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标题: 上位机MFC如何获取窗口位置 [打印本页]

作者: qq263946146 时间: 2019-7-14 00:23
标题: 上位机MFC如何获取窗口位置
很多应用程序需要记住上一次窗口的位置和状态信息（最大化、最小化和正常），
我们在这里来完成该功能。
下面是存储窗口的位置代码：
void CMainFrame::OnClose() // message handler for WM_CLOSE
{
// Save main window position
CWinApp* app = AfxGetApp();
WINDOWPLACEMENT wp;
GetWindowPlacement(&wp);
app->WriteProfileInt("Frame", "Status", wp.showCmd);
app->WriteProfileInt("Frame", "Top", wp.rcNormalPosition.top);
app->WriteProfileInt("Frame", "Left", wp.rcNormalPosition.left);
app->WriteProfileInt("Frame", "Bottom", wp.rcNormalPosition.bottom);
app->WriteProfileInt("Frame", "Right", wp.rcNormalPosition.right);

CFrameWnd::OnClose();
}

下面是获取窗口的位置：
BOOL CMainFrame:

reCreateWindow(CREATESTRUCT& cs)
{
//
// Restore main window position
//

CWinApp* app = AfxGetApp();
int s, t, b, r, l;

// only restore if there is a previously saved position
if ( -1 != (s = app->GetProfileInt("Frame", "Status", -1)) &&
      -1 != (t = app->GetProfileInt("Frame", "Top",    -1)) &&
      -1 != (l = app->GetProfileInt("Frame", "Left",    -1)) &&
      -1 != (b = app->GetProfileInt("Frame", "Bottom", -1)) &&
      -1 != (r = app->GetProfileInt("Frame", "Right", -1))
   ) {

      // restore the window's status
      app->m_nCmdShow = s;

      // restore the window's width and height
      cs.cx = r - l;
      cs.cy = b - t;

      // the following correction is needed when the taskbar is
      // at the left or top and it is not "auto-hidden"
      RECT workArea;
      SystemParametersInfo(SPI_GETWORKAREA, 0, &workArea, 0);
      l += workArea.left;
      t += workArea.top;

      // make sure the window is not completely out of sight
      int max_x = GetSystemMetrics(SM_CXSCREEN) -
                     GetSystemMetrics(SM_CXICON);
      int max_y = GetSystemMetrics(SM_CYSCREEN) -
                     GetSystemMetrics(SM_CYICON);
      cs.x = min(l, max_x);
      cs.y = min(t, max_y);
}
return CFrameWnd:

reCreateWindow(cs);
}

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