c9819f3e |
1 | ;; Common Lisp bindings for GTK+ v2.0 |
2 | ;; Copyright (C) 2000 Espen S. Johnsen <esj@stud.cs.uit.no> |
3 | ;; |
4 | ;; This library is free software; you can redistribute it and/or |
5 | ;; modify it under the terms of the GNU Lesser General Public |
6 | ;; License as published by the Free Software Foundation; either |
7 | ;; version 2 of the License, or (at your option) any later version. |
8 | ;; |
9 | ;; This library is distributed in the hope that it will be useful, |
10 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | ;; Lesser General Public License for more details. |
13 | ;; |
14 | ;; You should have received a copy of the GNU Lesser General Public |
15 | ;; License along with this library; if not, write to the Free Software |
16 | ;; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
17 | |
11e1e57c |
18 | ;; $Id: gcallback.lisp,v 1.14 2004/11/07 16:04:21 espen Exp $ |
c9819f3e |
19 | |
20 | (in-package "GLIB") |
21 | |
22 | (use-prefix "g") |
23 | |
24 | |
831668e8 |
25 | ;;;; Callback mechanism |
c9819f3e |
26 | |
27 | (deftype gclosure () 'pointer) |
28 | |
831668e8 |
29 | (defbinding (callback-closure-new "clg_callback_closure_new") () gclosure |
30 | (callback-id unsigned-int) |
31 | (callback pointer) |
32 | (destroy-notify pointer)) |
c9819f3e |
33 | |
60cfb912 |
34 | (defun register-callback-function (function) |
35 | (check-type function (or null symbol function)) |
36 | (register-user-data function)) |
c9819f3e |
37 | |
7bde5a67 |
38 | (defcallback closure-callback-marshal (nil |
39 | (gclosure pointer) |
40 | (return-value gvalue) |
41 | (n-params unsigned-int) |
42 | (param-values pointer) |
43 | (invocation-hint pointer) |
44 | (callback-id unsigned-int)) |
831668e8 |
45 | (callback-trampoline callback-id n-params param-values return-value)) |
c9819f3e |
46 | |
7bde5a67 |
47 | (defcallback %destroy-user-data (nil (id unsigned-int)) |
48 | (destroy-user-data id)) |
831668e8 |
49 | |
50 | (defun make-callback-closure (function) |
51 | (callback-closure-new |
52 | (register-callback-function function) |
53 | (callback closure-callback-marshal) (callback %destroy-user-data))) |
c9819f3e |
54 | |
c9819f3e |
55 | |
831668e8 |
56 | (defun callback-trampoline (callback-id n-params param-values return-value) |
c9819f3e |
57 | (let* ((return-type (unless (null-pointer-p return-value) |
60cfb912 |
58 | (gvalue-type return-value))) |
831668e8 |
59 | (args (loop |
60 | for n from 0 below n-params |
61 | collect (gvalue-get (sap+ param-values (* n +gvalue-size+)))))) |
62 | (let ((result (apply #'invoke-callback callback-id return-type args))) |
63 | (when return-type |
64 | (gvalue-set return-value result))))) |
65 | |
66 | |
7bde5a67 |
67 | (defun invoke-callback (callback-id return-type &rest args) |
831668e8 |
68 | (restart-case |
69 | (apply (find-user-data callback-id) args) |
70 | (continue nil :report "Return from callback function" |
7bde5a67 |
71 | (when return-type |
72 | (format *query-io* "Enter return value of type ~S: " return-type) |
831668e8 |
73 | (force-output *query-io*) |
74 | (eval (read *query-io*)))) |
75 | (re-invoke nil :report "Re-invoke callback function" |
7bde5a67 |
76 | (apply #'invoke-callback callback-id return-type args)))) |
c9819f3e |
77 | |
c9819f3e |
78 | |
60cfb912 |
79 | ;;;; Timeouts and idle functions |
80 | |
7bde5a67 |
81 | (defcallback source-callback-marshal (nil (callback-id unsigned-int)) |
831668e8 |
82 | (callback-trampoline callback-id 0 nil (make-pointer 0))) |
60cfb912 |
83 | |
84 | (defbinding (timeout-add "g_timeout_add_full") |
85 | (function interval &optional (priority 0)) unsigned-int |
86 | (priority int) |
87 | (interval unsigned-int) |
88 | (*source-callback-marshal* pointer) |
89 | ((register-callback-function function) unsigned-long) |
831668e8 |
90 | ((callback %destroy-user-data) pointer)) |
60cfb912 |
91 | |
92 | (defbinding (idle-add "g_idle_add_full") |
93 | (function &optional (priority 0)) unsigned-int |
94 | (priority int) |
95 | (*source-callback-marshal* pointer) |
96 | ((register-callback-function function) unsigned-long) |
831668e8 |
97 | ((callback %destroy-user-data) pointer)) |
60cfb912 |
98 | |
99 | |
c9819f3e |
100 | |
101 | ;;;; Signals |
102 | |
3f4249c7 |
103 | (defbinding signal-lookup (name itype) unsigned-int |
