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Synchronizing Multiple TableViewers [message #633713]

Tue, 19 October 2010 04:35

Jon Svede

Messages: 83
Registered: July 2009

Member

I have 4 TableViewers on one Composite in an Editor and I need to synchronize all four to scroll when one is scrolled. I was able to make it so
that when I scroll 1 table, the scroll bar of a second will move. However, the table itself does not move. Here is the code:

        final Table right = rightTableViewer.getTable() ;
        final Table left = leftTableViewer.getTable() ;
        
        ((Scrollable) left).getHorizontalBar().addSelectionListener(new
            SelectionAdapter() {
              public void widgetSelected(SelectionEvent event) {
                ((Scrollable) right).getHorizontalBar().setSelection(
                  ((Scrollable) left).getHorizontalBar().getSelection());
                netFuelConsumptionTableViewer.refresh() ;
              }
            }
          );

        ((Scrollable) right).getHorizontalBar().addSelectionListener(new
            SelectionAdapter() {
              public void widgetSelected(SelectionEvent event) {
                ((Scrollable) left).getHorizontalBar().setSelection(
                  ((Scrollable) right).getHorizontalBar().getSelection());
               netStockTableViewer.refresh() ;
              }
            }
          );

This is only using two of the four tables. Is this incorrect? Is there some other way to make these scroll in unison and have the actual table scroll and not just the scroll bar?

Any pointers will be greatly appreciated!

Jon

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Re: Synchronizing Multiple TableViewers [message #633844 is a reply to message #633713]

Tue, 19 October 2010 14:48

Grant Gayed

Messages: 2150
Registered: July 2009

Senior Member

Tables don't react to programmatic changes to their scrollbars. You need to
use Table API like: right.setTopIndex(left.getTopIndex()).

If you want finer-grained scrolling control than this then you can wrap them
in ScrolledComposites, but this is more work (Tree snippet that shows this:
http://dev.eclipse.org/viewcvs/index.cgi/%7Echeckout%7E/org. eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet296 .java )
..

Grant

"Jon Svede" <jsvede@yahoo.com> wrote in message
news:i9j761$hqh$1@news.eclipse.org...
>I have 4 TableViewers on one Composite in an Editor and I need to
>synchronize all four to scroll when one is scrolled. I was able to make it
>so that when I scroll 1 table, the scroll bar of a second will move.
>However, the table itself does not move. Here is the code:
>
>
> final Table right = rightTableViewer.getTable() ;
> final Table left = leftTableViewer.getTable() ;
> ((Scrollable) left).getHorizontalBar().addSelectionListener(new
> SelectionAdapter() {
> public void widgetSelected(SelectionEvent event) {
> ((Scrollable) right).getHorizontalBar().setSelection(
> ((Scrollable) left).getHorizontalBar().getSelection());
> netFuelConsumptionTableViewer.refresh() ;
> }
> }
> );
>
> ((Scrollable) right).getHorizontalBar().addSelectionListener(new
> SelectionAdapter() {
> public void widgetSelected(SelectionEvent event) {
> ((Scrollable) left).getHorizontalBar().setSelection(
> ((Scrollable) right).getHorizontalBar().getSelection());
> netStockTableViewer.refresh() ;
> }
> }
> );
>
>
> This is only using two of the four tables. Is this incorrect? Is there
> some other way to make these scroll in unison and have the actual table
> scroll and not just the scroll bar?
> Any pointers will be greatly appreciated!
>
> Jon
>

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