/usr/share/common-lisp/source/mcclim/menu-choose.lisp is in cl-mcclim 0.9.6.dfsg.cvs20100315-2.
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;;; (c) copyright 2002 by Alexey Dejneka (adejneka@comail.ru)
;;; This library is free software; you can redistribute it and/or
;;; modify it under the terms of the GNU Library General Public
;;; License as published by the Free Software Foundation; either
;;; version 2 of the License, or (at your option) any later version.
;;;
;;; This library is distributed in the hope that it will be useful,
;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;;; Library General Public License for more details.
;;;
;;; You should have received a copy of the GNU Library General Public
;;; License along with this library; if not, write to the
;;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;;; Boston, MA 02111-1307 USA.
;;; Long time TODO (if someone wants to implement them - you are welcome):
;;;
;;; - Menu item options: :items, :type.
;;;
;;; - VIEW.
;;;
;;; - Caching.
;;;
;;; - Default item.
;;; Mid time TODO:
;;;
;;; - Documentation.
;;;
;;; - Empty menu.
;;;
;;; - :DIVIDER type menu items.
(in-package :clim-internals)
;; Spec function.
(defgeneric menu-choose
(items
&key associated-window printer presentation-type default-item
text-style label cache unique-id id-test cache-value cache-test
max-width max-height n-rows n-columns x-spacing y-spacing row-wise
cell-align-x cell-align-y scroll-bars pointer-documentation))
;; Spec function.
(defgeneric frame-manager-menu-choose
(frame-manager items
&key associated-window printer presentation-type default-item
text-style label cache unique-id id-test cache-value cache-test
max-width max-height n-rows n-columns x-spacing y-spacing row-wise
cell-align-x cell-align-y scroll-bars pointer-documentation))
;; Spec function.
(defgeneric menu-choose-from-drawer
(menu presentation-type drawer
&key x-position y-position cache unique-id id-test cache-value cache-test
default-presentation pointer-documentation))
(defgeneric adjust-menu-size-and-position (menu &key x-position y-position)
(:documentation "Adjust the size of the menu so it fits
properly on the screen with regards to the menu entries. `menu'
should be the menu pane. This is an internal,
non-specification-defined function."))
(defun menu-item-value (menu-item)
(cond ((atom menu-item)
menu-item)
((atom (cdr menu-item))
(cdr menu-item))
(t (getf (cdr menu-item) :value (car menu-item)))))
(defun menu-item-display (menu-item)
(if (atom menu-item)
menu-item
(car menu-item)))
(defun menu-item-options (menu-item)
(if (and (consp menu-item)
(consp (cdr menu-item)))
(cdr menu-item) ; XXX Remove :VALUE?
nil))
(defun menu-item-option (menu-item option &optional default)
(if (listp menu-item)
(getf (menu-item-options menu-item) option default)
default))
(defun print-menu-item (menu-item &optional (stream *standard-output*))
(let ((style (getf (menu-item-options menu-item) :style '(nil nil nil))))
(with-text-style (stream style)
(if (menu-item-option menu-item :active t)
(princ (menu-item-display menu-item) stream)
(with-drawing-options (stream :ink (compose-over
(compose-in
; XXX it should be (MEDIUM-INK),
; but CLX backend is too stupid.
; -- APD, 2002-08-07
(medium-foreground stream)
(make-opacity 0.5))
(medium-background stream)))
(princ (menu-item-display menu-item) stream))))))
;; Spec function.
(defun draw-standard-menu
(stream presentation-type items default-item
&key item-printer
max-width max-height n-rows n-columns x-spacing y-spacing row-wise
cell-align-x cell-align-y)
(declare (ignore default-item))
(orf item-printer #'print-menu-item)
(format-items items
:stream stream
:printer
(lambda (item stream)
(ecase (menu-item-option item :type :item)
(:item
;; This is a normal item, just output.
(let ((activep (menu-item-option item :active t)))
(with-presentation-type-decoded (name params options)
presentation-type
(let ((*allow-sensitive-inferiors* activep))
(with-text-style
(stream (menu-item-option
item :style
'(:sans-serif nil nil)))
(with-output-as-presentation
(stream
item
`((,name ,@params)
:description ,(getf (menu-item-options item) :documentation)
,@options))
(funcall item-printer item stream)))))))
(:label
;; This is a static label, it should not be
;; mouse-sensitive, but not grayed out either.
