Hi,

How can we have all the diagram items selected on  Ctrl+A key press.

Thanks,
Anurodh

I was just going to post on something similar - I get an ArgumentNullException when I do Ctrl-C with at least one node selected on my diagram, even if I am not capturing key events:

[Truncated Stack Trace]
"   at System.Collections.CollectionBase.OnValidate(Object value)\r\n   at System.Collections.CollectionBase.System.Collections.IList.set_Item(Int32 index, Object value)\r\n   at MindFusion.Diagramming.Wpf.DiagramItemCollection.set_Item(Int32 index, DiagramItem value)\r\n   at MindFusion.Diagramming.Wpf.Diagram.CopySelection(Diagram source, Boolean unconnectedLinks, Boolean copyGroups)\r\n   at MindFusion.Diagramming.Wpf.Diagram.CopyToClipboard(Boolean persist, Boolean groups)\r\n   at MindFusion.Diagramming.Wpf.Diagram.xf89f70209334cdd5(Object xe0292b9ed559da7d, ExecutedRoutedEventArgs xce8d8c7e3c2c2426)\r\n   at System.Windows.Input.CommandBinding.OnExecuted(Object sender, ExecutedRoutedEventArgs e)\r\n   at System.Windows.Input.CommandManager.ExecuteCommandBinding(Object sender, ExecutedRoutedEventArgs e, CommandBinding commandBinding)\r\n   at System.Windows.Input.CommandManager.FindCommandBinding(CommandBindingCollection commandBindings, Object sender, RoutedEventArgs e, ICommand command, Boolean execute)\r\n   at System.Windows.Input.CommandManager.FindCommandBinding(Object sender, RoutedEventArgs e, ICommand command, Boolean execute)\r\n   at System.Windows.Input.CommandManager.OnExecuted(Object sender, ExecutedRoutedEventArgs e)\r\n   at System.Windows.UIElement.OnExecutedThunk(Object sender, ExecutedRoutedEventArgs e)\r\n   at System.Windows.Input.ExecutedRoutedEventArgs.InvokeEventHandler(Delegate genericHandler, Object target)\r\n   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)\r\n   at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)\r\n   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)\r\n   at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)\r\n   at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)\r\n   at System.Windows.Input.RoutedCommand.ExecuteImpl(Object parameter, IInputElement target, Boolean userInitiated)\r\n   at System.Windows.Input.RoutedCommand.ExecuteCore(Object parameter, IInputElement target, Boolean userInitiated)\r\n   at System.Windows.Input.CommandManager.TranslateInput(IInputElement targetElement, InputEventArgs inputEventArgs)\r\n   at System.Windows.UIElement.OnKeyDownThunk(Object sender, KeyEventArgs e)\r\n   at System.Windows.Input.KeyEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)\r\n   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)\r\n   at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)\r\n   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)\r\n   at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)\r\n   at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)\r\n   at System.Windows.Input.InputManager.ProcessStagingArea()\r\n   at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)\r\n   at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)\r\n   at System.Windows.Interop.HwndKeyboardInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawKeyboardActions actions, Int32 scanCode, Boolean isExtendedKey, Boolean isSystemKey, Int32 virtualKey)\r\n   at System.Windows.Interop.HwndKeyboardInputProvider.ProcessKeyAction(MSG& msg, Boolean& handled)\r\n   at System.Windows.Interop.HwndSource.CriticalTranslateAccelerator(MSG& msg, ModifierKeys modifiers)\r\n   at System.Windows.Interop.HwndSource.OnPreprocessMessage(Object param)\r\n   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter)\r\n   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)\r\n   at System.Windows.Threading.Dispatcher.WrappedInvoke(Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)\r\n   at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Boolean isSingleParameter)\r\n   at System.Windows.Threading.Dispatcher.Invoke(DispatcherPriority priority, Delegate method, Object arg)\r\n   at System.Windows.Interop.HwndSource.OnPreprocessMessageThunk(MSG& msg, Boolean& handled)\r\n   at System.Windows.Interop.HwndSource.WeakEventPreprocessMessage.OnPreprocessMessage
(MSG& msg, Boolean& handled)\r\n   at System.Windows.Interop.ComponentDispatcherThread.RaiseThreadMessage(MSG& msg)\r\n   at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)\r\n   at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)\r\n

Copy to clipboard won't work if you are using a custom node type that does not override the Clone method nor implements a copy constructor. The control automatically binds the ApplicationCommands.Copy command to the Diagram.CopyToClipboard() method. You could replace it with your own binding if you want to stop Ctrl+C.

I hope that helps,
Stoyan

To select all diagram elements in you suggested to have:
Set DiagramItem.Selected = true for each item in Diagram.Items.

i tried it on keydown event like this:
diagram.AddHandler(Diagram.KeyDownEvent, new KeyEventHandler(diagram_KeyDown),true);

void diagram_KeyDown(object sender, KeyEventArgs e)
	  {
		if (flag && (e.Key == System.Windows.Input.Key.A))
		{
		    flag = false;
		    foreach (DiagramItem item in diagram.Items)
		    {
			  item.Selected = true;
		    }
		}
		if (e.Key == System.Windows.Input.Key.LeftCtrl)
		{
		    flag = true;
		}
	  }
 

but the problem i m facing is that the event is firing only when u press tab to get diagram in focus but when u click on diagram or select a diagram element and then press ctrl + A key the event do not fire.

How to solve this issue?

Thanks,
Anurodh

Thanks for the reply, I tried this but its not working.

Any other suggestion.

Anurodh

Hi,

The event not raised at all. when we just click inside the diagram and press any key, the key down event is not getting raised at all.

but when we are coming to the diagram by tab and pressing any key, the keydown event is being raised.

Thanks for your concern.

No it is a standard WPF application.

Thanks