Clicking on Column Headers And Dependence Arrows

[Eric]

Hello,

I don't suppose there is a way to handle a click on the header of a column, or even better a way to just sort the columns when you click on a column header?

Also, is there a way to register a click on the depence arrows so I can show more detailed info. when they are clicked?
Thanks,
Eric

[Miroslav Nedyalkov]

Hi Eric,

There are no built-in features for both behaviors, but you could create implicit styles for these headers and dependency arrows and create an attached behavior which adds this functionality to them. For more information about attached behaviors you might refer to this article.

Please refer to the attached project that demonstrates the idea.

Kind regards,
Miroslav Nedyalkov
the Telerik team

[Nelson]

This project doesn't seem to run, at least with the Q2 2012 release?  Fails in debug with:

System.NullReferenceException was unhandled
  Message=Object reference not set to an instance of an object.
  Source=Telerik.Windows.Controls.GanttView
  StackTrace:
       at Telerik.Windows.Controls.GanttView.ColumnDefinition.CreateGetValueFuncForType(Type type) in c:\TB\117\WPF_Scrum\Release_WPF\Sources\Development\Controls\GanttView\GanttView\Gantt\ColumnDefinitions\ColumnDefinition.cs:line 51
       at Telerik.Windows.Controls.GanttView.ColumnDefinition.GetItemValue(Object dataItem) in c:\TB\117\WPF_Scrum\Release_WPF\Sources\Development\Controls\GanttView\GanttView\Gantt\ColumnDefinitions\ColumnDefinition.cs:line 41
       at Telerik.Windows.Controls.GanttView.CellInfo.GetValue() in c:\TB\117\WPF_Scrum\Release_WPF\Sources\Development\Controls\GanttView\GanttView\Gantt\RenderingViewModels\CellInfo.cs:line 46
       at Telerik.Windows.Controls.GanttView.CellInfo.GetFormattedValue() in c:\TB\117\WPF_Scrum\Release_WPF\Sources\Development\Controls\GanttView\GanttView\Gantt\RenderingViewModels\CellInfo.cs:line 52
       at Telerik.Windows.Controls.GanttView.SimpleCellContainer.UpdateTextBlock() in c:\TB\117\WPF_Scrum\Release_WPF\Sources\Development\Controls\GanttView\GanttView\Gantt\Containers\SimpleCellContainer.cs:line 53
       at Telerik.Windows.Controls.GanttView.SimpleCellContainer.OnApplyTemplate() in c:\TB\117\WPF_Scrum\Release_WPF\Sources\Development\Controls\GanttView\GanttView\Gantt\Containers\SimpleCellContainer.cs:line 44
       at System.Windows.FrameworkElement.ApplyTemplate()
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       at Telerik.Windows.Rendering.LogicalCanvasPanel.MeasureContainers(IContainerRecycler recycler, Size availableSize) in c:\TB\117\WPF_Scrum\Release_WPF\Sources\Development\Controls\Scheduling.Core\Scheduling\Rendering\LogicalCanvas\LogicalCanvasPanel.cs:line 142
       at Telerik.Windows.Rendering.Virtualization.VirtualizedPanel.MeasureOverride(Size availableSize) in c:\TB\117\WPF_Scrum\Release_WPF\Sources\Development\Controls\Scheduling.Core\Scheduling\Rendering\Virtualization\VirtualizedPanel.cs:line 73
       at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
       at System.Windows.UIElement.Measure(Size availableSize)
       at System.Windows.ContextLayoutManager.UpdateLayout()
       at System.Windows.Interop.HwndSource.SetLayoutSize()
       at System.Windows.Interop.HwndSource.set_RootVisualInternal(Visual value)
       at System.Windows.Window.SetRootVisualAndUpdateSTC()
       at System.Windows.Window.SetupInitialState(Double requestedTop, Double requestedLeft, Double requestedWidth, Double requestedHeight)
       at System.Windows.Window.CreateSourceWindow(Boolean duringShow)
       at System.Windows.Window.ShowHelper(Object booleanBox)
       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)
       at System.Windows.Threading.Dispatcher.WrappedInvoke(Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
       at System.Windows.Threading.DispatcherOperation.InvokeImpl()
       at System.Threading.ExecutionContext.runTryCode(Object userData)
       at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Windows.Threading.DispatcherOperation.Invoke()
       at System.Windows.Threading.Dispatcher.ProcessQueue()
       at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
       at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
       at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
       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)
       at System.Windows.Threading.Dispatcher.WrappedInvoke(Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
       at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
       at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
       at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
       at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
       at System.Windows.Application.RunInternal(Window window)
       at System.Windows.Application.Run()
       at GanttElementsInteraction.App.Main() in D:\WPF_Apps\telerik\GanttElementsInteraction\obj\Debug\App.g.cs:line 0
       at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
  InnerException: 

could you post an example that runs with the current release?

[Miroslav Nedyalkov]

Hi Nelson,

This is because there is not MemberBinding set - this works correctly with the latest internal build version, but throws an exception with the official version. To see the demo just set a MemberBinding to the ColumnDefintions.

<telerik:RadGanttView.Columns>
    <telerik:ColumnDefinition ColumnWidth="200"  Header="Column 1" MemberBinding="{Binding Start}" />
    <telerik:ColumnDefinition ColumnWidth="200"  Header="Column 2" MemberBinding="{Binding End}" />
</telerik:RadGanttView.Columns>

Hope this helps.

Greetings,
Miroslav Nedyalkov
the Telerik team