Pileus Git - ~andy/gtk/blob - modules/other/gail/gailspinbutton.c

   1 /* GAIL - The GNOME Accessibility Implementation Library
   2  * Copyright 2001, 2002, 2003 Sun Microsystems 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 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 #include "config.h"
  21
  22 #include <string.h>
  23 #include <gtk/gtk.h>
  24 #include "gailspinbutton.h"
  25 #include "gailadjustment.h"
  26 #include "gail-private-macros.h"
  27
  28 static void      gail_spin_button_class_init        (GailSpinButtonClass *klass);
  29 static void      gail_spin_button_init              (GailSpinButton *button);
  30 static void      gail_spin_button_real_initialize   (AtkObject      *obj,
  31                                                      gpointer       data);
  32 static void      gail_spin_button_finalize          (GObject        *object);
  33
  34 static void      atk_value_interface_init           (AtkValueIface  *iface);
  35
  36 static void      gail_spin_button_real_notify_gtk   (GObject        *obj,
  37                                                      GParamSpec     *pspec);
  38
  39 static void      gail_spin_button_get_current_value (AtkValue       *obj,
  40                                                      GValue         *value);
  41 static void      gail_spin_button_get_maximum_value (AtkValue       *obj,
  42                                                      GValue         *value);
  43 static void      gail_spin_button_get_minimum_value (AtkValue       *obj,
  44                                                      GValue         *value);
  45 static void      gail_spin_button_get_minimum_increment (AtkValue       *obj,
  46                                                          GValue         *value);
  47 static gboolean  gail_spin_button_set_current_value (AtkValue       *obj,
  48                                                      const GValue   *value);
  49 static void      gail_spin_button_value_changed     (GtkAdjustment  *adjustment,
  50                                                      gpointer       data);
  51
  52 G_DEFINE_TYPE_WITH_CODE (GailSpinButton, gail_spin_button, GAIL_TYPE_ENTRY,
  53                          G_IMPLEMENT_INTERFACE (ATK_TYPE_VALUE, atk_value_interface_init))
  54
  55 static void
  56 gail_spin_button_class_init (GailSpinButtonClass *klass)
  57 {
  58   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
  59   AtkObjectClass *class = ATK_OBJECT_CLASS (klass);
  60   GailWidgetClass *widget_class;
  61
  62   widget_class = (GailWidgetClass*)klass;
  63
  64   widget_class->notify_gtk = gail_spin_button_real_notify_gtk;
  65
  66   class->initialize = gail_spin_button_real_initialize;
  67
  68   gobject_class->finalize = gail_spin_button_finalize;
  69 }
  70
  71 static void
  72 gail_spin_button_init (GailSpinButton *button)
  73 {
  74 }
  75
  76 static void
  77 gail_spin_button_real_initialize (AtkObject *obj,
  78                                   gpointer  data)
  79 {
  80   GtkAdjustment *adjustment;
  81   GailSpinButton *spin_button = GAIL_SPIN_BUTTON (obj);
  82   GtkSpinButton *gtk_spin_button;
  83
  84   ATK_OBJECT_CLASS (gail_spin_button_parent_class)->initialize (obj, data);
  85
  86   gtk_spin_button = GTK_SPIN_BUTTON (data);
  87   /*
  88    * If a GtkAdjustment already exists for the spin_button,
  89    * create the GailAdjustment
  90    */
  91   adjustment = gtk_spin_button_get_adjustment (gtk_spin_button);
  92   if (adjustment)
  93     {
  94       spin_button->adjustment = gail_adjustment_new (adjustment);
  95       g_signal_connect (adjustment,
  96                         "value-changed",
  97                         G_CALLBACK (gail_spin_button_value_changed),
  98                         obj);
  99     }
 100   else
 101     spin_button->adjustment = NULL;
 102
 103   obj->role = ATK_ROLE_SPIN_BUTTON;
 104
 105 }
 106
 107 static void
 108 atk_value_interface_init (AtkValueIface *iface)
 109 {
 110   iface->get_current_value = gail_spin_button_get_current_value;
 111   iface->get_maximum_value = gail_spin_button_get_maximum_value;
 112   iface->get_minimum_value = gail_spin_button_get_minimum_value;
 113   iface->get_minimum_increment = gail_spin_button_get_minimum_increment;
 114   iface->set_current_value = gail_spin_button_set_current_value;
 115 }
 116
 117 static void
 118 gail_spin_button_get_current_value (AtkValue       *obj,
 119                                     GValue         *value)
 120 {
 121   GailSpinButton *spin_button;
 122
 123   g_return_if_fail (GAIL_IS_SPIN_BUTTON (obj));
