Managing Pages in Tabset Frames

Within a Tabset frame, whenever you interactively select a new tab a HIDDEN event is raised for the previous tabbed page frame and then a SHOWN event is raised for the new one, which pops to the front. The HIDDEN and SHOWN callbacks are only executed for tabbed page frames which provide an Open callback.

If you want to manage tabbed pages that are also radio groups, then you must supply an open callback so you can differentiate the SELECT (RTOGGLE) event and the (page) SHOWN event.

Setting a tabbed page frame's VISIBLE property, for example, !this.TabbedPage.visible = true, selects it and gives it focus, but does not raise HIDDEN or SHOWN events.

The example below shows a typical form method you could use as a PML open callback to handle frame events for any frame gadgets defined on a form:

define method .frameEvents(!frame is GADGET, !event is

STRING)

 -- Frame events open callback handler

 if( !event eq 'SELECT' ) then

  --Handle radio button selection

  !selection = !frame.val

  ...

 elseif( !event eq 'SHOWN' ) then

  -- tabbed page selected

  -- modify page content

  ...

 endif

endmethod