c9819f3e |
104 | ((signal-name-to-string name) string) |
105 | (itype type-number)) |
106 | |
3f4249c7 |
107 | (defbinding signal-name () string |
c9819f3e |
108 | (signal-id unsigned-int)) |
109 | |
7eec806d |
110 | (defun ensure-signal-id (signal-id instance) |
c9819f3e |
111 | (etypecase signal-id |
112 | (integer signal-id) |
113 | (string (signal-lookup signal-id (type-number-of instance))) |
114 | (symbol (signal-lookup signal-id (type-number-of instance))))) |
115 | |
3f4249c7 |
116 | (defbinding signal-stop-emission (instance signal-id) nil |
c9819f3e |
117 | (instance ginstance) |
7eec806d |
118 | ((ensure-signal-id signal-id instance) unsigned-int)) |
c9819f3e |
119 | |
3f4249c7 |
120 | ; (defbinding (signal-add-emisson-hook "g_signal_add_emission_hook_full") |
c9819f3e |
121 | ; () unsigned-int |
122 | ; (signal-id unsigned-int) |
123 | ; (closure gclosure)) |
124 | |
3f4249c7 |
125 | ; (defbinding signal-remove-emisson-hook () nil |
c9819f3e |
126 | ; (signal-id unsigned-int) |
127 | ; (hook-id unsigned-int)) |
128 | |
3f4249c7 |
129 | (defbinding (signal-has-handler-pending-p "g_signal_has_handler_pending") |
c9819f3e |
130 | (instance signal-id &key detail blocked) boolean |
131 | (instance ginstance) |
7eec806d |
132 | ((ensure-signal-id signal-id instance) unsigned-int) |
c9819f3e |
133 | ((or detail 0) quark) |
134 | (blocked boolean)) |
135 | |
3f4249c7 |
136 | (defbinding (signal-connect-closure "g_signal_connect_closure_by_id") |
c9819f3e |
137 | (instance signal-id closure &key detail after) unsigned-int |
138 | (instance ginstance) |
7eec806d |
139 | ((ensure-signal-id signal-id instance) unsigned-int) |
c9819f3e |
140 | ((or detail 0) quark) |
141 | (closure gclosure) |
142 | (after boolean)) |
143 | |
3f4249c7 |
144 | (defbinding signal-handler-block () nil |
c9819f3e |
145 | (instance ginstance) |
146 | (handler unsigned-int)) |
147 | |
3f4249c7 |
148 | (defbinding signal-handler-unblock () nil |
c9819f3e |
149 | (instance ginstance) |
150 | (handler unsigned-int)) |
151 | |
3f4249c7 |
152 | (defbinding signal-handler-disconnect () nil |
c9819f3e |
153 | (instance ginstance) |
154 | (handler unsigned-int)) |
155 | |
156 | |
6d00d707 |
157 | (defmethod signal-connect ((gobject gobject) signal function &key after object) |
935a783c |
158 | "Connects a callback function to a signal for a particular object. If :OBJECT |
159 | is T, the object connected to is passed as the first argument to the callback |
160 | function, or if :OBJECT is any other non NIL value, it is passed as the first |
161 | argument instead. If :AFTER is non NIL, the handler will be called after the |
162 | default handler of the signal." |
6d00d707 |
163 | (let ((callback-id |
164 | (make-callback-closure |
165 | (cond |
166 | ((or (eq object t) (eq object gobject)) function) |
167 | ((not object) |
168 | #'(lambda (&rest args) (apply function (cdr args)))) |
169 | (t |
170 | #'(lambda (&rest args) (apply function object (rest args)))))))) |
d70890e5 |
171 | (signal-connect-closure gobject signal callback-id :after after))) |
dd181a20 |
172 | |
173 | |
174 | ;;; Message logging |
175 | |
176 | ;; TODO: define and signal conditions based on log-level |
831668e8 |
177 | ;(defun log-handler (domain log-level message) |
6baf860c |
178 | (def-callback log-handler (c-call:void (domain c-call:c-string) |
179 | (log-level c-call:int) |
180 | (message c-call:c-string)) |
dd181a20 |
181 | (error "~A: ~A" domain message)) |
182 | |
831668e8 |
183 | (setf (extern-alien "log_handler" system-area-pointer) (callback log-handler)) |
11e1e57c |
184 | |
185 | |
186 | ;;;; Convenient macros |
187 | |
188 | (defmacro def-callback-marshal (name (return-type &rest args)) |
189 | (let ((names (loop |
190 | for arg in args |
191 | collect (if (atom arg) (gensym) (first arg)))) |
192 | (types (loop |
193 | for arg in args |
194 | collect (if (atom arg) arg (second arg))))) |
195 | `(defcallback ,name (,return-type ,@(mapcar #'list names types) |
196 | (callback-id unsigned-int)) |
197 | (invoke-callback callback-id ',return-type ,@names)))) |
198 | |
199 | (defmacro with-callback-function ((id function) &body body) |
200 | `(let ((,id (register-callback-function ,function))) |
201 | (unwind-protect |
202 | (progn ,@body) |
203 | (destroy-user-data ,id)))) |
204 | |
205 | |