Bug 201042 [Accessibility]Chart scritp should not add by auto when click the down in keyboard[17]
Description: Chart scritp should not add by auto when click the down in keyboard[0704] Step: 1. New a chart and switch to script view. 2. Let the point on the script function selection. 3. Click the down on keyboard. Actual result: A function will add by auto. Expected result: Customer can not select the function under the second function by keyboard, and it should not be added by auto.
chart/org.eclipse.birt.chart.ui.extension/src/org/eclipse/birt/chart/ui/swt/composites/TriggerDataComposite.java
}
		}
		else if ( e.getSource( ).equals( btnScriptExpBuilder ) )
		{
			try
			{
				String sExpr = wizardContext.getUIServiceProvider( )
						.invoke( getExpressionBuilderCommand( ),
								txtScript.getText( ),
								wizardContext.getExtendedItem( ),
								null );
				txtScript.setText( sExpr );
			}
			catch ( ChartException e1 )
			{
				WizardBase.displayException( e1 );
			}
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.swt.events.SelectionListener#widgetDefaultSelected(org.eclipse.swt.events.SelectionEvent)
	 */
	public void widgetDefaultSelected( SelectionEvent e )
	{
	}
	private String getActionText( Trigger trigger )
	{
		return LiteralHelper.actionTypeSet.getDisplayNameByName( trigger.getAction( )