Home / Community & Support / Developer Productivity Tools Forums / WPF > PanelBar > Selected RadPanelBarItem not expanded after confirmation at PreviewSelectionChanged

• Rainer

  Posted on Sep 19, 2011 (permalink)

  Hello,

  in my simple example i have a RadPanelBar with three RadPanelBarItems.
  The default behavior of the items is to expand on selection. This is fine for me.
  
  Now I want the user to confirm the change of the selection of the RadPanelBarItems.
  Therefore I use a MessageBox in the PreviewSelectionChanged event of the RadPanelBar.

  The confirmation logic works fine but the selected item is not expanded after confirmation.
  This behavior is different to the default.
  
  Regards
  Rainer
  
  The sample code:

  <Window x:Class="RadPanelBarItemSelection.MainWindow"

          xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

          xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

          xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"

          Title="MainWindow" Height="350" Width="525">

      <Grid>

          <telerik:RadPanelBar x:Name="pbItems" 

                               ScrollViewer.HorizontalScrollBarVisibility="Auto"

                               ScrollViewer.VerticalScrollBarVisibility="Auto"

                               SelectionMode="Single"

                               IsExpandOnSingleClickEnabled="True"

                               PreviewSelectionChanged="pnlEditorialSysItems_PreviewSelectionChanged">

                

              <telerik:RadPanelBarItem Header="Item1">

                  <Border Background="Blue" Height="100">

                      <TextBlock Text="Item1"/>

                  </Border>

              </telerik:RadPanelBarItem>

    

              <telerik:RadPanelBarItem Header="Item2">

                  <Border Background="Red" Height="100">

                      <TextBlock Text="Item2"/>

                  </Border>

              </telerik:RadPanelBarItem>

    

              <telerik:RadPanelBarItem Header="Item3">

                  <Border Background="Green" Height="100">

                      <TextBlock Text="Item3"/>

                  </Border>

              </telerik:RadPanelBarItem>

          </telerik:RadPanelBar>

      </Grid>

  </Window>

  using System;

  using System.Collections.Generic;

  using System.Linq;

  using System.Text;

  using System.Windows;

  using System.Windows.Controls;

  using System.Windows.Data;

  using System.Windows.Documents;

  using System.Windows.Input;

  using System.Windows.Media;

  using System.Windows.Media.Imaging;

  using System.Windows.Navigation;

  using System.Windows.Shapes;

  using Telerik.Windows.Controls;

    

  namespace RadPanelBarItemSelection {

      /// <summary>

      /// Interaction logic for MainWindow.xaml

      /// </summary>

      public partial class MainWindow : Window {

          public MainWindow() {

              InitializeComponent();

          }

    

          private void pnlEditorialSysItems_PreviewSelectionChanged(object sender, SelectionChangedEventArgs e) {

              if (MessageBoxResult.Yes == MessageBox.Show("Cancel selection ?", "Cancel", MessageBoxButton.YesNo, MessageBoxImage.Question)) {

                  e.Handled = true;

              }

          }

      }

  }

  
  
  

  Reply

• Petar Mladenov Petar Mladenov

  Posted on Sep 22, 2011 (permalink)

  Hi Rainer,

  This could be a focus-related issue caused by the MessageBox.
  You can expand the item like so:

  private void pnlEditorialSysItems_PreviewSelectionChanged(object sender, SelectionChangedEventArgs e)

        {

            if (MessageBoxResult.Yes == MessageBox.Show("Cancel selection ?", "Cancel", MessageBoxButton.YesNo, MessageBoxImage.Question))

            {

                e.Handled = true;

            }

            else

            {

                if (e.AddedItems.Count > 0)

                {

                    RadTreeViewItem item = e.AddedItems[0] as RadTreeViewItem;

                    item.IsExpanded = true;

                }

            }

        }

   Please let us know if this helps you. Best wishes,
  Petar Mladenov
  the Telerik team

  Explore the entire Telerik portfolio by downloading the Ultimate Collection trial package. Get it now >>

  Attached files

  • PanelBarTest.zip

  Reply

• Rainer

  Posted on Sep 23, 2011 (permalink)

  Hello Petar,
  
  your suggested solution works fine in the test project.
  Unfortunately in the "real world" application IsExpanded gets inverted at HandleClick of TreeViewItem.
  After this the TreeViewItem is collapsed again.
  
  I would be glad if you have any suggestions on this issue.
  
