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Hot Topic (More than 10 Replies) Custom Node Type (Read 11712 times)
Stoyo
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Re: Custom Node Type
Reply #15 - Sep 13th, 2013 at 8:36am
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What else does your MouseDown handler do? This shows the cursor correctly in my test project every time the pointer enters the image area:

Code
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<Image
	Width="55" Height="55" Source="Resources\Icons\icon.png"
	x:Name="image"
	Cursor="Cross"
	MouseDown="OnImageMouseDown" />

private void OnImageMouseDown(object sender, MouseButtonEventArgs e)
{
	string label = (string)textblock.Content;
	textblock.Content = label + "+";

	var node = Diagram.GetDiagramItem(this) as DiagramNodeAdapter;
	if (node != null)
		node.Parent.CancelDrag();
}


However the diagram control changes the cursor between mouse down and up events. You can override this by setting the OverrideCursor property, or using a custom behavior class.

I hope that helps,
Stoyan
  
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esri_test
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Re: Custom Node Type
Reply #16 - Sep 13th, 2013 at 3:33pm
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This still doesn't work for me.

I got similar thing as yours in a usercontrol. I put this usercontrol in a nodelistview, drag & drop this usercontrol to a diagram, create a node, the first time into image, the cursor is a cross, clicked it, give me what the mousedown handler supposed to do, called Diagram.CancelDrag, no drag link lines appears, but when I move the cursor back to the node, it always shows the hand cursor until I click the node or somewhere else in the diagram.

It looks to me it still waits for another click to finish the link draw between nodes although I called Diagram.CancelDrag.
  
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Stoyo
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Re: Custom Node Type
Reply #17 - Sep 13th, 2013 at 4:25pm
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What Diagram.Behavior value are you using, and are you showing any UI objects such as menus or message boxes from the image.MouseDown handler? You could also try handling the MouseUp event instead of Down.
  
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esri_test
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Re: Custom Node Type
Reply #18 - Sep 13th, 2013 at 4:33pm
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I didn't set Diagram.Behavior value, but you are right, I do show a UI object as a message box from image.MouseDown handler. So you think this messagebox is the trouble maker?
  
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Stoyo
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Re: Custom Node Type
Reply #19 - Sep 13th, 2013 at 4:56pm
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This seems some WPF-wide problem, probably related to management of mouse capture. Even the menus and the window close button don't work unless you click them a second time. Showing the message box from a Preview event seems to work fine though:

Code
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<Image
	Width="55" Height="55" Source="Resources\Icons\icon.png"
	x:Name="image"
	Cursor="Cross"
	PreviewMouseDown="OnImageMouseDown" />

private void OnImageMouseDown(object sender, MouseButtonEventArgs e)
{
	string label = (string)textblock.Content;
	textblock.Content = label + "+";

	var node = Diagram.GetDiagramItem(this) as DiagramNodeAdapter;
	if (node != null)
	{
		node.Parent.CancelDrag();
		MessageBox.Show("trouble maker");
	}
}


I hope that helps,
Stoyan
  
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