ephy-zoom-control.c

   1 /*
   2  *  Copyright (C) 2003, 2004 Christian Persch
   3  *
   4  *  Modified 2005 by James Bowes for use in evince.
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2, or (at your option)
   9  *  any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  *
  20  *  $Id$
  21  */
  22
  23 #include "config.h"
  24
  25 #include "ephy-zoom-control.h"
  26 #include "ephy-zoom.h"
  27
  28 #include <gtk/gtk.h>
  29 #include <glib/gi18n.h>
  30
  31 #define EPHY_ZOOM_CONTROL_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE ((object), EPHY_TYPE_ZOOM_CONTROL, EphyZoomControlPrivate))
  32
  33 struct _EphyZoomControlPrivate
  34 {
  35         GtkComboBox *combo;
  36         float zoom;
  37         guint handler_id;
  38 };
  39
  40 enum
  41 {
  42         COL_TEXT,
  43         COL_IS_SEP
  44 };
  45
  46 enum
  47 {
  48         PROP_0,
  49         PROP_ZOOM
  50 };
  51
  52 enum
  53 {
  54         ZOOM_TO_LEVEL_SIGNAL,
  55         LAST_SIGNAL
  56 };
  57
  58 static guint signals[LAST_SIGNAL];
  59
  60 static GObjectClass *parent_class = NULL;
  61
  62 static void     ephy_zoom_control_class_init    (EphyZoomControlClass *klass);
  63 static void     ephy_zoom_control_init          (EphyZoomControl *control);
  64 static void     ephy_zoom_control_finalize      (GObject *o);
  65
  66 GType
  67 ephy_zoom_control_get_type (void)
  68 {
  69         static GType type = 0;
  70
  71         if (G_UNLIKELY (type == 0))
  72         {
  73                 const GTypeInfo our_info =
  74                         {
  75                                 sizeof (EphyZoomControlClass),
  76                                 NULL, /* base_init */
  77                                 NULL, /* base_finalize */
  78                                 (GClassInitFunc) ephy_zoom_control_class_init,
  79                                 NULL,
  80                                 NULL, /* class_data */
  81                                 sizeof (EphyZoomControl),
  82                                 0, /* n_preallocs */
  83                                 (GInstanceInitFunc) ephy_zoom_control_init,
  84                         };
  85
  86                 type = g_type_register_static (GTK_TYPE_TOOL_ITEM,
  87                                                "EphyZoomControl",
  88                                                &our_info, 0);
  89         }
  90
  91         return type;
  92 }
  93
  94 static void
  95 combo_changed_cb (GtkComboBox *combo, EphyZoomControl *control)
  96 {
  97         gint index;
  98         float zoom;
  99
 100         index = gtk_combo_box_get_active (combo);
 101         zoom = zoom_levels[index].level;
 102
 103         if (zoom != control->priv->zoom)
 104         {
 105                 g_signal_emit (control, signals[ZOOM_TO_LEVEL_SIGNAL], 0, zoom);
 106         }
 107 }
 108
 109 static void
 110 sync_zoom_cb (EphyZoomControl *control, GParamSpec *pspec, gpointer data)
 111 {
 112         EphyZoomControlPrivate *p = control->priv;
 113         guint index;
 114
 115         index = ephy_zoom_get_zoom_level_index (p->zoom);
 116
 117         g_signal_handler_block (p->combo, p->handler_id);
 118         gtk_combo_box_set_active (p->combo, index);
 119         g_signal_handler_unblock (p->combo, p->handler_id);
 120 }
 121
 122 static gboolean
 123 row_is_separator (GtkTreeModel *model,
 124                   GtkTreeIter  *iter,
 125                   gpointer      data)
 126 {
 127         gboolean is_sep;
 128         gtk_tree_model_get (model, iter, COL_IS_SEP, &is_sep, -1);
 129         return is_sep;
 130 }
 131
 132 static void
 133 ephy_zoom_control_init (EphyZoomControl *control)
 134 {
 135         EphyZoomControlPrivate *p;
 136         GtkWidget *vbox;
 137         GtkCellRenderer *renderer;
 138         GtkListStore    *store;
 139         GtkTreeIter      iter;
 140         guint i;
 141
 142         p = EPHY_ZOOM_CONTROL_GET_PRIVATE (control);