  Regards
  Rainer
  
  -> RadTreeViewItem.Events.cs - Method HandleClick()
  

  ...

  if (mustExpandOnSingleClick && !hasDoubleClickOccured && (!isClickAllowed.HasValue || isClickAllowed.Value))

  {

  this.IsExpanded = !this.IsExpanded;

  }

  ...

  
  -> StackTrace
  
  

  Telerik.Windows.Controls.Navigation.dll!Telerik.Windows.Controls.RadTreeViewItem.HandleClick() Line 1023    C#

  Telerik.Windows.Controls.Navigation.dll!Telerik.Windows.Controls.RadTreeViewItem.OnHeaderMouseLeftButtonUp(object sender = {System.Windows.Controls.Grid}, System.Windows.Input.MouseEventArgs e = {System.Windows.Input.MouseButtonEventArgs}) Line 1606   C#

  PresentationCore.dll!System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(System.Delegate genericHandler, object genericTarget) + 0x31 bytes   

  PresentationCore.dll!System.Windows.RoutedEventArgs.InvokeHandler(System.Delegate handler, object target) + 0x29 bytes 

  PresentationCore.dll!System.Windows.RoutedEventHandlerInfo.InvokeHandler(object target, System.Windows.RoutedEventArgs routedEventArgs) + 0x3e bytes   

  PresentationCore.dll!System.Windows.EventRoute.InvokeHandlersImpl(object source = {System.Windows.Controls.Grid}, System.Windows.RoutedEventArgs args = {System.Windows.Input.MouseButtonEventArgs}, bool reRaised = true) + 0xbe bytes

  PresentationCore.dll!System.Windows.UIElement.ReRaiseEventAs(System.Windows.DependencyObject sender = {System.Windows.Controls.Grid}, System.Windows.RoutedEventArgs args = {System.Windows.Input.MouseButtonEventArgs}, System.Windows.RoutedEvent newEvent) + 0x114 bytes

  PresentationCore.dll!System.Windows.UIElement.OnMouseUpThunk(object sender, System.Windows.Input.MouseButtonEventArgs e) + 0xc5 bytes  

  PresentationCore.dll!System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(System.Delegate genericHandler, object genericTarget) + 0x31 bytes   

  PresentationCore.dll!System.Windows.RoutedEventArgs.InvokeHandler(System.Delegate handler, object target) + 0x29 bytes 

  PresentationCore.dll!System.Windows.RoutedEventHandlerInfo.InvokeHandler(object target, System.Windows.RoutedEventArgs routedEventArgs) + 0x3e bytes   

  PresentationCore.dll!System.Windows.EventRoute.InvokeHandlersImpl(object source = {System.Windows.Controls.TextBlock}, System.Windows.RoutedEventArgs args = {System.Windows.Input.MouseButtonEventArgs}, bool reRaised = false) + 0xbe bytes  

  PresentationCore.dll!System.Windows.UIElement.RaiseEventImpl(System.Windows.DependencyObject sender = {System.Windows.Controls.TextBlock}, System.Windows.RoutedEventArgs args = {System.Windows.Input.MouseButtonEventArgs}) + 0x79 bytes 

  PresentationCore.dll!System.Windows.UIElement.RaiseTrustedEvent(System.Windows.RoutedEventArgs args = {System.Windows.Input.MouseButtonEventArgs}) + 0x41 bytes

  PresentationCore.dll!System.Windows.UIElement.RaiseEvent(System.Windows.RoutedEventArgs args, bool trusted) + 0x2c bytes   

  PresentationCore.dll!System.Windows.Input.InputManager.ProcessStagingArea() + 0x1ff bytes  

  PresentationCore.dll!System.Windows.Input.InputManager.ProcessInput(System.Windows.Input.InputEventArgs input) + 0x45 bytes

  PresentationCore.dll!System.Windows.Input.InputProviderSite.ReportInput(System.Windows.Input.InputReport inputReport) + 0x62 bytes 

  PresentationCore.dll!System.Windows.Interop.HwndMouseInputProvider.ReportInput(System.IntPtr hwnd, System.Windows.Input.InputMode mode, int timestamp, System.Windows.Input.RawMouseActions actions, int x, int y, int wheel) + 0x2c2 bytes

  PresentationCore.dll!System.Windows.Interop.HwndMouseInputProvider.FilterMessage(System.IntPtr hwnd = 657448, MS.Internal.Interop.WindowMessage msg = WM_LBUTTONUP, System.IntPtr wParam = 0, System.IntPtr lParam = 4522048, ref bool handled = false) + 0x67d bytes  