(with-text-style (stream (menu-item-option
item :style
'(:sans-serif nil nil)))
(funcall item-printer item stream)))
(:divider
;; FIXME: Should draw a line instead.
(with-text-style (stream (menu-item-option
item :style
'(:sans-serif :italic nil)))
(funcall item-printer item stream)))))
:presentation-type nil
:x-spacing x-spacing
:y-spacing y-spacing
:n-columns n-columns
:n-rows n-rows
:max-width max-width
:max-height max-height
:cell-align-x cell-align-x
:cell-align-y (or cell-align-y :top)
:row-wise row-wise))
(defclass menu-pane (clim-stream-pane)
()
(:default-initargs :background *3d-normal-color*))
;; Spec macro.
(defmacro with-menu ((menu &optional associated-window
&key (deexpose t) label scroll-bars)
&body body)
(check-type menu symbol)
(with-gensyms (with-menu-cont)
`(flet ((,with-menu-cont (,menu)
,@body))
(declare (dynamic-extent #',with-menu-cont))
(invoke-with-menu #',with-menu-cont
,associated-window ; XXX
',deexpose ; XXX!!!
,label
,scroll-bars))))
(defun invoke-with-menu (continuation associated-window deexpose
label scroll-bars)
(let* ((associated-frame (if associated-window
(pane-frame associated-window)
*application-frame*))
(fm (frame-manager associated-frame)))
(with-look-and-feel-realization (fm associated-frame) ; hmm... checkme
(let* ((menu-stream (make-pane-1 fm associated-frame 'menu-pane))
(container (scrolling (:scroll-bar scroll-bars)
menu-stream))
(frame (make-menu-frame (raising ()
(if label
(labelling (:label label
:name 'label
:label-alignment :top)
container)
container))
:left nil
:top nil)))
(adopt-frame fm frame)
(unwind-protect
(progn
(setf (stream-end-of-line-action menu-stream) :allow
(stream-end-of-page-action menu-stream) :allow)
(funcall continuation menu-stream))
(when deexpose ; Checkme as well.
(disown-frame fm frame)))))))
(define-presentation-type menu-item ())
(defmethod menu-choose
(items &rest args &key associated-window &allow-other-keys)
(let* ((associated-frame (if associated-window
(pane-frame associated-window)
*application-frame*))
(frame-manager (frame-manager associated-frame)))
(apply #'frame-manager-menu-choose frame-manager items args)))
(defmethod frame-manager-menu-choose
(frame-manager items ; XXX specialize on STANDARD-FRAME-MANAGER
&rest options
&key associated-window printer presentation-type
(default-item nil default-item-p)
text-style label cache unique-id id-test cache-value cache-test
max-width max-height n-rows (n-columns 1) x-spacing y-spacing row-wise
cell-align-x cell-align-y (scroll-bars :vertical)
;; We provide pointer documentation by default.
(pointer-documentation *pointer-documentation-output*))
(flet ((drawer (stream type)
(draw-standard-menu stream type items
(if default-item-p
default-item
(first items))
:item-printer (or printer
#'print-menu-item)
:max-width max-width
:max-height max-height
:n-rows n-rows
:n-columns n-columns
:x-spacing x-spacing
:y-spacing y-spacing
:row-wise row-wise
:cell-align-x cell-align-x
:cell-align-y cell-align-y)))
(multiple-value-bind (object event)
(with-menu (menu associated-window
:label label
:scroll-bars scroll-bars)
(when text-style
(setf (medium-text-style menu) text-style))
(letf (((stream-default-view menu) +textual-menu-view+))
(menu-choose-from-drawer menu (or presentation-type 'menu-item)
#'drawer
:cache cache
:unique-id unique-id
:id-test id-test
:cache-value cache-value
:cache-test cache-test
:pointer-documentation pointer-documentation)))
(unless (null event) ; Event is NIL if user aborted.
