透明窗口源码 透明效果

// AlphaBlending.cpp : Defines the class behaviors for the application. // #include "stdafx.h" #include "AlphaBlending.h" #include "MainFrm.h" #include "AlphaBlendingDoc.h" #include "AlphaBlendingView.h" #include "OpaqueDlg.h" #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif ///////////////////////////////////////////////////////////////////////////// // CAlphaBlendingApp BEGIN_MESSAGE_MAP(CAlphaBlendingApp, CWinApp) //{{AFX_MSG_MAP(CAlphaBlendingApp) ON_COMMAND(ID_APP_ABOUT, OnAppAbout) ON_COMMAND(ID_ALPHA_SETOPAQUE, OnAlphaSetopaque) ON_COMMAND(ID_ALPHA_TOGGLE, OnAlphaToggle) ON_UPDATE_COMMAND_UI(ID_ALPHA_TOGGLE, OnUpdateAlphaToggle) //}}AFX_MSG_MAP // Standard file based document commands ON_COMMAND(ID_FILE_NEW, CWinApp::OnFileNew) ON_COMMAND(ID_FILE_OPEN, CWinApp::OnFileOpen) END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CAlphaBlendingApp construction CAlphaBlendingApp::CAlphaBlendingApp() { // TODO: add construction code here, // Place all significant initialization in InitInstance } ///////////////////////////////////////////////////////////////////////////// // The one and only CAlphaBlendingApp object CAlphaBlendingApp theApp; ///////////////////////////////////////////////////////////////////////////// // CAlphaBlendingApp initialization BOOL CAlphaBlendingApp::InitInstance() { AfxEnableControlContainer(); // Standard initialization // If you are not using these features and wish to reduce the size // of your final executable, you should remove from the following // the specific initialization routines you do not need. #ifdef _AFXDLL Enable3dControls(); // Call this when using MFC in a shared DLL #else Enable3dControlsStatic(); // Call this when linking to MFC statically #endif // Change the registry key under which our settings are stored. // TODO: You should modify this string to be something appropriate // such as the name of your company or organization. SetRegistryKey(_T("Local AppWizard-Generated Applications")); LoadStdProfileSettings(); // Load standard INI file options (including MRU) // Register the application's document templates. Document templates // serve as the connection between documents, frame windows and views. CSingleDocTemplate* pDocTemplate; pDocTemplate = new CSingleDocTemplate( IDR_MAINFRAME, RUNTIME_CLASS(CAlphaBlendingDoc), RUNTIME_CLASS(CMainFrame), // main SDI frame window RUNTIME_CLASS(CAlphaBlendingView)); AddDocTemplate(pDocTemplate); // Parse command line for standard shell commands, DDE, file open CCommandLineInfo cmdInfo; ParseCommandLine(cmdInfo); // Dispatch commands specified on the command line if (!ProcessShellCommand(cmdInfo)) return FALSE; // setup alpha blending m_Alpha.SetWindowHandle(m_pMainWnd); m_Alpha.SetOpacity(); // The one and only window has been initialized, so show and update it. m_pMainWnd->ShowWindow(SW_SHOW); m_pMainWnd->UpdateWindow(); return TRUE; } ///////////////////////////////////////////////////////////////////////////// // 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) // No message handlers //}}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() // App command to run the dialog void CAlphaBlendingApp::OnAppAbout() { CAboutDlg aboutDlg; aboutDlg.DoModal(); } ///////////////////////////////////////////////////////////////////////////// // CAlphaBlendingApp message handlers void CAlphaBlendingApp::OnAlphaSetopaque() { COpaqueDlg dlg; dlg.m_nOpaqueLevel = m_Alpha.GetOpacity(); if (dlg.DoModal() == IDOK) { m_Alpha.SetOpacity(dlg.m_nOpaqueLevel); } } void CAlphaBlendingApp::OnAlphaToggle() { m_Alpha.SetTransparent(!m_Alpha.IsTransparent()); } void CAlphaBlendingApp::OnUpdateAlphaToggle(CCmdUI* pCmdUI) { if (m_Alpha.IsTransparent()) { pCmdUI->SetCheck(); } else { pCmdUI->SetCheck(0); } }