lib/widgets/ephy-zoom-action.c

   1 /*
   2  *  Copyright © 2003 Marco Pesenti Gritti
   3  *  Copyright © 2003, 2004 Christian Persch
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2, or (at your option)
   8  *  any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  *
  19  *  $Id: ephy-zoom-action.c 6952 2007-03-11 19:42:02Z chpe $
  20  */
  21
  22 #include "config.h"
  23
  24 #include "ephy-zoom-action.h"
  25 #include "ephy-zoom-control.h"
  26 #include "ephy-zoom.h"
  27
  28 #include <glib-object.h>
  29 #include <glib/gi18n.h>
  30 #include <gtk/gtkmenu.h>
  31 #include <gtk/gtkmenuitem.h>
  32 #include <gtk/gtkcheckmenuitem.h>
  33 #include <gtk/gtkradiomenuitem.h>
  34
  35 #define EPHY_ZOOM_ACTION_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE ((object), EPHY_TYPE_ZOOM_ACTION, EphyZoomActionPrivate))
  36
  37 struct _EphyZoomActionPrivate
  38 {
  39         float zoom;
  40 };
  41
  42 enum
  43 {
  44         PROP_0,
  45         PROP_ZOOM
  46 };
  47
  48
  49 static void ephy_zoom_action_init       (EphyZoomAction *action);
  50 static void ephy_zoom_action_class_init (EphyZoomActionClass *class);
  51
  52 enum
  53 {
  54         ZOOM_TO_LEVEL_SIGNAL,
  55         LAST_SIGNAL
  56 };
  57
  58 static guint signals[LAST_SIGNAL] = { 0 };
  59
  60 static GObjectClass *parent_class = NULL;
  61
  62 GType
  63 ephy_zoom_action_get_type (void)
  64 {
  65         static GType type = 0;
  66
  67         if (G_UNLIKELY (type == 0))
  68         {
  69                 const GTypeInfo our_info =
  70                         {
  71                                 sizeof (EphyZoomActionClass),
  72                                 NULL, /* base_init */
  73                                 NULL, /* base_finalize */
  74                                 (GClassInitFunc) ephy_zoom_action_class_init,
  75                                 NULL,
  76                                 NULL, /* class_data */
  77                                 sizeof (EphyZoomAction),
  78                                 0, /* n_preallocs */
  79                                 (GInstanceInitFunc) ephy_zoom_action_init,
  80                         };
  81
  82                 type = g_type_register_static (GTK_TYPE_ACTION,
  83                                                "EphyZoomAction",
  84                                                &our_info, 0);
  85         }
  86
  87         return type;
  88 }
  89
  90 static void
  91 zoom_to_level_cb (EphyZoomControl *control,
  92                   float zoom,
  93                   EphyZoomAction *action)
  94 {
  95         g_signal_emit (action, signals[ZOOM_TO_LEVEL_SIGNAL], 0, zoom);
  96 }
  97
  98 static void
  99 sync_zoom_cb (GtkAction *action, GParamSpec *pspec, GtkWidget *proxy)
 100 {
 101         EphyZoomAction *zoom_action = EPHY_ZOOM_ACTION (action);
 102
 103         g_object_set (G_OBJECT (proxy), "zoom", zoom_action->priv->zoom, NULL);
 104 }
 105
 106 static void
 107 connect_proxy (GtkAction *action, GtkWidget *proxy)
 108 {
 109         if (EPHY_IS_ZOOM_CONTROL (proxy))
 110         {
 111                 g_signal_connect_object (action, "notify::zoom",
 112                                          G_CALLBACK (sync_zoom_cb), proxy, 0);
 113
 114                 g_signal_connect (proxy, "zoom_to_level",
 115                                   G_CALLBACK (zoom_to_level_cb), action);
 116         }
 117
 118         GTK_ACTION_CLASS (parent_class)->connect_proxy (action, proxy);
 119 }
 120
 121 static void
 122 proxy_menu_activate_cb (GtkMenuItem *menu_item, EphyZoomAction *action)
 123 {
 124         gint index;
 125         float zoom;
 126
 127         /* menu item was toggled OFF */
 128         if (!gtk_check_menu_item_get_active (GTK_CHECK_MENU_ITEM (menu_item))) return;
 129
 130         index = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (menu_item), "zoom-level"));
 131         zoom = zoom_levels[index].level;
 132
 133         if (zoom != action->priv->zoom)
 134         {
 135                 g_signal_emit (action, signals[ZOOM_TO_LEVEL_SIGNAL], 0, zoom);
 136         }
 137 }
 138
 139 static GtkWidget *
 140 create_menu_item (GtkAction *action)
 141 {
 142         EphyZoomActionPrivate *p = EPHY_ZOOM_ACTION (action)->priv;
 143         GtkWidget *menu, *menu_item;
 144         GSList *group = NULL;
 145         int i;
 146
 147         menu = gtk_menu_new ();
 148
 149         for (i = 0; i < n_zoom_levels; i++)
 150         {
 151                 menu_item = gtk_radio_menu_item_new_with_label (group, _(zoom_levels[i].name));
 152                 group = gtk_radio_menu_item_get_group (GTK_RADIO_MENU_ITEM (menu_item));
 153
 154                 gtk_check_menu_item_set_active (GTK_CHECK_MENU_ITEM (menu_item),
