Cannot set foreground using item container style selector?

[Adnan]

I am trying to set the Foreground color of selected RadTreeViewItem but it cannot be set, though, other elements like Background is working.

<UserControl>

<UserControl.Resources>

<DataTemplate x:Key="AdvancedVariableTemplate">

            <RadioButton Checked="itemCont

<ResourceDictionary>

<!-- ItemContainerStyleSelector -->
<Style x:Key="AdvancedVariableItemContainerStyle" TargetType="telerik:RadTreeViewItem" BasedOn="{StaticResource RadTreeViewItemStyle}">
        <Setter Property="Background" Value="Red"/>
        <Setter Property="Foreground" Value="Green"/>
</Style>
</ResourceDictionary>

class AdvVariableContainerStyleSelector : StyleSelector
    {
        private Style darkThemeStyle;
        private Style lightThemeStyle;

        public override Style SelectStyle(object item, DependencyObject container)
        {
            Configuration config = UserConfigurations.getConfig();
            if (config.AppSettings.Settings["CurrentTheme"] != null)
            {
                switch (config.AppSettings.Settings["CurrentTheme"].Value.ToString().ToUpper())
                {
                    case "LIGHT":
                        return lightThemeStyle;
                    case "STANDARD":
                        return lightThemeStyle;
                    case "DARK":
                        return darkThemeStyle;
                    default:
                        return null;
                }
            }
            else
                return null;
        }

        public Style DarkThemeStyle
        {
            get
            {
                return this.darkThemeStyle;
            }
            set
            {
                this.darkThemeStyle = value;
            }
        }

        public Style LightThemeStyle
        {
            get
            {
                return this.lightThemeStyle;
            }
            set
            {
                this.lightThemeStyle = value;
            }
        }
    }

ainerRadio_Checked" Content="{Binding CustomName}" ToolTip="{Binding TooltipString}"/>

        </DataTemplate>

        <HierarchicalDataTemplate x:Key="AdvancedGroupSeriesRadioTemplate" ItemsSource="{Binding LstAppDataSeries}">

            <TextBlock Text="{Binding CustomName}" FontWeight="Bold" />

        </HierarchicalDataTemplate>

        <HierarchicalDataTemplate x:Key="AdvancedGroupSideTemplate" ItemsSource="{Binding  LstAppDataSeriesSides}">

            <TextBlock Text="{Binding CustomName}" FontWeight="Bold"/>

        </HierarchicalDataTemplate>

        <VariablesGroup:VariablesHierarchicalTemplate x:Key="AdvancedVariableItemTemplate"

            VariablesGroupsTemplate="{StaticResource  AdvancedGroupSideTemplate}"

            VariableSideTemplate="{StaticResource AdvancedGroupSeriesRadioTemplate}"

            VariableTemplate="{StaticResource AdvancedVariableTemplate}"/>

        <VariablesGroup:AdvVariableContainerStyleSelector x:Key="AdvancedVariableStyleSelector"

            DarkThemeStyle="{StaticResource AdvancedVariableItemContainerStyle}"

            LightThemeStyle="{StaticResource AdvancedVariableItemContainerStyle}"/>

    </UserControl.Resources>

<Grid>

<telerik:RadTreeView x:Name="lstVariablesAdvanced" SelectedItem="{DynamicResource AdvancedVariableItemContainerStyle}" VerticalAlignment="Stretch" Grid.Row="1" Grid.ColumnSpan="2" BorderThickness="0,0,0,0" ScrollViewer.CanContentScroll="False"

IsEditable="True" SelectionMode="Extended" ItemsSource="{Binding LstAppDataSeriesGrouping}" IsDropPreviewLineEnabled="False" IsDragPreviewEnabled="True"

IsDragTooltipEnabled="False" MouseDown="lstVariablesAdvanced_MouseDown"

IsSingleExpandPath="True" IsExpandOnSingleClickEnabled="False"  IsDragDropEnabled="False"

PreviewKeyDown="lstVariables_PreviewKeyDown" IsLineEnabled="True"

ItemTemplateSelector="{StaticResource AdvancedVariableItemTemplate}"

ItemContainerStyleSelector="{StaticResource AdvancedVariableStyleSelector}"             

Margin="10,0,6,0">

</telerik:RadTreeView>

</Grid>

</UserControl>

[Adnan]

Formatted code.

