gobject/testgobject.c

   1 /* GObject - GLib Type, Object, Parameter and Signal Library
   2  * Copyright (C) 2001 Red Hat, Inc.
   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
  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.
  18  */
  19 #undef  G_LOG_DOMAIN
  20 #define G_LOG_DOMAIN "TestObject"
  21 #include        <glib-object.h>
  22
  23 #define TEST_TYPE_OBJECT            (test_object_get_type ())
  24 #define TEST_OBJECT(object)         (G_TYPE_CHECK_INSTANCE_CAST ((object), TEST_TYPE_OBJECT, TestObject))
  25 #define TEST_OBJECT_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), TEST_TYPE_OBJECT, TestObjectClass))
  26 #define TEST_IS_OBJECT(object)      (G_TYPE_CHECK_INSTANCE_TYPE ((object), TEST_TYPE_OBJECT))
  27 #define TEST_IS_OBJECT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), TEST_TYPE_OBJECT))
  28 #define TEST_OBJECT_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), TEST_TYPE_OBJECT, TestObjectClass))
  29
  30 typedef struct _TestIface TestIface;
  31 typedef struct
  32 {
  33   GTypeInterface base_iface;
  34 } TestIfaceClass;
  35 typedef struct
  36 {
  37   GObject parent_instance;
  38 } TestObject;
  39
  40 #define TEST_TYPE_IFACE           (test_iface_get_type ())
  41 #define TEST_IFACE(obj)           (G_TYPE_CHECK_INSTANCE_CAST ((obj), TEST_TYPE_IFACE, TestIface))
  42 #define TEST_IS_IFACE(obj)        (G_TYPE_CHECK_INSTANCE_TYPE ((obj), TEST_TYPE_IFACE))
  43 #define TEST_IFACE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_INTERFACE ((inst), TEST_TYPE_IFACE, TestIfaceClass))
  44
  45 GType
  46 test_iface_get_type (void)
  47 {
  48   static GType test_iface_type = 0;
  49
  50   if (!test_iface_type)
  51     {
  52       static const GTypeInfo test_iface_info =
  53       {
  54         sizeof (TestIfaceClass),
  55         NULL,           /* base_init */
  56         NULL,           /* base_finalize */
  57       };
  58
  59       test_iface_type = g_type_register_static (G_TYPE_INTERFACE, "TestIface", &test_iface_info, 0);
  60       g_type_interface_add_prerequisite (test_iface_type, G_TYPE_OBJECT);
  61     }
  62
  63   return test_iface_type;
  64 }
  65
  66 typedef struct
  67 {
  68   GObjectClass parent_class;
  69
  70   gchar* (*test_signal) (TestObject *tobject,
  71                          TestIface  *iface_object,
  72                          gpointer    tdata);
  73 } TestObjectClass;
  74
  75 static void
  76 test_object_init (TestObject *tobject)
  77 {
  78 }
  79
  80 static gboolean
  81 test_signal_accumulator (GSignalInvocationHint *ihint,
  82                          GValue                *return_accu,
  83                          const GValue          *handler_return,
  84                          gpointer               data)
  85 {
  86   gchar *accu_string = g_value_get_string (return_accu);
  87   gchar *new_string = g_value_get_string (handler_return);
  88   gchar *result_string;
  89
  90   if (accu_string)
  91     result_string = g_strconcat (accu_string, new_string, NULL);
  92   else if (new_string)
  93     result_string = g_strdup (new_string);
  94   else
  95     result_string = NULL;
  96
  97   g_value_set_string_take_ownership (return_accu, result_string);
  98
  99   return TRUE;
 100 }
 101
 102 static gchar*
 103 test_object_test_signal (TestObject *tobject,
 104                          TestIface  *iface_object,
 105                          gpointer    tdata)
 106 {
 107   g_message ("::test_signal default_handler called");
 108
 109   g_return_val_if_fail (TEST_IS_IFACE (iface_object), NULL);
 110
 111   return g_strdup ("<default_handler>");
 112 }
 113
 114 static void
 115 test_object_class_init (TestObjectClass *class)
 116 {
 117   /*  GObjectClass *gobject_class = G_OBJECT_CLASS (class); */
 118
 119   class->test_signal = test_object_test_signal;
 120
 121   g_signal_newc ("test-signal",
 122                  G_OBJECT_CLASS_TYPE (class),
 123                  G_SIGNAL_RUN_FIRST | G_SIGNAL_RUN_LAST | G_SIGNAL_RUN_CLEANUP,
 124                  G_STRUCT_OFFSET (TestObjectClass, test_signal),
 125                  test_signal_accumulator, NULL,
 126                  g_cclosure_marshal_STRING__OBJECT_POINTER,
 127                  G_TYPE_STRING, 2, TEST_TYPE_IFACE, G_TYPE_POINTER);
 128 }
 129
 130 GType
 131 test_object_get_type (void)
 132 {
 133   static GType test_object_type = 0;
 134
 135   if (!test_object_type)
 136     {
 137       static const GTypeInfo test_object_info =
 138       {
 139         sizeof (TestObjectClass),
 140         NULL,           /* base_init */
 141         NULL,           /* base_finalize */
 142         (GClassInitFunc) test_object_class_init,
 143         NULL,           /* class_finalize */
 144         NULL,           /* class_data */
 145         sizeof (TestObject),
 146         5,              /* n_preallocs */
 147         (GInstanceInitFunc) test_object_init,
 148       };
 149       GInterfaceInfo iface_info = { NULL, NULL, NULL };
 150
 151       test_object_type = g_type_register_static (G_TYPE_OBJECT, "TestObject", &test_object_info, 0);
 152       g_type_add_interface_static (test_object_type, TEST_TYPE_IFACE, &iface_info);
 153     }
 154
 155   return test_object_type;
 156 }
 157
 158
 159
 160 int
 161 main (int   argc,
 162       char *argv[])
 163 {
 164   TestObject *tobject, *sigarg;
 165   gchar *string = NULL;
 166
 167   g_log_set_always_fatal (g_log_set_always_fatal (G_LOG_FATAL_MASK) |
 168                           G_LOG_LEVEL_WARNING |
 169                           G_LOG_LEVEL_CRITICAL);
 170   g_type_init (G_TYPE_DEBUG_OBJECTS | G_TYPE_DEBUG_SIGNALS);
 171
 172   tobject = g_object_new (TEST_TYPE_OBJECT, NULL);
 173   sigarg = g_object_new (TEST_TYPE_OBJECT, NULL);
 174   g_signal_emit_by_name (tobject, "test-signal", sigarg, NULL, &string);
 175   g_message ("signal return: \"%s\"", string);
 176   g_free (string);
 177
 178   g_object_unref (sigarg);
 179   g_object_unref (tobject);
 180
 181   g_message ("%s done", argv[0]);
 182
 183   return 0;
 184 }