 143         control->priv = p;
 144
 145         p->zoom = 1.0;
 146
 147         store = gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_BOOLEAN);
 148
 149         for (i = 0; i < n_zoom_levels; i++)
 150         {
 151                 gtk_list_store_append (store, &iter);
 152
 153                 if (zoom_levels[i].name != NULL) {
 154                         gtk_list_store_set (store, &iter,
 155                                             COL_TEXT, _(zoom_levels[i].name),
 156                                             -1);
 157                 } else {
 158                         gtk_list_store_set (store, &iter,
 159                                             COL_IS_SEP, zoom_levels[i].name == NULL,
 160                                             -1);
 161                 }
 162         }
 163
 164         p->combo = GTK_COMBO_BOX (gtk_combo_box_new_with_model (GTK_TREE_MODEL (store)));
 165         g_object_unref (store);
 166
 167         renderer = gtk_cell_renderer_text_new ();
 168         gtk_cell_layout_pack_start     (GTK_CELL_LAYOUT (p->combo), renderer, TRUE);
 169         gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (p->combo), renderer,
 170                                         "text", COL_TEXT, NULL);
 171         gtk_combo_box_set_row_separator_func (p->combo,
 172                                               (GtkTreeViewRowSeparatorFunc) row_is_separator,
 173                                               NULL, NULL);
 174
 175         gtk_combo_box_set_focus_on_click (p->combo, FALSE);
 176         g_object_ref_sink (G_OBJECT (p->combo));
 177         gtk_widget_show (GTK_WIDGET (p->combo));
 178
 179         i = ephy_zoom_get_zoom_level_index (p->zoom);
 180         gtk_combo_box_set_active (p->combo, i);
 181
 182         vbox = gtk_vbox_new (TRUE, 0);
 183         gtk_box_pack_start (GTK_BOX (vbox), GTK_WIDGET (p->combo), TRUE, FALSE, 0);
 184         gtk_widget_show (vbox);
 185
 186         gtk_container_add (GTK_CONTAINER (control), vbox);
 187
 188         p->handler_id = g_signal_connect (p->combo, "changed",
 189                                           G_CALLBACK (combo_changed_cb), control);
 190
 191         g_signal_connect_object (control, "notify::zoom",
 192                                  G_CALLBACK (sync_zoom_cb), NULL, 0);
 193 }
 194
 195 static void
 196 ephy_zoom_control_set_property (GObject *object,
 197                                 guint prop_id,
 198                                 const GValue *value,
 199                                 GParamSpec *pspec)
 200 {
 201         EphyZoomControl *control;
 202         EphyZoomControlPrivate *p;
 203
 204         control = EPHY_ZOOM_CONTROL (object);
 205         p = control->priv;
 206
 207         switch (prop_id)
 208         {
 209                 case PROP_ZOOM:
 210                         p->zoom = g_value_get_float (value);
 211                         break;
 212         }
 213 }
 214
 215 static void
 216 ephy_zoom_control_get_property (GObject *object,
 217                                 guint prop_id,
 218                                 GValue *value,
 219                                 GParamSpec *pspec)
 220 {
 221         EphyZoomControl *control;
 222         EphyZoomControlPrivate *p;
 223
 224         control = EPHY_ZOOM_CONTROL (object);
 225         p = control->priv;
 226
 227         switch (prop_id)
 228         {
 229                 case PROP_ZOOM:
 230                         g_value_set_float (value, p->zoom);
 231                         break;
 232         }
 233 }
 234
 235 #if !GTK_CHECK_VERSION (2, 11, 5)
 236 static void
 237 set_combo_tooltip (GtkWidget *widget,
 238                    GtkTooltipsData *data)
 239 {
 240         if (GTK_IS_BUTTON (widget))
 241         {
 242                 gtk_tooltips_set_tip (data->tooltips, widget,
 243                                       data->tip_text, data->tip_private);
 244         }
 245 }
 246
 247 static void
