Bug 166015 Refactor designer actions to eclipse command framework
Eclipse command framework provide a more explicit way to manage UI actions contributions, we can take it's advantage to make our actions code more clean and maintainable.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/editors/parts/GraphicalEditorWithFlyoutPalette.java
part = getGraphicalViewer( ).getEditPartRegistry( )
								.get( new ListBandProxy( (SlotHandle) obj ) );
					}
				else
				{
					part = getGraphicalViewer( ).getEditPartRegistry( )
							.get( obj );
				}
				if ( part instanceof EditPart )
				{
					tempList.add( part );
				}
			}
		}
		if ( tempList.isEmpty( ) )
		{
			return null;
		}
		return tempList;
	}
	
	public void setFocus( )
	{
		if(getGraphicalViewer()!=null && getGraphicalViewer().getControl()!=null)
		{
			super.setFocus( );
		}
		return;
	}
}