www.pudn.com > VCad3.0.zip > ZoomRgnCmd.cpp

#include "stdafx.h" 
#include "math.h" 
#include "Entity.h" 
#include "MainFrm.h" 
#include "VCad.h" 
#include "VCadDoc.h" 
#include "VCadView.h" 
#include "Command.h" 
#include "ModifyCmd.h" 
#include "Entity.h" 
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
class CVCadDoc ; 
class CVCadView ; 
 
CZoomRgnCmd::CZoomRgnCmd() 
	: m_RgnCorner(0,0), m_RgnCorner1(0,0) 
{ 
	m_nStep = 0;// 初始化操作步为 0 
} 
CZoomRgnCmd::~CZoomRgnCmd() 
{ 
} 
int	CZoomRgnCmd::GetType() 
{ 
	return ctPan; 
} 
int	CZoomRgnCmd::OnLButtonDown(UINT nFlags, const Position& pos)  
{ 
	m_nStep ++ ; 
	switch(m_nStep) 
	{ 
		case 1: 
			// 第一次单击鼠标左键时得到基点位置，并初步设定目标位置 
			m_RgnCorner = m_RgnCorner1 = pos; 
			::Prompt("请输入移动的目标点") ; 
			break; 
		case 2: 
		{ 
			m_RgnCorner1 = pos; 
			CRect rect ; 
			g_pView->GetClientRect(&rect) ; 
 
//			double RgnMaxX, RgnMaxY, RgnMinX, RgnMinY ; 
			 
//			RgnMaxX = max(m_RgnCorner1.x,m_RgnCorner.x); 
//			RgnMinX = min(m_RgnCorner1.x,m_RgnCorner.x); 
//			RgnMaxY = max(m_RgnCorner1.y , m_RgnCorner.y); 
//			RgnMinY = min(m_RgnCorner1.y , m_RgnCorner.y); 
 
			double dx = m_RgnCorner1.x - m_RgnCorner.x ; 
			double dy = m_RgnCorner1.y - m_RgnCorner.y ; 
//			double dx = RgnMaxX - RgnMinX ; 
//			double dy = RgnMaxY - RgnMinY ; 
			double temSal = fabs(dx/(double)rect.right) ; 
			double temSal1 = fabs(dy/(double)rect.bottom) ; 
			double tem = max(temSal, temSal1) ; 
			 
			double orgx = m_RgnCorner1.x + m_RgnCorner.x ; 
			double orgy = m_RgnCorner1.y + m_RgnCorner.y ; 
 
			g_pView->SetOrgX(orgx/2.) ; 
			g_pView->SetOrgY(orgy/2.) ; 
			g_pView->SetScale(tem) ; 
			 
			g_pDoc->UpdateAllViews(NULL) ; 
	 
			m_nStep = 0;  
			break; 
		} 
		default: 
			break; 
	} 
	 
	return 0; 
} 
int	CZoomRgnCmd::OnMouseMove(UINT nFlags, const Position& pos) 
{ 
	// 用一静态变量nPreRefresh记录进入OnMouseMove状态时的刷新次数 
	static	int nPreRefresh = g_nRefresh;  
	// 布尔变量bRefresh说明在OnMouseMove过程中视窗是否被刷新 
	BOOL	bRefresh = FALSE;  
	// nCurRefresh用于记录当前的刷新次数 
	int		nCurRefresh = g_nRefresh;  
	// 如果nCurRefresh和nPreRefresh不相等，说明视窗曾被刷新过 
	if(nCurRefresh != nPreRefresh){  
		bRefresh = TRUE; 
		nPreRefresh = nCurRefresh;  
	} 
	switch(m_nStep) 
	{ 
		case 0: 
			::Prompt("请输入区域的起始点：") ; 
			break; 
		case 1: 
		{ 
			Position	prePos, curPos; 
			prePos = m_RgnCorner; // 获得上一个目标位置 
			curPos = pos; // 得到当前位置 
 
			CDC* pDC = g_pView->GetDC() ; 
			pDC->SelectStockObject(NULL_BRUSH) ; 
			pDC->SetROP2(R2_NOT) ; 
			 
			CRectangle * pTan1 = new CRectangle(prePos, m_RgnCorner1) ; 
			pTan1->Draw(pDC ,dmNormal) ; 
			CRectangle* pTan2 = new CRectangle(prePos, curPos) ; 
			pTan2->Draw(pDC ,dmNormal) ; 
			 
			delete pTan1 ; 
			delete pTan2 ; 
			m_RgnCorner1 = pos; // 将目标设置为当前位置 
			g_pView->ReleaseDC(pDC) ; 
		} 
		default: 
			break; 
	} 
	return 0; 
} 
// 单击鼠标右键取消正在进行的操作 
int	CZoomRgnCmd::OnRButtonDown(UINT nFlags, const Position& pos)  
{ 
	return 0; 
} 
// 调用Cancel 函数取消本次操作 
int CZoomRgnCmd::Cancel() 
{ 
 
	return 0; 
}