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Normal Topic problem while selecting node (Read 5428 times)
ayushneema
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problem while selecting node
Sep 30th, 2009 at 10:04am
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Hi
I am using following code to add a node in my diagram:
Code
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private void AddStickyNode(StickyNoteInfo note)
	  {
		ShapeNode mainNode = new ShapeNode(diagram);
		int height = 30;
		int width = 30;


		    var format = new StringFormat();
		    format.Alignment = StringAlignment.Center;
		    format.LineAlignment = StringAlignment.Far;
		    format.FormatFlags = StringFormatFlags.NoWrap;
		    format.Trimming =		     StringTrimming.EllipsisCharacter;

		    mainNode.EnableStyledText = true;
		    mainNode.PolygonalTextLayout = false;
		    mainNode.TextFormat = format;
		    mainNode.ClipToBounds = true;
		    mainNode.DragEnter += new		     DragEventHandler(mainNode_DragEnter);

mainNode.AnchorPattern = null;
		    mainNode.HandlesStyle = HandlesStyle.EasyMove;
		    mainNode.EnabledHandles =		   AdjustmentHandles.Move|AdjustmentHandles.ResizeHandles;

diagram.Nodes.Add(mainNode);
		    NodeInfo nodeInfo = new NodeInfo();
		    mainNode.Shape = stickyNoteShape;
		    height = note.ObjectHeight;
		    width = note.ObjectWidth;

		    if (width == 30)
		    {
			  width += note.XPos;
			  height += note.YPos;
		    }

		    mainNode.Bounds = new Rect(new Point(note.XPos + xOffset, note.YPos + yOffset)
				, new Size(width - note.XPos, height - note.YPos));

	  mainNode.ZIndex = 0;

		    //Fill the NodeInfo object with device related information
		    nodeInfo.AbstractionType = AbstractionType.absStickyNote;
		    nodeInfo.ParentObjectID = note.ParentID;
		    nodeInfo.ObjectID = note.NoteID;
		    nodeInfo.ImageUri = uri;
		    nodeInfo.Shape = mainNode.Shape;
		    nodeInfo.NodeType = NodeType.LooseNode;
		    nodeInfo.IsDirty = false;
		    nodeInfo.Bounds = mainNode.Bounds;
		    nodeInfo.NoteDescription = note.NoteDesc;
		    nodeInfo.LastModified = note.LastModified;
		    nodeInfo.NoteName = note.NoteName;
		    //Attach NodeInfo object to the diagram mode tag
		    mainNode.Tag = nodeInfo;
		    mainNode.ZLevelDown();

		    nodeList.Add(note.NoteID, mainNode);



	  }


I can resize this node. so i expend this node in such a way that it overlap other nodes of the diagram. I named this node a "sticky note". This sticky note create problem when it contain some other node(by expanding it). I select "stick note" after that when i select another node of the diagram which is inside this "sticky note" then  sticky node should be unselected. but "sticky note" still selected so there are two node selected at the same time.
  
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Stoyo
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Re: problem while selecting node
Reply #1 - Sep 30th, 2009 at 11:01am
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I could not reproduce this. Perhaps you are selecting another node programmatically  in response to some mouse-related event?
  
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ayushneema
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Re: problem while selecting node
Reply #2 - Sep 30th, 2009 at 12:00pm
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I handle the diagram_NodeClicked event
  
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ayushneema
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Re: problem while selecting node
Reply #3 - Sep 30th, 2009 at 12:03pm
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i think followomg code might reproduce issue.
i have add initnode() method in that.
Code
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 private void AddStickyNode(StickyNoteInfo note)
	  {
		ShapeNode mainNode = new ShapeNode(diagram);
		int height = 30;
		int width = 30;

		try
		{
		    InitNodes(mainNode);

		    var format = new StringFormat();
		    format.Alignment = StringAlignment.Center;
		    format.LineAlignment = StringAlignment.Far;
		    format.FormatFlags = StringFormatFlags.NoWrap;
		    format.Trimming = StringTrimming.EllipsisCharacter;

		    mainNode.EnableStyledText = true;
		    mainNode.PolygonalTextLayout = false;
		    mainNode.TextFormat = format;
		    mainNode.ClipToBounds = true;
		    mainNode.DragEnter += new DragEventHandler(mainNode_DragEnter);
		    mainNode.AnchorPattern = null;
		    mainNode.HandlesStyle = HandlesStyle.EasyMove;
		    mainNode.EnabledHandles = AdjustmentHandles.Move|AdjustmentHandles.ResizeHandles;
		    diagram.Nodes.Add(mainNode);
		    NodeInfo nodeInfo = new NodeInfo();
		    mainNode.Shape = stickyNoteShape;
		    height = note.ObjectHeight;
		    width = note.ObjectWidth;

