为MFC应用程序添加全屏幕显示功能

作者：xiaoxiao
发表时间：2020-12-23 11:01
来源：未知

在CMainFrame类中添加下列成员变量和成员函数(使用ClassWizard)，下面是这些变量和函数的功能说明：成员变量： BOOL m_bFullScreen; //全屏幕显示标志 CRect m_FullScreenWindowRect; //全屏幕显示窗口Rect WINDOWPLACEMENT m_wpPrev; //用于保存正常视图时的窗口位置信息 CToolBar * m_wndFullScreenBar; //全屏幕显示时的浮动工具条成员函数： void OnMenuFullscreen(); //全屏幕显示的处理函数 void OnGetMinMaxInfo(); //捕获WM_GETMINMAXINFO消息以便允许你增加窗口大小 void OnUpdateViewFullScreen(); //更新“全屏幕显示”菜单的状态源码 void CMainFrame::OnMenuFullscreen() {//全屏幕显示的处理函数 RECT rectDesktop; WINDOWPLACEMENT wpNew; if (m_bFullScreen) {//全屏幕显示模式 //隐藏工具条和状态条 m_wndStatusBar.ShowWindow(SW_HIDE); m_wndToolBar.ShowWindow(SW_HIDE); //保存正常视图时的窗口位置信息以便恢复原来状态 GetWindowPlacement (&m_wpPrev); m_wpPrev.length = sizeof m_wpPrev; //调整RECT为新的窗口尺寸 ::GetWindowRect ( ::GetDesktopWindow(), &rectDesktop ); ::AdjustWindowRectEx(&rectDesktop, GetStyle(), TRUE, GetExStyle()); //保存RECT以便OnGetMinMaxInfo()使用 m_FullScreenWindowRect = rectDesktop; wpNew = m_wpPrev; wpNew.showCmd = SW_SHOWNORMAL; wpNew.rcNormalPosition = rectDesktop; //生成新的工具条 m_wndFullScreenBar=new CToolBar; if(!m_wndFullScreenBar->Create(this, CBRS_SIZE_DYNAMIC|CBRS_FLOATING) || !m_wndFullScreenBar->LoadToolBar(IDR_FULLSCREEN)) { TRACE0("Failed to create toolbar/n"); return; // fail to create } //不允许工具条停泊 m_wndFullScreenBar->EnableDocking(FALSE); m_wndFullScreenBar->SetWindowPos(0,100,100,0,0,SWP_NOSIZE |SWP_NOZORDER|SWP_NOACTIVATE|SWP_SHOWWINDOW); m_wndFullScreenBar->SetWindowText(_T("全屏幕显示")); FloatControlBar(m_wndFullScreenBar, CPoint(100,100)); m_bFullScreen=TRUE; } else {//正常显示模式 //删除全屏幕工具条 m_wndFullScreenBar->DestroyWindow(); delete m_wndFullScreenBar; m_bFullScreen=FALSE; //恢复工具条和状态条 m_wndStatusBar.ShowWindow(SW_SHOWNORMAL); m_wndToolBar.ShowWindow(SW_SHOWNORMAL); wpNew = m_wpPrev; } //设置窗口显示状态 SetWindowPlacement ( &wpNew ); } void CMainFrame::OnGetMinMaxInfo(MINMAXINFO FAR* lpMMI) { if (m_bFullScreen) { lpMMI->ptMaxSize.y = m_FullScreenWindowRect.Height(); lpMMI->ptMaxTrackSize.y = lpMMI->ptMaxSize.y; lpMMI->ptMaxSize.x = m_FullScreenWindowRect.Width(); lpMMI->ptMaxTrackSize.x = lpMMI->ptMaxSize.x; } } void CMainFrame::OnUpdateMenuFullscreen(CCmdUI* pCmdUI) {//更新菜单的状态 pCmdUI->Enable(); pCmdUI->SetCheck(m_bFullScreen); }