Hi All! Here is what I'm trying to achieve with the RadNavigationView (RNV):

• Main content is full screen map in the background and through the RNV would toggle different overlays or options.
• Depending on what the selecteditem is, show/hide/resize content area.

What's the best way to achieve that behavior with the RNV?

I created a simple round button by setting Width and Height properties to the same size and CornerRadius to Width/2. Until now this worked perfect in my application.

After updating to R2.2021 (Telerik.UI.for.Wpf.NetCore, 2021.2.511) I noticed that buttons ignore the CornerRadius property when using the Fluent Theme. This was not the behavior in previous releases. 

Steps to reproduce:

1. Create a WPF Core project (.NET Core 3.1)
2. Add Telerik.UI.for.Wpf.NetCore (2021.2.511) via NuGet package manager
3. Modify App.xaml to include all resource dictionaries necessary for Fluent Theme
4. Create a button:

<telerik:RadButton Content="DOH!"
                   Height="100" Width="100"
                   CornerRadius="50" />

The button is just a square, not round. When changing the theme to e. g. VisualStudio 2019 the button is round again. (see attached pictures)

Regards
Heiko

Hi Team,

We have an application in which we are using gauge control to show some values. This application is currently supporting many themes and themes are applied as per the selected theme. But in few of the themes the RadSemicircleNorthGauge display the white background which is make design look bad. We have tried to remove it but did not find any way to do so. Is there any way through which we can remove it so that it will not be shown in any themes. Attaching here with the images showing the same gauge in 2 different theme. 

Kindly help us resolve this issue.

The attached 2 images are visible in respective themes:

1. Image with background - In Crystal Light/Dark, Fluent light/Dark

2. Image without background - In Office2016, Office2016touch, Expression Dark.

I have a LineSeries where I can add new points by clicking on the chart.

Most of the time everything is fine but sometimes the lines are connected to the wrong point.

It only happens when the time values are close to each other.

If I close the page with the chart and open it again the lines are drawn correctly.

1. Is there a way to get the chart to draw the line correct?

2. If not 1. Then can I somehow force a refresh of the chart?

I have a template for a customized control panel for my grid (see below).
It has been working fine for over a year, until I did the latest update (2021 R2).
Now I get an error that the CotrolPanelItemCollection is not part of the RadGridView.

Getting really frustrated lately with updates causing more problems than solutions :/
Right now both Blazor and WPF are unusable

How do I clear the RadMultiColumnComboBox text when the SelectedItem value it is bound to is NULL?  The ComboBox retains the value of the previous selection.

SelectedItem="{Binding SelectedPricedLineItem.ManufacturingGroup, Mode=TwoWay}"
DisplayMemberPath="DisplayValue"

When  SelectedPricedLineItem.ManufacturingGroup is NULL, the value displayed is is from the previous LineItem

Setting SelectedIndex to -1 is not an option since that would break MVVM.

Good morning, I would like to know if there is a tool to move text or any part of the image, it would be very useful. I hope you can answer my question.

best regards

Javier

Hello.

I want to customize the header for the tab control.

1.(red) I want to change or delete the color of the underlined line for the selected item.

2(blue). I want to change the mouse hover background color of tab items.

3.(orenge). There is a "+" button after the menu with AdditionalContent. I also want to put a "*" in front of the menu.

Some old data used navigationtabcontrol, so I couldn't find a recent example.

I'd appreciate it if you could tell me how to style each of these.

Thanks.

We have a RadPane styled with IsHidden bound to a viewmodel property.