		    if (width == 30)
		    {
			  width += note.XPos;
			  height += note.YPos;
		    }

		    mainNode.Bounds = new Rect(new Point(note.XPos + xOffset, note.YPos + yOffset)
				, new Size(width - note.XPos, height - note.YPos));
		    mainNode.Brush = new SolidColorBrush(Color.FromArgb(95, 211, 211, 211));
		    mainNode.Pen = new Pen(new SolidColorBrush(Color.FromRgb(189, 186, 105)), 1);
		    Uri uri = new Uri(MainWin.GetImagesPath() + cStickyNote);
		    mainNode.Image = new BitmapImage(uri);
		    mainNode.ImageAlign = ImageAlign.TopLeft;
		    mainNode.Text = note.NoteName;
		    mainNode.TextBrush = Brushes.Black;
		    mainNode.ZIndex = 0;

		    //Fill the NodeInfo object with device related information
		    nodeInfo.AbstractionType = AbstractionType.absStickyNote;
		    nodeInfo.ParentObjectID = note.ParentID;
		    nodeInfo.ObjectID = note.NoteID;
		    nodeInfo.ImageUri = uri;
		    nodeInfo.Shape = mainNode.Shape;
		    nodeInfo.NodeType = NodeType.LooseNode;
		    nodeInfo.IsDirty = false;
		    nodeInfo.Bounds = mainNode.Bounds;
		    nodeInfo.NoteDescription = note.NoteDesc;
		    nodeInfo.LastModified = note.LastModified;
		    nodeInfo.NoteName = note.NoteName;
		    //Attach NodeInfo object to the diagram mode tag
		    mainNode.Tag = nodeInfo;
		    mainNode.ZLevelDown();
		    nodeList.Add(note.NoteID, mainNode);
		}

		catch (Exception ex)
		{

		}

	  }


private void InitNodes(ShapeNode node)
	  {

		try
		{
		    node.EnabledHandles = AdjustmentHandles.Move;
		    node.HandlesStyle = HandlesStyle.Custom;
		    node.EnableStyledText = false;
		    Font nodeFont = new Font("Calibri", 12);
		    node.Font = nodeFont;
		    node.TextFormat.Alignment = StringAlignment.Center;
		    node.TextFormat.LineAlignment = StringAlignment.Center;
		    node.TextFormat.Trimming = StringTrimming.EllipsisCharacter;
		    AnchorPattern aPattern = new AnchorPattern(new AnchorPoint[]
	  {
	  new AnchorPoint(93,30,false,false,MarkStyle.Circle,new SolidColorBrush(Colors.Brown))
	  });
		    node.AnchorPattern = aPattern;
		    ToolTipService.SetIsEnabled(node, true);
		    node.ToolTip = "";
		    node.MouseMove += new MouseEventHandler(node_MouseMove);
		    EventManager.RegisterClassHandler(typeof(ShapeNode),
		    ToolTipService.ToolTipOpeningEvent, new RoutedEventHandler(ShapeNode_ToolTipOpening));
		}
		catch (Exception ex)
		{

		}
	  }

  
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Stoyo
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Re: problem while selecting node
Reply #4 - Sep 30th, 2009 at 4:02pm
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It doesn't. What code do you have in the node_MouseMove and mainNode_DragEnter handlers? You could add a SelectionChanged event handler, set a breakpoint there, and run through the debugger to see what exactly adds the second node to the selection.

Stoyan
  
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ayushneema
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Re: problem while selecting node
Reply #5 - Oct 1st, 2009 at 4:57am
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i am doing nothing in mainNode_DragEnter(block is empty) and in node_MouseMove i have following code:
Code
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private void node_MouseMove(object sender, MouseEventArgs e)

  {


ShapeNode source = sender as ShapeNode;


if (source != null)


{



diagram.ShowAnchors = ShowAnchors.Auto;



Rect rect = new Rect(source.Bounds.X + source.Bounds.Width * .90, source.Bounds.Y + source.Bounds.Height * .15, 8, 8);



  Point point = System.Windows.Input.Mouse.GetPosition(diagram.DocumentPlane);



  if (rect.Contains(point))



  {




diagram.OverrideCursor = Cursors.Pen;



  }



  else



  {




diagram.OverrideCursor = null;



  }


    }

   }

  
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ayushneema
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Re: problem while selecting node
Reply #6 - Oct 5th, 2009 at 5:01am
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hi stoyo,
could please suggest me, how to solve the problem.
  
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Stoyo
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Re: problem while selecting node
Reply #7 - Oct 6th, 2009 at 5:25am
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I think I've already done that. Add a SelectionChanged event handler, place a debugger breakpoint there, and check the callstack when you see there are two nodes in the selection. You might add a condition to the breakpoint so that it breaks only when diagram.Selection.Nodes.Count == 2. Then in the call-stack window you should be able to see what exactly adds the second node.
  
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