Question

如何选择样式列表框，使选择的文本颜色与默认视图不同？我在几个方面看过这个，因为ContentPresenter缺少Foreground属性。

列表框的默认控件模板提供了几个可用于调整高亮颜色的矩形。例如，对于默认样式，名为BGColor3的矩形调整其不透明度以获得高光效果。

以下是我的控制模板的大部分内容：

<Grid>
    <Rectangle x:Name="BGColor2" Fill="{StaticResource HoverBrush}" Stroke="Black" StrokeThickness="1" Opacity="0"/>
    <Rectangle x:Name="BGColor3" Fill="{StaticResource ListboxHighlightBrush}" StrokeThickness="0" Opacity="0"/>
    <Rectangle x:Name="BGColor" Stroke="Black" StrokeThickness="0" Opacity="0.2" Fill="{TemplateBinding Background}"/>
    <Border Height="20">
        <ContentPresenter HorizontalAlignment="Left" Margin="{TemplateBinding Padding}" x:Name="contentPresenter" Content="{TemplateBinding Content}" ContentTemplate="{TemplateBinding ContentTemplate}"/>
    </Border>
    <Rectangle Fill="Blue" Opacity="0.4" x:Name="FocusVisual" Stroke="#BF313131" Margin="1" StrokeThickness="1" StrokeDashArray="1 2" StrokeDashCap="Square" Visibility="Collapsed" />
    <Rectangle x:Name="BorderRect" Stroke="Black" StrokeThickness="1" Opacity="0.3" />
</Grid>

在选择视觉状态中，这是要点：

<VisualStateGroup x:Name="SelectionStates">
    <VisualState x:Name="Unselected"/>
    <VisualState x:Name="Selected">
        <Storyboard>
            <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Duration="00:00:00.0010000" Storyboard.TargetName="BGColor2" Storyboard.TargetProperty="(UIElement.Opacity)">
                <SplineDoubleKeyFrame KeyTime="00:00:00" Value="0.8"/>
            </DoubleAnimationUsingKeyFrames>
        </Storyboard>
    </VisualState>
</VisualStateGroup>

显而易见的是，BGColor2正在修改矩形（不透明度），以便所选项目具有背景。很公平。在故事板的这一部分中，无论如何都可以访问ContentPresenter或类似的其他内容并切换文本前景色？

脚注：简单地使用不同的模板与视觉状态转换不是更清晰吗？

----在给出第一个答案后添加----

使用TextBlock 几乎可以解决这个问题，但有趣的是，SelectedUnfocused的转换似乎没有得到强制执行，也就是说实现你的解决方案是完美的，直到一个人将鼠标放在之前选择的项目然后文本再次变为黑色。

这是我的模板：

<!-- ItemStyle brushes -->
<SolidColorBrush x:Key="BaseColorBrush" Color="White"/>
<SolidColorBrush x:Key="BaseColorBrushFaint" Color="#265B0000"/>
<SolidColorBrush x:Key="ForegroundColorBrush" Color="#FFFFFFFF"/>
<SolidColorBrush x:Key="HoverBrush2" Color="#FF808000"/>
<LinearGradientBrush x:Key="HoverBrush"  EndPoint="0.5,1" StartPoint="0.5,0">
    <GradientStop Color="#FF406DC7" Offset="1"/>
    <GradientStop Color="#FF002C83"/>
</LinearGradientBrush>

<LinearGradientBrush x:Key="ListboxHighlightBrush" EndPoint="0.5,1" StartPoint="0.5,0">
    <GradientStop Color="#FF7CA8FF" Offset="1"/>
    <GradientStop Color="#FF376FDC"/>
</LinearGradientBrush>

