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FilteredTree repaint issues with DND enabled [message #1830259]

Wed, 22 July 2020 09:41

Roy Stoliday

Messages: 2
Registered: November 2018

Junior Member

Windows 10 64bit
Eclipse Version: 2020-03 (4.15.0)
Build id: 20200313-1211

To isolate the problem to we are having in our main code base, I've created a new Plugin project using the 'View contribution using 3.x API' wizard.

I run this as an Eclipse Application
I have the Sample View when I run and it works fine.

I've changed the SampleView.java to make a the TreeViewer a FilteredTree instead.
I've then added drag support to it.

I run this as an Eclipse Application
I have Project Explorer open.
I've created a project and put a folder in it.
I expand out all the nodes in the Sample View
index.php/fa/38616/0/

I select one of them ('Leaf 2' under 'Parent 1')

I then select the folder I created in the Project Explorer.
I then CTRL+ left click on the 'Leaf 2' node again.
The other nodes in the tree disappear.
index.php/fa/38617/0/

I can sort of paint them back in again by moving the mouse cursor over where they should be.

Top of createPartControl method now looks like this:

	@Override
	public void createPartControl(Composite parent) {
		
		//viewer = new TreeViewer(parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL);
		FilteredTree filteredTree = new FilteredTree(parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL, new PatternFilter(), true, true);
		viewer = filteredTree.getViewer();

		drillDownAdapter = new DrillDownAdapter(viewer);
		
	    int ops = DND.DROP_COPY | DND.DROP_MOVE;
	    Transfer[] transfers = new Transfer[] { TextTransfer.getInstance()};
	    viewer.addDragSupport(ops, transfers, new DragSourceAdapter());		
				
		viewer.setContentProvider(new ViewContentProvider());
		viewer.setInput(getViewSite());
		viewer.setLabelProvider(new ViewLabelProvider());

Can anyone help with why there's a paint problem?
Images of problem occurring and full SampleView and also whole project attached for reference.

Attachment: FilteredTreeShowingAllNodes.png
(Size: 9.61KB, Downloaded 242 times)
Attachment: FilteredTreeAfterCTRL+click.png
(Size: 25.64KB, Downloaded 258 times)
Attachment: SampleView.java
(Size: 8.18KB, Downloaded 81 times)
Attachment: FilteredTreeIssue.zip
(Size: 20.40KB, Downloaded 83 times)

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Re: FilteredTree repaint issues with DND enabled [message #1830274 is a reply to message #1830259]

Wed, 22 July 2020 13:54

Ed Merks

Messages: 32935
Registered: July 2009

Senior Member

This sounds a bit like this problem:

https://bugs.eclipse.org/bugs/show_bug.cgi?id=526694

No one seems to care to fix it, and then the bug gets closed because no one even responds...

Ed Merks
Professional Support: https://www.macromodeling.com/

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