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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 | |
9adccb27 |
18 | ;; $Id: gcallback.lisp,v 1.12 2004-11-06 21:39:58 espen Exp $ |
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19 | |
20 | (in-package "GLIB") |
21 | |
22 | (use-prefix "g") |
23 | |
24 | |
34f9e1d4 |
25 | ;;;; Callback mechanism |
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26 | |
27 | (deftype gclosure () 'pointer) |
28 | |
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29 | (defbinding (callback-closure-new "clg_callback_closure_new") () gclosure |
30 | (callback-id unsigned-int) |
31 | (callback pointer) |
32 | (destroy-notify pointer)) |
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33 | |
e378b861 |
34 | (defun register-callback-function (function) |
35 | (check-type function (or null symbol function)) |
36 | (register-user-data function)) |
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37 | |
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38 | (def-callback closure-callback-marshal (c-call:void |
39 | (gclosure system-area-pointer) |
40 | (return-value system-area-pointer) |
41 | (n-params c-call:unsigned-int) |
42 | (param-values system-area-pointer) |
43 | (invocation-hint system-area-pointer) |
44 | (callback-id c-call:unsigned-int)) |
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45 | (callback-trampoline callback-id n-params param-values return-value)) |
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46 | |
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47 | (def-callback %destroy-user-data (c-call:void (id c-call:unsigned-int)) |
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48 | (destroy-user-data id)) |
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))) |
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54 | |
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55 | |
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56 | (defun callback-trampoline (callback-id n-params param-values return-value) |
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57 | (let* ((return-type (unless (null-pointer-p return-value) |
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58 | (gvalue-type return-value))) |
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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 | |
67 | (defun invoke-callback (callback-id type &rest args) |
68 | (restart-case |
69 | (apply (find-user-data callback-id) args) |
70 | (continue nil :report "Return from callback function" |
71 | (when type |
72 | (format *query-io* "Enter return value of type ~S: " type) |
73 | (force-output *query-io*) |
74 | (eval (read *query-io*)))) |
75 | (re-invoke nil :report "Re-invoke callback function" |
76 | (apply #'invoke-callback callback-id type args)))) |
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77 | |
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78 | |
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79 | ;;;; Timeouts and idle functions |
80 | |
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81 | (def-callback source-callback-marshal (c-call:void (callback-id c-call:unsigned-int)) |
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82 | (callback-trampoline callback-id 0 nil (make-pointer 0))) |
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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) |
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90 | ((callback %destroy-user-data) pointer)) |
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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) |
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97 | ((callback %destroy-user-data) pointer)) |
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98 | |
99 | |
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100 | |
101 | ;;;; Signals |
102 | |
0383dd48 |
103 | (defbinding signal-lookup (name itype) unsigned-int |
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104 | ((signal-name-to-string name) string) |
105 | (itype type-number)) |
106 | |
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107 | (defbinding signal-name () string |
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108 | (signal-id unsigned-int)) |
109 | |
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110 | (defun ensure-signal-id (signal-id instance) |
c8c48a4c |
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 | |
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116 | (defbinding signal-stop-emission (instance signal-id) nil |
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117 | (instance ginstance) |
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118 | ((ensure-signal-id signal-id instance) unsigned-int)) |
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119 | |
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120 | ; (defbinding (signal-add-emisson-hook "g_signal_add_emission_hook_full") |
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121 | ; () unsigned-int |
122 | ; (signal-id unsigned-int) |
123 | ; (closure gclosure)) |
124 | |
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125 | ; (defbinding signal-remove-emisson-hook () nil |
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126 | ; (signal-id unsigned-int) |
127 | ; (hook-id unsigned-int)) |
128 | |
0383dd48 |
129 | (defbinding (signal-has-handler-pending-p "g_signal_has_handler_pending") |
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130 | (instance signal-id &key detail blocked) boolean |
131 | (instance ginstance) |
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132 | ((ensure-signal-id signal-id instance) unsigned-int) |
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133 | ((or detail 0) quark) |
134 | (blocked boolean)) |
135 | |
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136 | (defbinding (signal-connect-closure "g_signal_connect_closure_by_id") |
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137 | (instance signal-id closure &key detail after) unsigned-int |
138 | (instance ginstance) |
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139 | ((ensure-signal-id signal-id instance) unsigned-int) |
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140 | ((or detail 0) quark) |
141 | (closure gclosure) |
142 | (after boolean)) |
143 | |
0383dd48 |
144 | (defbinding signal-handler-block () nil |
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145 | (instance ginstance) |
146 | (handler unsigned-int)) |
147 | |
0383dd48 |
148 | (defbinding signal-handler-unblock () nil |
c8c48a4c |
149 | (instance ginstance) |
150 | (handler unsigned-int)) |
151 | |
0383dd48 |
152 | (defbinding signal-handler-disconnect () nil |
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153 | (instance ginstance) |
154 | (handler unsigned-int)) |
155 | |
156 | |
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157 | (defmethod signal-connect ((gobject gobject) signal function &key after object) |
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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." |
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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)))))))) |
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171 | (signal-connect-closure gobject signal callback-id :after after))) |
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172 | |
173 | |
174 | ;;; Message logging |
175 | |
176 | ;; TODO: define and signal conditions based on log-level |
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177 | ;(defun log-handler (domain log-level message) |
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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)) |
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181 | (error "~A: ~A" domain message)) |
182 | |
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183 | (setf (extern-alien "log_handler" system-area-pointer) (callback log-handler)) |