<SolidColorBrush x:Key="HyperlinkBrush" Color="#FFC8A1A1"/>

<!-- Search Listbox ItemStyle -->
<Style x:Key="ItemStyle" TargetType="ListBoxItem">
    <Setter Property="Padding" Value="4"/>
    <Setter Property="HorizontalContentAlignment" Value="Left"/>
    <Setter Property="VerticalContentAlignment" Value="Top"/>
    <Setter Property="Background" Value="{StaticResource BaseColorBrush}"/>
    <Setter Property="BorderBrush" Value="{StaticResource HoverBrush}"/>
    <Setter Property="Foreground" Value="#FF333333"/>
    <Setter Property="BorderThickness" Value="1"/>
    <Setter Property="TabNavigation" Value="Local"/>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="ListBoxItem">
                <Grid>
                    <VisualStateManager.VisualStateGroups>
                        <VisualStateGroup x:Name="CommonStates">
                            <VisualState x:Name="Normal"/>
                            <VisualState x:Name="MouseOver">
                                <Storyboard>
                                    <DoubleAnimation Storyboard.TargetName="BGColor3" Storyboard.TargetProperty="Opacity" Duration="0" To="1"/>
                                    <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Duration="00:00:00.0010000" Storyboard.TargetName="BGColor" Storyboard.TargetProperty="(UIElement.Opacity)">
                                        <SplineDoubleKeyFrame KeyTime="00:00:00" Value="0.3"/>
                                    </DoubleAnimationUsingKeyFrames>
                                    <ColorAnimationUsingKeyFrames BeginTime="00:00:00" Duration="00:00:00.0010000" Storyboard.TargetName="contentPresenter" Storyboard.TargetProperty="(TextBlock.Foreground).(SolidColorBrush.Color)">
                                        <EasingColorKeyFrame KeyTime="00:00:00" Value="White"/>
                                    </ColorAnimationUsingKeyFrames>
                                </Storyboard>
                            </VisualState>
                            <VisualState x:Name="Disabled">
                                <Storyboard>
                                    <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Duration="00:00:00.0010000" Storyboard.TargetName="contentPresenter" Storyboard.TargetProperty="(UIElement.Opacity)">
                                        <SplineDoubleKeyFrame KeyTime="00:00:00" Value="0.55"/>
                                    </DoubleAnimationUsingKeyFrames>
                                </Storyboard>
                            </VisualState>
                        </VisualStateGroup>
                        <VisualStateGroup x:Name="SelectionStates">
                            <VisualState x:Name="Unselected"/>
                            <VisualState x:Name="Selected">
                                <Storyboard>
                                    <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Duration="00:00:00.0010000" Storyboard.TargetName="BGColor2" Storyboard.TargetProperty="(UIElement.Opacity)">
                                        <SplineDoubleKeyFrame KeyTime="00:00:00" Value="0.9"/>
                                    </DoubleAnimationUsingKeyFrames>
                                    <ColorAnimationUsingKeyFrames BeginTime="00:00:00" Duration="00:00:00.0010000" Storyboard.TargetName="contentPresenter" Storyboard.TargetProperty="(TextBlock.Foreground).(SolidColorBrush.Color)">
                                        <EasingColorKeyFrame KeyTime="00:00:00" Value="White"/>
                                    </ColorAnimationUsingKeyFrames>
                                </Storyboard>
                            </VisualState>
                            <VisualState x:Name="SelectedUnfocused">
                                <Storyboard>
                                    <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Duration="00:00:00.0010000" Storyboard.TargetName="BGColor2" Storyboard.TargetProperty="(UIElement.Opacity)">
                                        <SplineDoubleKeyFrame KeyTime="00:00:00" Value="0.9"/>
                                    </DoubleAnimationUsingKeyFrames>
                                    <ColorAnimationUsingKeyFrames BeginTime="00:00:00" Duration="00:00:00.0010000" Storyboard.TargetName="contentPresenter" Storyboard.TargetProperty="(TextBlock.Foreground).(SolidColorBrush.Color)">
                                        <EasingColorKeyFrame KeyTime="00:00:00" Value="#FFFFFFFF"/>
                                    </ColorAnimationUsingKeyFrames>
                                </Storyboard>
                            </VisualState>
                        </VisualStateGroup>
                        <VisualStateGroup x:Name="FocusStates">
                            <VisualState x:Name="Focused">
                                <Storyboard>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="FocusVisual" Storyboard.TargetProperty="Visibility" Duration="0">
                                        <DiscreteObjectKeyFrame KeyTime="0">
                                            <DiscreteObjectKeyFrame.Value>
                                                <Visibility>Visible</Visibility>
                                            </DiscreteObjectKeyFrame.Value>
                                        </DiscreteObjectKeyFrame>
                                    </ObjectAnimationUsingKeyFrames>
                                    <ColorAnimationUsingKeyFrames BeginTime="00:00:00" Duration="00:00:00.0010000" Storyboard.TargetName="contentPresenter" Storyboard.TargetProperty="(TextBlock.Foreground).(SolidColorBrush.Color)">
                                        <EasingColorKeyFrame KeyTime="00:00:00" Value="White"/>
                                    </ColorAnimationUsingKeyFrames>
                                </Storyboard>
                            </VisualState>
                            <VisualState x:Name="Unfocused">
                                <Storyboard/>
                            </VisualState>
                        </VisualStateGroup>
                    </VisualStateManager.VisualStateGroups>
                    <Rectangle x:Name="BGColor2" Fill="{StaticResource HoverBrush}" Stroke="Black" StrokeThickness="0" Opacity="0"/>
                    <Rectangle x:Name="BGColor3" Fill="{StaticResource ListboxHighlightBrush}" StrokeThickness="0" Opacity="0"/>
                    <Rectangle x:Name="BGColor" Stroke="Black" StrokeThickness="0" Opacity="0.3" Fill="{TemplateBinding Background}"/>
                    <Border Height="20">
                        <TextBlock Canvas.ZIndex="22" x:Name="contentPresenter" Foreground="{TemplateBinding Foreground}"
                            Text="{TemplateBinding Content}" HorizontalAlignment="{TemplateBinding 
                            HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" />
                    </Border>
                    <Rectangle  Opacity="0.4" x:Name="FocusVisual" Stroke="#BF313131" Margin="1" StrokeThickness="1" StrokeDashArray="1 2" StrokeDashCap="Square" Visibility="Collapsed" />
                    <Rectangle x:Name="BorderRect" Stroke="Black" StrokeThickness="0" Opacity="0.3" />
                </Grid>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

