OLD BUG is back: Heavy JClient Bug regarding to scrolling within a JTable.....

Question

Hi,
I'm just evaluating the new features of JDev 9.0.3.988 (preview) and found an old bug back again!
see: Re: Fetching data from database for login
The current behaviour is slightly different:
You have a generated JClient form displaying a table. There are more rows than the table can show at once. You scroll down with the cursor keys until some new rows are fetched. Now scroll up again. Make sure you only use cursor keys. If you reach the upper area of the table you can see that the StatusBar isn't refreshing it's current row counter and all possibly connected fields to the same binding don't update themself either.
You can see this behavior by using only wizard generated source code based on the SCOTT/TIGER schema.
This bug should have been definitively fixed in a previous beta version...
Can anyone give a comment on this?
Thanks in advance,
Torsten.

Answer 1

This bugfix doesn't work!!!!!!
It makes the table scrollable via cursor keys, but now scrolling with the mouse isn't possible anymore!!!!I see the bug when you apply the above mentioned workaround that leads to scrolling due to double handlers for valueChanged event
Lets try to fix this in the JUTableBinding source. From my test runs on the when the same fix is applied on JUTableBinding source, the scroll works fine in both key/mouse modes.
Let us know if you find otherwise.
The fix in JUTableBinding is:
Look up source for JUTableBinding in your setup. (It'd be in (JDEVHOME)\bc4j\src\bc4juisrc.zip
Save a copy in your current project in the project's source path maintaining the class's package structure - save the file into sourcepath\oracle\jbo\uicli\jui\JUTableBinding.java
Replace the existing valueChanged method with the following:
      public void valueChanged(ListSelectionEvent event)
         try
            ListSelectionModel listSelModel = (ListSelectionModel) event.getSource();
            if (mSelRowInProg || listSelModel.getValueIsAdjusting())
               return;
            RowIterator iter = getRowIterator();
            if (!listSelModel.isSelectionEmpty())
               if (iter == null)
                  return;
               int selectTabRowIndex = listSelModel.getMinSelectionIndex();
               if (getFormBinding() != null)
                  ((JUPanelBinding)getFormBinding()).callBeforeRowNavigated(getIteratorBinding());
               int idx = selectTabRowIndex - iter.getRangeStart();
               if (idx >= iter.getRangeSize())
                  idx = idx - iter.getRangeSize() + 1;
                  iter.scrollRange(idx);
                  idx = selectTabRowIndex - iter.getRangeStart();
               else if (idx < 0)
                  iter.scrollRange(idx);
                  idx = 0;
               iter.setCurrentRowAtRangeIndex(idx);
         catch(Exception ex)
            reportException(ex);
            refresh(true /*selectRow*/);
This is a really heavy bug making the whole JUTableBinding useless... any comments on this? :((