在WPF中使用触发器内部的控件属性 [英] Use control properties inside triggers in WPF

问题描述

大家好，



我试图为一个按钮制作一个转换器，以便给它一个任意的背景，并且基于那个画笔（实际上，它支持只有SolidColorBrushes，LinearGradientBrushes和RadialGradientBrushes）。



我用过这段代码：

 <  样式    TargetType   = 按钮 >  
 <   Setter    属性  = 模板 < span class =code-keyword>>  
 <   Setter.Value  >  
 <   ControlTemplate     TargetType   =  {x：Type Button} >  
 <  边框    x：名称 < span class =code-keyword> =  border    BorderBrush   =  {TemplateBinding BorderBrush}    BorderThickness   =  {TemplateBinding BorderThickness}   已删除  =  {TemplateBinding Background}    SnapsToDevicePixels   =  true    CornerRadius   =  5 >  
 <   ContentPresenter     x：名称  =  contentPresenter   可聚焦  = 错误    Horizo​​ntalAlignment   =  {TemplateBinding Horizo​​ntalContentAlignment}   保证金  =  {TemplateBinding Padding}    RecognizesAccessKey   =  True    SnapsToDevicePixels   =  {TemplateBinding SnapsToDevicePixels}    VerticalAlignment   =  {TemplateBinding VerticalContentAlignment}  /  >  
 <   / Border  >  
 <   / ControlTemplate  >  
 <   / Setter.Value  >  
 <   / Setter  >  
 <  样式.Triggers  >  
 <  触发   属性  =  IsMous eOver   值  =  True >  
 <   Setter    属性  = 背景   值  =  {Binding Path = Background，Converter = {StaticResource BTHC}}    /  >  
 <   / Trigger  >  
 <   / Style.Triggers  >  
 <   / Style  >  

在样式定义中按钮。错误发生在触发器中，但我无法理解......我不知道为什么它不起作用而且根本不会以任何方式修改背景...



你能帮我解决这个问题吗？



非常感谢！



Lusvardi Gianmarco

解决方案

好的，我自己解决了这个问题：

 <   style     targettype   = 按钮 >  
 <   setter     property   = 模板 >  
 <   setter.value  >  
 <   controltemplate     targettype   =  {x：Type Button}  >  
 <   border     x：name   =  border    borderbrush   =  {TemplateBinding BorderBrush}    borderthickness   =  {TemplateBinding BorderThickness}   背景  =  {TemplateBinding Background}    snapstodevicepixels   =  true    cornerradius   =  5    tag   =  {TemplateBinding Background}    xmlns：x   = ＃unknown >  
 <   contentpresenter     x：name   =  contentPresenter    focusable   =  False     horizo​​ntalalignment   =  {TemplateBinding Horizo​​ntalContentAlignment}    margin   =  {TemplateBinding Padding}    recognaccesskey   =  True    snapstodevicepixels   =  {TemplateBinding SnapsToDevicePixels}    verticalalignment   =  {TemplateBinding VerticalContentAlignment}    /  >  
 <   / border  >  
 <   controltemplate.triggers  >  
 <  触发器    property   =  IsMouseOver    value   =  True >  
 <   setter     property   = 背景    targetname   =  border    value   =   {Binding ElementName = border，Path = Tag，Converter = {StaticResource BTHC}}    /  >  
 <   / trigger  >  
 <   trigger     property   =  IsPressed    value   =  True >  
 <   setter     property   = 背景    targetname   =  border    value   =  {Binding ElementName = border，Path = Tag，Converter = {StaticResource BTPC }     /  >  
 <   / trigger  >  
 <  触发器    property   =  IsEnabled    value   =  False >  
 <   setter     property   = 背景    targetname   =  border    value   =  {Binding ElementName = border，Path = Tag，Converter = {StaticResource BTDC}}    /  >  
  <   / trigger  >  
 <   / controltemplate.triggers  >  
 <   / controltemplate  >  
 <   / setter.value  >  
  <   / setter  >  
 <   / style  >  
 

Hi everybody,

I tried to make a converter for a button in order to give it an arbitrary background and, based on that brush (actually, it supports only SolidColorBrushes, LinearGradientBrushes and RadialGradientBrushes).

I used this code:

<Style TargetType="Button">
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type Button}">
                    <Border x:Name="border" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" removed="{TemplateBinding Background}" SnapsToDevicePixels="true" CornerRadius="5">
                        <ContentPresenter x:Name="contentPresenter" Focusable="False" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
        <Style.Triggers>
            <Trigger Property="IsMouseOver" Value="True">
                <Setter Property="Background" Value="{Binding Path=Background, Converter={StaticResource BTHC}}" />
            </Trigger>
        </Style.Triggers>
    </Style>

inside the style definition of the button. The error is in the triggers, but I cannot understand it... I do not know why it does not work and simply does not modify the background in any way...

Could you please help me sorting out this problem?

Thanks a lot!

Lusvardi Gianmarco

解决方案

Ok, I've solved it by myself:

<style targettype="Button">
    <setter property="Template">
        <setter.value>
            <controltemplate targettype="{x:Type Button}">
                <border x:name="border" borderbrush="{TemplateBinding BorderBrush}" borderthickness="{TemplateBinding BorderThickness}" background="{TemplateBinding Background}" snapstodevicepixels="true" cornerradius="5" tag="{TemplateBinding Background}" xmlns:x="#unknown">
                    <contentpresenter x:name="contentPresenter" focusable="False" horizontalalignment="{TemplateBinding HorizontalContentAlignment}" margin="{TemplateBinding Padding}" recognizesaccesskey="True" snapstodevicepixels="{TemplateBinding SnapsToDevicePixels}" verticalalignment="{TemplateBinding VerticalContentAlignment}" />
                </border>
                <controltemplate.triggers>
                    <trigger property="IsMouseOver" value="True">
                        <setter property="Background" targetname="border" value="{Binding ElementName=border, Path=Tag, Converter={StaticResource BTHC}}" />
                    </trigger>
                    <trigger property="IsPressed" value="True">
                        <setter property="Background" targetname="border" value="{Binding ElementName=border, Path=Tag, Converter={StaticResource BTPC}}" />
                    </trigger>
                    <trigger property="IsEnabled" value="False">
                        <setter property="Background" targetname="border" value="{Binding ElementName=border, Path=Tag, Converter={StaticResource BTDC}}" />
                    </trigger>
                </controltemplate.triggers>
            </controltemplate>
        </setter.value>
    </setter>
</style>

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