如何使 CStatic 控件 (MFC) 透明?

2022-01-12 00:00:00 windows dialog winapi mfc

我的应用程序有一个带有填充整个对话框的图像的开始对话框.另外还有一个 CStatic 控件，它为用户显示一些可变信息.我使用以下代码使 CStatic 控件透明:

My application has a start dialog with an image which fills the whole dialog. Additionaly there is a CStatic control, which displays some variable information for the user. I made the CStatic control transparent with following code:

HBRUSH CStartbildDlg::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)
{
    if(pWnd->GetDlgCtrlID() == IDC_STATIC_INFO)
    {
        pDC->SetBkMode(TRANSPARENT);
        return reinterpret_cast<HBRUSH>(::GetStockObject(NULL_BRUSH));
    }
    else
        return CDialog::OnCtlColor(pDC, pWnd, nCtlColor);
}

当我用 GetDlgItem(IDC_STATIC_INFO)->SetWindowText 更改静态控件的文本时，新文本会与旧文本重叠(旧文本不会被删除).我曾尝试在使用 GetDlgItem(IDC_STATIC_BILD)->Invalidate() 调用 SetWindowText 图像之前重新绘制背景，但随后没有显示任何信息文本(既不是旧的也不是新).

When I change the text of the static control with GetDlgItem(IDC_STATIC_INFO)->SetWindowText, the new text overlaps the old text (the old text is not deleted). I have tried to repaint the background befor calling SetWindowText image with GetDlgItem(IDC_STATIC_BILD)->Invalidate(), but then no info text is shown (neither the old nor the new).

您知道如何使静态控件透明，以便我也可以用新文本覆盖它吗?

Do you know how I can make the static control transparent, so that I also can override it with a new text?

感谢您的帮助！

解决方案:来自 Sanja 的 codeproject-link 的方法 2(改编)对我有用.

Solution: Method 2 (adapted) from the codeproject-link from Sanja worked for me.

GetDlgItem(IDC_STATIC_INFO)->SetWindowText(tmp);
CRect rect;
GetDlgItem(IDC_STATIC_INFO)->GetWindowRect(&rect);
ScreenToClient(&rect);
InvalidateRect(&rect);
UpdateWindow();

推荐答案

你好，你可以找到透明静态示例 这里

Hi you can find transparent static sample here

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