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
btnTooltipExpBuilder.setLayoutData( gdBTNBuilder );
			btnTooltipExpBuilder.setImage( UIHelper.getImage( "icons/obj16/expressionbuilder.gif" ) ); 
			btnTooltipExpBuilder.addSelectionListener( this );
			btnTooltipExpBuilder.setToolTipText( Messages.getString( "DataDefinitionComposite.Tooltip.InvokeExpressionBuilder" ) ); 
			btnTooltipExpBuilder.getImage( ).setBackground( btnTooltipExpBuilder.getBackground( ) );
			addDescriptionLabel( cmpTooltip,
					3,
					Messages.getString( "TriggerDataComposite.Label.TooltipUsingDataLabelOfSeries" ) ); 
		}
		
		cmpURL = new Composite( grpValue, SWT.NONE );
		cmpURL.setLayout( glURL );
		Label lblBaseURL = new Label( cmpURL, SWT.NONE );
		GridData gdLBLBaseURL = new GridData( );
		gdLBLBaseURL.horizontalIndent = 2;
		lblBaseURL.setLayoutData( gdLBLBaseURL );
		lblBaseURL.setText( Messages.getString( "TriggerDataComposite.Lbl.BaseURL" ) ); 
		btnBaseURL = new Button( cmpURL, SWT.NONE );
		{
			GridData gd = new GridData( );
			btnBaseURL.setLayoutData( gd );
			btnBaseURL.setText( Messages.getString( "TriggerDataComposite.Text.EditBaseURL" ) ); 
			btnBaseURL.setToolTipText( Messages.getString( "TriggerDataComposite.Tooltip.InvokeURLBuilder" ) ); 
			btnBaseURL.addSelectionListener( this );
			btnBaseURL.setEnabled( wizardContext.getUIServiceProvider( )
					.isInvokingSupported( ) );
			
			
			
		}