www.pudn.com > huicad.rar > CHGVIEWCMD.CPP

#include "stdafx.h" 
#include "math.h" 
 
#include "Entity.h" 
 
#include "VCad.h" 
#include "VCadDoc.h" 
#include "VCadView.h" 
#include "MainFrm.h" 
 
#include "Command.h" 
#include "ChgViewCmd.h" 
 
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
/////////////////////////////////////////////////////////////// 
/*	 
 *	CLASS	CViewPanCmd 
 */ 
CViewPanCmd::CViewPanCmd() 
{ 
	m_nStep = 0; // 初始化操作步为 0 
} 
 
CViewPanCmd::~CViewPanCmd() 
{ 
} 
 
int	CViewPanCmd::GetType() 
{ 
	return ctViewPan; 
} 
 
int	CViewPanCmd::OnLButtonDown(UINT nFlags, const Position& pos)  
{ 
	m_nStep ++ ; 
	 
	CRect rc ; 
	g_pView->GetClientRect(&rc) ; 
 
	switch(m_nStep) 
	{ 
		case 1: 
			m_basePos = m_desPos = pos; 
			::Prompt("请输入平移画面的目标点：") ; 
			break; 
		case 2: 
		{ 
			m_desPos = pos; 
			double dx = m_basePos.x - m_desPos.x; 
			double dy = m_basePos.y - m_desPos.y ; 
 
			g_pView->m_dOrgX += dx ; 
			g_pView->m_dOrgY += dy ; 
			g_pView->Invalidate() ;	 
			 
			g_pDoc->SetModifiedFlag(TRUE); 
 
			//	设置步骤为0 
			m_nStep = 0; 
			break; 
		} 
		default: 
			break; 
	} 
	return 0; 
} 
 
int	CViewPanCmd::OnMouseMove(UINT nFlags, const Position& pos) 
{ 
	switch(m_nStep) 
	{ 
		case 1: 
		{ 
			CRect	rect; 
			g_pView->GetClientRect(&rect);  
				 
			Position	prePos, curPos; 
			prePos = m_basePos ;// 
			curPos = pos ; 
			//计算位移差 
			Position dp = prePos - curPos ; 
			//计算平移后的世界坐标原点 
			g_pView->m_dOrgX += dp.x ; 
			g_pView->m_dOrgY += dp.y ; 
			//由于每移动一次，坐标原点都要改变， 
			//所以，起始点的位置也发生变化 
			m_basePos.x = pos.x + dp.x; 
			m_basePos.y = pos.y + dp.y ; 
			 
			g_pView->Invalidate(TRUE) ; 
			break; 
		} 
		default: 
			break; 
	} 
	return 0; 
} 
 
// Click right button to cancel the operation 
int	CViewPanCmd::OnRButtonDown(UINT nFlags, const Position& pos)  
{ 
	m_nStep = 0; 
	return 0; 
} 
 
int CViewPanCmd::Cancel() 
{ 
	return 0 ; 
} 
/////////////////////////////////////////////////////////////// 
/////////////////////////////////////////////////////////////// 
/*	 
 *	CLASS	CZoomRgnCmd 
 */ 
CZoomRgnCmd::CZoomRgnCmd() 
{ 
	m_nStep = 0; // 初始化操作步为 0 
} 
 
CZoomRgnCmd::~CZoomRgnCmd() 
{ 
} 
 
int CZoomRgnCmd::GetType() 
{ 
	return ctViewZoomRgn; 
} 
 
int	CZoomRgnCmd::OnLButtonDown(UINT nFlags, const Position& pos)  
{ 
	m_nStep ++; 
	switch(m_nStep) 
	{ 
		case 1: 
		{ 
			m_basePos = m_desPos = pos; 
			Prompt("请输入缩放矩形的右下角点：") ; 
			break; 
		} 
		case 2: 
		{ 
			m_desPos = pos; 
			// 获得当前的设备环境 
			CDC*	pDC = g_pView->GetDC();  
			CRect rc ; 
			g_pView->GetClientRect(&rc) ; 
			// 转换为逻辑坐标系 
			pDC->DPtoLP(&rc) ; 
			// 计算新坐标系的原点 
			g_pView->m_dOrgX = (m_basePos.x + m_desPos.x)/2. ; 
			g_pView->m_dOrgY = -(m_basePos.y + m_desPos.y)/2. ; 
			// 计算新坐标系与设备坐标的比例因子 
			double scalex = fabs((m_basePos.x - m_desPos.x)/ 
				(rc.right-rc.left)) ; 
			double scaley = fabs((m_basePos.y - m_desPos.y)/ 
				(rc.bottom-rc.top )) ; 
			if(scalex>scaley) 
				g_pView->scale = scalex ; 
			else 
				g_pView->scale = scaley ; 
			// 设置比例因子的取值范围 
			if(fabs(g_pView->scale)<1e-6|| 
				fabs(g_pView->scale>1e+6)) 
				g_pView->scale = 1. ; 
			 
			g_pDoc->UpdateAllViews(NULL) ; 
			// 设置修改标记 
			g_pDoc->SetModifiedFlag(TRUE); 
			// 释放当前的设备环境 
			g_pView->ReleaseDC(pDC);  
			 
			m_nStep = 0; 
			break; 
		} 
		default: 
			m_nStep = 0; 
			break;		 
	} 
	return 0; 
} 
 
int	CZoomRgnCmd::OnMouseMove(UINT nFlags, const Position& pos) 
{ 
	switch(m_nStep) 
	{ 
		case 1: 
		{ 
			Position	prePos, curPos; 
			prePos = m_desPos; 
			curPos = pos; 
			// 获得当前的设备环境 
			CDC*	pDC = g_pView->GetDC();  
			CPoint prep, curp, bp ; 
			// 转换成屏幕坐标点 
			g_pView->WorldtoScreen(prePos, prep) ; 
			g_pView->WorldtoScreen(curPos, curp) ; 
			g_pView->WorldtoScreen(m_basePos, bp) ; 
			 
			pDC->SelectStockObject(NULL_BRUSH) ; 
			int ndrawmode = pDC->SetROP2(R2_NOT) ; 
			// 绘制被放大区域 
			pDC->Rectangle(bp.x, bp.y, prep.x, prep.y) ; 
			pDC->Rectangle(bp.x, bp.y, curp.x, curp.y) ; 
			pDC->SetROP2(ndrawmode) ; 
			// 释放当前的设备环境 
			g_pView->ReleaseDC(pDC);  
			m_desPos = pos; 
			break; 
		} 
	} 
	return 0; 
} 
 
int	CZoomRgnCmd::OnRButtonDown(UINT nFlags, const Position& pos)  
{ 
 
	::ClipCursor(NULL); 
 
	m_nStep = 0; 
	return 0; 
} 
 
int CZoomRgnCmd::Cancel() 
{ 
	return 0 ; 
}