 155                                                 p->zoom == zoom_levels[i].level);
 156
 157                 gtk_widget_show (menu_item);
 158                 gtk_menu_shell_append (GTK_MENU_SHELL (menu), menu_item);
 159
 160                 g_object_set_data (G_OBJECT (menu_item), "zoom-level", GINT_TO_POINTER (i));
 161                 g_signal_connect_object (G_OBJECT (menu_item), "activate",
 162                                          G_CALLBACK (proxy_menu_activate_cb), action, 0);
 163         }
 164
 165         gtk_widget_show (menu);
 166
 167         menu_item = GTK_ACTION_CLASS (parent_class)->create_menu_item (action);
 168
 169         gtk_menu_item_set_submenu (GTK_MENU_ITEM (menu_item), menu);
 170
 171         gtk_widget_show (menu_item);
 172
 173         return menu_item;
 174 }
 175
 176 static void
 177 ephy_zoom_action_set_property (GObject *object,
 178                                guint prop_id,
 179                                const GValue *value,
 180                                GParamSpec *pspec)
 181 {
 182         EphyZoomAction *action;
 183
 184         action = EPHY_ZOOM_ACTION (object);
 185
 186         switch (prop_id)
 187         {
 188                 case PROP_ZOOM:
 189                         action->priv->zoom = g_value_get_float (value);
 190                         break;
 191         }
 192 }
 193
 194 static void
 195 ephy_zoom_action_get_property (GObject *object,
 196                                guint prop_id,
 197                                GValue *value,
 198                                GParamSpec *pspec)
 199 {
 200         EphyZoomAction *action;
 201
 202         action = EPHY_ZOOM_ACTION (object);
 203
 204         switch (prop_id)
 205         {
 206                 case PROP_ZOOM:
 207                         g_value_set_float (value, action->priv->zoom);
 208                         break;
 209         }
 210 }
 211
 212 static void
 213 ephy_zoom_action_class_init (EphyZoomActionClass *class)
 214 {
 215         GObjectClass *object_class = G_OBJECT_CLASS (class);
 216         GtkActionClass *action_class = GTK_ACTION_CLASS (class);
 217
 218         object_class->set_property = ephy_zoom_action_set_property;
 219         object_class->get_property = ephy_zoom_action_get_property;
 220
 221         parent_class = g_type_class_peek_parent (class);
 222
 223         action_class->toolbar_item_type = EPHY_TYPE_ZOOM_CONTROL;
 224         action_class->connect_proxy = connect_proxy;
 225         action_class->create_menu_item = create_menu_item;
 226
 227         g_object_class_install_property (object_class,
 228                                          PROP_ZOOM,
 229                                          g_param_spec_float ("zoom",
 230                                                              "Zoom",
 231                                                              "Zoom",
 232                                                              ZOOM_MINIMAL,
 233                                                              ZOOM_MAXIMAL,
 234                                                              1.0,
 235                                                              G_PARAM_READWRITE | G_PARAM_STATIC_NAME | G_PARAM_STATIC_NICK | G_PARAM_STATIC_BLURB));
 236
 237         signals[ZOOM_TO_LEVEL_SIGNAL] =
 238                 g_signal_new ("zoom_to_level",
 239                               G_OBJECT_CLASS_TYPE (object_class),
 240                               G_SIGNAL_RUN_FIRST,
 241                               G_STRUCT_OFFSET (EphyZoomActionClass, zoom_to_level),
 242                               NULL, NULL,
 243                               g_cclosure_marshal_VOID__FLOAT,
 244                               G_TYPE_NONE,
 245                               1,
 246                               G_TYPE_FLOAT);
 247
 248         g_type_class_add_private (object_class, sizeof (EphyZoomActionPrivate));
 249 }
 250
 251 static void
 252 ephy_zoom_action_init (EphyZoomAction *action)
 253 {
 254         action->priv = EPHY_ZOOM_ACTION_GET_PRIVATE (action);
 255
 256         action->priv->zoom = 1.0;
 257 }
 258
 259 void
 260 ephy_zoom_action_set_zoom_level (EphyZoomAction *action, float zoom)
 261 {
 262         g_return_if_fail (EPHY_IS_ZOOM_ACTION (action));
 263
 264         if (zoom < ZOOM_MINIMAL || zoom > ZOOM_MAXIMAL) return;
 265
 266         action->priv->zoom = zoom;
 267         g_object_notify (G_OBJECT (action), "zoom");
 268 }
 269
 270 float
 271 ephy_zoom_action_get_zoom_level (EphyZoomAction *action)
 272 {
 273         g_return_val_if_fail (EPHY_IS_ZOOM_ACTION (action), 1.0);
 274
 275         return action->priv->zoom;
 276 }