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RMB on a cell returning last selected cell position as null [message #1398161]

Thu, 10 July 2014 18:16

Sunny

Messages: 37
Registered: September 2011

Member

Hi Dirk,
To enable RMB on my nattable I added a uibinding like this:

uiBindingRegistry.registerMouseDownBinding( new MouseEventMatcher( SWT.NONE, GridRegion.BODY,
MouseEventMatcher.RIGHT_BUTTON ), new IMouseAction()
{

@Override
public void run( NatTable natTable, MouseEvent event )
{
int colPosition = LayerUtil.convertColumnPosition( natTable,
natTable.getColumnPositionByX( event.x ), selectionLayer );
int rowPosition = LayerUtil.convertRowPosition( natTable,
natTable.getRowPositionByY( event.y ), selectionLayer );

if( !selectionLayer.isCellPositionSelected( colPosition, rowPosition ) )
{
selectCellAction.run( natTable, event );
}

}

} );

But I found that sometimes the getLastSelectedCellPosition() on selectionLayer returns me null, which is causing some problems in my application.

Is that a correct way to implement RMB binding?

Thanks.

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Re: RMB on a cell returning last selected cell position as null [message #1398236 is a reply to message #1398161]

Thu, 10 July 2014 20:45

Dirk Fauth

Messages: 2902
Registered: July 2012

Senior Member

It looks correct.

What do you need the getLastSelectedCellPosition() for? As far as I remember that method is mainly used internally for selection movement and selection anchor handling.

Also I suggest do execute commands rather than calling run() on another action, as the run() method will again perform the transformation code to determine the coordinates.

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Re: RMB on a cell returning last selected cell position as null [message #1398666 is a reply to message #1398236]

Fri, 11 July 2014 11:59

Sunny

Messages: 37
Registered: September 2011

Member

If my table implements ISelectionProvider ( org.eclipse.jface.viewers.ISelectionProvider ) for I need to provide some selection through overridden getSelection().
I didn't see another way of providing selection other than selection layer's getLastSelectedCellPosition(). Is there a better way of getting selection from selection Layer , I mean is there another API to get selection?

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Re: RMB on a cell returning last selected cell position as null [message #1398671 is a reply to message #1398666]

Fri, 11 July 2014 12:07

Dirk Fauth

Messages: 2902
Registered: July 2012

Senior Member

For such cases NatTable ships with the RowSelectionProvider.

Check the _5054_SelectionProviderExample under Tutorial Example - Layers - Selection -SelectionProviderExample

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