È possibile accedere al ScrollViewer interno di DataGrid modificando il modello. Sebbene normalmente non si possa inserire un gestore di eventi in codice in un modello, se si dichiara il modello in linea è possibile trattare il gestore di eventi nello stesso modo in cui si è quando lo si collega al DataGrid stesso. Questo è il modello predefinito come generata da miscela tra cui un gestore aggiunto sul ScrollViewer per l'evento RequestBringIntoView:
<ControlTemplate TargetType="{x:Type Controls:DataGrid}">
<Border SnapsToDevicePixels="True" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Padding="{TemplateBinding Padding}">
<ScrollViewer x:Name="DG_ScrollViewer" Focusable="False" RequestBringIntoView="DG_ScrollViewer_RequestBringIntoView">
<ScrollViewer.Template>
<ControlTemplate TargetType="{x:Type ScrollViewer}">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<Button Width="{Binding CellsPanelHorizontalOffset, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type Controls:DataGrid}}}" Focusable="False">
<Button.Visibility>
<Binding Path="HeadersVisibility" RelativeSource="{RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type Controls:DataGrid}}">
<Binding.ConverterParameter>
<Controls:DataGridHeadersVisibility>All</Controls:DataGridHeadersVisibility>
</Binding.ConverterParameter>
</Binding>
</Button.Visibility>
<Button.Template>
<ControlTemplate TargetType="{x:Type Button}">
<Grid>
<Rectangle x:Name="Border" Fill="{DynamicResource {x:Static SystemColors.ControlBrushKey}}" SnapsToDevicePixels="True"/>
<Polygon x:Name="Arrow" Fill="Black" Stretch="Uniform" HorizontalAlignment="Right" Margin="8,8,3,3" VerticalAlignment="Bottom" Opacity="0.15" Points="0,10 10,10 10,0"/>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Stroke" TargetName="Border" Value="{DynamicResource {x:Static SystemColors.ControlDarkBrushKey}}"/>
</Trigger>
<Trigger Property="IsPressed" Value="True">
<Setter Property="Fill" TargetName="Border" Value="{DynamicResource {x:Static SystemColors.ControlDarkBrushKey}}"/>
</Trigger>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Visibility" TargetName="Arrow" Value="Collapsed"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Button.Template>
<Button.Command>
<RoutedCommand/>
</Button.Command>
</Button>
<Custom:DataGridColumnHeadersPresenter x:Name="PART_ColumnHeadersPresenter" Grid.Column="1">
<Custom:DataGridColumnHeadersPresenter.Visibility>
<Binding Path="HeadersVisibility" RelativeSource="{RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type Controls:DataGrid}}">
<Binding.ConverterParameter>
<Controls:DataGridHeadersVisibility>Column</Controls:DataGridHeadersVisibility>
</Binding.ConverterParameter>
</Binding>
</Custom:DataGridColumnHeadersPresenter.Visibility>
</Custom:DataGridColumnHeadersPresenter>
<ScrollContentPresenter x:Name="PART_ScrollContentPresenter" Grid.ColumnSpan="2" Grid.Row="1" Content="{TemplateBinding Content}" ContentStringFormat="{TemplateBinding ContentStringFormat}" ContentTemplate="{TemplateBinding ContentTemplate}" CanContentScroll="{TemplateBinding CanContentScroll}" CanHorizontallyScroll="False" CanVerticallyScroll="False"/>
<ScrollBar x:Name="PART_VerticalScrollBar" Visibility="{TemplateBinding ComputedVerticalScrollBarVisibility}" Grid.Column="2" Grid.Row="1" Maximum="{TemplateBinding ScrollableHeight}" Value="{Binding VerticalOffset, Mode=OneWay, RelativeSource={RelativeSource TemplatedParent}}" Orientation="Vertical" ViewportSize="{TemplateBinding ViewportHeight}"/>
<Grid Grid.Column="1" Grid.Row="2">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="{Binding NonFrozenColumnsViewportHorizontalOffset, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type Controls:DataGrid}}}"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<ScrollBar x:Name="PART_HorizontalScrollBar" Visibility="{TemplateBinding ComputedHorizontalScrollBarVisibility}" Grid.Column="1" Maximum="{TemplateBinding ScrollableWidth}" Value="{Binding HorizontalOffset, Mode=OneWay, RelativeSource={RelativeSource TemplatedParent}}" Orientation="Horizontal" ViewportSize="{TemplateBinding ViewportWidth}"/>
</Grid>
</Grid>
</ControlTemplate>
</ScrollViewer.Template>
<ItemsPresenter SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
</ScrollViewer>
</Border>
fonte
2010-01-21 20:48:15
Idea molto interessante, ci provo! Grazie! :-) –
Hmm ...quello sembra uccidere le mie viste delle cellule, è quello il giusto modo di mascherare la cellula? –
btw, non è necessario utilizzare il riflettore. la fonte è disponibile su http://wpf.codeplex.com/SourceControl/list/changesets – kenwarner