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.
UI/org.eclipse.birt.report.designer.ui.editors.schematic/src/org/eclipse/birt/report/designer/internal/ui/editors/script/JSEditor.java
if ( cmbExpList.getItemCount( ) > 0 )
				{
					enableEditor( );
					
					selectItemInComboExpList( (ISelection) selectionMap.get( getModel( ) ) );
				}
				else
				{
					disableEditor( );
				}
				/*
				 * if ( editObject instanceof ExtendedItemHandle ) {
				 * setEditorText( ( (ExtendedItemHandle) editObject
				 * ).getExternalScript( ) ); context.setVariable( "this",
				 * "org.eclipse.birt.report.model.api.ExtendedItemHandle" );
				 *  $NON-NLS-2$ }
				 */
				checkDirty( );
				palettePage.getSupport( ).updateParametersTree( );
			}
			else
			{
				disableEditor( );
				cmbExpList.removeAll( );
				cmbSubFunctions.removeAll( );
				cmbItemLastSelected = null;
				palettePage.getSupport( ).setCurrentEditObject( null );
			}
			if ( sel.length > 0 )
			{