Dynamic menu functions

This chapter describes the built-in 4GL functions used to create dynamic menus:

• create_menu() creates a menu
• menu_add_submenu() adds groups to a menu
• menu_add_option() adds commands to a menu
• fgl_getlastwidgetid() returns the identifier of the last triggered widget
• menu_publish() publishes the menu
• execute_menu() monitors the state of the menu and returns the action_id of the menu option activated by the user

With Material Design, all the menus get a button, Show / Hide all items, that allows collapsing and expanding all the menu groups at once.

This button appears for all the menus regardless of how they were created – by the corresponding widgets in Lycia Form Designer, by 4gl functions, or via ui methods.

This behavior doesn't apply to ring menus created by the MENU statement.

In jquery Lycia, this button is absent: