wpf 如何使 Style.Triggers 触发要应用的不同命名样式
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How to make Style.Triggers trigger a different named style to be applied
提问by vdhant
Lets say I have the below:
假设我有以下内容：
<Style TargetType="{x:Type TextBox}">
<Setter Property="BorderThickness" Value="1" />
<Setter Property="BorderBrush" Value="Gray" />
<Style.Triggers>
<Trigger Property="IsFocused" Value="true">
<Setter Property="BorderBrush" Value="Green" />
<Setter Property="BorderThickness" Value="2" />
</Trigger>
</Style.Triggers>
</Style>
This works fine and there is nothing too much wrong here, but it is a fairly simple case. What happens if I want to have the IsFocused style state listed as a exsplicit style how do reference that style as being the IsFocused style, i.e.
这工作正常，这里没有什么太大的问题，但这是一个相当简单的案例。如果我想将 IsFocused 样式状态列为显式样式，会发生什么情况如何将该样式引用为 IsFocused 样式，即
<Style x:key="ActiveStyle" TargetType="{x:Type TextBox}">
<Setter Property="BorderBrush" Value="Green" />
<Setter Property="BorderThickness" Value="2" />
</Style>
<Style TargetType="{x:Type TextBox}">
<Setter Property="BorderThickness" Value="1" />
<Setter Property="BorderBrush" Value="Gray" />
<Style.Triggers>
<Trigger Property="IsFocused" Value="true">
-- Here I want to reference ActiveStyle and not copy the copy the setters
</Trigger>
</Style.Triggers>
</Style>
采纳答案by Nicolas Dorier
I don't think you can however, you can reuse a style this way :
但是，我认为您不能，您可以通过这种方式重用样式：
<Style x:Key="ActiveStyle" TargetType="{x:Type TextBox}">
<Style.Triggers>
<Trigger Property="IsFocused" Value="true">
<Setter Property="BorderBrush" Value="Green" />
<Setter Property="BorderThickness" Value="2" />
</Trigger>
</Style.Triggers>
</Style>
<Style TargetType="{x:Type TextBox}" BasedOn="{StaticResource ActiveStyle}">
<Setter Property="BorderThickness" Value="1" />
<Setter Property="BorderBrush" Value="Gray" />
</Style>
I don't see another solution :(
我没有看到其他解决方案:(
回答by Jobi Joy
WPF is providing a special property for this FrameworkElement.FocusVisualStyle So go ahead and assign that :)
WPF 为这个 FrameworkElement.FocusVisualStyle 提供了一个特殊的属性所以继续分配它:)
<TextBox FocusVisualStyle="{StaticResource ActiveStyle}" .....
Or another way using setters
或者使用 setter 的另一种方式
<Style TargetType="{x:Type TextBox}">
<Setter Property="BorderThickness" Value="1" />
<Setter Property="BorderBrush" Value="Gray" />
<Setter Property="FocusVisualStyle" >
<Setter.Value>
<Style x:key="ActiveStyle" TargetType="{x:Type TextBox}">
<Setter Property="BorderBrush" Value="Green" />
<Setter Property="BorderThickness" Value="2" />
</Style>
</Setter.Value>
</Setter>
</Style>
回答by Tony Vitabile
There is yet a third way to do this.
还有第三种方法可以做到这一点。
Create two named control templates for your control:
为您的控件创建两个命名控件模板：
<ControlTemplate x:Key="NotFocused" TargetType="{x:Type TextBox}">
. . .
</ControlTemplate>
<ControlTemplate x:Key="Focused" TargetType="{x:Type TextBox}">
. . .
</ControlTemplate>
Then you create a default style for the TextBox with the triggers in it:
然后为 TextBox 创建一个默认样式，其中包含触发器：
<Style TargetType="{x:Type TextBox}">
<Style.Triggers>
<Trigger Property="IsFocused" Value="True">
<Setter Property="Template" Value="{StaticResource Focused}" />
</Trigger>
<Trigger Property="IsFocused" Value="False">
<Setter Property="Template" Value="{StaticResource NotFocused}" />
</Trigger>
</Style.Triggers>
</Style>
Tony
托尼
