ZapPanel, FanPanal VirtualizingStackPanel

Views for WPF Forum

Posted 8 years ago by Thomas Weickmans
Version: 11.1.0541
Avatar
Hi,

I'm using version 11.1.0541.

I would like to use a FanPanel or ZapPanel to display a large number of image.
This works, but it's very slow to load. I feel that virtualization does not work.
Does anyone uses it, and if so how?


this is the code I use.
<ListView x:Name="lv" Grid.Row="1"
ItemsSource="{Binding Masks}"

ScrollViewer.IsDeferredScrollingEnabled="True" IsSynchronizedWithCurrentItem="True"
SelectionChanged="lv_SelectionChanged" Loaded="lv_Loaded" PreviewMouseWheel="lv_PreviewMouseWheel" MouseDoubleClick="lv_MouseDoubleClick"
Background="{DynamicResource {x:Static themes:DockingCommonDictionary.DockSiteBackgroundBrushKey}}" >
<ListView.ItemsPanel>
<<ItemsPanelTemplate>
<views:ZapPanel Orientation="Horizontal" VirtualizingStackPanel.IsVirtualizing="True"></views:ZapPanel>
</ItemsPanelTemplate>

</ListView.ItemsPanel>

<ListView.View>
<GridView>
<GridViewColumn Header="Picture">
<GridViewColumn.CellTemplate>
<DataTemplate>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<Image Grid.Row="0" Width="160" Height="160"
Source="{Binding Path=Path,
Converter={StaticResource myUriToImageConverterResize}}"/>
<TextBlock Grid.Row="1" Text="{Binding Id}" VerticalAlignment="Center" HorizontalAlignment="Center"/>
<TextBlock Grid.Row="2" Text="{Binding Name}" VerticalAlignment="Center" HorizontalAlignment="Center"/>
<TextBlock Grid.Row="3" Text="{Binding Manufacturer}" VerticalAlignment="Center" HorizontalAlignment="Center"/>
</Grid>

</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
</GridView>

</ListView.View>

Comments (1)

Posted 8 years ago by Actipro Software Support - Cleveland, OH, USA
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Hi Thomas,

The Views panels do not support virtualization. Setting VirtualizingStackPanel.IsVirtualizing="True" on any panel, including native WPF panels, will have no affect either. That attached property can be set on things like ListBox, whose default Styles will swap in a VirtualizingStackPanel in place of the default StackPanel.


Actipro Software Support

The latest build of this product (v2019.1 build 0683) was released 19 days ago, which was after the last post in this thread.

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