Question

我有一个自定义样式，用于在ListBox中的选定项周围放置边框。但是，我在这个ListBox中放置了一个ContextMenu，当按下该项以获取上下文菜单时，它不会在所选的ListBox项周围放置边框。似乎只有当用户按下该项目然后释放ListBox项目具有边框时。当用户想要访问ContextMenu以及用户执行正常的选择项操作时，如何在两种情况下围绕ListBox项目放置边框？

电话应用程序页面资源中的样式

<phone:PhoneApplicationPage.Resources>
    <Style x:Key="MyStyle" TargetType="ListBoxItem">
        <Setter Property="Background" Value="Transparent"/>
        <Setter Property="BorderThickness" Value="0" />
        <Setter Property="Padding" Value="0" />
        <Setter Property="HorizontalContentAlignment" Value="Left"/>
        <Setter Property="VerticalContentAlignment" Value="Top"/>
        <Setter Property ="Foreground" Value="White" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="ListBoxItem">
                    <Border x:Name="LayoutRoot" Background="{TemplateBinding Background}" 
            HorizontalAlignment="{TemplateBinding HorizontalAlignment}" 
            VerticalAlignment="{TemplateBinding VerticalAlignment}" 
            BorderBrush="{TemplateBinding BorderBrush}" 
            BorderThickness="{TemplateBinding BorderThickness}">
                        <VisualStateManager.VisualStateGroups>
                            <VisualStateGroup x:Name="CommonStates">
                                <VisualState x:Name="Normal"/>
                                <VisualState x:Name="MouseOver" />
                                <VisualState x:Name="Disabled">
                                    <Storyboard>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="LayoutRoot" Storyboard.TargetProperty="Background">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource TransparentBrush}"/>
                                        </ObjectAnimationUsingKeyFrames>
                                        <DoubleAnimation Storyboard.TargetName="ContentContainer" Storyboard.TargetProperty="Opacity" Duration="0" To=".5" />
                                    </Storyboard>
                                </VisualState>
                            </VisualStateGroup>
                            <VisualStateGroup x:Name="SelectionStates">
                                <VisualState x:Name="Unselected"/>
                                <VisualState x:Name="Selected">
                                    <Storyboard>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="brd"
                                Storyboard.TargetProperty="BorderThickness">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="2" />
                                        </ObjectAnimationUsingKeyFrames>
                                    </Storyboard>
                                </VisualState>
                            </VisualStateGroup>
                        </VisualStateManager.VisualStateGroups>
                        <Border x:Name="brd" CornerRadius="10" BorderBrush="{StaticResource PhoneAccentBrush}" Width="Auto" BorderThickness="{TemplateBinding BorderThickness}">
                            <Image x:Name="recentImage" Source="{Binding Source}" Margin="12" Width="115"/>                                
                        </Border>
                        <toolkit:ContextMenuService.ContextMenu>
                            <toolkit:ContextMenu x:Name="imgListContextMenu" Background="{StaticResource PhoneChromeBrush}">
                                <toolkit:MenuItem Foreground="{StaticResource PhoneForegroundBrush}" Header="edit" Click="editContextMenuItem_Click"/>
                                <toolkit:MenuItem Foreground="{StaticResource PhoneForegroundBrush}" Header="favorite" Click="favoriteContextMenuItem_Click"/>
                                <toolkit:MenuItem Foreground="{StaticResource PhoneForegroundBrush}" Header="delete" Click="deleteContextMenuItem_Click"/>
                            </toolkit:ContextMenu>
                        </toolkit:ContextMenuService.ContextMenu>
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</phone:PhoneApplicationPage.Resources>

我的页面Grid中的ListBox

<ListBox x:Name="Recent" ItemsSource="{Binding Pictures}" Margin="8"
                     SelectionChanged="recent_SelectionChanged" toolkit:TiltEffect.IsTiltEnabled="True"
                     ItemContainerStyle="{StaticResource MyStyle}">
                <ListBox.ItemsPanel>
                    <ItemsPanelTemplate>
                        <toolkit:WrapPanel Orientation="Horizontal" />
                    </ItemsPanelTemplate>
                </ListBox.ItemsPanel> 
            </ListBox>

Answer 1

使用MouseOver州

<VisualState x:Name="MouseOver">
    <Storyboard>
        <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="BorderBrush" Storyboard.TargetName="brd">
            <DiscreteObjectKeyFrame KeyTime="0" Value="Red"/>
        </ObjectAnimationUsingKeyFrames>
    </Storyboard>
</VisualState>

按下时如何在ListBox项周围放置边框

1 个答案: