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/LineAttributesComposite.java
cmbColor.setEnabled( bEnableUI );
			}
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.swt.events.SelectionListener#widgetSelected(org.eclipse.swt.events.SelectionEvent)
	 */
	public void widgetDefaultSelected( SelectionEvent e )
	{
	}
	private void fireValueChangedEvent( int iEventType, Object data )
	{
		for ( int iL = 0; iL < vListeners.size( ); iL++ )
		{
			Event se = new Event( );
			se.widget = this;
			se.data = data;
			se.type = iEventType;
			( (Listener) vListeners.get( iL ) ).handleEvent( se );
		}
	}
	/*
	 * Converts the specified SWT line style constant to a chart model's
	 * LineStyle object
	 */
	private LineStyle getModelLineStyle( int iStyle )
	{
		switch ( iStyle )