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
}
			catch ( ChartException ex )
			{
				ChartWizard.displayException( ex );
			}
		}
		else if ( e.getSource( ).equals( btnAdvanced ) )
		{
			bAdvanced = !bAdvanced;
			btnAdvanced.setText( getAdvancedButtonText( bAdvanced ) );
			grpParameters.setVisible( bAdvanced );
			this.slValues.topControl = cmpURL;
			grpValue.layout( true, true );
		}
		else if ( e.getSource( ).equals( btnTooltipExpBuilder ) )
		{
			try
			{
				
				
				String sExpr = wizardContext.getUIServiceProvider( )
						.invoke( IUIServiceProvider.COMMAND_EXPRESSION_TRIGGERS_SIMPLE,
								txtTooltipText.getText( ),
								wizardContext.getExtendedItem( ),
								null );
				txtTooltipText.setText( sExpr );
			}
			catch ( ChartException e1 )
			{
				WizardBase.displayException( e1 );