更改列表框中内容演示者的前景色 [英] Changing the Foreground colour of a contentpresenter in a listbox

问题描述

我为列表框创建了以下样式，该列表框将在某些文本旁边显示图像:

I have created the following style for a listbox that will have an image displayed next to some text:

<Style x:Key="ImageListBoxStyle" TargetType="{x:Type ListBox}">
    <Setter Property="SnapsToDevicePixels" Value="true"/>
    <Setter Property="BorderThickness" Value="1"/>
    <Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Auto"/>
    <Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto"/>
    <Setter Property="ScrollViewer.CanContentScroll" Value="True"/>
    <Setter Property="ItemContainerStyle">
        <Setter.Value>
            <!-- Simple ListBoxItem - This is used for each Item in a ListBox. The item's content is placed in the ContentPresenter -->
            <Style TargetType="{x:Type ListBoxItem}">
                <Setter Property="SnapsToDevicePixels" Value="true"/>
                <Setter Property="OverridesDefaultStyle" Value="true"/>
                <Setter Property="VerticalContentAlignment" Value="Center"/>
                <Setter Property="Template">
                    <Setter.Value>
                        <ControlTemplate TargetType="{x:Type ListBoxItem}">
                            <Grid SnapsToDevicePixels="true">
                                <Border x:Name="Border">
                                    <Grid Height="40">
                                        <Grid.ColumnDefinitions>
                                            <ColumnDefinition Width="Auto"/>
                                            <ColumnDefinition Width="*"/>
                                        </Grid.ColumnDefinitions>
                                        <Image
                                            x:Name="DisplayImage"
                                            Source="{Binding Path=ThumbnailImage}"
                                            Height="30"
                                            Width="30"
                                            Grid.Column="0"/>

                                        <ContentPresenter
                                            x:Name="DisplayText"
                                            HorizontalAlignment="Stretch"
                                            VerticalAlignment="Center"
                                            Grid.Column="1"/>
                                        <!--<ContentPresenter.Resources>
                                                <Style TargetType="{x:Type TextBlock}">
                                                    <Setter Property="Foreground" Value="Black"/>
                                                </Style>
                                            </ContentPresenter.Resources>-->

                                        <!--Content="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType=ListBox}, Path=DisplayMemberPath, Converter={StaticResource myDisplayMemberConverter}}"-->
                                        <!--<Label
                                            x:Name="Text"
                                            Content="{Binding Path=FullNameAndTitle}"
                                            Foreground="Black"
                                            VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
                                            VerticalContentAlignment="Center"
                                            HorizontalAlignment="Stretch"
                                            Grid.Column="1"
                                            Height="40"/>-->
                                    </Grid>
                                </Border>
                            </Grid>
                            <ControlTemplate.Triggers>
                                <Trigger Property="IsSelected" Value="true">
                                    <!--<Setter Property="FontWeight" Value="Bold" TargetName="DisplayText"/>-->
                                    <!--<Setter Property="Style" Value="{StaticResource SelectedTextStyle}" TargetName="DisplayText"/>-->
                                    <Setter Property="Background" Value="DarkBlue" TargetName="Border"/>
                                    <Setter Property="Width" Value="40" TargetName="DisplayImage"/>
                                    <Setter Property="Height" Value="40" TargetName="DisplayImage"/>
                                </Trigger>
                            </ControlTemplate.Triggers>
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </Style>
        </Setter.Value>
    </Setter>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type ListBox}">
                <Grid>
                    <Border x:Name="Border" Background="{TemplateBinding Background}" BorderBrush="Black" BorderThickness="{TemplateBinding BorderThickness}">
                        <Grid>
                            <ScrollViewer Margin="1,1,1,1" Focusable="false" Background="{TemplateBinding Background}" SnapsToDevicePixels="True">
                                <StackPanel IsItemsHost="true"/>
                            </ScrollViewer>
                        </Grid>
                    </Border>
                </Grid>
                <ControlTemplate.Triggers>
                    <Trigger Property="IsGrouping" Value="true">
                        <Setter Property="ScrollViewer.CanContentScroll" Value="false"/>
                    </Trigger>
                </ControlTemplate.Triggers>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

我必须使用 contentpresenter，因为我正在使用 ListBox 本身的 DisplayMemberPath 过滤显示的内容(以文本方式).

I have to use the contentpresenter as I am filtering what is displayed (text wise) using the DisplayMemberPath of the ListBox itself.

我想要做的就是在 ListBox 中选择一个项目时将 FontWeight 设置为 Bold，将 Foreground 设置为 White.

All I want to do is set the FontWeight to Bold and the Foreground to White when an item is selected in the ListBox.

有人遇到过这样的问题吗?我查看了一些相关问题，但人们已经能够使用 TextBlock 来解决他们的问题，但不幸的是我无法解决.

Has anyone encountered a problem like this? I have looked at some related questions but people have been able to use a TextBlock to get around their issues I can't unfortunately.

任何人可以提供的信息将不胜感激.

Any info ppl can give will be appreciated.

干杯

推荐答案

还有另一种方法.你可以在你的 ContentPresenter 这个属性中添加

There is also another way. You can add in your ContentPresenter this attribute

TextBlock.Foreground="YourColour"

在这种情况下，您还可以在该属性上使用动画.

In this case you can also use animations over that property.

这篇关于更改列表框中内容演示者的前景色的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！