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madhan1
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Moving nodes using Keys
Aug 17th, 2012 at 12:25pm
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dear stoyo,

        i want to move the nodes up,down,left and right using keys. but i am not able to catch the keys "diagramView_KeyDown" kindly help
  
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Stoyo
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Re: Moving nodes using Keys
Reply #1 - Aug 17th, 2012 at 1:24pm
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The Windows Forms framework does not raise KeyDown for arrow keys. You can detect them using PreviewKeyDown instead:
http://mindfusion.eu/Forum/YaBB.pl?num=1323665629/1#1

I hope that helps,
Stoyan
  
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madhan1
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Re: Moving nodes using Keys
Reply #2 - Aug 18th, 2012 at 4:30am
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Thanks stoyo,

             it works only first time. when i am press the left key continuously the event is not fired. kindly help
  
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Re: Moving nodes using Keys
Reply #3 - Aug 20th, 2012 at 8:04am
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It is raised continuously in my test project. If it is raised only once in your application, perhaps the DiagramView loses the keyboard focus after the first key-press. You can verify that by adding a breakpoint to the DiagramView.Leave event handler; then you should be able to see in the call-stack window what exactly changes the focus.

I hope that helps,
Stoyan
  
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Re: Moving nodes using Keys
Reply #4 - Aug 20th, 2012 at 11:25am
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Dear stoyan,

My call stack,kindly check and help

Telephony.exe!Telephony.Form1.diagramView_Leave(object sender = {MindFusion.Diagramming.WinForms.DiagramView}, System.EventArgs e = {System.EventArgs}) Line 16754      C#
     System.Windows.Forms.dll!System.Windows.Forms.Control.OnLeave(System.EventArgs e) + 0x70 bytes      
     System.Windows.Forms.dll!System.Windows.Forms.Control.NotifyLeave() + 0x20 bytes      
     System.Windows.Forms.dll!System.Windows.Forms.ContainerControl.UpdateFocusedCont
rol() + 0x2e2 bytes      
     System.Windows.Forms.dll!System.Windows.Forms.ContainerControl.AssignActiveContr
olInternal(System.Windows.Forms.Control value = {System.Windows.Forms.PropertyGrid}) + 0x54 bytes      
     System.Windows.Forms.dll!System.Windows.Forms.ContainerControl.ActivateControlIn
ternal(System.Windows.Forms.Control control, bool originator = false) + 0x76 bytes      
     System.Windows.Forms.dll!System.Windows.Forms.ContainerControl.SetActiveControlI
nternal(System.Windows.Forms.Control value = {System.Windows.Forms.PropertyGrid}) + 0x73 bytes      
     System.Windows.Forms.dll!System.Windows.Forms.ContainerControl.SetActiveControl(
System.Windows.Forms.Control ctl) + 0x33 bytes      
     System.Windows.Forms.dll!System.Windows.Forms.ContainerControl.ActiveControl.set
(System.Windows.Forms.Control value) + 0x5 bytes      
     System.Windows.Forms.dll!System.Windows.Forms.ContainerControl.Select(bool directed = true, bool forward = true) + 0x42 bytes      
     System.Windows.Forms.dll!System.Windows.Forms.Control.SelectNextControl(System.W
indows.Forms.Control ctl, bool forward, bool tabStopOnly, bool nested, bool wrap) + 0x7b bytes      
     System.Windows.Forms.dll!System.Windows.Forms.ContainerControl.ProcessArrowKey(b
ool forward) + 0x3f bytes      
     System.Windows.Forms.dll!System.Windows.Forms.ContainerControl.ProcessDialogKey(
System.Windows.Forms.Keys keyData = LButton | RButton | MButton | Space) + 0x6c bytes      
     System.Windows.Forms.dll!System.Windows.Forms.Form.ProcessDialogKey(System.Windo
ws.Forms.Keys keyData) + 0xf8 bytes      
     System.Windows.Forms.dll!System.Windows.Forms.Control.ProcessDialogKey(System.Wi
ndows.Forms.Keys keyData) + 0x16 bytes      
     System.Windows.Forms.dll!System.Windows.Forms.Control.PreProcessMessage(ref System.Windows.Forms.Message msg) + 0xe2 bytes      
     System.Windows.Forms.dll!System.Windows.Forms.Control.PreProcessControlMessageIn
ternal(System.Windows.Forms.Control target = {MindFusion.Diagramming.WinForms.DiagramView}, ref System.Windows.Forms.Message msg = {System.Windows.Forms.Message}) + 0x101 bytes      
     System.Windows.Forms.dll!System.Windows.Forms.Application.ThreadContext.PreTrans
lateMessage(ref System.Windows.Forms.NativeMethods.MSG msg = {System.Windows.Forms.NativeMethods.MSG}) + 0xf6 bytes      
     System.Windows.Forms.dll!System.Windows.Forms.Application.ThreadContext.System.W
indows.Forms.UnsafeNativeMethods.IMsoComponent.FPreTranslateMessage(ref System.Windows.Forms.NativeMethods.MSG msg) + 0x5 bytes      
     System.Windows.Forms.dll!System.Windows.Forms.Application.ComponentManager.Syste
m.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(int dwComponentID, int reason = -1, int pvLoopData = 0) + 0x22e bytes      
     System.Windows.Forms.dll!System.Windows.Forms.Application.ThreadContext.RunMessa
geLoopInner(int reason = -1, System.Windows.Forms.ApplicationContext context = {System.Windows.Forms.ApplicationContext}) + 0x177 bytes      
     System.Windows.Forms.dll!System.Windows.Forms.Application.ThreadContext.RunMessa
geLoop(int reason, System.Windows.Forms.ApplicationContext context) + 0x61 bytes      
     System.Windows.Forms.dll!System.Windows.Forms.Application.Run(System.Windows.For
ms.Form mainForm) + 0x31 bytes      
     Telephony.exe!Telephony.Form1.Main(string[] args = {string[0]}) Line 1919 + 0x2d bytes      C#
     [Native to Managed Transition]      
     [Managed to Native Transition]      
     mscorlib.dll!System.AppDomain.ExecuteAssembly(string assemblyFile, System.Security.Policy.Evidence assemblySecurity, string[] args) + 0x3a bytes      
     Microsoft.VisualStudio.HostingProcess.Utilities.dll!Microsoft.VisualStudio.Hosti
ngProcess.HostProc.RunUsersAssembly() + 0x2b bytes      
     mscorlib.dll!System.Threading.ThreadHelper.ThreadStart_Context(object state) + 0x66 bytes      
     mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionCon
text executionContext, System.Threading.ContextCallback callback, object state) + 0x6f bytes      
  
