www.pudn.com > VCad3.0.zip > VCadView-2.cpp

// VCadView.cpp : implementation of the CVCadView class 
// 
 
#include "stdafx.h" 
#include "VCad.h" 
 
#include "VCadDoc.h" 
#include "VCadView.h" 
 
#include "Base.h" 
#include "Command.h" 
#include "CreateCmd.h" 
#include "ModifyCmd.h" 
#include "Entity.h" 
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
///////////////////////////////////////////////////////////////////////////// 
// CVCadView 
 
IMPLEMENT_DYNCREATE(CVCadView, CView) 
 
BEGIN_MESSAGE_MAP(CVCadView, CView) 
	//{{AFX_MSG_MAP(CVCadView) 
	ON_WM_LBUTTONDOWN() 
	ON_WM_MOUSEMOVE() 
	ON_WM_RBUTTONDOWN() 
	ON_COMMAND(ID_PICK, OnPick) 
	ON_UPDATE_COMMAND_UI(ID_PICK, OnUpdatePick) 
	//}}AFX_MSG_MAP 
	// Standard printing commands 
	ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint) 
	ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint) 
	ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview) 
 
	ON_COMMAND_RANGE(ID_CREATE_LINE, ID_CREATE_ARC, OnCreateEntity) 
	ON_UPDATE_COMMAND_UI_RANGE(ID_CREATE_LINE, ID_CREATE_ARC, OnUpdateCreateCommand) 
	ON_COMMAND_RANGE(ID_MODIFY_MOVE, ID_MODIFY_MIRROR, OnModifyEntity) 
	ON_UPDATE_COMMAND_UI_RANGE(ID_MODIFY_MOVE, ID_MODIFY_MIRROR, OnUpdateModifyCommand) 
END_MESSAGE_MAP() 
 
///////////////////////////////////////////////////////////////////////////// 
// CVCadView construction/destruction 
 
CVCadView::CVCadView() 
{ 
	// TODO: add construction code here 
	g_pView = this; 
	m_pCmd = NULL; 
	// 初始化世界坐标与屏幕坐标的关系 
	m_dOrgX = m_dOrgY = 0.; 
	scale = 1.; 
} 
 
CVCadView::~CVCadView() 
{ 
	if( m_pCmd ) 
		delete m_pCmd ; 
} 
 
BOOL CVCadView::PreCreateWindow(CREATESTRUCT& cs) 
{ 
	// TODO: Modify the Window class or styles here by modifying 
	//  the CREATESTRUCT cs 
 
	return CView::PreCreateWindow(cs); 
} 
 
///////////////////////////////////////////////////////////////////////////// 
// CVCadView drawing 
 
void CVCadView::OnDraw(CDC* pDC) 
{ 
	g_nRefresh ++; // 每次视窗被重新绘制时，刷新次数加 1 
	CVCadDoc* pDoc = GetDocument(); 
	ASSERT_VALID(pDoc); 
	// TODO: add draw code for native data here 
	pDoc->Draw(pDC); 
} 
 
///////////////////////////////////////////////////////////////////////////// 
// CVCadView diagnostics 
 
#ifdef _DEBUG 
void CVCadView::AssertValid() const 
{ 
	CView::AssertValid(); 
} 
 
void CVCadView::Dump(CDumpContext& dc) const 
{ 
	CView::Dump(dc); 
} 
 
CVCadDoc* CVCadView::GetDocument() // non-debug version is inline 
{ 
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CVCadDoc))); 
	return (CVCadDoc*)m_pDocument; 
} 
#endif //_DEBUG 
 
