图形中窗口,视区的关系

// ChildView.cpp : implementation of the CChildView class // #include "stdafx.h" #include "WindowToViewport.h" #include "ChildView.h" #include "MainFrm.h" #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif ///////////////////////////////////////////////////////////////////////////// // CChildView CChildView::CChildView() { //初始化各数据 m_bIsInitialized=FALSE; m_bIsInWindowRect=FALSE; m_font.CreatePointFont(120,"宋体"); } CChildView::~CChildView() { m_font.DeleteObject(); } BEGIN_MESSAGE_MAP(CChildView,CWnd ) //{{AFX_MSG_MAP(CChildView) ON_WM_PAINT() ON_WM_SETCURSOR() ON_WM_LBUTTONDOWN() ON_WM_MOUSEMOVE() ON_EN_CHANGE(IDC_EDITWW,OnChangeWinWidth) ON_EN_CHANGE(IDC_EDITWH,OnChangeWinHeight) ON_EN_CHANGE(IDC_EDITVW,OnChangeViewWidth) ON_EN_CHANGE(IDC_EDITVH,OnChangeViewHeight) //}}AFX_MSG_MAP END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CChildView message handlers BOOL CChildView::PreCreateWindow(CREATESTRUCT& cs) { if (!CWnd::PreCreateWindow(cs)) return FALSE; cs.dwExStyle |= WS_EX_CLIENTEDGE; cs.style &= ~WS_BORDER; cs.lpszClass = AfxRegisterWndClass(CS_HREDRAW|CS_VREDRAW|CS_DBLCLKS, ::LoadCursor(NULL, IDC_ARROW), HBRUSH(COLOR_WINDOW+1), NULL); return TRUE; } void CChildView::OnPaint() { CPaintDC dc(this); // device context for painting CRect rcClient;//视图客户区矩形 GetClientRect(&rcClient);//获取客户区矩形 //如果数据未初始化，则初始化各数据 if (!m_bIsInitialized) { m_ptWorldOrg = CPoint(rcClient.right*11/40,rcClient.bottom*1/2);//记录世界坐标系原点 m_ptScreenOrg = CPoint(rcClient.right*29/40,rcClient.bottom*1/2);//记录屏幕坐标系原点 m_rcWorldRect = CRect(-rcClient.right*7/40,-rcClient.bottom*5/16,rcClient.right*7/40,rcClient.bottom*5/16);//记录世界坐标系矩形 m_rcScreenRect = m_rcWorldRect;//屏幕坐标系举行 m_rcWindowRect = CRect(-(m_rcWorldRect.right-m_rcWorldRect.left)*3/8,-(m_rcWorldRect.right-m_rcWorldRect.left)*9/32,(m_rcWorldRect.right-m_rcWorldRect.left)*3/8,(m_rcWorldRect.right-m_rcWorldRect.left)*9/32);//窗口矩形 m_rcViewportRect = m_rcWindowRect;//视口矩形 //初始化世界坐标系中的图形 m_aWorldFigures.SetSize(4); m_aWorldFigures[0]=CRect(-m_rcWorldRect.Width()*9/20,-m_rcWorldRect.Height()/5,m_rcWorldRect.Width()*2/5,m_rcWorldRect.Height()/15); m_aWorldFigures[1]=CRect(-m_rcWorldRect.Width()/13,-m_rcWorldRect.Height()/10,m_rcWorldRect.Width()*4/13,m_rcWorldRect.Height()*2/7); m_aWorldFigures[2]=CRect(-m_rcWorldRect.Width()*2/5,m_rcWorldRect.Height()/6,m_rcWorldRect.Width()/6,m_rcWorldRect.Height()*2/5); m_aWorldFigures[3]=CRect(-m_rcWorldRect.Width()/5,-m_rcWorldRect.Height()*2/5,m_rcWorldRect.Width()/4,-m_rcWorldRect.Height()/8); //初始化屏幕坐标系中的图形 m_aScreenFigures.Copy(m_aWorldFigures); //确定窗口的最大宽度和高度 m_nMaxWinWidth=m_rcWorldRect.Width()-6; m_nMaxWinHeight=m_rcWorldRect.Height()-6; //////////////////////////////////////////////// //处理微调按钮和编辑框 CSpinButtonCtrl* pSpinWW=GetSpinByID(IDC_SPINWW); CSpinButtonCtrl* pSpinWH=GetSpinByID(IDC_SPINWH); CSpinButtonCtrl* pSpinVW=GetSpinByID(IDC_SPINVW); CSpinButtonCtrl* pSpinVH=GetSpinByID(IDC_SPINVH); //将微调按钮和编辑框一一建立伙伴关系 pSpinWW->SetBuddy(GetEditByID(IDC_EDITWW)); pSpinWH->SetBuddy(GetEditByID(IDC_EDITWH)); pSpinVW->SetBuddy(GetEditByID(IDC_EDITVW)); pSpinVH->SetBuddy(GetEditByID(IDC_EDITVH)); //设置微调按钮的数值范围,最小值为2是为了防止产生除0错误 pSpinWW->SetRange(2,m_nMaxWinWidth); pSpinWH->SetRange(2,m_nMaxWinHeight); pSpinVW->SetRange(2,m_nMaxWinWidth); pSpinVH->SetRange(2,m_nMaxWinHeight); pSpinWW->SetPos(m_rcWindowRect.Width()); pSpinWH->SetPos(m_rcWindowRect.Height()); pSpinVW->SetPos(m_rcWindowRect.Width()); pSpinVH->SetPos(m_rcWindowRect.Height()); //将初始化标志置为真 