 <Style x:Key="PaneStyle" TargetType="{x:Type telerik:RadPane}">
   <Setter Property="CanUserClose" Value="False" />
   <Setter Property="CanFloat" Value="False" />
   <Setter Property="CanUserPin" Value="False" />
   <Setter Property="ContextMenuTemplate" Value="{x:Null}" />
   <Setter Property="IsPinned" Value="True" />
</Style>

<Style x:Key="PaneXStyle" TargetType="{x:Type telerik:RadPane}" BasedOn="{StaticResource PaneStyle}">
     <Setter Property="IsHidden" Value="{Binding HidePaneX}" />
</Style>

with the styles used like so:

<telerik:RadDocking AllowUnsafeMode="True">
   <telerik:RadDocking.DocumentHost>
     <telerik:RadSplitContainer>
       <telerik:RadPaneGroup>
        <telerik:RadPane Style="{StaticResource PaneStyle}" Header="Some Panes">
          <telerik:RadDocking AllowUnsafeMode="True">
            <telerik:RadDocking.DocumentHost>
              <telerik:RadSplitContainer>
                <telerik:RadPaneGroup>
                  <telerik:RadPane Style="{StaticResource PaneXStyle}" Header="PaneX">
       ......

After updating recently to v. 2021.1.325, we get the following exception.  We'd previously been on a very old version (2015 q1 sp1).

