We recently updated to version 2024.1.312.  After the update, we get an exception (see stack trace below) or freezing with many of our RadToggleSwitchButtons.  It seems to only affect the ones that are backstage in a RadDataForm.  I found https://feedback.telerik.com/wpf/1645011-buttons-nullreferenceexception-when-setting-ischecked-of-radtoggleswitchbutton-before-the-control-is-added-to-the-visual-tree, but the workaround suggested there doesn't work for us, even if we leave the animations enabled.

I'm using a VirtualizingWrapPanel as the ItemsPanelTemplate of a RadListBox

<telerik:RadListBox x:Name="ItemControl"
                    Grid.Row="1"
                    VirtualizingPanel.ScrollUnit="Pixel"
                    ItemsSource="{Binding RelativeSource={RelativeSource AncestorType={x:Type local:UserControl}}, Path=PathName}">

    <telerik:RadListBox.ItemsPanel>
        <ItemsPanelTemplate>
            <telerik:VirtualizingWrapPanel HorizontalAlignment="Center" ItemWidth="200" ItemHeight="180"/>
        </ItemsPanelTemplate>
    </telerik:RadListBox.ItemsPanel>

The ItemsSource is a ListCollectionView which is Live updating 

ListCollectionView = new(Models);
ListCollectionView.IsLiveSorting = true;

ListCollectionView.SortDescriptions.Add(new SortDescription("Percentage", ListSortDirection.Ascending));

The collection seems to be updating and reaching the UI; however, every so often I get empty cells in the RadListBox after a sorting happens.

If I scroll away and come back the area is filled in. Is there something I can do manually so that this area is filled in? Should I try reloading something in some way?

I've tried invalidating things in the wrap panel but this hasn't worked:

wrapPanel?.InvalidateArrange();
wrapPanel?.InvalidateMeasure();
wrapPanel?.InvalidateVisual();
wrapPanel?.UpdateLayout();

Any help or suggestions are appreciated

We would like to change the color of the highlighted items (i.e., HighlightedItemsSource) in the RadGanttView.

I know this is possible by copying and customizing the ControlTemplate, but I would like to avoid that if possible since I would need to do that for all the different types of containers.

I also know it's possible to change the color in the theme (we're using Office2019), but unfortunately, the template uses ValidationBrush for these highlights and we still want the validation to show as red in other areas of our application.

Is there any other way to change the color of the highlighted items?

If I have set the Angle Range on a RadPieChart so that I have a semicircle, is there a good way to make the remaining chart take up the entire area used for the RadPieChart or at least a good way to center it?

<telerik:RadPieChart x:Name="Chart" Background="Yellow">

    <telerik:RadPieChart.Series>

        <telerik:DoughnutSeries x:Name="DonutSeries" ShowLabels="False">

            <telerik:DoughnutSeries.DataPoints>
                <telerik:PieDataPoint Label="TestLabel1" Value="15"/>
                <telerik:PieDataPoint Label="TestLabel2" Value="50"/>
            </telerik:DoughnutSeries.DataPoints>

            <telerik:DoughnutSeries.LegendSettings>
                <telerik:DataPointLegendSettings TitleBinding="Label"/>
            </telerik:DoughnutSeries.LegendSettings>

            <telerik:DoughnutSeries.AngleRange>
                <telerik:AngleRange StartAngle="180" SweepAngle="180" SweepDirection="Clockwise"/>
            </telerik:DoughnutSeries.AngleRange>

        </telerik:DoughnutSeries>


    </telerik:RadPieChart.Series>
</telerik:RadPieChart>

Thank You!

Hello,

I'm using a RadMaskedTextInput and I'm wondering if it's possible to change the foreground color of just the placeholders?

What I'm trying to accomplish is for every X in below image to appear in a brighter color than the text typed in by the user.

What my RadMaskedTextInput looks like currently:

What I want the foreground to look like:

Is there a way to use RadGlyphs as icons for the items of a RadBreadcrumb?

Thank you.

Hi,

I am trying to change the theme through telerik StyleManager.Theme.

Not apply :

 <mynumeric:MyNumeric x:Name="TEST" Margin="-2,0,0,0"
                  Value="{Binding ViewModel.SerialNumber,Mode=TwoWay}" 
                   ValueFormat="Numeric"
                   NumberDecimalDigits="0"
                   Minimum="1" Maximum="9999"
                   telerik:StyleManager.Theme="{Binding Path=(mainwindowviewmodel:MainWindowViewModel.CurrentTheme),Converter={StaticResource ThemeToTelerikThemeConverter}}"
                   IsReadOnly="{Binding Path=(mainwindowviewmodel:MainWindowViewModel.IsManagerAccess),Converter={StaticResource InverseBooleanConverter}}"
                   >

Apply :

 <telerik:RadNumericUpDown x:Name="TEST" Margin="-2,0,0,0"
                  Value="{Binding ViewModel.SerialNumber,Mode=TwoWay}" 
                   ValueFormat="Numeric"
                   NumberDecimalDigits="0"
                   Minimum="1" Maximum="9999"
                   telerik:StyleManager.Theme="{Binding Path=(mainwindowviewmodel:MainWindowViewModel.CurrentTheme),Converter={StaticResource ThemeToTelerikThemeConverter}}"
                   IsReadOnly="{Binding Path=(mainwindowviewmodel:MainWindowViewModel.IsManagerAccess),Converter={StaticResource InverseBooleanConverter}}"
                   >

public class MyNumeric : RadNumericUpDown
{
    public override string FormatDisplay()
    {
        if (this.Value.HasValue)
        {
            return this.Value.Value.ToString("0000");
        }
        return base.FormatDisplay();
    }

    public override string FormatEdit()
    {
        if (this.Value.HasValue)
        {
            return this.Value.Value.ToString("0000");
        }
        return base.FormatEdit();
    }
}

internal class ThemeToTelerikThemeConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        if (!Enum.IsDefined(typeof(Wpf.Ui.Appearance.ThemeType), value))
            throw new ArgumentException("ExceptionEnumToBooleanConverterValueMustBeAnEnum");

        switch (value)
        {
            case Wpf.Ui.Appearance.ThemeType.Light:
                return "Office2019";
            case Wpf.Ui.Appearance.ThemeType.Dark:
                return "Expression_Dark";

            default:
                return "Office2019";
        }
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}

I'll appreciate any help.

Hello,

            I want to update the node and connector after giving the GraphDatasource in the "RadDiagram", 

           Because I want to used different nodes and different style connectors together in diagram.

I have to scrub pasted fragments from web sources to remove any hyperlinks in those fragments but keep the text associated with the link if any.  I have tried the following code which gets the proper hyperlink elements, but this is not removing the hyperlink info.   Please let me know the proper method of finding all hyperlinks in the pasted document content and removing those links.  Thanks.

            var richTextBox = new RadRichTextBox();
            richTextBox.InsertFragment(document.Selection.CopySelectedDocumentElements());
            richTextBox.Document.Selection.SelectAll();

            var boxes = richTextBox.Document.Selection.GetSelectedBoxes().Where(b => b.AssociatedInline.FieldStart != null && b.AssociatedInline.FieldStart.GetType() == typeof(HyperlinkRangeStart));
            foreach (var box in boxes)
            {
                richTextBox.Document.CaretPosition.MoveToInline(box.AssociatedInline);
                richTextBox.RemoveHyperlink();
            }