如何让edit control具有不同的文本颜色和背景颜色

最新推荐文章于 2023-03-07 09:57:13 发布

原创最新推荐文章于 2023-03-07 09:57:13 发布 · 5k 阅读

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文章标签：

#class #mfc #object

本文介绍如何在MFC程序中通过CZilchDlg类的OnCtlColor方法改变静态控件的颜色，并提供了代码示例。此外，还介绍了在SDK程序中通过WM_CTLCOLOREDIT消息实现相同功能的方法。

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如果是MFC程序，优快云里有一段sample code:

Example
// This OnCtlColor handler will change the color of a static control
// with the ID of IDC_MYSTATIC. The code assumes that the CMyDialog
// class has an initialized and created CBrush member named m_brush.
// The control will be painted with red text and a background
// color of m_brush.

HBRUSH CZilchDlg::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)
{
   // Call the base class implementation first! Otherwise, it may
   // undo what we're trying to accomplish here.
   HBRUSH hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);

   // Are we painting the IDC_MYSTATIC control? We can use
   // CWnd::GetDlgCtrlID() to perform the most efficient test.
   if (pWnd->GetDlgCtrlID() == IDC_MYSTATIC)
   {
      // Set the text color to red
      pDC->SetTextColor(RGB(255, 0, 0));

      // Set the background mode for text to transparent
      // so background will show thru.
      pDC->SetBkMode(TRANSPARENT);

      // Return handle to our CBrush object
      hbr = m_brush;
   }

return hbr;
}
如果是SDK的程序，可以这样来写：

switch (message)

{

...

case WM_CTLCOLOREDIT:
  SetTextColor(reinterpret_cast<HDC>(wParam), RGB(255,0,0));//设置文本颜色为红色
  SetBkMode(reinterpret_cast<HDC>(wParam), TRANSPARENT);//这一行不能少！！！
  return reinterpret_cast<HRESULT>(hbr);//返回edit control的背景画刷

...

很简单吧