///////////////////////////////////////////////////////////////////////////// 
// CVCadView message handlers 
 
void CVCadView::OnCreateEntity(int m_nID) 
{ 
	// 如果当前状态存在命令，那么 
	// 1. 取消该命令的操作 
	// 2. 删除该命令对象 
	// 3. 将命令指针设为空 
	if( m_pCmd ){  
		m_pCmd->Cancel(); 
		delete m_pCmd ; 
		m_pCmd = NULL;  
	} 
	// 下面根据不同的菜单命令创建不同的命令对象 
	switch(m_nID) 
	{ 
		case ID_CREATE_LINE: // 直线 
		{ 
			m_pCmd = new CCreateLine(); 
			break; 
		} 
	} 
} 
 
void CVCadView::OnUpdateCreateCommand(CCmdUI* pCmdUI) 
{ 
	int flag = 0 ; 
	switch(pCmdUI->m_nID) 
	{ 
		case ID_CREATE_LINE: 
		{ 
			if( (m_pCmd != NULL && m_pCmd->GetType() == ctCreateLine) ) 
				flag = 1; 
			break; 
		} 
		default: 
			break; 
	} 
	pCmdUI->SetCheck(flag); 
} 
 
void CVCadView::OnModifyEntity(int m_nID) 
{ 
	// 如果当前状态存在命令，那么 
	// 1. 取消该命令的操作 
	// 2. 删除该命令对象 
	// 3. 将命令指针设为空 
	if( m_pCmd ){  
		m_pCmd->Cancel(); 
		delete m_pCmd ; 
		m_pCmd = NULL;  
	} 
	// 下面根据不同的菜单命令创建不同的命令对象 
	switch(m_nID) 
	{ 
		case ID_MODIFY_MOVE: // 平移 
		{ 
			m_pCmd = new CMove(); 
			break; 
		} 
		case ID_MODIFY_ROTATE: // 旋转 
		{ 
			m_pCmd = new CRotate(); 
			break; 
		} 
		case ID_MODIFY_MIRROR: // 镜像 
		{ 
			m_pCmd = new CMirror(); 
			break; 
		} 
		default: 
			break; 
	} 
} 
void CVCadView::OnUpdateModifyCommand(CCmdUI* pCmdUI) 
{ 
	int flag = 0 ; 
	switch(pCmdUI->m_nID) 
	{ 
		case ID_MODIFY_MOVE: 
		{ 
			if( (m_pCmd != NULL && m_pCmd->GetType() == ctMove) ) 
				flag = 1; 
			break; 
		} 
		case ID_MODIFY_ROTATE: 
		{ 
			if( (m_pCmd != NULL && m_pCmd->GetType() == ctRotate) ) 
				flag = 1; 
			break; 
		} 
		case ID_MODIFY_MIRROR: 
		{ 
			if( (m_pCmd != NULL && m_pCmd->GetType() == ctMirror) ) 
				flag = 1; 
			break; 
		} 
		default: 
			break; 
	} 
	pCmdUI->SetCheck(flag); 
} 
void CVCadView::WorldtoScreen(const Position& pos, CPoint& screenPt) 
{ 
	// 获取当前客户区的大小 
	CRect rect ; 
	GetClientRect(&rect) ; 
	// 将屏幕原点设置为客户区的中心 
	int	nSOrgX = (rect.left + rect.right) / 2 ; 
	int nSOrgY = -(rect.top + rect.bottom) / 2 ; 
	// 计算屏幕坐标值 
	screenPt.x = (int)((pos.x - m_dOrgX) / scale + nSOrgX) ; 
//	screenPt.y = (int)(nSOrgY - (pos.y - m_dOrgY) / scale) ; 
	screenPt.y = (int)((pos.y - m_dOrgY) / scale + nSOrgY) ; 
} 
 
