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
boolean bEnableShowTooltipValue )
	{
		super( parent, style );
		this.wizardContext = wizardContext;
		this.bEnableURLParameters = bEnableURLParameters;
		this.bEnableShowTooltipValue = bEnableShowTooltipValue;
		this.triggersList = triggers;
		this.triggerMatrix = new TriggerSupportMatrix( wizardContext.getOutputFormat( ),
				iInteractivityType );
		init( );
		placeComponents( );
		addDisposeListener( new DisposeListener( ) {
			public void widgetDisposed( DisposeEvent e )
			{
				if ( needSaveWhenDisposing )
				{
					
					updateTrigger( cmbTriggerType.getText( ) );
				}
			}
		} );
	}
	private void init( )
	{
		this.setSize( getParent( ).getClientArea( ).width,
				getParent( ).getClientArea( ).height );
		triggersMap = new HashMap( );
		for ( int i = 0; i < triggersList.size( ); i++ )
		{
			Trigger trigger = (Trigger) triggersList.get( i );