CODEWITHSUNDEEP
c#wpfxamllistviewwindows-8
Vytautas Klumbys
Vytautas Klumbys

Reputation: 83

Visibility.Collapse doesn't fully collapse item on Win8

Im doing a filter for items in listview control. When item is supposed to be filtered out im changing visibility for that item to Visibility.Collapsed.

While in Windows 7 it works great:
Win7 http://www.imagebam.com/image/4c8cab240432140

On Windows 8 Collapsed item does not fully collapse, and leaves about ~4pixels of empty space:
Win7 http://www.imagebam.com/image/6ab32b240431990

XAML Item template:

<ListView.ItemTemplate>
    <DataTemplate DataType="ItemOfInterest">
        <DockPanel Visibility="{Binding Visible}">
            <StackPanel DockPanel.Dock="Top" Orientation="Horizontal">
                <TextBlock FontSize="15" Padding="1,0,0,0" TextWrapping="NoWrap" Text="{Binding Path=Title}" Foreground="{Binding Color}"></TextBlock>
                <TextBlock FontSize="11" Padding="10,0,0,0" VerticalAlignment="Bottom" TextWrapping="Wrap" Foreground="Gray" Text="{Binding Path=Owner}"></TextBlock>
                <TextBlock FontSize="12" Padding="10,0,0,0" VerticalAlignment="Bottom" TextWrapping="Wrap" Foreground="White" Text="{Binding Path=StashName}"></TextBlock>
                <TextBlock FontSize="11" Padding="10,0,0,0" VerticalAlignment="Bottom" TextWrapping="Wrap" Foreground="Gray" Text="{Binding Path=StashPos}"></TextBlock>
            </StackPanel>
            <TextBlock DockPanel.Dock="Bottom" FontSize="11" Padding="10,0,0,0" Visibility="{Binding DisplayExtraLine}" TextWrapping="Wrap" Foreground="Gray" Text="{Binding Path=ExtraLine}"></TextBlock>
        </DockPanel>
    </DataTemplate>
</ListView.ItemTemplate>

Any ideas what's causing this? Or the only way to bypass this, is by removing items from the list when they are being filtered out?

Upvotes: 3

Views: 1705

Answers (1)

Phil
Phil

Reputation: 42991

If you use Snoop you will be able to see that each ListViewItem is inside a Border with a height of 4. So when you collapse the DockPanel the Border still has a height of 4.

The solution is create an ItemContainerStyle and hide the Border as well as or instead of the child DockPanel.

Here's my solution. My Visible property is a bool which is why I need the converter.

<Grid.Resources>
    <Style x:Key="ItemContainerStyle" TargetType="{x:Type ListViewItem}">
        <Setter Property="Visibility" 
                Value="{Binding Visible, 
                        Converter={StaticResource BoolToVisibility}}"/>
    </Style>
</Grid.Resources>

<Grid.ColumnDefinitions>
    <ColumnDefinition/>
    <ColumnDefinition/>
</Grid.ColumnDefinitions>

<ListView ItemsSource="{Binding Items}" 
          ItemContainerStyle="{StaticResource ItemContainerStyle}">
    <ListView.ItemTemplate>
        <DataTemplate DataType="wpfSampleExplorer:ItemOfInterest">
            <DockPanel>
                <StackPanel DockPanel.Dock="Top" Orientation="Horizontal">
                    <TextBlock FontSize="15" Text="{Binding Path=Title}"/>>
                </StackPanel>
            </DockPanel>
        </DataTemplate>
    </ListView.ItemTemplate>
</ListView>

Upvotes: 6

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