1 /* GObject - GLib Type, Object, Parameter and Signal Library
2 * Copyright (C) 2001 Red Hat, Inc.
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.
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.
14 * You should have received a copy of the GNU Lesser General
15 * Public License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
17 * Boston, MA 02111-1307, USA.
20 #define G_LOG_DOMAIN "TestObject"
21 #include <glib-object.h>
24 /* --- TestIface --- */
25 #define TEST_TYPE_IFACE (test_iface_get_type ())
26 #define TEST_IFACE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), TEST_TYPE_IFACE, TestIface))
27 #define TEST_IS_IFACE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), TEST_TYPE_IFACE))
28 #define TEST_IFACE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_INTERFACE ((obj), TEST_TYPE_IFACE, TestIfaceClass))
29 typedef struct _TestIface TestIface;
30 typedef struct _TestIfaceClass TestIfaceClass;
31 struct _TestIfaceClass
33 GTypeInterface base_iface;
34 void (*print_string) (TestIface *tiobj,
37 static void iface_base_init (TestIfaceClass *iface);
38 static void iface_base_finalize (TestIfaceClass *iface);
39 static void print_foo (TestIface *tiobj,
42 test_iface_get_type (void)
44 static GType test_iface_type = 0;
48 static const GTypeInfo test_iface_info =
50 sizeof (TestIfaceClass),
51 (GBaseInitFunc) iface_base_init, /* base_init */
52 (GBaseFinalizeFunc) iface_base_finalize, /* base_finalize */
55 test_iface_type = g_type_register_static (G_TYPE_INTERFACE, "TestIface", &test_iface_info, 0);
56 g_type_interface_add_prerequisite (test_iface_type, G_TYPE_OBJECT);
59 return test_iface_type;
61 static guint iface_base_init_count = 0;
63 iface_base_init (TestIfaceClass *iface)
65 iface_base_init_count++;
66 if (iface_base_init_count == 1)
68 /* add signals here */
72 iface_base_finalize (TestIfaceClass *iface)
74 iface_base_init_count--;
75 if (iface_base_init_count == 0)
77 /* destroy signals here */
81 print_foo (TestIface *tiobj,
86 g_print ("Iface-FOO: \"%s\" from %p\n", string, tiobj);
89 test_object_test_iface_init (gpointer giface,
92 TestIfaceClass *iface = giface;
94 g_assert (iface_data == GUINT_TO_POINTER (42));
96 g_assert (G_TYPE_FROM_INTERFACE (iface) == TEST_TYPE_IFACE);
98 /* assert iface_base_init() was already called */
99 g_assert (iface_base_init_count > 0);
101 /* initialize stuff */
102 iface->print_string = print_foo;
105 iface_print_string (TestIface *tiobj,
108 TestIfaceClass *iface;
110 g_return_if_fail (TEST_IS_IFACE (tiobj));
111 g_return_if_fail (G_IS_OBJECT (tiobj)); /* ensured through prerequisite */
113 iface = TEST_IFACE_GET_CLASS (tiobj);
114 g_object_ref (tiobj);
115 iface->print_string (tiobj, string);
116 g_object_unref (tiobj);
120 /* --- TestObject --- */
121 #define TEST_TYPE_OBJECT (test_object_get_type ())
122 #define TEST_OBJECT(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), TEST_TYPE_OBJECT, TestObject))
123 #define TEST_OBJECT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), TEST_TYPE_OBJECT, TestObjectClass))
124 #define TEST_IS_OBJECT(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), TEST_TYPE_OBJECT))
125 #define TEST_IS_OBJECT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), TEST_TYPE_OBJECT))
126 #define TEST_OBJECT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), TEST_TYPE_OBJECT, TestObjectClass))
127 typedef struct _TestObject TestObject;
128 typedef struct _TestObjectClass TestObjectClass;
131 GObject parent_instance;
133 struct _TestObjectClass
135 GObjectClass parent_class;
137 gchar* (*test_signal) (TestObject *tobject,
138 TestIface *iface_object,
141 static void test_object_class_init (TestObjectClass *class);
142 static void test_object_init (TestObject *tobject);
143 static gboolean test_signal_accumulator (GSignalInvocationHint *ihint,
145 const GValue *handler_return,
147 static gchar* test_object_test_signal (TestObject *tobject,
148 TestIface *iface_object,
151 test_object_get_type (void)
153 static GType test_object_type = 0;
155 if (!test_object_type)
157 static const GTypeInfo test_object_info =
159 sizeof (TestObjectClass),
160 NULL, /* base_init */
161 NULL, /* base_finalize */
162 (GClassInitFunc) test_object_class_init,
163 NULL, /* class_finalize */
164 NULL, /* class_data */
167 (GInstanceInitFunc) test_object_init,
169 GInterfaceInfo iface_info = { test_object_test_iface_init, NULL, GUINT_TO_POINTER (42) };
171 test_object_type = g_type_register_static (G_TYPE_OBJECT, "TestObject", &test_object_info, 0);
172 g_type_add_interface_static (test_object_type, TEST_TYPE_IFACE, &iface_info);
