Bug 161805 [Viewers] JFace TreeViewer collapses node when sibbling removed
3.2 1. Use the Eclipse Wizard to produce a plugin with a tree viewer view. 2. Paste the modified SampleView.java - this looks like the left part of the attached screenshot 3. Click on the top node Parent1 and type - 4. TreeViewer.remove is called to remove Parent 1. TreeViewer.refresh is called - this looks like the right part of the attached screenshot Wrong: node Parent 4 is now collapsed. Expectation Parent 4 is still expanded. Is there any workaround? Am I misusing your API? Note. The snippet is almost identical to the code generated by PDE for plugin / view / Tree Viewer. Here is the extra code in createPartControl: viewer.getTree().addKeyListener(new KeyListener() { public void keyReleased(KeyEvent e) { // TODO Auto-generated method stub } public void keyPressed(KeyEvent e) { if (e.character == '-') { TreeParent parent = (TreeParent) ((IStructuredSelection)viewer.getSelection()).toArray()[0]; parent.getParent().removeChild(parent); viewer.refresh(); } if (e.character == '+') { TreeParent parent = (TreeParent) ((IStructuredSelection)viewer.getSelection()).toArray()[0]; parent.addChild(new TreeParent(new Date().toString())); } } });
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/AbstractTreeViewer.java
setExpanded(item, expanded.containsKey(newElement));
		}
		
		if (min < elementChildren.length) {
			for (int i = min; i < elementChildren.length; ++i) {
				createTreeItem(widget, elementChildren[i], i);
			}
			
			
			
			if (expanded.size() > 0) {
				
				items = getChildren(widget);
				for (int i = min; i < elementChildren.length; ++i) {
					
					
					
					
					
					
					if (expanded.containsKey(elementChildren[i])) {
						setExpanded(items[i], true);
					}
				}
			}
		}
		
		if (widget == tree && oldCnt == 0 && getItemCount(tree) != 0) {
			
			tree.setRedraw(false);