Hello!

I'm using a `<RadCartesianChart>` with `<ScatterAreaSeries> to visualize some data as a histogram.

I'd like the user to be able to select a data point in that chart.

I've been using this guide: https://docs.telerik.com/devtools/wpf/controls/radchartview/features/behaviors/selection
but nothing seems to work.

If I add

<telerik:RadCartesianChart.Behaviors>
    <telerik:ChartSelectionBehavior />
</telerik:RadCartesianChart.Behaviors>

I still can't seem to select anything. The `SelectionChanged` event also never arrives when I click on the chart.
When I set a random point as selected programmatically via:

RadCartesianChart chart = this.GetTemplateChild("Histogram_Chart") as RadCartesianChart;
var chartSeries = (ScatterAreaSeries)chart.Series[0];
ScatterDataPoint dataPoint = chartSeries.DataPoints[10];
dataPoint.IsSelected = true;

it still doesn't change how the chart looks.

Am I missing something or is selection just not possible for ScatterAreaSeries?

Thanks in advance!

Hello. Please give an idea to start with ...

I have RadWatermarkTextBox. And I've added INotifyDataErrorInfo to my VM implementation.

When DisplayMode  is Static - I can see validation errors. But When it's Tooltip telerik:ValidationErrorTemplateHelper.DisplayMode="ToolTip"
I can't see. 

By the way. if I use static mode I also don't see red bottom border line. And red arrow at top right corner, my error text is just a black font without read rectangle around and etc.

Looks like missing styles. But I can't understand which one. I imported xaml files for Win11 style. I see that there is a definition for RadWatermarkTextBox Validation Styles.

Hello, 

im trying to set the focus on a ListBoxItem so the User can navigate to the next Index by pressing the down button.

Our current implementation is that the focus is set on the RadListBox itself and not on the item but you need to double press down to get the second item.

Is there some way to set the focus on the items itself rather than the ListBox?

 if (ListBox.SelectedItem != null)
 {
     var item = ListBox.ItemContainerGenerator.ContainerFromIndex(ListBox.SelectedIndex);
     if(item != null)
     {
         ((RadListBoxItem)item).Focus();
     }
     else
     {
         ListBox.Focus();
     }
 }

Hi,
I use windows8 theme but I need to make more clear the accent color without change the header color.
In other themes (for instance, Visual studio 2019) this option is allowed.Thank you

Luigi

Hey,

as in the titel is there a event or workaround to know if a userer startet to type inside a pdf text field. I just need it to set a bool true to inform the user that there is a possibility to lose data.

Thanks

Dominik

Hi,

I am exploring the RadCartesianChart component and would like to know if there is a way to determine the intersection point between two series. For example, I have a SplineSeries and a LineSeries, and I would like to know where they intersect. Is there a component or method to accomplish this?

I may be using the wrong component to try to achieve that?

 <telerik:RadCartesianChart x:Name="telerikChart">

     <telerik:RadCartesianChart.VerticalAxis>
         <telerik:LinearAxis Title="Distance (m)" DesiredTickCount="10"/>
     </telerik:RadCartesianChart.VerticalAxis>

     <telerik:RadCartesianChart.HorizontalAxis>
         <telerik:DateTimeContinuousAxis Title="Time (HH:mm)" LabelFormat="HH:MM" 
                                         TickOrigin="{Binding Origin}" MaximumTicks="14" MajorStepUnit="Hour" MajorStep="1"
                                         Minimum="{Binding Minimum}" Maximum="{Binding Maximum}" />
     </telerik:RadCartesianChart.HorizontalAxis>

     <telerik:RadCartesianChart.Series>
         <telerik:SplineSeries x:Name="barSerie1" CategoryBinding="Time" ValueBinding="Distance" ItemsSource="{Binding DistanceSeries}" ShowLabels="True" />
         <telerik:LineSeries x:Name="barSerie2" CategoryBinding="Time" ValueBinding="Distance" ItemsSource="{Binding AverageLineSeries}" ShowLabels="True"/>
     </telerik:RadCartesianChart.Series>

     <telerik:RadCartesianChart.Grid>
         <telerik:CartesianChartGrid MajorLinesVisibility="XY" />
     </telerik:RadCartesianChart.Grid>

 </telerik:RadCartesianChart>

Thanks for your time! 

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