(let ((subitems (menu-item-option object :items 'menu-item-no-items)))
(if (eq subitems 'menu-item-no-items)
(values (menu-item-value object) object event)
(apply #'frame-manager-menu-choose
frame-manager subitems
options)))))))
(defun max-x-y (frame)
"Return the maximum X and Y coordinate values for a menu for
`frame' (essentially, the screen resolution with a slight
padding.)"
;; FIXME? There may be a better way.
(let* ((port (port (frame-manager frame)))
(graft (find-graft :port port)))
(values (- (graft-width graft) 50)
(- (graft-height graft) 50))))
(defun menu-size (menu frame)
"Return two values, the height and width of MENU (adjusted for
maximum size according to `frame')."
(multiple-value-bind (max-width max-height)
(max-x-y frame)
(with-bounding-rectangle* (x1 y1 x2 y2) menu
(declare (ignore x1 y1))
(values (min x2 max-width)
(min y2 max-height)))))
(defmethod adjust-menu-size-and-position ((menu menu-pane)
&key x-position y-position)
;; Make sure the menu isn't higher or wider than the screen.
(multiple-value-bind (menu-width menu-height)
(menu-size (stream-output-history menu) *application-frame*)
(change-space-requirements menu
:width menu-width
:height menu-height
:resize-frame t)
;; If we have scroll-bars, we need to do some calibration of the
;; size of the viewport.
(when (pane-viewport menu)
(multiple-value-bind (viewport-width viewport-height)
(menu-size (pane-viewport menu) *application-frame*)
(change-space-requirements (pane-scroller menu)
;; HACK: How are you supposed to
;; change the size of the viewport?
;; I could only find this way, where
;; I calculate the size difference
;; between the viewport and the
;; scroller pane, and set the
;; scroller pane to the desired size
;; of the viewport, plus the
;; difference (to make room for
;; scroll bars).
:width (+ menu-width
(- (pane-current-width (pane-scroller menu))
viewport-width))
:height (+ menu-height
(- (pane-current-height (pane-scroller menu))
viewport-height))
:resize-frame t)))
;; Modify the size and location of the frame as well.
(let* ((top-level-pane (labels ((searching (pane)
(if (typep pane 'top-level-sheet-pane)
pane
(searching (sheet-parent pane)))))
(searching menu))))
(multiple-value-bind (frame-width frame-height)
(menu-size top-level-pane *application-frame*)
(multiple-value-bind (res-max-x res-max-y) (max-x-y *application-frame*)
;; Move the menu frame so that no entries are outside the visible
;; part of the screen.
(let ((max-left (- res-max-x frame-width))
(max-top (- res-max-y frame-height)))
;; XXX: This is an ugly way to find the screen position of
;; the menu frame, possibly even undefined.
(multiple-value-bind (left top)
(with-slots (dx dy) (sheet-transformation top-level-pane)
(values dx dy))
(when x-position
(setf left x-position))
(when y-position
(setf top y-position))
;; Adjust for maximum position if the programmer has not
;; explicitly provided coordinates.
(if (null x-position)
(when (> left max-left)
(setf left max-left)))
(if (null y-position)
(when (> top max-top)
(setf top max-top)))
(move-sheet top-level-pane
(max left 0) (max top 0)))))))))
(defmethod adjust-menu-size-and-position (menu &key &allow-other-keys)
;; Nothing.
nil)
;; Spec function.
(defmethod menu-choose-from-drawer
(menu presentation-type drawer
&key x-position y-position cache unique-id id-test cache-value cache-test
default-presentation pointer-documentation)
(declare (ignore cache unique-id
id-test cache-value cache-test default-presentation))
(with-room-for-graphics (menu :first-quadrant nil)
(funcall drawer menu presentation-type))
(adjust-menu-size-and-position
menu
:x-position x-position
:y-position y-position)
(let ((*pointer-documentation-output* pointer-documentation))
(let ((*pointer-documentation-output* pointer-documentation))
(handler-case
(with-input-context (`(or ,presentation-type blank-area) :override t)
(object type event)
(prog1 nil (loop (read-gesture :stream menu)))
(blank-area nil)
(t (values object event)))
(abort-gesture () nil)))))
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