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在Windows Phone 7上更改ListBox的滚动条颜色

silverlightxamlwindows-phone-7listbox
6

我有一个白色背景的<ListBox>项目，我想要改变滚动条的颜色以便当用户滚动项目时能够看到它们。

我该如何实现这个呢？

2个回答
10

您可以更改滚动状态的VisualState。您想要编辑ListBox的ScrollViewer's VerticalScrollBar模板。例如，此样式为100%不透明度和红色：

<Style x:Key="ScrollViewerStyle1" TargetType="ScrollViewer">
            <Setter Property="VerticalScrollBarVisibility" Value="Auto"/>
            <Setter Property="HorizontalScrollBarVisibility" Value="Disabled"/>
            <Setter Property="Background" Value="Transparent"/>
            <Setter Property="Padding" Value="0"/>
            <Setter Property="BorderThickness" Value="0"/>
            <Setter Property="BorderBrush" Value="Transparent"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="ScrollViewer">
                        <Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}">
                            <VisualStateManager.VisualStateGroups>
                                <VisualStateGroup x:Name="ScrollStates">
                                    <VisualStateGroup.Transitions>
                                        <VisualTransition GeneratedDuration="00:00:00.5"/>
                                    </VisualStateGroup.Transitions>
                                    <VisualState x:Name="Scrolling">
                                        <Storyboard>
                                            <DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="VerticalScrollBar"/>
                                            <DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="HorizontalScrollBar"/>
                                        </Storyboard>
                                    </VisualState>
                                    <VisualState x:Name="NotScrolling"/>
                                </VisualStateGroup>
                            </VisualStateManager.VisualStateGroups>
                            <Grid Margin="{TemplateBinding Padding}">
                                <ScrollContentPresenter x:Name="ScrollContentPresenter" ContentTemplate="{TemplateBinding ContentTemplate}" Content="{TemplateBinding Content}"/>
                                <ScrollBar x:Name="VerticalScrollBar" HorizontalAlignment="Right" Height="Auto" IsHitTestVisible="False" IsTabStop="False" Maximum="{TemplateBinding ScrollableHeight}" Minimum="0" Opacity="0" Orientation="Vertical" Visibility="{TemplateBinding ComputedVerticalScrollBarVisibility}" Value="{TemplateBinding VerticalOffset}" ViewportSize="{TemplateBinding ViewportHeight}" VerticalAlignment="Stretch" Width="5" Background="Red"/>
                                <ScrollBar x:Name="HorizontalScrollBar" HorizontalAlignment="Stretch" Height="5" IsHitTestVisible="False" IsTabStop="False" Maximum="{TemplateBinding ScrollableWidth}" Minimum="0" Opacity="0" Orientation="Horizontal" Visibility="{TemplateBinding ComputedHorizontalScrollBarVisibility}" Value="{TemplateBinding HorizontalOffset}" ViewportSize="{TemplateBinding ViewportWidth}" VerticalAlignment="Bottom" Width="Auto"/>
                            </Grid>
                        </Border>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

ListBox的样式（使用上述纵向滚动条模板）如下：

<Style x:Key="ListBoxStyle1" TargetType="ListBox">
            <Setter Property="Background" Value="Transparent"/>
            <Setter Property="Foreground" Value="{StaticResource PhoneForegroundBrush}"/>
            <Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Disabled"/>
            <Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto"/>
            <Setter Property="BorderThickness" Value="0"/>
            <Setter Property="BorderBrush" Value="Transparent"/>
            <Setter Property="Padding" Value="0"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="ListBox">
                        <ScrollViewer x:Name="ScrollViewer" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Foreground="{TemplateBinding Foreground}" Padding="{TemplateBinding Padding}" Style="{StaticResource ScrollViewerStyle1}" >

                            <ItemsPresenter/>
                        </ScrollViewer>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

你可以使用 Expression Blend 来编写 XAML，因为它更高效。

@keyboardP 它有效了，起初我想改变前景。 - onmyway133
0

覆盖滚动查看器的模板。

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