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Stoyo
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Re: Moving nodes using Keys
Reply #5 - Aug 21st, 2012 at 7:01am
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There's a ContainerControl.ProcessArrowKey method that handles the arrow keys and calls UpdateFocusedControl, which I suppose is what moves the focus away from the view. ContainerControl is a base for UserControl; if you have placed the DiagramView inside a user control, check this SO post:
http://stackoverflow.com/questions/6177201/how-to-prevent-usercontrol-form-handl...
  
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madhan1
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Re: Moving nodes using Keys
Reply #6 - Aug 21st, 2012 at 8:34am
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Dear stoyan,

              Thanks a lot,it works fine.

But i am not able to move the input node (shape node and Table combined ) and not able to move multiple nodes at a same time
  
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madhan1
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Re: Moving nodes using Keys
Reply #7 - Aug 23rd, 2012 at 4:33am
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Hi stoyan,

        is it possible to do.give some ideas so that i will try.
  
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Re: Moving nodes using Keys
Reply #8 - Aug 23rd, 2012 at 6:42am
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Ideas about what?
  
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madhan1
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Re: Moving nodes using Keys
Reply #9 - Aug 23rd, 2012 at 7:18am
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moving multiple selected nodes
  
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Stoyo
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Re: Moving nodes using Keys
Reply #10 - Aug 23rd, 2012 at 8:07am
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You can get a list of selected nodes through diagram.Selection.Nodes.
  
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madhan1
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Re: Moving nodes using Keys
Reply #11 - Aug 23rd, 2012 at 10:18am
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Thanks stoyan,

           it worked Smiley
  
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