<UserControl>
<UserControl.Resources>
<DataTemplate x:Key="AdvancedVariableTemplate">
            <RadioButton Checked="itemContainerRadio_Checked" Content="{Binding CustomName}" ToolTip="{Binding TooltipString}"/>
        </DataTemplate>
        <HierarchicalDataTemplate x:Key="AdvancedGroupSeriesRadioTemplate" ItemsSource="{Binding LstAppDataSeries}">
            <TextBlock Text="{Binding CustomName}" FontWeight="Bold" />
        </HierarchicalDataTemplate>
        <HierarchicalDataTemplate x:Key="AdvancedGroupSideTemplate" ItemsSource="{Binding  LstAppDataSeriesSides}">
            <TextBlock Text="{Binding CustomName}" FontWeight="Bold"/>
        </HierarchicalDataTemplate>
        <VariablesGroup:VariablesHierarchicalTemplate x:Key="AdvancedVariableItemTemplate"
            VariablesGroupsTemplate="{StaticResource  AdvancedGroupSideTemplate}"
            VariableSideTemplate="{StaticResource AdvancedGroupSeriesRadioTemplate}"
            VariableTemplate="{StaticResource AdvancedVariableTemplate}"/>
        <VariablesGroup:AdvVariableContainerStyleSelector x:Key="AdvancedVariableStyleSelector"
            DarkThemeStyle="{StaticResource AdvancedVariableItemContainerStyle}"
            LightThemeStyle="{StaticResource AdvancedVariableItemContainerStyle}"/>
    </UserControl.Resources>
<Grid>
<telerik:RadTreeView x:Name="lstVariablesAdvanced" SelectedItem="{DynamicResource AdvancedVariableItemContainerStyle}" VerticalAlignment="Stretch" Grid.Row="1" Grid.ColumnSpan="2" BorderThickness="0,0,0,0" ScrollViewer.CanContentScroll="False"
IsEditable="True" SelectionMode="Extended" ItemsSource="{Binding LstAppDataSeriesGrouping}" IsDropPreviewLineEnabled="False" IsDragPreviewEnabled="True"
IsDragTooltipEnabled="False" MouseDown="lstVariablesAdvanced_MouseDown"
IsSingleExpandPath="True" IsExpandOnSingleClickEnabled="False"  IsDragDropEnabled="False"
PreviewKeyDown="lstVariables_PreviewKeyDown" IsLineEnabled="True"
ItemTemplateSelector="{StaticResource AdvancedVariableItemTemplate}"
ItemContainerStyleSelector="{StaticResource AdvancedVariableStyleSelector}"
Margin="10,0,6,0">
</telerik:RadTreeView>
</Grid>
</UserControl>

<ResourceDictionary>

<!-- ItemContainerStyleSelector -->
<Style x:Key="AdvancedVariableItemContainerStyle" TargetType="telerik:RadTreeViewItem" BasedOn="{StaticResource RadTreeViewItemStyle}">
        <Setter Property="Background" Value="Red"/>
        <Setter Property="Foreground" Value="Green"/>
</Style>
</ResourceDictionary>

class AdvVariableContainerStyleSelector : StyleSelector
    {
        private Style darkThemeStyle;
        private Style lightThemeStyle;

        public override Style SelectStyle(object item, DependencyObject container)
        {
            Configuration config = UserConfigurations.getConfig();
            if (config.AppSettings.Settings["CurrentTheme"] != null)
            {
                switch (config.AppSettings.Settings["CurrentTheme"].Value.ToString().ToUpper())
                {
                    case "LIGHT":
                        return lightThemeStyle;
                    case "STANDARD":
                        return lightThemeStyle;
                    case "DARK":
                        return darkThemeStyle;
                    default:
                        return null;
                }
            }
            else
                return null;
        }

        public Style DarkThemeStyle
        {
            get
            {
                return this.darkThemeStyle;
            }
            set
            {
                this.darkThemeStyle = value;
            }
        }

        public Style LightThemeStyle
        {
            get
            {
                return this.lightThemeStyle;
            }
            set
            {
                this.lightThemeStyle = value;
            }
        }
    }

[Dinko | Tech Support Engineer]

Hi Adnan,

As it is quite hard to reproduce your case, I could suggest you bind the needed Foregrounds of the TextBlocks and RadioButtons to the Foreground of the RadTreeViewItem or to the Foreground of its ContentPresenter via something like:

Foreground="{Binding RelativeSource={RelativeSource AncestorType={x:Type telerik:RadTreeViewItem}}, Path=Foreground}"

or

Foreground="{Binding RelativeSource={RelativeSource AncestorType=ContentPresenter}, Path=(TextElement.Foreground)}"

so they can get the value from the Setter in the custom style. Give this approaches a try and let us know if they work for you.

Regards,
Dinko
Telerik by Progress