Opening the menu by clicking a button
The menu can be opened by a button(or other element) by configuring the following options:
- openBelowContext: true, this causes the contextmenu to open at the lowerleft corner of the context.
- event: click, this is the event used to open the menu, i.e. clicking the button.
The options.startLeftOffset and options.startTopOffset properties can be used to offset the position of the menu relative to the lowerleft corner of it's context.