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IDProjectCategoryView StatusDate SubmittedLast Update
0001745NoesisGUIC++ SDKpublic2020-07-02 10:172020-07-06 13:43
ReporterExt3hAssigned Tosfernandez 
PrioritynormalSeverityminorReproducibilityalways
Status resolvedResolutionfixed 
Product Version3.0.2 
Target Version3.0.3Fixed in Version3.0.3 
Summary0001745: VirtualizingPanel.VirtualizationMode=Recycling breaks TextElement.FontFamily inheritence
DescriptionGot the hirarchy shown in attached tree.png, defined by the following declaration


    <Style x:Key="VirtualList" TargetType="{x:Type ItemsControl}" BasedOn="{StaticResource {x:Type ItemsControl}}">
        <Setter Property="OverridesDefaultStyle" Value="False"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate>
                    <Border
                        BorderThickness="{TemplateBinding Border.BorderThickness}"
                        Padding="{TemplateBinding Control.Padding}"
                        BorderBrush="{TemplateBinding Border.BorderBrush}"
                        Background="{TemplateBinding Panel.Background}">
                        <ScrollViewer x:Name="PART_Scroll"
                            Padding="{TemplateBinding Control.Padding}"
                            Focusable="False">
                            <ItemsPresenter />
                        </ScrollViewer>
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
        <Setter Property="ItemsPanel">
            <Setter.Value>
                <ItemsPanelTemplate>
                    <VirtualizingStackPanel/>
                </ItemsPanelTemplate>
            </Setter.Value>
        </Setter>
        <Setter Property="ScrollViewer.CanContentScroll" Value="True"/>
        <Setter Property="VirtualizingPanel.IsVirtualizing" Value="True"/>
        <!-- Recycling would be better, but Noesis appears to have a data race in the bindings -->
        <Setter Property="VirtualizingPanel.VirtualizationMode" Value="Recycling"/>
        <Setter Property="VirtualizingPanel.ScrollUnit" Value="Pixel"/>
    </Style>

    <DataTemplate x:Key="GnomeScheduleButtonTemplate">
        <Button x:Name="Sched_Button"
            Content="{Binding Activity}"
            Style="{StaticResource GnomeScheduleButtonStyle}"
            Command="{Binding CmdSetHour}" />
    </DataTemplate>
        
    <DataTemplate x:Key="PopGnomeSchedRowTemplate">
        <ItemsControl ItemsSource="{Binding Schedule}" ItemTemplate="{StaticResource GnomeScheduleButtonTemplate}" Height="35">
            <ItemsControl.ItemsPanel>
                <ItemsPanelTemplate>
                    <StackPanel Orientation="Horizontal"/>
                </ItemsPanelTemplate>
            </ItemsControl.ItemsPanel>
        </ItemsControl>
    </DataTemplate>

         <ItemsControl x:Name="SVActivities"
             ItemsSource="{Binding Schedules}" ItemTemplate="{StaticResource PopGnomeSchedRowTemplate}"
             Grid.Row="1" Grid.Column="1" Style="{StaticResource VirtualList}"
             ScrollViewer.VerticalScrollBarVisibility="Auto">
         </ItemsControl>

The issue occurs on the highlighted element. After the element has been *recycled*, the inherited TextElement.FontFamily for the inner (not virtualized) ContentPresenter node becomes empty.
When this happens, it impacts all children of the inner ItemsControl. The inner ItemsControl itself still has a sensible value for FontFamily (also inherited) in that state, according to the inspector, but inheritence from it is broken.

Setting and clearing a local value for TextElement.FontFamily on the broken ContentPresenter node restores the correctly inherited values, both according to inspector and visually confirmed.
TagsNo tags attached.
PlatformWindows

Activities

Ext3h

Ext3h

2020-07-02 10:17

reporter  

tree.png (119,522 bytes)
tree.png (119,522 bytes)

Issue History

Date Modified Username Field Change
2020-07-02 10:17 Ext3h New Issue
2020-07-02 10:17 Ext3h File Added: tree.png
2020-07-06 10:50 sfernandez Assigned To => sfernandez
2020-07-06 10:50 sfernandez Status new => assigned
2020-07-06 10:50 sfernandez Target Version => 3.0.3
2020-07-06 13:43 sfernandez Status assigned => resolved
2020-07-06 13:43 sfernandez Resolution open => fixed
2020-07-06 13:43 sfernandez Fixed in Version => 3.0.3