我对模板的消费：

    <ListBox ItemContainerStyle="{StaticResource ItemStyle}" x:Name="testListBox" />

最后填写列表框的一些代码：

            List<string> data = new List<string>();
            for (int i = 0; i < 30; i++) { 
                data.Add(DateTime.Now.AddDays(i).ToString("MMMM dd yyyy"));
            }           
            testListBox.ItemsSource = data;

Answer 1

将模板中的ContentPresenter更改为ContentControl，该ContentControl具有可以使用TemplateBind的Foreground属性。

Answer 2

我尝试了你的方案。默认情况下，默认列表项的内容是黑色字符串。列表框项目具有您可以设置的前景属性，但我不确定它在模板中的位置。他们为字符串做了一些特殊的事情来使用前景但没有在模板中公开它。你可能想要尝试的一个黑客，如果你知道你将总是有字符串内容，用一个文本块替换controltemplate的contentpresenter，它具有forground。（要编辑ListItem的模板，请在Blend3中右键单击它，然后转到编辑模板，编辑副本，然后修改新样式}

<ContentPresenter x:Name="contentPresenter" 
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
Margin="{TemplateBinding Padding}" Content="{TemplateBinding Content}"
ContentTemplate="{TemplateBinding ContentTemplate}" />

到

<TextBlock x:Name="contentPresenter" Foreground="{TemplateBinding Foreground}"
Text="{TemplateBinding Content}" HorizontalAlignment="{TemplateBinding 
HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" />

我添加了TextBinding for Text和Foreground。你应该能够在视觉状态中操纵前景，以使正确的状态看起来被禁用，被选中等等。我希望这会有所帮助。

Silverlight列表框项目样式

2 个答案: