MFC的的MoveWindow（INT X，诠释Y，诠释宽度，INT高度，FALSE）引起闪烁问题

Question

我有问题，MFC的（VC++）的MoveWindow（）方法，我的规格是：

• .NET运行库3.5
• VS 2008
• 的Windows XP

我通过的MoveWindow显示图像（）方法，它首先显示的图像，然后根据传递的参数进行调整。在调整过程中会出现较小的（可见的）闪烁效应。我猜这个问题是由于MoveWindow方法。请建议我最新的错误。如果您需要更多信息，请告诉我。

**代码更新日期：2011年9月7日

void CTMLead::ResizeWndToRatio(float fHeight, float fWidth) 
{ 
    CPoint TopLeft; 
    float Width; 
    float Height; 
    float Ratio; 
    int  Cx; 
    int  Cy; 
    CString tempFileName; 
    tempFileName = m_strFilename; 

    // Should we use the current window dimensions? 
    if((fHeight <= 0) || (fWidth <= 0)) 
    { 
     fHeight = (float)m_iHeight; 
     fWidth = (float)m_iWidth; 
    } 
    ASSERT((fHeight > 0) && (fWidth > 0)); 
    if((fHeight <= 0) || (fWidth <= 0)) return; 

    // Compute the aspect ratio of the current viewport 
    Ratio = fHeight/fWidth; 

    // Find the center point of the maximum viewing area 
    Cx = (m_rcMax.right/2) + m_rcMax.left; 
    Cy = (m_rcMax.bottom/2) + m_rcMax.top; 

    // If we use the maximum width allowed, is the height still small 
    // enough to fit on the screen? 
    if((m_rcMax.right * Ratio) < m_rcMax.bottom) 
    { 
     // Use the full width allowed and adjust the height 
     Width = (float)m_rcMax.right; 
     Height = Width * Ratio; 
    } 
    else 
    { 
     // Use the maximum height available and adjust the width 
     Height = (float)m_rcMax.bottom; 
     Width = Height/Ratio; 
    } 

    // Calculate the new coordinates of the upper left corner 
    TopLeft.x = Cx - (ROUND(Width)/2); 
    TopLeft.y = Cy - (ROUND(Height)/2); 

    // Update the size and offset 
    m_iLeft = TopLeft.x; 
    m_iTop = TopLeft.y; 
    m_iWidth = ROUND(Width); 
    m_iHeight = ROUND(Height); 

    m_fImageWidth=m_iWidth; 
    m_fImageHeight=m_iHeight; 
    SetDstRect(0.0f, 0.0f, m_fImageWidth, m_fImageHeight); 

    MoveWindow (m_iLeft, m_iTop, m_iWidth, m_iHeight, FALSE); 
} 

感谢，

阿里

Answer 1

你使用的MoveWindow多次或者你只是想调整一次？你是自己画画的吗？如果你是，你可以使用双缓冲来减少闪烁。否则，请尝试使用WM_CLIPSIBLINGS和WM_CLIPCHILDREN进行播放，这有时也有帮助。如果您调整了多次或多个窗口的大小，那就使用BeginDeferWindowPos（）。