m_bIsInitialized=TRUE; } /////////////////////////////// //显示标题 dc.SelectObject(&m_font); dc.SetTextColor(RGB(255,0,0));//Set text color dc.SetTextAlign(TA_CENTER+TA_BOTTOM);//Set text align dc.TextOut(rcClient.right/2,30,"窗口到视口的变换");//Show title //////////////////////////////// //处理世界坐标系 dc.SetViewportOrg(m_ptWorldOrg);//设置当前原点为“世界坐标系原点” dc.SetTextColor(RGB(0,0,255)); dc.TextOut(0,m_rcWorldRect.top-20,"窗口"); dc.SetTextColor(RGB(0,150,0)); dc.TextOut(0,m_rcWorldRect.bottom+30,"世界坐标系"); //绘制世界坐标系矩形 DrawRect(&dc,m_ptWorldOrg,m_rcWorldRect,R2_COPYPEN,BS_NULL,RGB(0,150,0)); //绘制世界坐标系中的图形 dc.Rectangle(m_aWorldFigures[0]); dc.Rectangle(m_aWorldFigures[1]); dc.Rectangle(m_aWorldFigures[2]); dc.Rectangle(m_aWorldFigures[3]); //绘制窗口矩形 DrawRect(&dc,m_ptWorldOrg,m_rcWindowRect,R2_NOTXORPEN); //////////////////////////////// //处理屏幕坐标系 dc.SetViewportOrg(m_ptScreenOrg);//设置当前原点为“屏幕坐标系原点” dc.SetTextColor(RGB(0,0,255)); dc.TextOut(0,m_rcScreenRect.top-20,"视口"); dc.SetTextColor(RGB(0,150,0)); dc.TextOut(0,m_rcScreenRect.bottom+30,"屏幕坐标系"); //绘制屏幕坐标系矩形 DrawRect(&dc,m_ptScreenOrg,m_rcScreenRect,R2_COPYPEN,BS_NULL,RGB(0,150,0)); //绘制屏幕坐标系中的矩形 DrawFigures(&dc); // Do not call CWnd::OnPaint() for painting messages } /////////////////////////////////////////// //获取编辑控件 //id:控件ID CEdit* CChildView::GetEditByID(int id) { CMainFrame* pMainFrame=(CMainFrame*)GetParentFrame(); return (CEdit*)(pMainFrame->m_wndDialogBar.GetDlgItem(id)); } ////////////////////////////////////////// //获取微调按钮 //id:控件ID CSpinButtonCtrl* CChildView::GetSpinByID(int id) { CMainFrame* pMainFrame=(CMainFrame*)GetParentFrame(); return (CSpinButtonCtrl*)(pMainFrame->m_wndDialogBar.GetDlgItem(id)); } ///////////////////////////////////////////////////////////// //绘制矩形 //pDC:设备环境指针，origin:当前绘图原点，rect:待绘制的矩形， //nDrawMode:绘图模式，默认为R2_COPYPEN， //brushStyle:画刷风格，默认为BS_NULL， //penColor:画笔颜色,默认为RGB(0,0,255) void CChildView::DrawRect(CDC* pDC, CPoint origin, CRect rect, int nDrawMode, UINT brushStyle,COLORREF penColor) { int nOldMode = pDC->SetROP2(nDrawMode);//设置绘图模式 CPen pen(PS_SOLID,2,penColor);//设置画笔颜色 CPen *pOldPen = pDC->SelectObject(&pen); CBrush brush,*pOldBrush;// LOGBRUSH lgbrush; lgbrush.lbStyle = brushStyle; lgbrush.lbColor = RGB(255,255,255); brush.CreateBrushIndirect(&lgbrush);//创建画刷 pOldBrush = pDC->SelectObject(&brush); pDC->SetViewportOrg(origin);//设置原点 pDC->Rectangle(rect);//绘制矩形 //重置设备环境 pDC->SelectObject(pOldPen); pDC->SelectObject(pOldBrush); pDC->SetROP2(nOldMode); } ////////////////////////////////////////// //绘制屏幕坐标系中的图形 void CChildView::DrawFigures(CDC* pDC) { CRect wr = m_rcWindowRect; wr.OffsetRect(-wr.CenterPoint());//视口中图形的移动和窗口的移动是相反的 pDC->SetViewportOrg(m_ptScreenOrg);//以屏幕坐标系原点为当前原点 pDC->Rectangle(m_rcViewportRect);//擦除视口中原来的图形 pDC->SetMapMode(MM_ANISOTROPIC);//设置映射模式为各向异性 pDC->SetWindowExt(m_rcWindowRect.Width(),m_rcWindowRect.Height());//设置窗口大小 pDC->SetViewportExt(m_rcViewportRect.Width(),m_rcViewportRect.Height());//设置视口大小 //绘制视口中的图形,通过“交”操作来代替裁剪 pDC->Rectangle(m_aScreenFigures[0]&wr); pDC->Rectangle(m_aScreenFigures[1]&wr); pDC->Rectangle(m_aScreenFigures[2]&wr); pDC->Rectangle(m_aScreenFigures[3]&wr); pDC->SetMapMode(MM_TEXT); //重绘视口 DrawRect(pDC,m_ptScreenOrg,m_rcViewportRect); } //////////////////////////////////////////// //移动屏幕坐标系中的图形 //offset:偏移量 void CChildView::OffsetFigures(CPoint offset) { for(int i=0;i<m_aScreenFigures.GetSize();i++) m_aScreenFigures[i].OffsetRect(offset); } ////////////////////////////////////////////// //