www.gusucode.com > VC++画图并剪裁线条的演示程序源码程序 > VC++画图并剪裁线条的演示程序源码程序/code/裁剪Dlg.cpp
// 裁剪Dlg.cpp : implementation file // Download by http://www.NewXing.com #include "stdafx.h" #include "裁剪.h" #include "裁剪Dlg.h" #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif ///////////////////////////////////////////////////////////////////////////// // CAboutDlg dialog used for App About class CAboutDlg : public CDialog { public: CAboutDlg(); // Dialog Data //{{AFX_DATA(CAboutDlg) enum { IDD = IDD_ABOUTBOX }; //}}AFX_DATA // ClassWizard generated virtual function overrides //{{AFX_VIRTUAL(CAboutDlg) protected: virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support //}}AFX_VIRTUAL // Implementation protected: //{{AFX_MSG(CAboutDlg) //}}AFX_MSG DECLARE_MESSAGE_MAP() }; CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) { //{{AFX_DATA_INIT(CAboutDlg) //}}AFX_DATA_INIT } void CAboutDlg::DoDataExchange(CDataExchange* pDX) { CDialog::DoDataExchange(pDX); //{{AFX_DATA_MAP(CAboutDlg) //}}AFX_DATA_MAP } BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) //{{AFX_MSG_MAP(CAboutDlg) // No message handlers //}}AFX_MSG_MAP END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CMyDlg dialog CMyDlg::CMyDlg(CWnd* pParent /*=NULL*/) : CDialog(CMyDlg::IDD, pParent) { //{{AFX_DATA_INIT(CMyDlg) // NOTE: the ClassWizard will add member initialization here //}}AFX_DATA_INIT // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); ldb = FALSE; step = 0; top = 20,but = 100,lef = 20,rig = 100; lxb = 0,lyb = 0; lxe = 50,lye = 50; } void CMyDlg::DoDataExchange(CDataExchange* pDX) { CDialog::DoDataExchange(pDX); //{{AFX_DATA_MAP(CMyDlg) // NOTE: the ClassWizard will add DDX and DDV calls here //}}AFX_DATA_MAP } BEGIN_MESSAGE_MAP(CMyDlg, CDialog) //{{AFX_MSG_MAP(CMyDlg) ON_WM_SYSCOMMAND() ON_WM_PAINT() ON_WM_QUERYDRAGICON() ON_BN_CLICKED(IDC_BUTTON4, OnButton4) ON_BN_CLICKED(IDC_BUTTON1, OnButton1) ON_BN_CLICKED(IDC_BUTTON2, OnButton2) ON_WM_LBUTTONDOWN() ON_WM_LBUTTONUP() ON_WM_MOUSEMOVE() ON_BN_CLICKED(IDC_BUTTON3, OnButton3) //}}AFX_MSG_MAP END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CMyDlg message handlers BOOL CMyDlg::OnInitDialog() { CDialog::OnInitDialog(); // Add "About..." menu item to system menu. // IDM_ABOUTBOX must be in the system command range. ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); ASSERT(IDM_ABOUTBOX < 0xF000); CMenu* pSysMenu = GetSystemMenu(FALSE); if (pSysMenu != NULL) { CString strAboutMenu; strAboutMenu.LoadString(IDS_ABOUTBOX); if (!strAboutMenu.IsEmpty()) { pSysMenu->AppendMenu(MF_SEPARATOR); pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); } } // Set the icon for this dialog. The framework does this automatically // when the application's main window is not a dialog SetIcon(m_hIcon, TRUE); // Set big icon SetIcon(m_hIcon, FALSE); // Set small icon // TODO: Add extra initialization here CPaintDC dc(this); pic.CreateCompatibleDC(&dc); CBitmap * bp1,*obp1; bp1 = new CBitmap; bp1->LoadBitmap(IDB_B); obp1 = pic.SelectObject(bp1); obp1->DeleteObject(); return TRUE; // return TRUE unless you set the focus to a control } void CMyDlg::OnSysCommand(UINT nID, LPARAM lParam) { if ((nID & 0xFFF0) == IDM_ABOUTBOX) { CAboutDlg dlgAbout; dlgAbout.DoModal(); } else { CDialog::OnSysCommand(nID, lParam); } } // If you add a minimize button to your dialog, you will need the code below // to draw the icon. For MFC applications using the document/view model, // this is automatically done for you by the framework. void CMyDlg::OnPaint() { CPaintDC