[FNR] Unbuffered TreeGrid Render Bug

[cschofld]

A TreeGrid with an Unbuffered View can lose rendered values.

GXT - 2.1.1, 2.2.0 RC1
GWT - 2.0.3, 2.0.4
Host mode / web mode - Both
Browser and version - All
Operating System - Any

Sample code:
Change com.extjs.gxt.samples.client.examples.treegrid.TreeGridExample.java to be unbuffered.

    ...
    final TreeGrid<ModelData> tree = new TreeGrid<ModelData>(store, cm);
    // insert following line
    tree.getTreeView().setBufferEnabled(false);
    tree.setBorders(true);
    ...

To verify the issue:

1. Run the example (Basic TreeGrid).
2. Starting at the bottom of the tree expand each node including child nodes.
3. Scroll to the bottom.

Work Around:
Override the view:

    TreeGridView view = new TreeGridView() {
        @Override
        protected void clean() {
            if (grid == null || !grid.isViewReady() || !isBufferEnabled()) {
                return;
              }
            super.clean();
        }
    };
    view.setBufferEnabled(false);
    final TreeGrid<ModelData> tree = new TreeGrid<ModelData>(store, cm);
    tree.setView(view);
    tree.setBorders(true);
    ...

Buffered
Buffered.gif
Unbuffered
Unbuffered.gif

[sven]

Thanks for reporting. This is fixed in SVN now as of revision 2202. I fixed it directly in BufferView, as it also effects normal grid with BufferView.

[Abhishek Sharma]

Could you please let us know which version of gxt contains this fix for rendering issue.

Regards
Abhi