我想放大scrollviewer內的一些內容。WPF縮放+滾動條?
我正在尋找的縮放行爲是RenderTransform + ScaleTransform。但這不適用於ScrollViewer。
使用LayoutTransform + ScaleTransform時,scrollviewer會受到影響(僅ContentTemplate1),但不像縮放。
假設ContentTemplate1/ContentTemplate2無法更改(即第三方控件),如何獲取縮放以使用滾動查看器?
<Grid>
<Grid.Resources>
<!-- Content type 1 -->
<DataTemplate x:Key="ContentTemplate1">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="150"/>
<ColumnDefinition />
</Grid.ColumnDefinitions>
<TextBlock Background="DodgerBlue" Text="Left"/>
<TextBlock Grid.Column="1" Background="DarkGray" Text="Right"/>
</Grid>
</DataTemplate>
<!-- Content type 2 -->
<DataTemplate x:Key="ContentTemplate2">
<Viewbox>
<TextBlock Background="DodgerBlue" Text="Scale to fit" Width="100" Height="70" Foreground="White" TextAlignment="Center"/>
</Viewbox>
</DataTemplate>
</Grid.Resources>
<Grid.RowDefinitions>
<RowDefinition />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<TabControl>
<!-- Content 1 -->
<TabControl.Resources>
<ScaleTransform x:Key="ScaleTransform"
ScaleX="{Binding ElementName=ZoomSlider,Path=Value}"
ScaleY="{Binding ElementName=ZoomSlider,Path=Value}" />
</TabControl.Resources>
<TabItem Header="Content 1">
<ScrollViewer HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto">
<ContentControl ContentTemplate="{StaticResource ContentTemplate1}" Margin="10" RenderTransformOrigin=".5,.5">
<!-- Affects scrollviewer, but does not behave like a zoom -->
<!--<FrameworkElement.LayoutTransform>
<StaticResource ResourceKey="ScaleTransform" />
</FrameworkElement.LayoutTransform>-->
<!-- Expected zoom behavior, but doesn't affect scrollviewer -->
<FrameworkElement.RenderTransform>
<StaticResource ResourceKey="ScaleTransform" />
</FrameworkElement.RenderTransform>
</ContentControl>
</ScrollViewer>
</TabItem>
<!-- Content 2 -->
<TabItem Header="Content 2">
<ContentControl ContentTemplate="{StaticResource ContentTemplate2}" Margin="10" RenderTransformOrigin=".5,.5">
<!-- Affects scrollviewer, but does not behave like a zoom -->
<!--<FrameworkElement.LayoutTransform>
<StaticResource ResourceKey="ScaleTransform" />
</FrameworkElement.LayoutTransform>-->
<!-- Expected zoom behavior, but doesn't affect scrollviewer -->
<FrameworkElement.RenderTransform>
<StaticResource ResourceKey="ScaleTransform" />
</FrameworkElement.RenderTransform>
</ContentControl>
</TabItem>
</TabControl>
<StackPanel Grid.Row="1" Orientation="Horizontal">
<!-- Zoom -->
<Slider x:Name="ZoomSlider"
Width="100"
Maximum="5"
Minimum="0.1"
Orientation="Horizontal"
Value="1" />
<!-- Autofit -->
<CheckBox Content="Autofit?" x:Name="AutoFitCheckBox" />
</StackPanel>
</Grid>
使用示例代碼瞭解它。完全按照我的意願行事。並且在手動實現IScrollInfo方面也有很好的學習經驗。 – jayars 2014-10-06 16:03:17