This predicate determines if its input is a handler.
Extracts the name from a handler.
Extracts the extension from a handler.
Extracs the handler’s handling function.
This function inserts a format handler.
The string, name names the format handler for use with
handler:find-named-format-handler. If pred is a
string, it is matched with the extension of a filename by
handler:find-format-handler. If pred is a list of
strings, they are each matched with the extension of a filename by
handler:find-format-handler. If it is a function, the
filename is applied to the function and the functions result
determines if this is the handler to use.
The most recently added format handler takes precedence over all
other format handlers.
It finds a handler based on name.
It finds a handler based on filename.
This function creates a frame or re-uses an existing frame to edit a
If the preference 'framework:open-here is set to
(send (group:get-the-frame-group) get-open-here-frame)
returns a frame, the
open-here method of that frame is used
to load the file in the existing frame.
Otherwise, it invokes the appropriate format handler to open the
file (see handler:insert-format-handler).
This is a parameter that controls how the framework creates new
The default setting is this:
| (λ (filename)|
| (let ([frame (make-object frame:text-info-file% filename)])|
| (send frame show #t)|
This function queries the user for a filename and opens the file for
editing. It uses handler:edit-file
to open the file, once
the user has chosen it.
This function deletes all of the items in the given menu and adds
one menu item for each recently opened file. These menu items, when
selected, call handler:edit-file
with the filename of the
recently opened file.
The menu’s size is limited to 10.
Sets the superclass for the recently opened files frame. It must be
derived from frame:standard-menus.
Adds a filename to the list of recently opened files.
Sets the selection of the recently opened file to start and
Sizes the 'framework:recently-opened-files/pos preference
list length to num.