 124
 125   spin_button = GAIL_SPIN_BUTTON (obj);
 126   if (spin_button->adjustment == NULL)
 127     /*
 128      * Adjustment has not been specified
 129      */
 130     return;
 131
 132   atk_value_get_current_value (ATK_VALUE (spin_button->adjustment), value);
 133 }
 134
 135 static void
 136 gail_spin_button_get_maximum_value (AtkValue       *obj,
 137                                     GValue         *value)
 138 {
 139   GailSpinButton *spin_button;
 140
 141   g_return_if_fail (GAIL_IS_SPIN_BUTTON (obj));
 142
 143   spin_button = GAIL_SPIN_BUTTON (obj);
 144   if (spin_button->adjustment == NULL)
 145     /*
 146      * Adjustment has not been specified
 147      */
 148     return;
 149
 150   atk_value_get_maximum_value (ATK_VALUE (spin_button->adjustment), value);
 151 }
 152
 153 static void
 154 gail_spin_button_get_minimum_value (AtkValue       *obj,
 155                                     GValue         *value)
 156 {
 157  GailSpinButton *spin_button;
 158
 159   g_return_if_fail (GAIL_IS_SPIN_BUTTON (obj));
 160
 161   spin_button = GAIL_SPIN_BUTTON (obj);
 162   if (spin_button->adjustment == NULL)
 163     /*
 164      * Adjustment has not been specified
 165      */
 166     return;
 167
 168   atk_value_get_minimum_value (ATK_VALUE (spin_button->adjustment), value);
 169 }
 170
 171 static void
 172 gail_spin_button_get_minimum_increment (AtkValue *obj, GValue *value)
 173 {
 174  GailSpinButton *spin_button;
 175
 176   g_return_if_fail (GAIL_IS_SPIN_BUTTON (obj));
 177
 178   spin_button = GAIL_SPIN_BUTTON (obj);
 179   if (spin_button->adjustment == NULL)
 180     /*
 181      * Adjustment has not been specified
 182      */
 183     return;
 184
 185   atk_value_get_minimum_increment (ATK_VALUE (spin_button->adjustment), value);
 186 }
 187
 188 static gboolean
 189 gail_spin_button_set_current_value (AtkValue       *obj,
 190                                     const GValue   *value)
 191 {
 192  GailSpinButton *spin_button;
 193
 194   g_return_val_if_fail (GAIL_IS_SPIN_BUTTON (obj), FALSE);
 195
 196   spin_button = GAIL_SPIN_BUTTON (obj);
 197   if (spin_button->adjustment == NULL)
 198     /*
 199      * Adjustment has not been specified
 200      */
 201     return FALSE;
 202
 203   return atk_value_set_current_value (ATK_VALUE (spin_button->adjustment), value);
 204 }
 205
 206 static void
 207 gail_spin_button_finalize (GObject            *object)
 208 {
 209   GailSpinButton *spin_button = GAIL_SPIN_BUTTON (object);
 210
 211   if (spin_button->adjustment)
 212     {
 213       g_object_unref (spin_button->adjustment);
 214       spin_button->adjustment = NULL;
 215     }
 216   G_OBJECT_CLASS (gail_spin_button_parent_class)->finalize (object);
 217 }
 218
 219
 220 static void
 221 gail_spin_button_real_notify_gtk (GObject    *obj,
 222                                   GParamSpec *pspec)
 223 {
 224   GtkWidget *widget = GTK_WIDGET (obj);
 225   GailSpinButton *spin_button = GAIL_SPIN_BUTTON (gtk_widget_get_accessible (widget));
 226
 227   if (strcmp (pspec->name, "adjustment") == 0)
 228     {
 229       /*
 230        * Get rid of the GailAdjustment for the GtkAdjustment
 231        * which was associated with the spin_button.
 232        */
 233       GtkAdjustment* adjustment;
 234       GtkSpinButton* gtk_spin_button;
 235
 236       if (spin_button->adjustment)
 237         {
 238           g_object_unref (spin_button->adjustment);
 239           spin_button->adjustment = NULL;
 240         }
 241       /*
 242        * Create the GailAdjustment when notify for "adjustment" property
 243        * is received
 244        */
 245       gtk_spin_button = GTK_SPIN_BUTTON (widget);
 246       adjustment = gtk_spin_button_get_adjustment (gtk_spin_button);
 247       spin_button->adjustment = gail_adjustment_new (adjustment);
 248       g_signal_connect (adjustment,
 249                         "value-changed",
 250                         G_CALLBACK (gail_spin_button_value_changed),
 251                         spin_button);
 252     }
 253   else
 254     GAIL_WIDGET_CLASS (gail_spin_button_parent_class)->notify_gtk (obj, pspec);
 255 }
 256
 257
 258 static void
 259 gail_spin_button_value_changed (GtkAdjustment    *adjustment,
 260                                 gpointer         data)
 261 {
 262   GailSpinButton *spin_button;
 263
 264   gail_return_if_fail (adjustment != NULL);
 265   gail_return_if_fail (data != NULL);
 266
 267   spin_button = GAIL_SPIN_BUTTON (data);
 268
 269   g_object_notify (G_OBJECT (spin_button), "accessible-value");
 270 }
 271