Pileus Git - ~andy/gtk/blob - gtk/gtktreesortable.c

   1 /* gtktreesortable.c
   2  * Copyright (C) 2000  Red Hat, Inc.,  Jonathan Blandford <jrb@redhat.com>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Library 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  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public
  15  * 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
  20
  21 #include "gtktreesortable.h"
  22 #include "gtksignal.h"
  23
  24 static void gtk_tree_sortable_base_init (gpointer g_class);
  25
  26 GtkType
  27 gtk_tree_sortable_get_type (void)
  28 {
  29   static GtkType tree_sortable_type = 0;
  30
  31   if (! tree_sortable_type)
  32     {
  33       static const GTypeInfo tree_sortable_info =
  34       {
  35         sizeof (GtkTreeSortableIface), /* class_size */
  36         gtk_tree_sortable_base_init,   /* base_init */
  37         NULL,           /* base_finalize */
  38         NULL,
  39         NULL,           /* class_finalize */
  40         NULL,           /* class_data */
  41         0,
  42         0,
  43         NULL
  44       };
  45       tree_sortable_type = g_type_register_static (G_TYPE_INTERFACE, "GtkTreeSortable", &tree_sortable_info, 0);
  46       g_type_interface_add_prerequisite (tree_sortable_type, G_TYPE_OBJECT);
  47     }
  48
  49   return tree_sortable_type;
  50 }
  51
  52 static void
  53 gtk_tree_sortable_base_init (gpointer g_class)
  54 {
  55   static gboolean initialized = FALSE;
  56
  57   if (! initialized)
  58     {
  59       g_signal_new ("sort_column_changed",
  60                     GTK_TYPE_TREE_SORTABLE,
  61                     G_SIGNAL_RUN_LAST,
  62                     G_STRUCT_OFFSET (GtkTreeSortableIface, sort_column_changed),
  63                     NULL, NULL,
  64                     gtk_marshal_VOID__VOID,
  65                     G_TYPE_NONE, 0);
  66       initialized = TRUE;
  67     }
  68 }
  69
  70 void
  71 gtk_tree_sortable_sort_column_changed (GtkTreeSortable *sortable)
  72 {
  73   g_return_if_fail (GTK_IS_TREE_SORTABLE (sortable));
  74
  75   g_signal_emit_by_name (G_OBJECT (sortable),
  76                          "sort_column_changed");
  77 }
  78
  79 gboolean
  80 gtk_tree_sortable_get_sort_column_id (GtkTreeSortable  *sortable,
  81                                       gint             *sort_column_id,
  82                                       GtkTreeSortOrder *order)
  83 {
  84   GtkTreeSortableIface *iface;
  85
  86   g_return_val_if_fail (GTK_IS_TREE_SORTABLE (sortable), FALSE);
  87
  88   iface = GTK_TREE_SORTABLE_GET_IFACE (sortable);
  89
  90   g_return_val_if_fail (iface != NULL, FALSE);
  91   g_return_val_if_fail (iface->get_sort_column_id != NULL, FALSE);
  92
  93   return (* iface->get_sort_column_id) (sortable, sort_column_id, order);
  94 }
  95
  96 void
  97 gtk_tree_sortable_set_sort_column_id (GtkTreeSortable  *sortable,
  98                                       gint              sort_column_id,
  99                                       GtkTreeSortOrder  order)
 100 {
 101   GtkTreeSortableIface *iface;
 102
 103   g_return_if_fail (GTK_IS_TREE_SORTABLE (sortable));
 104
 105   iface = GTK_TREE_SORTABLE_GET_IFACE (sortable);
 106
 107   g_return_if_fail (iface != NULL);
 108   g_return_if_fail (iface->set_sort_column_id != NULL);
 109
 110   (* iface->set_sort_column_id) (sortable, sort_column_id, order);
 111
 112 }
 113
 114 void
 115 gtk_tree_sortable_set_sort_func (GtkTreeSortable        *sortable,
 116                                  gint                    sort_column_id,
 117                                  GtkTreeIterCompareFunc  func,
 118                                  gpointer                data,
 119                                  GtkDestroyNotify        destroy)
 120 {
 121   GtkTreeSortableIface *iface;
 122
 123   g_return_if_fail (GTK_IS_TREE_SORTABLE (sortable));
 124
 125   iface = GTK_TREE_SORTABLE_GET_IFACE (sortable);
 126
 127   g_return_if_fail (iface != NULL);
 128   g_return_if_fail (iface->set_sort_func != NULL);
 129
 130   (* iface->set_sort_func) (sortable, sort_column_id, func, data, destroy);
 131 }
 132
 133