Hello,

I am using version 2010.3.1314.35.  I have a TreeView that binds to an ObservableCollection<>, and I am allowing dragging and dropping to move items around.  Everything works great and gets updated nicely (I am implementing INotifyPropertyChanged on my objects), except for the following:

When a user selects multiple items in the TreeView and attempts to drop them in between the same selected items.  The result is that the items completely disappear from view.  I have attached a screen capture to show what I am referring to.

I was hoping that there is an easy way to handle this, but maybe I have to add some custom logic to my RadDragAndDropManager.DropQueryEvent (or perhaps my PreviewDragEnded event) to prevent such an occurrence?  I'm trying to avoid having to check if the selected items are surrounding the target destination (which I assume is what is causing the disappearance).

Any help or direction on this would be greatly appreciated!

Cheers,
Mark

Does RichTextBox support track changes feature same as Microsoft Word does?
I need to compare previously entered text with the newly entered data and show user what has been changed since last time.

I was wonder to see that it is available on RadTextEditor on web and not on WPF. I thoght it is more easy to implement it on WPF than on web.

Thanks,
Wajihuddin

Hi,

When .NET 4 WPF going to be release?

Thanks

--Nodir

Hi,
I'm very new on working with Telerik products.  The past few days i'm working with RadDataFilter and custom editors but I stuck with the following problem.

My custom editor is a usercontrol witch has a dependency property called SelectedDateRange of type DateRange. The DateRange is a class with two properties

 

Public Class DateRange

        Implements System.ComponentModel.INotifyPropertyChanged

 

#Region "INotifyPropertyChanged Implementation"

        Public Event PropertyChanged(ByVal sender As Object, ByVal e As System.ComponentModel.PropertyChangedEventArgs) Implements System.ComponentModel.INotifyPropertyChanged.PropertyChanged

        Protected Sub OnPropertyChanged(ByVal propertyname As String)

            RaiseEvent PropertyChanged(Me, New System.ComponentModel.PropertyChangedEventArgs(propertyname))

        End Sub

#End Region

        Private _beginDate As Date?

        <DataMember()>

        Public Property BeginDate() As Date?

            Get

                Return _beginDate

            End Get

            Set(ByVal value As Date?)

                _beginDate = value

                OnPropertyChanged("BeginDate")

            End Set

        End Property

 

 

        Private _endDate As Date?

        <DataMember()>

        Public Property EndDate() As Date?

            Get

                Return _endDate

            End Get

            Set(ByVal value As Date?)

                _endDate = value

                OnPropertyChanged("EndDate")

            End Set

        End Property

 

        Public Function HasRange() As Boolean

            Return BeginDate.HasValue Or EndDate.HasValue

        End Function

 

    End Class

 

Using your example i'm trying to bind the SelectedDateRange with the Value Property of the FilterDescriptor using the following statement

<DataTemplate x:Key="DateRangeBlockEditor">

            <AhsSysUIControls:DateRangeBlock SelectedDateRange="{Binding Value,Mode=TwoWay}" />

        </DataTemplate>

It seems that this doesn't work as i get always an unsetValue. The bottom line is that i want the FilterDescriptor to carry the DateRange because later i iterate all the FilterDescriptors to create an SQL where statement. Any ideas?

Thanks Sotiris

I seem to be getting an error when trying to filter on a Number column and first typing the period characater for a decimal point. I can recreate it in your Demo program by going to the GridView > Click Events Demo and typing a period(.) in the UnitPrice filter.

Any work arounds to fix this?

The call stack I got was:
at Telerik.Windows.Controls.MaskedTextBox.NumericMaskHandler.GetPointPosition()
   at Telerik.Windows.Controls.MaskedTextBox.NumericMaskHandler.Insert(Char insertion)
   at Telerik.Windows.Controls.MaskedTextBox.NumericMaskHandler.Insert(String insertion)
   at Telerik.Windows.Controls.RadMaskedTextBox.TextBox_TextChanged()
   at Telerik.Windows.Controls.MaskedTextBox.ExtendedTextBox.ExtendedTextBox_TextChanged(Object sender, TextChangedEventArgs e)
   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   at System.Windows.Controls.Primitives.TextBoxBase.OnTextContainerChanged(Object sender, TextContainerChangedEventArgs e)
   at System.Windows.Controls.TextBox.OnTextContainerChanged(Object sender, TextContainerChangedEventArgs e)
   at System.Windows.Documents.TextContainerChangedEventHandler.Invoke(Object sender, TextContainerChangedEventArgs e)
   at System.Windows.Documents.TextContainer.EndChange(Boolean skipEvents)
   at System.Windows.Documents.TextRangeBase.EndChange(ITextRange thisRange, Boolean disableScroll, Boolean skipEvents)
   at System.Windows.Documents.TextRange.ChangeBlock.System.IDisposable.Dispose()
   at System.Windows.Documents.TextEditorTyping.DoTextInput(TextEditor This, String textData, Boolean isInsertKeyToggled, Boolean acceptControlCharacters)
   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
   at System.Windows.Input.InputManager.ProcessStagingArea()
   at System.Windows.Input.TextCompositionManager.UnsafeCompleteComposition(TextComposition composition)
   at System.Windows.Input.TextCompositionManager.PostProcessInput(Object sender, ProcessInputEventArgs e)
   at System.Windows.Input.InputManager.RaiseProcessInputEventHandlers(ProcessInputEventHandler postProcessInput, ProcessInputEventArgs processInputEventArgs)
   at System.Windows.Input.InputManager.ProcessStagingArea()
   at System.Windows.Input.TextCompositionManager.UnsafeStartComposition(TextComposition composition)
   at System.Windows.Input.TextCompositionManager.PostProcessInput(Object sender, ProcessInputEventArgs e)
   at System.Windows.Input.InputManager.RaiseProcessInputEventHandlers(ProcessInputEventHandler postProcessInput, ProcessInputEventArgs processInputEventArgs)
   at System.Windows.Input.InputManager.ProcessStagingArea()
   at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
   at System.Windows.Interop.HwndKeyboardInputProvider.ProcessTextInputAction(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at System.Windows.Interop.HwndSource.OnPreprocessMessage(Object param)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)

