OnSize

void CtestOnSizeDlg::OnSize(UINT nType, int cx, int cy){    CDialogEx::OnSize(nType, cx, cy);    // m_OldRect在构造函数里初始化为0，所以当第一个调OnSize()的    // 时候，缩放比例为1.0    int nWidth = m_OldRect.right - m_OldRect.left;    int nHeight = m_OldRect.bottom - m_OldRect.top;    CRect wndRect;    CWnd* pWnd = NULL;    double xProp = nWidth == 0 ? 1.0 : cx / (double)(nWidth);    double yProp = nHeight == 0 ? 1.0 : cy / (double)(nHeight);    // .h file defined  CDWordArray m_ctrlInfo;    // .cpp file Init    // GetClientRect(&m_OldRect);    // m_ctrlInfo.Add(ID);    // m_ctrlInfo.Add(IDC_BUTTON1);    for(int i = 0; i < m_ctrlInfo.GetSize(); i++)    {        pWnd = this->GetDlgItem(m_ctrlInfo[i]);        if(NULL == pWnd)            continue;        pWnd->GetWindowRect(&wndRect);                      // 获取控件的屏幕坐标        ScreenToClient(&wndRect);        wndRect.left = (LONG)(wndRect.left * xProp);        // 计算转换后的客户区坐标        wndRect.right = (LONG)(wndRect.right * xProp);        wndRect.top = (LONG)(wndRect.top * yProp);        wndRect.bottom = (LONG)(wndRect.bottom * yProp);        pWnd->MoveWindow(wndRect);                          // MoveWindow()是针对客户区坐标的    }    this->GetClientRect(&m_OldRect);}// 响应用户的拖动，此时窗口尚未变更大小void CtestOnSizeDlg::OnSizing(UINT fwSide, LPRECT pRect){    // fwSide 确定用户调整的方向    // 取值1-8： Left:1, Right:2, Top:3, Bottom:6, Left+Right:4    // Right+Top:5, Left+Bottom:7, Right+Bottom:8    // pRect传入传出参数确定调整后的大小    // 响应调整：根据用户调整的方向，当用户从左边调宽度时，我们也从左边调    // 同理高度也是如此    // 大小限制：当移动的大小超出我们设置的限制时，调整传入的pRect    /*if(fwSide == 2 || fwSide == 5 || fwSide == 8)    pRect->right = pRect->left + MinWidth;    else    pRect->left = pRect->right - MinWidth;    if(fwSide == 6 || fwSide == 7 || fwSide == 8)    pRect->bottom = pRect->top + MinHeight;    else    pRect->top = pRect->bottom - MinHeight;*/    if((pRect->right - pRect->left) < 500)        pRect->right = pRect->left + 500;    if((pRect->bottom - pRect->top) < 300)        pRect->bottom = pRect->top + 300;    CDialogEx::OnSizing(fwSide, pRect); }void CtestOnSizeDlg::OnGetMinMaxInfo(MINMAXINFO* lpMMI){    // 下面四行代码限制对话框的最小尺寸,最小宽度为500px，最小高度为300px    if(lpMMI->ptMinTrackSize.x <= 500)        lpMMI->ptMinTrackSize.x = 500;    if(lpMMI->ptMinTrackSize.y <= 300)        lpMMI->ptMinTrackSize.y = 300;    CDialogEx::OnGetMinMaxInfo(lpMMI);}