  PresentationCore.dll!System.Windows.Interop.HwndSource.InputFilterMessage(System.IntPtr hwnd = 657448, int msg = 514, System.IntPtr wParam = 0, System.IntPtr lParam = 4522048, ref bool handled = false) + 0x75 bytes 

  WindowsBase.dll!MS.Win32.HwndWrapper.WndProc(System.IntPtr hwnd = 657448, int msg = 514, System.IntPtr wParam = 0, System.IntPtr lParam = 4522048, ref bool handled = false) + 0xbe bytes  

  WindowsBase.dll!MS.Win32.HwndSubclass.DispatcherCallbackOperation(object o) + 0x7d bytes   

  WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate callback, object args, int numArgs) + 0x53 bytes

  WindowsBase.dll!MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(object source = {System.Windows.Threading.Dispatcher}, System.Delegate method, object args, int numArgs, System.Delegate catchHandler = null) + 0x42 bytes

  WindowsBase.dll!System.Windows.Threading.Dispatcher.InvokeImpl(System.Windows.Threading.DispatcherPriority priority, System.TimeSpan timeout, System.Delegate method, object args, int numArgs) + 0xb4 bytes   

  WindowsBase.dll!MS.Win32.HwndSubclass.SubclassWndProc(System.IntPtr hwnd = 657448, int msg = 514, System.IntPtr wParam = 0, System.IntPtr lParam = 4522048) + 0x104 bytes  

  [Native to Managed Transition] 

  [Managed to Native Transition] 

  WindowsBase.dll!System.Windows.Threading.Dispatcher.PushFrameImpl(System.Windows.Threading.DispatcherFrame frame = {System.Windows.Threading.DispatcherFrame}) + 0xc1 bytes

  WindowsBase.dll!System.Windows.Threading.Dispatcher.PushFrame(System.Windows.Threading.DispatcherFrame frame) + 0x49 bytes 

  PresentationFramework.dll!System.Windows.Application.RunDispatcher(object ignore) + 0x5b bytes 

  PresentationFramework.dll!System.Windows.Application.RunInternal(System.Windows.Window window) + 0x74 bytes

  PresentationFramework.dll!System.Windows.Application.Run(System.Windows.Window window) + 0x2b bytes

  PresentationFramework.dll!System.Windows.Application.Run() + 0x1b bytes

  Shell.exe!Shell.App.Main() + 0x5e bytes C#

  [Native to Managed Transition] 

  [Managed to Native Transition] 

  mscorlib.dll!System.AppDomain.nExecuteAssembly(System.Reflection.RuntimeAssembly assembly, string[] args) + 0x9 bytes  

  mscorlib.dll!System.Runtime.Hosting.ManifestRunner.Run(bool checkAptModel) + 0x6e bytes

  mscorlib.dll!System.Runtime.Hosting.ManifestRunner.ExecuteAsAssembly() + 0x90 bytes

  mscorlib.dll!System.Runtime.Hosting.ApplicationActivator.CreateInstance(System.ActivationContext activationContext, string[] activationCustomData) + 0x65 bytes

  mscorlib.dll!System.Runtime.Hosting.ApplicationActivator.CreateInstance(System.ActivationContext activationContext) + 0xd bytes

  mscorlib.dll!System.Activator.CreateInstance(System.ActivationContext activationContext) + 0x44 bytes  

  Microsoft.VisualStudio.HostingProcess.Utilities.dll!Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssemblyDebugInZone() + 0x23 bytes  

  mscorlib.dll!System.Threading.ThreadHelper.ThreadStart_Context(object state) + 0x63 bytes  

  mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool ignoreSyncCtx) + 0xb0 bytes   

  mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state) + 0x2c bytes   

  mscorlib.dll!System.Threading.ThreadHelper.ThreadStart() + 0x44 bytes  

  
  
  
  
  

  Reply

• Petar Mladenov Petar Mladenov

  Posted on Sep 28, 2011 (permalink)

  Hello Rainer,

   Could you please share some more info on the differences in the RadPanelBars from your "real-world"application and the test project used in this thread? This way we could investigate this better. Thank you in advance for your cooperation.

  All the best,
  Petar Mladenov
  the Telerik team

  Explore the entire Telerik portfolio by downloading the Ultimate Collection trial package. Get it now >>

  Reply

• Rainer

  Posted on Sep 29, 2011 (permalink)

  Hello Petar,
  
  I think the point is the we use Prism to register the single RadOutlookBarItems in the RadOutlookBar.
  Actually we changed the workflow to workaround this issue. Unfortunately a further investigation in not planned at the moment.
  
  Regards
  Rainer
  

  Reply

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