m_pLastView ) return; 
	CDC* pDC = m_pLastView->GetDC(); 
	if( pDC ) { 
		Erase(pDC, m_nLP); 
		int ROP = pDC->SetROP2(R2_XORPEN); 
		int BKM = pDC->SetBkMode(TRANSPARENT); 
		DrawXor(pDC, m_nLP); 
		pDC->SetROP2(ROP); 
		pDC->SetBkMode(BKM); 
		m_pLastView->ReleaseDC(pDC); 
	} 
}