我在一个具有蓝色背景的窗口上放置了一个 Expander,我想将 Expander 的按钮颜色改变为除默认颜色(来自窗口的蓝色)以外的其他颜色。 当我修改 Expander 的背景属性时,它会将整个 Expander,包括标题和所有内容都更改为新颜色。 然而,我只想改变按钮本身的颜色。 请问有谁能指出我要寻找的正确属性?
谢谢
你不仅需要重新制作Expander的模板,还需要重新制作Expander模板中的ToggleButton...以便您可以通过两个TemplateBindings将设置在Expander上的Background刷遍及到Expander的可视化对象和ToggleButton的可视化对象。
学习如何修改WPF控件的外观时,有一件事对我很有帮助,那就是使用SimpleStyles,因为这些比完整的普通样式和模板更容易复制和修改。
要做到这一点,请打开Blend并进入资产库(最底部的工具)......如果单击它,则会看到两组控件:System Controls和Simple Styles。从Simple Styles中选择一个控件(任何你想要的),然后将其放在设计区域上。然后,可以右键单击它,选择编辑控件部件(模板)和编辑副本。这将创建Simple Styles样式和模板的副本......您可以(更容易)根据自己的需求进行修改。
(在此时,我应该注意,在Visual Studio和Blend中修改由Blend生成的xaml...随着需要的反复翻转...并利用各自的优势:Blend用于其所见即所得的设计界面...和Visual Studio用于其代码编辑和IntelliSense支持。)
我已经草拟了一些快速的xaml来完成您的要求,并将其包含在下面。您应该能够将此xaml拖放到Kaxaml或其他松散的xaml编辑器中。
希望这有所帮助。
<Page
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Width="640"
Height="480"
>
<Page.Resources>
<LinearGradientBrush x:Key="NormalBrush" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#EEE" Offset="0.0"/>
<GradientStop Color="#CCC" Offset="1.0"/>
</LinearGradientBrush>
<LinearGradientBrush x:Key="NormalBorderBrush" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#CCC" Offset="0.0"/>
<GradientStop Color="#444" Offset="1.0"/>
</LinearGradientBrush>
<SolidColorBrush x:Key="GlyphBrush" Color="#444"/>
<LinearGradientBrush x:Key="MouseOverBrush" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#FFF" Offset="0.0"/>
<GradientStop Color="#AAA" Offset="1.0"/>
</LinearGradientBrush>
<LinearGradientBrush x:Key="PressedBrush" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#BBB" Offset="0.0"/>
<GradientStop Color="#EEE" Offset="0.1"/>
<GradientStop Color="#EEE" Offset="0.9"/>
<GradientStop Color="#FFF" Offset="1.0"/>
</LinearGradientBrush>
<ControlTemplate x:Key="newToggleButtonControlTemplate" TargetType="{x:Type ToggleButton}">
<Grid Background="{TemplateBinding Background}">
<Rectangle
x:Name="Rectangle"
Margin="0,0,0,0"
Fill="Transparent"
Stroke="{DynamicResource NormalBorderBrush}"
/>
<Path
x:Name="Up_Arrow"
HorizontalAlignment="Center"
VerticalAlignment="Center"
Fill="{DynamicResource GlyphBrush}"
Data="M 0 0 L 4 4 L 8 0 Z"
/>
<Path
x:Name="Down_Arrow"
Visibility="Collapsed"
HorizontalAlignment="Center"
VerticalAlignment="Center"
Fill="{DynamicResource GlyphBrush}"
Data="M 0 4 L 4 0 L 8 4 Z"
/>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="true">
<Setter Property="Fill" Value="{DynamicResource MouseOverBrush}" TargetName="Rectangle"/>
</Trigger>
<Trigger Property="IsPressed" Value="true">
<Setter Property="Fill" Value="{DynamicResource PressedBrush}" TargetName="Rectangle"/>
</Trigger>
<Trigger Property="IsChecked" Value="true">
<Setter Property="Visibility" Value="Visible" TargetName="Down_Arrow"/>
<Setter Property="Visibility" Value="Collapsed" TargetName="Up_Arrow"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
<Style x:Key="newExpanderStyle" TargetType="{x:Type Expander}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Expander}">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*" x:Name="ContentRow"/>
</Grid.RowDefinitions>
<Border
x:Name="Border"
Grid.Row="0"
BorderThickness="{TemplateBinding BorderThickness}"
CornerRadius="2,2,0,0"
>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="20"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<ToggleButton
Template="{DynamicResource newToggleButtonControlTemplate}"
Background="{TemplateBinding Background}"
IsChecked="{Binding Path=IsExpanded, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}"
OverridesDefaultStyle="True"
/>
<ContentPresenter Grid.Column="1" Margin="4" RecognizesAccessKey="True" ContentSource="Header"/>
</Grid>
</Border>
<Border
x:Name="ExpandSite"
Grid.Row="1"
Visibility="Collapsed"
BorderThickness="1,0,1,1"
CornerRadius="0,0,2,2"
>
<ContentPresenter
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
Margin="{TemplateBinding Padding}"
Focusable="false"
/>
</Border>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsExpanded" Value="True">
<Setter Property="Visibility" Value="Visible" TargetName="ExpandSite"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Page.Resources>
<Page.Background>
<LinearGradientBrush EndPoint="0.997,0.996" StartPoint="0.002,0.058">
<GradientStop Color="#FF63A6DE" Offset="0"/>
<GradientStop Color="#FFC2DEF5" Offset="1"/>
</LinearGradientBrush>
</Page.Background>
<Grid x:Name="LayoutRoot">
<Expander
Style="{DynamicResource newExpanderStyle}"
Header="Expander"
HorizontalAlignment="Left"
VerticalAlignment="Top"
Background="{DynamicResource NormalBrush}"
>
<Grid>
<Button Content="Hello World"/>
</Grid>
</Expander>
</Grid>
</Page>