void CVCadView::ScreentoWorld(const CPoint& pt, Position& pos) 
{ 
	CPoint screenPt = pt; 
	CDC* pDC = GetDC(); 
	pDC->SetMapMode(MM_LOENGLISH);  
	pDC->DPtoLP(&screenPt); 
	ReleaseDC(pDC);	 
	// 获取当前客户区的大小 
	CRect rect ; 
	GetClientRect(&rect) ; 
	// 将屏幕原点设置为客户区的中心 
	int	nSOrgX = (rect.left + rect.right) / 2 ; 
	int nSOrgY = -(rect.top + rect.bottom) / 2 ; 
	// 计算世界坐标值 
	pos.x = (screenPt.x - nSOrgX) * scale + m_dOrgX; 
//	pos.y = (nSOrgY - screenPt.y ) * scale + m_dOrgY; 
	pos.y = (screenPt.y - nSOrgY ) * scale + m_dOrgY; 
} 
 
double CVCadView::GetScale() 
{ 
	return scale; 
} 
 
void CVCadView::OnLButtonDown(UINT nFlags, CPoint point)  
{ 
	// TODO: Add your message handler code here and/or call default 
	CVCadDoc* pDoc = GetDocument(); 
	ASSERT_VALID(pDoc); 
 
	Position pos; 
	ScreentoWorld(point, pos); // 将设备坐标转换为世界坐标 
 
	if(m_pCmd) 
		m_pCmd->OnLButtonDown(nFlags, pos); 
	else 
		pDoc->OnLButtonDown(nFlags, pos); 
	 
	CView::OnLButtonDown(nFlags, point); 
} 
 
void CVCadView::OnMouseMove(UINT nFlags, CPoint point)  
{ 
	// TODO: Add your message handler code here and/or call default 
	CVCadDoc* pDoc = GetDocument(); 
	ASSERT_VALID(pDoc); 
 
	Position pos; 
	ScreentoWorld(point, pos);// 将设备坐标转换为世界坐标 
 
	if(m_pCmd) 
		m_pCmd->OnMouseMove(nFlags, pos); 
	else 
		pDoc->OnMouseMove(nFlags, pos); 
 
	CView::OnMouseMove(nFlags, point); 
} 
 
void CVCadView::OnRButtonDown(UINT nFlags, CPoint point)  
{ 
	// TODO: Add your message handler code here and/or call default 
	Position pos; 
	ScreentoWorld(point, pos);// 将设备坐标转换为世界坐标 
 
	if(m_pCmd) 
		m_pCmd->OnRButtonDown(nFlags, pos); 
 
	CView::OnRButtonDown(nFlags, point); 
} 
 
void CVCadView::OnPick()  
{ 
	// TODO: Add your command handler code here 
	if(m_pCmd){ 
		delete m_pCmd; 
		m_pCmd = NULL; 
	} 
} 
 
void CVCadView::OnUpdatePick(CCmdUI* pCmdUI)  
{ 
	// TODO: Add your command update UI handler code here 
	pCmdUI->SetCheck(m_pCmd == NULL ? 1 : 0) ; 
} 
///////////////////////////////////////////////////////////////////////////// 
// CVCadView printing 
 
BOOL CVCadView::OnPreparePrinting(CPrintInfo* pInfo) 
{ 
	// 将绘图板设置为2个标准页大小 
	pInfo->SetMaxPage(2); 
	return DoPreparePrinting(pInfo); 
} 
 
void CVCadView::OnBeginPrinting(CDC* pDC, CPrintInfo* pInfo) 
{ 
	// TODO: add extra initialization before printing 
	// 获得可打印区域（毫米值） 
	int nHorzSize = pDC->GetDeviceCaps(HORZSIZE); 
	int nVertSize = pDC->GetDeviceCaps(VERTSIZE); 
	// 计算页面的高度和宽度（逻辑单位）   
	m_nPageWidth = (int)((double)nHorzSize / 25.4 * 100.0); 
	m_nPageHeight = (int)((double)nVertSize / 25.4 * 100.0); 
} 
 
void CVCadView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/) 
{ 
	// TODO: add cleanup after printing 
} 
 
void CVCadView::OnPrepareDC(CDC* pDC, CPrintInfo* pInfo)  
{ 
	pDC->SetMapMode(MM_LOENGLISH);  
	if(pDC->IsPrinting()) 
	{ 
		int nPages = pInfo->m_nCurPage - 1; 
		int x = (nPages & 1) * m_nPageWidth; 
		int y = (nPages / 2) * m_nPageHeight; 
		pDC->SetWindowOrg(x,y); 
	}	 
	CView::OnPrepareDC(pDC, pInfo); 
 