dc(this); // device context for painting if (IsIconic()) { SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); // Center icon in client rectangle int cxIcon = GetSystemMetrics(SM_CXICON); int cyIcon = GetSystemMetrics(SM_CYICON); CRect rect; GetClientRect(&rect); int x = (rect.Width() - cxIcon + 1) / 2; int y = (rect.Height() - cyIcon + 1) / 2; // Draw the icon dc.DrawIcon(x, y, m_hIcon); } else { CDialog::OnPaint(); } CDC mdc; CBitmap bmp,*bp; bmp.LoadBitmap(IDB_B); mdc.CreateCompatibleDC(GetDC()); bp = mdc.SelectObject(&bmp); pic.BitBlt(0,0,500,320,&mdc,0,0,SRCCOPY); mdc.SelectObject(bp); CDC * dc1; CWnd * wd1; wd1 = this->GetDlgItem(IDC_S); dc1 = wd1->GetDC(); pic.MoveTo(lxb,lyb); pic.LineTo(lxe,lye); pic.MoveTo(lef,top); pic.LineTo(rig,top); pic.LineTo(rig,but); pic.LineTo(lef,but); pic.LineTo(lef,top); dc1->BitBlt(1,1,496,309,&pic,0,0,SRCCOPY); } // The system calls this to obtain the cursor to display while the user drags // the minimized window. HCURSOR CMyDlg::OnQueryDragIcon() { return (HCURSOR) m_hIcon; } void CMyDlg::OnButton4() { // TODO: Add your control notification handler code here OnOK(); } void CMyDlg::OnButton1() { // TODO: Add your control notification handler code here step = 1; } void CMyDlg::OnButton2() { // TODO: Add your control notification handler code here step = 2; } void CMyDlg::OnLButtonDown(UINT nFlags, CPoint point) { // TODO: Add your message handler code here and/or call default if(step){ if(point.x>11&&point.x<508&&point.y>11&&point.y<321){ ldb = TRUE; switch(step){ case 1: top = point.y-12; lef = point.x-12; break; case 2: lxb = point.x-12; lyb = point.y-12; break; } } } CDialog::OnLButtonDown(nFlags, point); } void CMyDlg::OnLButtonUp(UINT nFlags, CPoint point) { // TODO: Add your message handler code here and/or call default if(ldb){ ldb = FALSE; int ti; switch(step){ case 1: but = point.y-12; rig = point.x-12; if(but<top){ti = but;but = top;top = ti;} if(lef>rig){ti = lef;lef = rig;rig = ti;} break; case 2: lxe = point.x-12; lye = point.y-12; break; } Invalidate(FALSE); } CDialog::OnLButtonUp(nFlags, point); } void CMyDlg::OnMouseMove(UINT nFlags, CPoint point) { // TODO: Add your message handler code here and/or call default if(ldb){ switch(step){ case 1: but = point.y-12; rig = point.x-12; break; case 2: lxe = point.x-12; lye = point.y-12; break; } Invalidate(FALSE); } CDialog::OnMouseMove(nFlags, point); } #define LEFT 1 #define RIGHT 2 #define BOTTOM 4 #define TOP 8 int CMyDlg::code(int x,int y){//编码函数 int c = 0; if(x<lef) c = c|LEFT; else if(x>rig) c = c|RIGHT; if(y>but) c = c|BOTTOM; else if(y<top) c = c|TOP; return c; } void CMyDlg::OnButton3() { // TODO: Add your control notification handler code here int code1,code2,tcode; code1 = code(lxb,lyb); code2 = code(lxe,lye); int x,y; while(code1!=0||code2!=0){ if((code1&code2)!=0){ lxb = 0,lyb = 0; lxe = 0,lye = 0; break; } tcode = code1; if(code1 == 0){ tcode = code2; } // float tt = 0.5f; if((tcode&LEFT)!=0){//交左边界 x = lef; y = lyb + (int)(float(lye - lyb)*float(lef-lxb)/float(lxe - lxb)); } else if((tcode&RIGHT)!=0){//右边界相交 x = rig; y = lyb + int(float(lye - lyb)*float(rig - lxb)/float(lxe - lxb)); } else if((tcode&BOTTOM) != 0){//与下边界相交 y = but; x = lxb + int(float(lxe - lxb) * float(but - lyb)/float(lye - lyb)); } else if((tcode&TOP)!=0){//与上边界相交 y = top; x = lxb + int(float(lxe - lxb) * float(top - lyb)/float(lye - lyb)); } if(tcode == code1){ lxb = x; lyb = y; code1 = code(x,y); } else{ lxe = x; lye = y; code2 = code(x,y); } } // step = 0; Invalidate(FALSE); }