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我有一个树控件,用户可以通过检查它们来选择节点。我想给用户一个选项,只显示选定的项目。扩展器覆盖Silverlight中的控件
我在想膨胀机。当用户扩展扩展器时,扩展器在原始树形控件上展开另一个仅显示所选项目的内容。
麻烦的是膨胀机只能伸展到其内容的大小。我想让扩展器充分伸展,以便在扩展器折叠之前隐藏原始树。
代码如下。画布外的树是原始树。画布内的树是扩展器应该显示的只读树
<Grid Grid.Row="1" HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
<Grid.RowDefinitions>
<RowDefinition Height="33" />
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Canvas Canvas.ZIndex="999" Grid.Row="0" HorizontalAlignment="Stretch" >
<telerik:RadExpander HorizontalAlignment="Right" ToolTipService.ToolTip="Show Selected Items"
ExpandDirection="Down" Expanded="RadExpander_Expanded" HorizontalContentAlignment="Stretch" VerticalContentAlignment="Stretch">
<telerik:RadExpander.Header>
<TextBlock
Text="Selected Items"
Width="{Binding RelativeSource={RelativeSource AncestorType=telerik:RadExpander}, Path=ActualWidth}" />
</telerik:RadExpander.Header>
<telerik:RadTreeView IsExpandOnSingleClickEnabled="True" IsLoadOnDemandEnabled="False"
Height="{Binding RelativeSource={RelativeSource AncestorType=telerik:RadExpander}, Path=ActualHeight}"
ItemTemplate="{StaticResource SelectedElementDataOnlyTemplate}" Margin="0,0,0,8"
ItemsSource="{Binding Path=SelectedElementsOnly}" x:Name="ElementsTree2" >
</telerik:RadTreeView>
</telerik:RadExpander>
</Canvas>
<telerik:RadTreeView AutomationProperties.AutomationId="ElementPicker" IsExpandOnSingleClickEnabled="True" IsVirtualizing="True"
ItemsOptionListType="None" Grid.Row="1" ItemTemplate="{StaticResource ElementDataTemplate}" IsRootLinesEnabled="True" Margin="0,0,0,8"
ItemsSource="{Binding Path=Elements}" IsLoadOnDemandEnabled="True" Visibility="{Binding ToggleSelectedElements,
Converter={StaticResource BoolToVisibilityConverter}}" LoadOnDemand="tvMain_LoadOnDemand" x:Name="ElementsTree" SelectedItem="{Binding Path=SelectedItem,Mode=TwoWay}">
</telerik:RadTreeView>
</Grid>
你可以进一步解释一下吗? – Jimmy 2013-02-25 17:52:15