public interface ShowContextMenuHandler
void onShowContextMenu(ShowContextMenuEvent event)
Note that it can be bad practice to cancel this method if the mouse is over the data
element for the item, because doing so would replace the builtin browser-default menus that users may expect. You can
DynamicForm.getEventItemInfo() to return an
info object that can be used to determine which part of the item is under the mouse.
event - the event