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Bug 80761

Summary: [Viewers] Nodes not expanding during drag'n'drop when DeferredTreeContentManager is used
Product: [Eclipse Project] Platform Reporter: Michal Tkacz <Michal.Tkacz>
Component: UIAssignee: Platform UI Triaged <platform-ui-triaged>
Status: CLOSED WONTFIX QA Contact:
Severity: normal    
Priority: P4 Keywords: helpwanted
Version: 3.1   
Target Milestone: ---   
Hardware: PC   
OS: Windows XP   
Whiteboard: stalebug

Description Michal Tkacz CLA 2004-12-11 12:22:51 EST
When a drag'n'drop operation is in progress and the cursor stops over a tree
node, it is supposed to expand to allow the user to select a drop target from a
subnode. This however doesn't work as expected when a DeferredTreeContentManager
is used in the tree viewer's content provider.

Steps to reproduce:
- check out org.eclipse.ui.examples.job project from the Eclipse CVS
- open org.eclipse.ui.examples.jobs.views.LazyTreeView class and put these lines
  at the end of createPartControl() method:

  Transfer[] transfers = new Transfer[] {TextTransfer.getInstance()};
  viewer.addDragSupport(DND.DROP_MOVE, transfers, new DragSourceAdapter());
  viewer.addDropSupport(DND.DROP_MOVE, transfers, new DropTargetAdapter() {
    public void dragOver(DropTargetEvent event) {
      event.feedback = DND.FEEDBACK_SELECT | DND.FEEDBACK_EXPAND;
    }
  });

- start runtime workbench
- open Lazy Trees view
- drag any item then stop the cursor over any item that hasn't been
  expanded yet

Notice that the "Pending..." node appears under the selected node but nothing
else happens until the drag'n'drop operation is over. This prevents the user
from selecting a subnode. The subnodes appear as soon as the mouse button is
released or the operation is cancelled.
Comment 1 Boris Bokowski CLA 2009-11-26 09:55:46 EST
Hitesh is now responsible for watching bugs in the [Viewers] component area.
Comment 2 Eclipse Webmaster CLA 2019-09-06 15:30:29 EDT
This bug hasn't had any activity in quite some time. Maybe the problem got resolved, was a duplicate of something else, or became less pressing for some reason - or maybe it's still relevant but just hasn't been looked at yet.

If you have further information on the current state of the bug, please add it. The information can be, for example, that the problem still occurs, that you still want the feature, that more information is needed, or that the bug is (for whatever reason) no longer relevant.
Comment 3 Eclipse Genie CLA 2021-09-12 05:57:35 EDT
This bug hasn't had any activity in quite some time. Maybe the problem got resolved, was a duplicate of something else, or became less pressing for some reason - or maybe it's still relevant but just hasn't been looked at yet. As such, we're closing this bug.

If you have further information on the current state of the bug, please add it and reopen this bug. The information can be, for example, that the problem still occurs, that you still want the feature, that more information is needed, or that the bug is (for whatever reason) no longer relevant.

--
The automated Eclipse Genie.