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
{
		isModified = b;
	}
	private boolean isCodeModified( )
	{
		return isModified;
	}
	protected void markDirty( )
	{
		if ( !isModified )
		{
			setIsModified( true );
			( (IFormPage) editingDomainEditor ).getEditor( )
					.editorDirtyStateChanged( );
			firePropertyChange( PROP_DIRTY );
		}
	}
	/**
	 * Enables the editor UI components
	 */
	private void enableEditor( )
	{
		if ( editorUIEnabled == false )
		{
			getViewer( ).getTextWidget( ).setEnabled( true );
			cmbExpList.setEnabled( true );
			butReset.setEnabled( true );
			butValidate.setEnabled( true );
			editorUIEnabled = true;
		}