175 return test_object_type;
178 test_object_class_init (TestObjectClass *class)
180 /* GObjectClass *gobject_class = G_OBJECT_CLASS (class); */
182 class->test_signal = test_object_test_signal;
184 g_signal_new ("test-signal",
185 G_OBJECT_CLASS_TYPE (class),
186 G_SIGNAL_RUN_FIRST | G_SIGNAL_RUN_LAST | G_SIGNAL_RUN_CLEANUP,
187 G_STRUCT_OFFSET (TestObjectClass, test_signal),
188 test_signal_accumulator, NULL,
189 g_cclosure_marshal_STRING__OBJECT_POINTER,
190 G_TYPE_STRING, 2, TEST_TYPE_IFACE, G_TYPE_POINTER);
193 test_object_init (TestObject *tobject)
197 test_signal_accumulator (GSignalInvocationHint *ihint,
199 const GValue *handler_return,
202 gchar *accu_string = g_value_get_string (return_accu);
203 gchar *new_string = g_value_get_string (handler_return);
204 gchar *result_string;
207 result_string = g_strconcat (accu_string, new_string, NULL);
209 result_string = g_strdup (new_string);
211 result_string = NULL;
213 g_value_set_string_take_ownership (return_accu, result_string);
218 test_object_test_signal (TestObject *tobject,
219 TestIface *iface_object,
222 g_message ("::test_signal default_handler called");
224 g_return_val_if_fail (TEST_IS_IFACE (iface_object), NULL);
226 return g_strdup ("<default_handler>");
230 /* --- TestIface for DerivedObject --- */
232 print_bar (TestIface *tiobj,
235 TestIfaceClass *parent_iface;
237 g_return_if_fail (TEST_IS_IFACE (tiobj));
241 g_print ("Iface-BAR: \"%s\" from %p\n", string, tiobj);
243 g_print ("chaining: ");
244 parent_iface = g_type_interface_peek_parent (TEST_IFACE_GET_CLASS (tiobj));
245 parent_iface->print_string (tiobj, string);
247 g_assert (g_type_interface_peek_parent (parent_iface) == NULL);
251 derived_object_test_iface_init (gpointer giface,
254 TestIfaceClass *iface = giface;
256 g_assert (iface_data == GUINT_TO_POINTER (87));
258 g_assert (G_TYPE_FROM_INTERFACE (iface) == TEST_TYPE_IFACE);
260 /* assert test_object_test_iface_init() was already called */
261 g_assert (iface->print_string == print_foo);
264 iface->print_string = print_bar;
268 /* --- DerivedObject --- */
269 #define DERIVED_TYPE_OBJECT (derived_object_get_type ())
270 #define DERIVED_OBJECT(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), DERIVED_TYPE_OBJECT, DerivedObject))
271 #define DERIVED_OBJECT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), DERIVED_TYPE_OBJECT, DerivedObjectClass))
272 #define DERIVED_IS_OBJECT(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), DERIVED_TYPE_OBJECT))
273 #define DERIVED_IS_OBJECT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), DERIVED_TYPE_OBJECT))
274 #define DERIVED_OBJECT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), DERIVED_TYPE_OBJECT, DerivedObjectClass))
275 typedef struct _TestObject DerivedObject;
276 typedef struct _TestObjectClass DerivedObjectClass;
278 derived_object_get_type (void)
280 static GType derived_object_type = 0;
282 if (!derived_object_type)
284 static const GTypeInfo derived_object_info =
286 sizeof (DerivedObjectClass),
287 NULL, /* base_init */
288 NULL, /* base_finalize */
289 NULL, /* class_init */
290 NULL, /* class_finalize */
291 NULL, /* class_data */
292 sizeof (DerivedObject),
294 NULL, /* instance_init */
296 GInterfaceInfo iface_info = { derived_object_test_iface_init, NULL, GUINT_TO_POINTER (87) };
298 derived_object_type = g_type_register_static (TEST_TYPE_OBJECT, "DerivedObject", &derived_object_info, 0);
299 g_type_add_interface_static (derived_object_type, TEST_TYPE_IFACE, &iface_info);
302 return derived_object_type;
312 DerivedObject *dobject;
313 gchar *string = NULL;
315 g_log_set_always_fatal (g_log_set_always_fatal (G_LOG_FATAL_MASK) |
316 G_LOG_LEVEL_WARNING |
317 G_LOG_LEVEL_CRITICAL);
318 g_type_init_with_debug_flags (G_TYPE_DEBUG_OBJECTS | G_TYPE_DEBUG_SIGNALS);
320 /* to test past class initialization interface setups, create the class here */
321 g_type_class_ref (TEST_TYPE_OBJECT);
323 dobject = g_object_new (DERIVED_TYPE_OBJECT, NULL);
324 sigarg = g_object_new (TEST_TYPE_OBJECT, NULL);
326 g_print ("MAIN: emit test-signal:\n");
327 g_signal_emit_by_name (dobject, "test-signal", sigarg, NULL, &string);
328 g_message ("signal return: \"%s\"", string);
329 g_assert (strcmp (string, "<default_handler><default_handler>") == 0);
332 g_print ("MAIN: call iface print-string on test and derived object:\n");
333 iface_print_string (TEST_IFACE (sigarg), "iface-string-from-test-type");
334 iface_print_string (TEST_IFACE (dobject), "iface-string-from-derived-type");
336 g_object_unref (sigarg);
337 g_object_unref (dobject);
339 g_message ("%s done", argv[0]);