如何在更改文本时重新绘制静态控件？ [英] How to repaint static control on changing text?

问题描述

我处理WM_CTLCOLORSTATIC消息以为静态控制创建透明背景：

I handle WM_CTLCOLORSTATIC message to make transparent background for static control:

case WM_CTLCOLORSTATIC:
{
SetTextColor((HDC)wParam,RGB(0,0,0));
SetBkMode((HDC)wParam,TRANSPARENT);
HBRUSH return_brush = (HBRUSH)GetStockObject(NULL_BRUSH);
return (LRESULT)return_brush;
}

这样可以正常工作。

现在我尝试通过调用SendMessage（）来更改静态控制的文本。但结果是新文本放在现有文本上。我认为需要重新绘制静态控件。

如何重新绘制静态控件以及WM消息需要处理什么？

This works fine.
And now I try to change text for static control by calling SendMessage(). But in result new text is placed over the existing text. I think that need to repaint static control.
How to repaint static control and what WM messages need to handle?

推荐答案

试试这个：如何在更改文本时重新绘制静态控件？ [< a href =http://stackoverflow.com/questions/17233247/how-to-repaint-static-control-on-changing-texttarget =_ blanktitle =New Window> ^ ]

首先你需要绘制背景。 - > WMERASE_BKGROUND



http://msdn.microsoft.com/en-us/library/windows/desktop/ms648055(v = vs.85）.aspx [ ^ ]

At first you need to draw the background. -> WMERASE_BKGROUND

http://msdn.microsoft.com/en-us/library/windows/desktop/ms648055(v=vs.85).aspx[^]

尝试在窗口上调用Invalidate（）。

Try calling Invalidate() on the window.

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