A few other event types represent occurrences within the system.
The standard definition of the
delete-frame event is to delete frame.
ignore; since the frame has already been iconified, Emacs has no work to do. The purpose of this event type is so that you can keep track of such events if you want to.
ignore; since the frame has already been made visible, Emacs has no work to do.
The element position is a list describing the position of the event, in the same format as used in a mouse-click event.
This kind of event is generated only on some kinds of systems. On some
mouse-5 are used instead. For
portable code, use the variables
mouse-wheel-down-event defined in mwheel.el to determine
what event types to expect for the mouse wheel.
The element position is a list describing the position of the event, in the same format as used in a mouse-click event, and files is the list of file names that were dragged and dropped. The usual way to handle this event is by visiting these files.
This kind of event is generated, at present, only on some kinds of systems.
help-echotext property. The generated event has this form:
(help-echo frame help window object pos)
The precise meaning of the event parameters and the way these parameters are used to display the help-echo text are described in Text help-echo.
SIGUSR2. They contain no additional data because signals do not carry additional information.
To catch a user signal, bind the corresponding event to an interactive
command in the
special-event-map (see Active Keymaps).
The command is called with no arguments, and the specific signal event is
last-input-event. For example:
(defun sigusr-handler () (interactive) (message "Caught signal %S" last-input-event)) (define-key special-event-map [sigusr1] 'sigusr-handler)
To test the signal handler, you can make Emacs send a signal to itself:
(signal-process (emacs-pid) 'sigusr1)
If one of these events arrives in the middle of a key sequence—that is, after a prefix key—then Emacs reorders the events so that this event comes either before or after the multi-event key sequence, not within it.blog comments powered by Disqus