| 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 | |
| 18 | ;; $Id: gcallback.lisp,v 1.11 2004-11-01 00:08:49 espen Exp $ |
| 19 | |
| 20 | (in-package "GLIB") |
| 21 | |
| 22 | (use-prefix "g") |
| 23 | |
| 24 | |
| 25 | ;;;; Callback mechanism |
| 26 | |
| 27 | (deftype gclosure () 'pointer) |
| 28 | |
| 29 | (defbinding (callback-closure-new "clg_callback_closure_new") () gclosure |
| 30 | (callback-id unsigned-int) |
| 31 | (callback pointer) |
| 32 | (destroy-notify pointer)) |
| 33 | |
| 34 | (defun register-callback-function (function) |
| 35 | (check-type function (or null symbol function)) |
| 36 | (register-user-data function)) |
| 37 | |
| 38 | (def-callback closure-callback-marshal |
| 39 | (void (gclosure system-area-pointer) (return-value system-area-pointer) |
| 40 | (n-params unsigned-int) (param-values system-area-pointer) |
| 41 | (invocation-hint system-area-pointer) (callback-id unsigned-int)) |
| 42 | (callback-trampoline callback-id n-params param-values return-value)) |
| 43 | |
| 44 | (def-callback %destroy-user-data (void (id unsigned-int)) |
| 45 | (destroy-user-data id)) |
| 46 | |
| 47 | (defun make-callback-closure (function) |
| 48 | (callback-closure-new |
| 49 | (register-callback-function function) |
| 50 | (callback closure-callback-marshal) (callback %destroy-user-data))) |
| 51 | |
| 52 | |
| 53 | (defun callback-trampoline (callback-id n-params param-values return-value) |
| 54 | (let* ((return-type (unless (null-pointer-p return-value) |
| 55 | (gvalue-type return-value))) |
| 56 | (args (loop |
| 57 | for n from 0 below n-params |
| 58 | collect (gvalue-get (sap+ param-values (* n +gvalue-size+)))))) |
| 59 | (let ((result (apply #'invoke-callback callback-id return-type args))) |
| 60 | (when return-type |
| 61 | (gvalue-set return-value result))))) |
| 62 | |
| 63 | |
| 64 | (defun invoke-callback (callback-id type &rest args) |
| 65 | (restart-case |
| 66 | (apply (find-user-data callback-id) args) |
| 67 | (continue nil :report "Return from callback function" |
| 68 | (when type |
| 69 | (format *query-io* "Enter return value of type ~S: " type) |
| 70 | (force-output *query-io*) |
| 71 | (eval (read *query-io*)))) |
| 72 | (re-invoke nil :report "Re-invoke callback function" |
| 73 | (apply #'invoke-callback callback-id type args)))) |
| 74 | |
| 75 | |
| 76 | ;;;; Timeouts and idle functions |
| 77 | |
| 78 | (def-callback source-callback-marshal (void (callback-id unsigned-int)) |
| 79 | (callback-trampoline callback-id 0 nil (make-pointer 0))) |
| 80 | |
| 81 | (defbinding (timeout-add "g_timeout_add_full") |
| 82 | (function interval &optional (priority 0)) unsigned-int |
| 83 | (priority int) |
| 84 | (interval unsigned-int) |
| 85 | (*source-callback-marshal* pointer) |
| 86 | ((register-callback-function function) unsigned-long) |
| 87 | ((callback %destroy-user-data) pointer)) |
| 88 | |
| 89 | (defbinding (idle-add "g_idle_add_full") |
| 90 | (function &optional (priority 0)) unsigned-int |
| 91 | (priority int) |
| 92 | (*source-callback-marshal* pointer) |
| 93 | ((register-callback-function function) unsigned-long) |
| 94 | ((callback %destroy-user-data) pointer)) |
| 95 | |
| 96 | |
| 97 | |
| 98 | ;;;; Signals |
| 99 | |
| 100 | (defbinding signal-lookup (name itype) unsigned-int |
