如何使我的表单透明，但是我不能从中借鉴呢？ [英] How do I make my form transparent, but what I draw on it not?

问题描述

我尝试将表单的不透明度设置为50％，然后在其上绘制一个字符串。看来，我在其上绘制的字符串也具有50％的不透明度。我将如何绘制一个不透明的字符串，但让表单背景显示为50％？

I tried setting the opacity of my form to 50%, and then drawing a string on it. It seems that the string I draw on it also has an opacity of 50%. How would I draw a non transparent string , but let the form background show through 50%?

如果可能的话，我也愿意在WPF中这样做，但是我

Would also be willing to do this in WPF if it is possible, but I would need explicit instructions or an example project as I have never done it before.

为澄清起见，我希望表单背景对下面的内容是不透明的80％黑色，然后我要在其上绘制文本等。并使它显示为100％不透明。

To clarify, I want the form background to be a black 80% opaque to what is underneath, and then I want to draw text, etc.. on it and have it appear 100% opaque.

推荐答案

在WPF中轻松完成：

1. 在窗口上设置WindowStyle = None（注意：这是必需的，您不能具有透明度和标准Windows chrome）


2. 在窗口上设置AllowsTransparency = True


3. 使用透明的画笔在窗口上设置背景，例如Background = #AAFFFFFF

以下是一个快速示例：

<Window
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
Height="300" Width="300" AllowsTransparency="True" Background="#AAFFFFFF" WindowStyle="None">
<Grid>
    <TextBlock HorizontalAlignment="Center" VerticalAlignment="Center" FontSize="20" FontWeight="Bold">Hello World!</TextBlock>
</Grid>

现在显然，因为您如果禁用了标准Windows chrome，则需要提供自己的按钮才能关闭/最小化/最大化/拖动窗口。您可以自己轻松地完成此操作，也可以考虑购买类似 Blendables 之类的东西，您可以使用的Chromeless Window控件。

Now obviously, since you've disabled the standard Windows chrome, you will need to supply your own button to close/minimize/maximize/drag the window. You can do this pretty easily yourself or you could look into purchasing something like Blendables which comes with a "Chromeless Window" control that you could use.

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