原文:
《Programming WPF》翻译 第9章 5.默认可视化
<?
Mapping XmlNamespace="Local" ClrNamespace="CustomControlLib"
?>
<
ResourceDictionary
xmlns
="http://schemas.microsoft.com/winfx/avalon/2005"
xmlns:x
="http://schemas.microsoft.com/winfx/xaml/2005"
xmlns:local
="Local"
>
<
Style
TargetType
="
{x:Type local:MyCustomControl}
"
>
<
Setter
Property
="Template"
>
<
Setter.Value
>
<
ControlTemplate
TargetType
="
{x:Type local:MyCustomControl}
"
>
<
Border
Background
="
{TemplateBinding Background}
"
BorderBrush
="
{TemplateBinding BorderBrush}
"
BorderThickness
="
{TemplateBinding BorderThickness}
"
>
<
ContentPresenter
/>
</
Border
>
</
ControlTemplate
>
</
Setter.Value
>
</
Setter
>
</
Style
>
</
ResourceDictionary
>
public
class
MyCustomControl : ContentControl
{
![](https://yqfile.alicdn.com/img_2887d91d0594ef8793c1db92b8a1d545.gif?x-oss-process=image/resize,w_1400/format,webp)
static MyCustomControl( ) {
ThemeStyleKeyProperty.OverrideMetadata(typeof(MyCustomControl),
new FrameworkPropertyMetadata(typeof(MyCustomControl)));
}
![](https://yqfile.alicdn.com/img_a76e9bb6ed00cf1c9c9f4ee2f04b558b.gif?x-oss-process=image/resize,w_1400/format,webp)
}
![](https://yqfile.alicdn.com/img_a6339ee3e57d1d52bc7d02b338e15a60.gif?x-oss-process=image/resize,w_1400/format,webp)
虽然为控件提供一个自定义外观的能力是有用的,开发者应该能够使用一个控件而不用必须提供自定义可视化。这个控件应该正好工作,当以它最直接的方式使用时。这意味着控件应该提供一组默认的值。
这些默认的可视化存储在组件的二进制资源中,使用的源文件为theme"generic.xaml。如果你在Visual Studio 2005中创建了一个WPF 控件库的工程,这将自动添加这个文件到你的工程中,并且设置它的Build Action为作为资源内嵌。(参见第6章获取更多关于如何在组件中编译xaml资源的信息)
在theme"generic.xaml文件中,定义一个样式,携有TargetType指定你的控件。这个样式应该通过一个ControlTemplate标签设置Template属性,为你的控件定义了默认可视化,正如示例9-17显示的。参见第5章获取更多关于如何定义一个提供了模板的样式的信息。
示例9-17
![](https://yqfile.alicdn.com/img_a6339ee3e57d1d52bc7d02b338e15a60.gif?x-oss-process=image/resize,w_1400/format,webp)
![](https://yqfile.alicdn.com/img_a6339ee3e57d1d52bc7d02b338e15a60.gif?x-oss-process=image/resize,w_1400/format,webp)
![](https://yqfile.alicdn.com/img_a6339ee3e57d1d52bc7d02b338e15a60.gif?x-oss-process=image/resize,w_1400/format,webp)
![](https://yqfile.alicdn.com/img_a6339ee3e57d1d52bc7d02b338e15a60.gif?x-oss-process=image/resize,w_1400/format,webp)
![](https://yqfile.alicdn.com/img_a6339ee3e57d1d52bc7d02b338e15a60.gif?x-oss-process=image/resize,w_1400/format,webp)
![](https://yqfile.alicdn.com/img_a6339ee3e57d1d52bc7d02b338e15a60.gif?x-oss-process=image/resize,w_1400/format,webp)
![](https://yqfile.alicdn.com/img_a6339ee3e57d1d52bc7d02b338e15a60.gif?x-oss-process=image/resize,w_1400/format,webp)
![](https://yqfile.alicdn.com/img_a6339ee3e57d1d52bc7d02b338e15a60.gif?x-oss-process=image/resize,w_1400/format,webp)
![](https://yqfile.alicdn.com/img_a6339ee3e57d1d52bc7d02b338e15a60.gif?x-oss-process=image/resize,w_1400/format,webp)
![](https://yqfile.alicdn.com/img_a6339ee3e57d1d52bc7d02b338e15a60.gif?x-oss-process=image/resize,w_1400/format,webp)
