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
if ( cmbActionType.getSelectionIndex( ) == 0 )
		{
			return null;
		}
		ActionValue value = null;
		switch ( getTriggerIndex( ) )
		{
			case INDEX_1_URL_REDIRECT :
				value = URLValueImpl.create( sBaseURL, null,
						
						txtBaseParm.getText( ),
						txtValueParm.getText( ),
						txtSeriesParm.getText( ) );
				break;
			case INDEX_2_TOOLTIP :
				
				
				value = TooltipValueImpl.create( 200, "" ); 
				( (TooltipValue) value ).setText( txtTooltipText.getText( ) );
				break;
			case INDEX_3_TOOGLE_VISABILITY :
				value = AttributeFactory.eINSTANCE.createSeriesValue( );
				( (SeriesValue) value ).setName( "" ); 
				break;
			case INDEX_4_SCRIPT :
				value = AttributeFactory.eINSTANCE.createScriptValue( );
				( (ScriptValue) value ).setScript( txtScript.getText( ) );
				break;
			case INDEX_5_HIGHLIGHT :
				value = AttributeFactory.eINSTANCE.createSeriesValue( );