Dear Telerik Support Team,

I am encountering an issue with the RadGridView control in my application, which is impacting the usability for users relying on screen readers. Below, I have outlined the details of my development environment, the problem, and attached a sample project demonstrating the issue.

Issue Description:
In the attached sample project, I have implemented a simple RadGridView without any custom styling and populated it with sample data. I have observed that the focus behavior is inconsistent, particularly with the first cell in the RadGridView. When attempting to focus the first cell, only the cell itself receives focus, unlike subsequent cells where both the cell and the entire row are focused. This inconsistency results in screen readers failing to read out the content of the first cell, while they correctly read the contents of all other cells.

Upon further investigation using the Snoop utility to explore the visual tree, I noticed that the GotFocused event for the initially focused cell identifies it as being of type RadGridView, whereas, for other cells, the type is GridViewCell. This discrepancy seems to be at the root of the issue.

Attachments:
I have included a simplified, runnable standalone application that reproduces this behavior. Please find the sample project attached to this ticket.

I believe this might be a bug affecting the accessibility of the application, and I would greatly appreciate your guidance on whether this is a known issue with a workaround or if there's a fix available.

Thank you for your assistance.

Best regards,

Christian

First Tab:

Second Tab:

Hi,

Since we want to boost up the performance of the ScheduleView , we've applied the 2023_2_718 UI for WPF to enable the virtualization of the group headers with setting the property  IsGroupHeadersVirtualizationEnabled="True". However we've experienced issues also with rendering for the appointments and group headers(resources) when scrolling.

In one of the screens where the schedule view is used, the group headers don't have equal sizes, for example:

The height may vary depending on the overlapping appointments for the resource which is allowed for our system. 

There is a note that there might be issues and unexpected behavior when the headers have different sizes claimed here:

WPF ScheduleView - UI Virtualization - Telerik UI for WPF

In this scenario we experience multiple issues, like for example when scrolled at the bottom, and the schedule view is fully refreshed, the resources and appointments are not rendered :

until it's scrolled.

Also when scrolling, we experience a "blinking" rendering, the group headers change sizes on scrolling :

Can you please let us know if/when this is planned to be fixed.

Another issue not related to the header size differences is that some of the appointments are lost (not rendered)  when the height of the schedule view is changed resulting in some of the appointments to not be visible anymore .The selection is kept on the group headers, but the appointments are not rendered.

Thank you!

When the VisualizationLayer is populated with FrameworkElement objects (often through the ItemTemplate) and the MapLayer.Location value of a FrameworkElement is updated at runtime, the element itself is not moved to the new location. This happens only if the FrameworkElement is outside of the viewport during the location change action.

To work this around, on location change, remove the data element from the ItemsSource and add it again.

After using Direct2D in ChartView, zoom in/zoom out/pan ， finally shrink back to the original size. After many iterations, it is possible that the Scatter spline will be shifted, if don't use Direct2D or use the Net Framework,Such problems do not arise.

 Please check the attachment.

Hi,

I download the source code 'Telerik_UI_for_WPF_Source_2022_1_117' and then I want to run 'Build_WPF60.bat' [\Telerik_UI_for_WPF_Source_2022_1_117\Build\BatFiles]. An error occurs, see the attachment: 'Could not locate the assembly "Telerik.Windows.Documents.Core".' I tried it on Win 10 and Win 11 with installed VS202

2."

Best regards
Huráb Radek

Hello,

I want to report a bug with text color in textbox and presumably in some other controls. When the textbox is edited, then the color is correctly black:

Telerik:   Windows 11 settings textBox: 

But when the textbox loses focus, it changes the color to gray, which is hard to read and looks like disabled:

Telerik:  Windows 11 settings textBox: 

Thanks

Hi,

In project we have noticed that sometimes for RadDiagram.ConnectionManipulationCompleted we receive unexpected values in event.

This problem is not systematic but it occurs often at the drag of new connection.

To make it reproducible for you I used CustomConnectors sample project from Diagram.

For easier analysis I recorded a video with bug and changes to CustomConnectors project.

Best regards,

Bartosz

I have a Pie chart like this:

                 <telerik:RadPieChart Palette="Arctic">                    
                        <telerik:DoughnutSeries ItemsSource="{Binding GraphedStatistics, Mode=OneTime}" ValueBinding="Previous" ShowLabels="True">
                            <telerik:DoughnutSeries.LabelDefinitions>
                                <telerik:ChartSeriesLabelDefinition>
                                    <telerik:ChartSeriesLabelDefinition.Template>
                                        <DataTemplate>
                                             <StackPanel Opacity="{Binding Value, Mode=OneWay>
                                                <TextBlock Text="{Binding DataItem.Name}" HorizontalAlignment="Center" Foreground="{StaticResource textBlockForeground}"/>
                                                <TextBlock  HorizontalAlignment="Center"  Foreground="{StaticResource textBlockForeground}">
                                                    <Run Text="{Binding Value, Mode=OneWay, StringFormat=' {0:#}'}"/>
                                                    <Run Text="{Binding Percent, Mode=OneWay, StringFormat=' ({0:#}%)'}"/>
                                                </TextBlock>
                                            </StackPanel>
                                        </DataTemplate>
                                    </telerik:ChartSeriesLabelDefinition.Template>
                                </telerik:ChartSeriesLabelDefinition>
                            </telerik:DoughnutSeries.LabelDefinitions>
                        </telerik:DoughnutSeries>

If I generate a pie or doughnut chart the Percent is not updated when I update a value in the bound data source (GraphedStatistics).  Note: I am updating the observable collection not replacing it. The graph is redrawn correctly and Value updates correctly.

The version is 22.1.1.0 (not in the options below)

Updated (See that 'Monaco' is the same percentage as before the update,  Value is correct and the UI Graph is correct but the segment is clearly not 26%)

Hello,

When I do the following:

and I assign this style to my dynamically created columns from a behavior attached to the RadGridView, the style of the tooltip is the same as the style of the header.

They seem to share the same style, so that when I change one property on the header, the tooltip gets the same, and vice-versa.

Do you repro? I'm on version 2020.3.1020.45.

Thanks,

Arthur

I am using a RadTreeListView with MaterialDesign theme in a Windows WPF application. By default the selected cell is indicated by a grey line at the bottom of the cell. I don't want an indication for the selected cell and used the advise from forum to change the style as follows:

  <Style TargetType="telerik:GridViewCell" BasedOn="{StaticResource GridViewCellStyle}">
    <Setter Property="CurrentBorderBrush" Value="Transparent"/>
  </Style>

This works fine.

But if changing the Windows application with Alt+Tab and then back to my application with Alt+Tab the cell selection (grey underline) is displayed.