![](https://yqfile.alicdn.com/img_a6339ee3e57d1d52bc7d02b338e15a60.gif?x-oss-process=image/resize,w_1400/format,webp)
![](https://yqfile.alicdn.com/img_a6339ee3e57d1d52bc7d02b338e15a60.gif?x-oss-process=image/resize,w_1400/format,webp)
![](https://yqfile.alicdn.com/img_a6339ee3e57d1d52bc7d02b338e15a60.gif?x-oss-process=image/resize,w_1400/format,webp)
![](https://yqfile.alicdn.com/img_a6339ee3e57d1d52bc7d02b338e15a60.gif?x-oss-process=image/resize,w_1400/format,webp)
![](https://yqfile.alicdn.com/img_a6339ee3e57d1d52bc7d02b338e15a60.gif?x-oss-process=image/resize,w_1400/format,webp)
![](https://yqfile.alicdn.com/img_a6339ee3e57d1d52bc7d02b338e15a60.gif?x-oss-process=image/resize,w_1400/format,webp)
![](https://yqfile.alicdn.com/img_a6339ee3e57d1d52bc7d02b338e15a60.gif?x-oss-process=image/resize,w_1400/format,webp)
![](https://yqfile.alicdn.com/img_a6339ee3e57d1d52bc7d02b338e15a60.gif?x-oss-process=image/resize,w_1400/format,webp)
![](https://yqfile.alicdn.com/img_a6339ee3e57d1d52bc7d02b338e15a60.gif?x-oss-process=image/resize,w_1400/format,webp)
![](https://yqfile.alicdn.com/img_a6339ee3e57d1d52bc7d02b338e15a60.gif?x-oss-process=image/resize,w_1400/format,webp)
为了确定你的控件获取了默认的主体,你需要让依赖属性系统知道样式所在。如果你不这么做,你只能为你选择的基类获得默认值。示例
9-18 显示了如何这么做。示例9-18
![](https://yqfile.alicdn.com/img_405b18b4b6584ae338e0f6ecaf736533.gif?x-oss-process=image/resize,w_1400/format,webp)
![](https://yqfile.alicdn.com/img_1c53668bcee393edac0d7b3b3daff1ae.gif?x-oss-process=image/resize,w_1400/format,webp)
![](https://yqfile.alicdn.com/img_2887d91d0594ef8793c1db92b8a1d545.gif?x-oss-process=image/resize,w_1400/format,webp)
![](https://yqfile.alicdn.com/img_7a2b9a960ee9a98bfd25d306d55009f8.gif?x-oss-process=image/resize,w_1400/format,webp)
![](https://yqfile.alicdn.com/img_33d02437d135341f0800e3d415312ae8.gif?x-oss-process=image/resize,w_1400/format,webp)
![](https://yqfile.alicdn.com/img_33d02437d135341f0800e3d415312ae8.gif?x-oss-process=image/resize,w_1400/format,webp)
![](https://yqfile.alicdn.com/img_105a1e124122b2abcee4ea8e9f5108f3.gif?x-oss-process=image/resize,w_1400/format,webp)
![](https://yqfile.alicdn.com/img_33d02437d135341f0800e3d415312ae8.gif?x-oss-process=image/resize,w_1400/format,webp)
![](https://yqfile.alicdn.com/img_a76e9bb6ed00cf1c9c9f4ee2f04b558b.gif?x-oss-process=image/resize,w_1400/format,webp)
![](https://yqfile.alicdn.com/img_05dd8d549cff04457a6366b0a7c9352a.gif?x-oss-process=image/resize,w_1400/format,webp)
![](https://yqfile.alicdn.com/img_a6339ee3e57d1d52bc7d02b338e15a60.gif?x-oss-process=image/resize,w_1400/format,webp)
![](https://yqfile.alicdn.com/img_a6339ee3e57d1d52bc7d02b338e15a60.gif?x-oss-process=image/resize,w_1400/format,webp)
注意到
Visual Studio 2005 为你自动生成这段代码,当你添加一个新的自定义控件到你的控件库的工程中。