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/HeadStyleAttributeComposite.java
((Listener) vListeners.get(iL)).handleEvent(se);
		}
	}
	private LineDecorator getModelHeadStyle( int iStyle )
	{
		switch (iStyle){
		case 0: 
			return LineDecorator.ARROW_LITERAL;
		case 1:
			return LineDecorator.CIRCLE_LITERAL;
		case 2:
			return LineDecorator.NONE_LITERAL;
		default:
			return null;
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.swt.widgets.Listener#handleEvent(org.eclipse.swt.widgets.Event)
	 */
	public void handleEvent(Event event) 
	{
		if (cmbHeadStyle != null && cmbHeadStyle.equals(event.widget)) {
			fireValueChangedEvent(HeadStyleAttributeComposite.STYLE_CHANGED_EVENT,
					getModelHeadStyle(cmbHeadStyle.getHeadStyle()));
		}
	}
}