I want to create an application that contains one or more sidebars that are "pinnable". I don't need any groups or sections, just a container that can be docked on any edge and and pinned open or float.

Is there a Telerik control that does this?

Hi

If I undock a RadPaneGroup, the Pane always jumps to the rightmost Pane in the group. Can I stop this behaviour?

Thanks
Tom Davies

Hi Support,

We have a requirement like select multiple items from combobox and bind it to collection.what ever items selected from combobox should be displayed in chart.Please provide some solution for this.Thanks in Advance.

BHASKAR

How do i use the SelectionChanged in RadTabControl when using MVVM?
When I select a TabItem in a RadTabControl, I want to select a specific RadRibbonTab in my RadRibbonBar.

Hi!

I am using RadTransitionControl to perform transitions between heterogeneous views that generally contain pure WPF controls, but that sometimes also use interop-based controls.

I detected recently an unmanaged memory leak in my application when using RadTransition with a WPFChromium-based control (http://wpfchromium.codeplex.com). The application is stable when performing transitions between pure WPF controls. It is still stable when performing transitions between views that contain DirectShow-based controls. However, whenever I use WPFChromium in my transitions, there is a significant, constant unmanaged memory leak (about 20MB/hour with transitions occuring every 30 seconds).

If I take RadTransitionControl off my application, it becomes stable, even when using WPFChromium.

The interesting part is that it does not seem a transition-related problem, because if I keep setting the Content property always to the same view (i.e., the transition does not occur), the unmanaged leak persists. It seems that just using the RadTransitionControl as a container of WPFChromium triggers the leak.


I collected heap data with WinDgb, and there are two kinds of memory blocks leaking:

a) 48 bytes long blocks leaking about 100.000 units every hour. This is the code stack leaking those blocks:
        7744dd6c ntdll!RtlAllocateHeap+0x00000274
        6ebe13ff wpfgfx_v0300+0x000013ff
        6ebe7e69 wpfgfx_v0300!MilChannel_CommitChannel+0x0000008b
        6ebe8940 wpfgfx_v0300!MilChannel_CommitChannel+0x00000b62
        6ebe89bf wpfgfx_v0300!MilChannel_CommitChannel+0x00000be1
        6ebe891b wpfgfx_v0300!MilChannel_CommitChannel+0x00000b3d
        6ebe88ec wpfgfx_v0300!MilChannel_CommitChannel+0x00000b0e
        6ebedede wpfgfx_v0300!MilChannel_AppendCommandData+0x00000961
        6ebec992 wpfgfx_v0300!MilComposition_PeekNextMessage+0x00000078
        6ebec9b3 wpfgfx_v0300!MilComposition_PeekNextMessage+0x00000099
        6ebe73c8 wpfgfx_v0300!MilResource_SendCommand+0x000024d4
        6ebe7437 wpfgfx_v0300!MilResource_SendCommand+0x00002543
        6ebe74b6 wpfgfx_v0300!MilResource_SendCommand+0x000025c2
b) 3686384 bytes long blocks leaking about 2/3 units every hour. This is the code stack leaking those blocks:

        7744dd6c ntdll!RtlAllocateHeap+0x00000274
        73c62423 WindowsCodecs!WPF::ProcessHeapImpl::Alloc+0x00000016
        73c63491 WindowsCodecs!WPF::HrMalloc+0x0000004b
        73c663ba WindowsCodecs!CSystemMemoryBitmap::HrInit+0x0000006c
        73d0d5b9 WindowsCodecs!CLateBitmap::FinalizeBitmap+0x0000002e
        73d0d6b9 WindowsCodecs!CLateBitmap::CopyPixels+0x0000004a
        73d00f7b WindowsCodecs!IWICBitmapSource_CopyPixels_Proxy+0x00000023


Are you aware situations leading to unmanaged memory leaks with WPFChromium or any other C++ wrapper-based control? Do you suggest any work-around or further debugging?


Thanks!

Helder Pinto