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(mouse-drag-mode-line): New function (from mldrag.el,

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but changed a little).  Put it on mode-line down-mouse-1.
(mouse-select-window): Bind to mode-line drag-mouse-1.
This commit is contained in:
Richard M. Stallman 1994-08-11 20:35:31 +00:00
parent 1f4554cc4d
commit 544e7e7356
1 changed files with 108 additions and 0 deletions
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108
lisp/mouse.el
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@ -39,6 +39,8 @@
(defvar mouse-yank-at-point nil
"*If non-nil, mouse yank commands yank at point instead of at click.")
;; Commands that operate on windows.
(defun mouse-minibuffer-check (event)
(let ((w (posn-window (event-start event))))
(and (window-minibuffer-p w)
@ -113,6 +115,110 @@ This command must be bound to a mouse click."
(split-window-horizontally
(min (max new-width first-col) last-col))))))
(defun mouse-drag-mode-line (start-event)
"Change the height of a window by dragging on the mode line."
(interactive "e")
(let ((done nil)
(echo-keystrokes 0)
(start-event-frame (window-frame (car (car (cdr start-event)))))
(start-event-window (car (car (cdr start-event))))
(start-nwindows (count-windows t))
(old-selected-window (selected-window))
should-enlarge-minibuffer
event mouse minibuffer y top bot edges wconfig params growth)
(setq params (frame-parameters))
(if (and (not (setq minibuffer (cdr (assq 'minibuffer params))))
(one-window-p t))
(error "Attempt to resize sole window"))
(track-mouse
(progn
;; enlarge-window only works on the selected window, so
;; we must select the window where the start event originated.
;; unwind-protect will restore the old selected window later.
(select-window start-event-window)
;; if this is the bottommost ordinary window, then to
;; move its modeline the minibuffer must be enlarged.
(setq should-enlarge-minibuffer
(and minibuffer
(not (one-window-p t))
(= (nth 1 (window-edges minibuffer))
(nth 3 (window-edges)))))
;; loop reading events and sampling the position of
;; the mouse.
(while (not done)
(setq event (read-event)
mouse (mouse-position))
;; do nothing if
;; - there is a switch-frame event.
;; - the mouse isn't in the frame that we started in
;; - the mouse isn't in any Emacs frame
;; drag if
;; - there is a mouse-movement event
;; - there is a scroll-bar-movement event
;; (same as mouse movement for our purposes)
;; quit if
;; - there is a keyboard event or some other unknown event
;; unknown event.
(cond ((integerp event)
(setq done t))
((eq (car event) 'switch-frame)
nil)
((not (memq (car event)
'(mouse-movement scroll-bar-movement)))
(if (consp event)
(setq unread-command-events
(cons event unread-command-events)))
(setq done t))
((not (eq (car mouse) start-event-frame))
nil)
((null (car (cdr mouse)))
nil)
(t
(setq y (cdr (cdr mouse))
edges (window-edges)
top (nth 1 edges)
bot (nth 3 edges))
;; scale back a move that would make the
;; window too short.
(cond ((< (- y top -1) window-min-height)
(setq y (+ top window-min-height -1))))
;; compute size change needed
(setq growth (- y bot -1)
wconfig (current-window-configuration))
;; grow/shrink minibuffer?
(if should-enlarge-minibuffer
(progn
;; yes. briefly select minibuffer so
;; enlarge-window will affect the
;; correct window.
(select-window minibuffer)
;; scale back shrinkage if it would
;; make the minibuffer less than 1
;; line tall.
(if (and (> growth 0)
(< (- (window-height minibuffer)
growth)
1))
(setq growth (1- (window-height minibuffer))))
(enlarge-window (- growth))
(select-window start-event-window))
;; no. grow/shrink the selected window
(enlarge-window growth))
;; if this window's growth caused another
;; window to be deleted because it was too
;; short, rescind the change.
;;
;; if size change caused space to be stolen
;; from a window above this one, rescind the
;; change, but only if we didn't grow/srhink
;; the minibuffer. minibuffer size changes
;; can cause all windows to shrink... no way
;; around it.
(if (or (/= start-nwindows (count-windows t))
(and (not should-enlarge-minibuffer)
(/= top (nth 1 (window-edges)))))
(set-window-configuration wconfig)))))))))
(defun mouse-set-point (event)
"Move point to the position clicked on with the mouse.
This should be bound to a mouse click event type."
@ -1343,6 +1449,8 @@ and selects that window."
;; (global-set-key [S-mouse-1] 'mouse-set-mark)
(global-set-key [mode-line mouse-1] 'mouse-select-window)
(global-set-key [mode-line drag-mouse-1] 'mouse-select-window)
(global-set-key [mode-line down-mouse-1] 'mouse-drag-mode-line)
(global-set-key [mode-line mouse-2] 'mouse-delete-other-windows)
(global-set-key [mode-line mouse-3] 'mouse-delete-window)
(global-set-key [mode-line C-mouse-2] 'mouse-split-window-horizontally)