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

#include "stdafx.h" 
#include "DrawPadDoc.h" 
 
#include "rbdcircle.h" 
#include "circletool.h" 
#include "ecircle.h" 
 
CIRCLE_TOOL::CIRCLE_TOOL() 
{ 
	m_pRbdCircle = NULL; 
	m_pView = NULL; 
} 
 
CIRCLE_TOOL::~CIRCLE_TOOL() 
{ 
	if( m_pRbdCircle ) delete m_pRbdCircle; 
} 
 
int CIRCLE_TOOL::ProcessEvent(int evType, const PICK_EVENT& pe) 
{ 
	switch( evType ) { 
	case WM_LBUTTONDOWN: 
		m_nStart = pe.pick(); 
		m_pView = pe.view(); 
		if( m_pRbdCircle ) delete m_pRbdCircle; 
		m_pRbdCircle = new RBD_CIRCLE(m_nStart); 
		m_pRbdCircle->Start(pe); 
		evType = 0; 
		break; 
	case WM_LBUTTONUP: 
		delete m_pRbdCircle; 
		m_pRbdCircle = NULL; 
		m_nEnd = pe.pick(); 
		CreateCircle(); 
		evType = 0; 
		break; 
	} 
	return MOUSE_TOOL::ProcessEvent(evType, pe); 
} 
 
void CIRCLE_TOOL::CreateCircle() 
{ 
	ASSERT_VALID(m_pView); 
	CDrawPadDoc *pDoc = (CDrawPadDoc *)m_pView->GetDocument(); 
	ASSERT_VALID(pDoc); 
	if( m_nStart != m_nEnd ) 
	{ 
		UNDO_BEGIN 
		pDoc->AddEntity(new ECIRCLE(m_nStart, m_nEnd,pDoc->m_nWidth,pDoc->m_nColor,pDoc->m_line)); 
		UNDO_END 
	} 
}