| 101 | ((signal-name-to-string name) string) |
| 102 | (itype type-number)) |
| 103 | |
| 104 | (defbinding signal-name () string |
| 105 | (signal-id unsigned-int)) |
| 106 | |
| 107 | (defun ensure-signal-id (signal-id instance) |
| 108 | (etypecase signal-id |
| 109 | (integer signal-id) |
| 110 | (string (signal-lookup signal-id (type-number-of instance))) |
| 111 | (symbol (signal-lookup signal-id (type-number-of instance))))) |
| 112 | |
| 113 | (defbinding signal-stop-emission (instance signal-id) nil |
| 114 | (instance ginstance) |
| 115 | ((ensure-signal-id signal-id instance) unsigned-int)) |
| 116 | |
| 117 | ; (defbinding (signal-add-emisson-hook "g_signal_add_emission_hook_full") |
| 118 | ; () unsigned-int |
| 119 | ; (signal-id unsigned-int) |
| 120 | ; (closure gclosure)) |
| 121 | |
| 122 | ; (defbinding signal-remove-emisson-hook () nil |
| 123 | ; (signal-id unsigned-int) |
| 124 | ; (hook-id unsigned-int)) |
| 125 | |
| 126 | (defbinding (signal-has-handler-pending-p "g_signal_has_handler_pending") |
| 127 | (instance signal-id &key detail blocked) boolean |
| 128 | (instance ginstance) |
| 129 | ((ensure-signal-id signal-id instance) unsigned-int) |
| 130 | ((or detail 0) quark) |
| 131 | (blocked boolean)) |
| 132 | |
| 133 | (defbinding (signal-connect-closure "g_signal_connect_closure_by_id") |
| 134 | (instance signal-id closure &key detail after) unsigned-int |
| 135 | (instance ginstance) |
| 136 | ((ensure-signal-id signal-id instance) unsigned-int) |
| 137 | ((or detail 0) quark) |
| 138 | (closure gclosure) |
| 139 | (after boolean)) |
| 140 | |
| 141 | (defbinding signal-handler-block () nil |
| 142 | (instance ginstance) |
| 143 | (handler unsigned-int)) |
| 144 | |
| 145 | (defbinding signal-handler-unblock () nil |
| 146 | (instance ginstance) |
| 147 | (handler unsigned-int)) |
| 148 | |
| 149 | (defbinding signal-handler-disconnect () nil |
| 150 | (instance ginstance) |
| 151 | (handler unsigned-int)) |
| 152 | |
| 153 | |
| 154 | (defmethod signal-connect ((gobject gobject) signal function &key after object) |
| 155 | "Connects a callback function to a signal for a particular object. If :OBJECT |
| 156 | is T, the object connected to is passed as the first argument to the callback |
| 157 | function, or if :OBJECT is any other non NIL value, it is passed as the first |
| 158 | argument instead. If :AFTER is non NIL, the handler will be called after the |
| 159 | default handler of the signal." |
| 160 | (let ((callback-id |
| 161 | (make-callback-closure |
| 162 | (cond |
| 163 | ((or (eq object t) (eq object gobject)) function) |
| 164 | ((not object) |
| 165 | #'(lambda (&rest args) (apply function (cdr args)))) |
| 166 | (t |
| 167 | #'(lambda (&rest args) (apply function object (rest args)))))))) |
| 168 | (signal-connect-closure gobject signal callback-id :after after))) |
| 169 | |
| 170 | |
| 171 | ;;; Message logging |
| 172 | |
| 173 | ;; TODO: define and signal conditions based on log-level |
| 174 | ;(defun log-handler (domain log-level message) |
| 175 | (def-callback log-handler (void (domain c-string) (log-level int) |
| 176 | (message c-string)) |
| 177 | (error "~A: ~A" domain message)) |
| 178 | |
| 179 | (setf (extern-alien "log_handler" system-area-pointer) (callback log-handler)) |