} 
void CVCadView::OnPrint(CDC* pDC, CPrintInfo* pInfo)  
{ 
	ASSERT_VALID(pDC); 
	pDC->SetWindowOrg(pInfo->m_rectDraw.left, 
		-pInfo->m_rectDraw.top); 
	 
	// 打印页眉 
	PrintPageHeader(pDC,pInfo);  
	// 打印图形 
	CView::OnPrint(pDC, pInfo);  
	// 打印页脚 
	PrintPageFooter(pDC,pInfo); 
} 
 
 
void CVCadView::PrintPageHeader(CDC *pDC, CPrintInfo *pInfo) 
{ 
	// 获取设备描述表中缺省的字体 
	TEXTMETRIC tm; 
	pDC->GetTextMetrics(&tm); 
	// 创建新字体并将其选入设备描述表 
	CFont newFont; 
	newFont.CreateFont(-tm.tmHeight, 
		0,0,0, 
		FW_NORMAL, 
		FALSE, FALSE, 
		0, 
		ANSI_CHARSET, OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS, 
		DEFAULT_QUALITY, DEFAULT_PITCH|FF_MODERN, 
		"Courier New"); 
	CFont* pOldFont = (CFont*)pDC->SelectObject(&newFont); 
 
	// 页眉中的文本右对齐 
	pDC->SetTextAlign(TA_RIGHT); 
	// 打印页眉文本 
	pDC->TextOut(pInfo->m_rectDraw.right, -25, "VCad 绘图系统"); 
 
	// 打印页眉中的水平直线 
	int y = - 35 - tm.tmHeight; 
	pDC->MoveTo(0,y); 
	pDC->LineTo(pInfo->m_rectDraw.right,y); 
 
	// 根据页眉占用的空间来调整可打印图形区域 
	y -= 25; 
	pInfo->m_rectDraw.top += y; 
 
	// 恢复以前的字体 
	pDC->SelectObject(pOldFont); 
} 
// 打印页脚 
void CVCadView::PrintPageFooter(CDC *pDC, CPrintInfo *pInfo) 
{ 
	CVCadDoc* pDoc = GetDocument(); 
	ASSERT_VALID(pDoc); 
	 
	// 由文档保存的位置或者标题和当前的页码构成页脚的文本 
	// 如果文档没有被保存，则打印文档的标题名称；反之，则打印文档保存的位置 
	CString strFooter = pDoc->GetPathName(); 
	CString strTitle = pDoc->GetTitle(); 
	if(strTitle == "Untitled" || strTitle == "无标题") 
		strFooter = strTitle; 
	 
	// 文本左对齐 
	pDC->SetTextAlign(TA_LEFT); 
	// 打印文本 
	pDC->TextOut(pInfo->m_rectDraw.left, 
		pInfo->m_rectDraw.bottom + 100, strFooter); 
	 
	// 在页脚中添加页码信息 
	CString strPage; 
	strPage.Format("%s%d%s", "第", pInfo->m_nCurPage, "页"); 
	// 获取页码的宽度 
	CSize size = pDC->GetTextExtent(strFooter); 
	// 页码右对齐 
	pDC->TextOut(pInfo->m_rectDraw.right - size.cx, 
		pInfo->m_rectDraw.bottom + 100, strPage); 
 
	// 绘制页脚的水平上划线 
	TEXTMETRIC tm; 
	pDC->GetTextMetrics(&tm); 
	int y = pInfo->m_rectDraw.bottom + 90 + tm.tmHeight; 
	pDC->MoveTo(0, y); 
	pDC->LineTo(pInfo->m_rectDraw.right, y); 
}