Dear Pawel,
I could reproduce the same in the DSF samples provided (org.eclipse.cdt.examples.dsf.filebrowser).
Please see the modifications I made in order to reproduce this issue.
1. First I created an empty folder in Linux OS (Fedora 17) say /home/malu/emptyFolder
2. Now in the constructor of file FilesystemRootsVMNode.java, modified the run() method of update() job so that the root node is
File[] files = new File[] {new File("/home/malu/EmptyFolder")};(instead of using API File.listRoots() )
3. Now in FileBrowserDialog.java class I create a sample button too.. along with the search text box. See the snippet below :
final Button expandAll = new Button(area, SWT.PUSH);
expandAll.setText("Expand Me");
expandAll.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
fViewer.setAutoExpandLevel(ITreeModelViewer.ALL_LEVELS);
fViewer.expandAll();
}
});
...
Now just run the code, it will show : /home/malu/emptyFolder as root node. Just try to push the "Expand Me" button. We can see the flickering/blinking issue.
I have attached just the file browser sample with this mail.
Our view was developed based on this. We are also using a search text box. If we try to expand or search something it starts blinking in Linux OS and is very annoying... :(
Also please see that I haven’t yet opened a bug against this.. Shall I proceed ??
Thanks,
Malu
From: Malu Sasi
Sent: Friday, February 08, 2013 11:25 AM
To: CDT General developers list.
Subject: RE: [cdt-dev] Issue with TreeModelViewer in Linux OS
Hi Pawel,
Thank you for the quick response!!
I will update soon with a sample snippet…
Thanks,
Malu
Hi Malu,
I haven't seen this issue before, but none of the debug views use the expandAll(), method so it's possible that you've come across something new. Can you open a bug against debug platform and attach a snippet demonstrating the bug.
Thanks,
Pawel
On 02/07/2013 08:58 PM, Malu Sasi wrote:
Hi All,
We have implemented a tree viewer using TreeModelViewer (Virtual type in Lazy mode). I could see a strange behavior while running in Linux OS . If ever I try to expand the tree items using the API expandAll(), the tree starts blinking/flickering, if it fail to fetch the child nodes. But this behavior was not there in Windows.
I tried to debug the code, but it went deep into some infinite loop that always try to update the tree viewer. Please see below the relevant stack trace :
Thread [main] (Suspended)
OS._gtk_main_do_event(long) line: not available [native method]
OS.gtk_main_do_event(long) line: 8422
Display.eventProc(long, long) line: 1245
OS._gdk_window_process_updates(long, boolean) line: not available [native method]
OS.gdk_window_process_updates(long, boolean) line: 5511
Tree(Control).update(boolean, boolean) line: 4975
Tree(Control).update() line: 4966
TreeModelViewer(TreeViewer).setExpanded(Item, boolean) line: 335
TreeModelViewer(AbstractTreeViewer).internalExpandToLevel(Widget, int) line: 1757
TreeModelViewer(AbstractTreeViewer).expandToLevel(Object, int) line: 1060
TreeModelViewer(InternalTreeModelViewer).autoExpand(TreePath) line: 2063
HasChildrenUpdate.performUpdate() line: 53
ViewerUpdateMonitor$1.runInUIThread(IProgressMonitor) line: 99
UIJob$1.run() line: 95
Will it be any problem with our implementation ?
Please guide me on how I should proceed further.
Thanks in Advance,
Malu..
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