Eirik Bakke created NETBEANS-5728:
-------------------------------------
Summary: OutlineView drag-and-drop selects spurious nodes
Key: NETBEANS-5728
URL: https://issues.apache.org/jira/browse/NETBEANS-5728
Project: NetBeans
Issue Type: Improvement
Components: platform - Outline&TreeTable
Affects Versions: 12.2
Environment: Primarily MacOS, but also occasionally on Windows.
Reporter: Eirik Bakke
In an OutlineView with multiple selection enabled, if the user tries to drag
one row to a different position (e.g. to reorder rows when the underlying nodes
support it), additional rows will be selected as the mouse moves over them
during the drag operation. On MacOS, it happens 100% of the time. On Windows,
I've seen this bug happen in the past as well, though much less frequently. On
Windows the bug is merely annoying, but on MacOS the bug makes OutlineView's
drag-and-drop feature unusable.
To reproduce:
1) One place in the IDE where the OutlineView is used is the "Search Results"
tab. While this node tree doesn't really support reordering results, the
OutlineView can still be used to exhibit the bug. Open some project,
right-click the project node, click "Find..." and search for something that
will bring up multiple (~5 or more) results.
2) Drag the first result row a couple of rows down, holding the left mouse
button down to observe the bug. If the bug does not appear, let go and try
again until it does. On Windows, you may need to start dragging from the lower
part of the row you're trying to drag, and the dragged mouse cursor may need to
exit onto the next row within a certain time period from when the left mouse
button was pressed. On MacOS, the bug happens every time, regardless of how
long I wait hovering over the original row while holding down the mouse button
before beginning to drag across other rows.
Because the bug appears in both Windows and MacOS, albeit more rarely on
Windows, I suspect a fix that works in Windows would also fix the issue on
MacOS. Because of the timing aspect when reproducing the bug in Windows, there
appears to be some kind of race condition. Maybe there's some kind of
"selection rectangle" concept that doesn't get properly turned off in the
OutlineView.
The problem is in JTable (see
https://stackoverflow.com/questions/5969258/how-to-make-jtable-click-on-unselected-do-a-drag-instead-of-a-select
), but can be worked around in OutlineView.
(This report is a revival of the old BugZilla issue
https://bz.apache.org/netbeans/show_bug.cgi?id=230690 )
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
---------------------------------------------------------------------
To unsubscribe, e-mail: commits-unsubscr...@netbeans.apache.org
For additional commands, e-mail: commits-h...@netbeans.apache.org
For further information about the NetBeans mailing lists, visit:
https://cwiki.apache.org/confluence/display/NETBEANS/Mailing+lists
