* format-mode-line and mode-line mouse events
@ 2004-12-18 8:20 Nick Roberts
0 siblings, 0 replies; only message in thread
From: Nick Roberts @ 2004-12-18 8:20 UTC (permalink / raw)
I want to make mouse clicks on the mode-line work properly on a text terminal
(and xterm). Currently you can only drag or delete when you click anywhere on
the mode-line as before Emacs 21. I think all that is needed for the click
event is the the string (with properties) and the column number clicked on:
OBJECT
This is the object on which the click occurred. It is either
`nil' if there is no string property, or it has the form (STRING .
STRING-POS) when there is a string-type text property at the click
position.
I think I should be able to get this with:
((format-mode-line) . COL)
but it only works on part of the mode-line.
mode-line-format is pretty complex and I think format-mode-line expands it
incorrectly:
(format-mode-line mode-line-buffer-identification)
correctly gives:
#("*scratch* " 0 9 (face Buffer-menu-buffer-face help-echo "mouse-1: previous buffer, mouse-3: next buffer" local-map (keymap (header-line keymap ... ... ... ...) (mode-line keymap ... ...))) 9 12 (face Buffer-menu-buffer-face help-echo "mouse-1: previous buffer, mouse-3: next buffer" local-map (keymap (header-line keymap ... ... ... ...) (mode-line keymap ... ...))))
but the part of (format-mode-line) due to mode-line-buffer-identification is:
#("-1:** *scratch* All L2 (Lisp Interaction)-----"... 7 16 (face (Buffer-menu-buffer-face mode-line)) ...)
The keymap has been lost and, as far as I know,
(face (Buffer-menu-buffer-face mode-line)) means nothing.
Is that a bug? If so, can anyone see what is wrong with format-mode-line?
Should
(WINDOW mode-line (X . Y) TIMESTAMP
((format-mode-line) . COL) TEXT-POS (COL . ROW)
IMAGE (DX . DY) (WIDTH . HEIGHT))
work as a click event on the mode-line?
Nick
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