System.InvalidOperationException: Cannot modify the logical children for this node at this time because a tree walk is in progress.
   at System.Windows.FrameworkElement.RemoveLogicalChild(Object child)
   at MS.Internal.Controls.InnerItemCollectionView.ClearModelParent(Object item)
   at MS.Internal.Controls.InnerItemCollectionView._RemoveAt(Int32 index, Int32 indexR, Object item)
   at System.Windows.Controls.ItemCollection.Remove(Object removeItem)
   at Telerik.Windows.Controls.RadPaneGroup.ClosePane(RadPane pane) in c:\DeveloperTooling_Agent13\_work\103\s\Controls\Docking\Docking\Docking\RadPaneGroup.cs:line 671
   at Telerik.Windows.Controls.RadDocking.HidePane(RadPane pane) in c:\DeveloperTooling_Agent13\_work\103\s\Controls\Docking\Docking\Docking\RadDocking.cs:line 463
   at Telerik.Windows.Controls.RadPane.Close() in c:\DeveloperTooling_Agent13\_work\103\s\Controls\Docking\Docking\Docking\RadPane.cs:line 1566
   at Telerik.Windows.Controls.RadPane.OnIsHiddenChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) in c:\DeveloperTooling_Agent13\_work\103\s\Controls\Docking\Docking\Docking\RadPane.cs:line 1319
   at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
   at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
   at System.Windows.DependencyObject.InvalidateProperty(DependencyProperty dp, Boolean preserveCurrentValue)
   at System.Windows.Data.BindingExpressionBase.Invalidate(Boolean isASubPropertyChange)
   at System.Windows.Data.BindingExpression.TransferValue(Object newValue, Boolean isASubPropertyChange)
   at System.Windows.Data.BindingExpression.Activate(Object item)
   at System.Windows.Data.BindingExpression.OnDataContextChanged(DependencyObject contextElement)
   at System.Windows.Data.BindingExpression.HandlePropertyInvalidation(DependencyObject d, DependencyPropertyChangedEventArgs args)
   at System.Windows.Data.BindingExpressionBase.OnPropertyInvalidation(DependencyObject d, DependencyPropertyChangedEventArgs args)
   at System.Windows.Data.BindingExpression.OnPropertyInvalidation(DependencyObject d, DependencyPropertyChangedEventArgs args)
   at System.Windows.DependentList.InvalidateDependents(DependencyObject source, DependencyPropertyChangedEventArgs sourceArgs)
   at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
   at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
   at System.Windows.TreeWalkHelper.InvalidateTreeDependentProperty(TreeChangeInfo info, DependencyObject d, FrameworkObject& fo, DependencyProperty dp, FrameworkPropertyMetadata fMetadata, Style selfStyle, Style selfThemeStyle, ChildRecord& childRecord, Boolean isChildRecordValid, Boolean hasStyleChanged, Boolean isSelfInheritanceParent, Boolean wasSelfInheritanceParent)
   at System.Windows.TreeWalkHelper.InvalidateTreeDependentProperties(TreeChangeInfo info, FrameworkElement fe, FrameworkContentElement fce, Style selfStyle, Style selfThemeStyle, ChildRecord& childRecord, Boolean isChildRecordValid, Boolean hasStyleChanged, Boolean isSelfInheritanceParent, Boolean wasSelfInheritanceParent)
   at System.Windows.FrameworkElement.InvalidateTreeDependentProperties(TreeChangeInfo parentTreeState, Boolean isSelfInheritanceParent, Boolean wasSelfInheritanceParent)
   at System.Windows.FrameworkElement.OnAncestorChangedInternal(TreeChangeInfo parentTreeState)
   at System.Windows.TreeWalkHelper.OnAncestorChanged(DependencyObject d, TreeChangeInfo info, Boolean visitedViaVisualTree)
   at System.Windows.DescendentsWalker`1._VisitNode(DependencyObject d, Boolean visitedViaVisualTree)
   at MS.Internal.PrePostDescendentsWalker`1._VisitNode(DependencyObject d, Boolean visitedViaVisualTree)
   at System.Windows.DescendentsWalker`1.WalkLogicalChildren(FrameworkElement feParent, FrameworkContentElement fceParent, IEnumerator logicalChildren)
   at System.Windows.DescendentsWalker`1.WalkFrameworkElementLogicalThenVisualChildren(FrameworkElement feParent, Boolean hasLogicalChildren)
   at System.Windows.DescendentsWalker`1.IterateChildren(DependencyObject d)
   at System.Windows.DescendentsWalker`1._VisitNode(DependencyObject d, Boolean visitedViaVisualTree)
   at MS.Internal.PrePostDescendentsWalker`1._VisitNode(DependencyObject d, Boolean visitedViaVisualTree)
   at System.Windows.DescendentsWalker`1.WalkLogicalChildren(FrameworkElement feParent, FrameworkContentElement fceParent, IEnumerator logicalChildren)
   at System.Windows.DescendentsWalker`1.WalkFrameworkElementLogicalThenVisualChildren(FrameworkElement feParent, Boolean hasLogicalChildren)
   at System.Windows.DescendentsWalker`1.IterateChildren(DependencyObject d)
   at System.Windows.DescendentsWalker`1.StartWalk(DependencyObject startNode, Boolean skipStartNode)
   at MS.Internal.PrePostDescendentsWalker`1.StartWalk(DependencyObject startNode, Boolean skipStartNode)
   at System.Windows.TreeWalkHelper.InvalidateOnTreeChange(FrameworkElement fe, FrameworkContentElement fce, DependencyObject parent, Boolean isAddOperation)
   at System.Windows.FrameworkElement.ChangeLogicalParent(DependencyObject newParent)
   at System.Windows.FrameworkElement.AddLogicalChild(Object child)
   at Telerik.Windows.Controls.RadDocking.OnLoaded(Object sender, RoutedEventArgs e) in c:\DeveloperTooling_Agent13\_work\103\s\Controls\Docking\Docking\Docking\RadDocking.cs:line 1756
   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   at System.Windows.BroadcastEventHelper.BroadcastEvent(DependencyObject root, RoutedEvent routedEvent)
   at System.Windows.BroadcastEventHelper.BroadcastLoadedEvent(Object root)
   at MS.Internal.LoadedOrUnloadedOperation.DoWork()
   at System.Windows.Media.MediaContext.FireLoadedPendingCallbacks()
   at System.Windows.Media.MediaContext.FireInvokeOnRenderCallbacks()
   at System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget)
   at System.Windows.Media.MediaContext.RenderMessageHandler(Object resizedCompositionTarget)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

For the time being, we instead bind IsEnabled to our VM property, but we'd like to be able to hide these panes again, please.

Additionally, the exception doesn't happen if the pane happens to be visible when the application starts; rather, it only happens if the pane is out of view (one of the other panes in the top-level Docking is foremost) and we browse to it later.  It is still docked during this time.

Is this a bug for which we should file a report?  Is there a different or better way to do this?