 248 combo_realized (GtkWidget *combo,
 249                 GtkWidget *control)
 250 {
 251         GtkTooltipsData *data;
 252
 253         data = gtk_tooltips_data_get (control);
 254         g_return_if_fail (data != NULL);
 255
 256         gtk_container_forall (GTK_CONTAINER (combo),
 257                               (GtkCallback) set_combo_tooltip, data);
 258 }
 259
 260 static gboolean
 261 ephy_zoom_control_set_tooltip (GtkToolItem *tool_item,
 262                                GtkTooltips *tooltips,
 263                                const char *tip_text,
 264                                const char *tip_private)
 265 {
 266         EphyZoomControl *control = EPHY_ZOOM_CONTROL (tool_item);
 267         GtkWidget *widget = GTK_WIDGET (tool_item);
 268
 269         /* hack to make tooltips work also on Ctrl-F1 */
 270         gtk_tooltips_set_tip (tooltips, widget, tip_text, tip_private);
 271
 272         g_signal_handlers_disconnect_by_func
 273                 (control->priv->combo, G_CALLBACK (combo_realized), widget);
 274
 275         if (GTK_WIDGET_REALIZED (tool_item))
 276         {
 277                 combo_realized (GTK_WIDGET (control->priv->combo), widget);
 278         }
 279         else
 280         {
 281                 g_signal_connect_after (control->priv->combo, "realize",
 282                                         G_CALLBACK (combo_realized), widget);
 283         }
 284
 285         return TRUE;
 286 }
 287 #endif /* !GTK_CHECK_VERSION (2, 11, 5) */
 288
 289 static void
 290 ephy_zoom_control_class_init (EphyZoomControlClass *klass)
 291 {
 292         GObjectClass *object_class;
 293         GtkToolItemClass *tool_item_class;
 294
 295         parent_class = g_type_class_peek_parent (klass);
 296
 297         object_class = (GObjectClass *)klass;
 298         tool_item_class = (GtkToolItemClass *)klass;
 299
 300         object_class->set_property = ephy_zoom_control_set_property;
 301         object_class->get_property = ephy_zoom_control_get_property;
 302         object_class->finalize = ephy_zoom_control_finalize;
 303
 304 #if !GTK_CHECK_VERSION (2, 11, 5)
 305         tool_item_class->set_tooltip = ephy_zoom_control_set_tooltip;
 306 #endif
 307
 308         g_object_class_install_property (object_class,
 309                                          PROP_ZOOM,
 310                                          g_param_spec_float ("zoom",
 311                                                              "Zoom",
 312                                                              "Zoom level to display in the item.",
 313                                                              ZOOM_MINIMAL,
 314                                                              ZOOM_MAXIMAL,
 315                                                              1.0,
 316                                                              G_PARAM_READWRITE));
 317
 318         signals[ZOOM_TO_LEVEL_SIGNAL] =
 319                 g_signal_new ("zoom_to_level",
 320                               G_TYPE_FROM_CLASS (klass),
 321                               G_SIGNAL_RUN_LAST,
 322                               G_STRUCT_OFFSET (EphyZoomControlClass,
 323                                                zoom_to_level),
 324                               NULL, NULL,
 325                               g_cclosure_marshal_VOID__FLOAT,
 326                               G_TYPE_NONE,
 327                               1,
 328                               G_TYPE_FLOAT);
 329
 330         g_type_class_add_private (object_class, sizeof (EphyZoomControlPrivate));
 331 }
 332
 333 static void
 334 ephy_zoom_control_finalize (GObject *o)
 335 {
 336         EphyZoomControl *control = EPHY_ZOOM_CONTROL (o);
 337
 338         g_object_unref (control->priv->combo);
 339
 340         G_OBJECT_CLASS (parent_class)->finalize (o);
 341 }
 342
 343 void
 344 ephy_zoom_control_set_zoom_level (EphyZoomControl *control, float zoom)
 345 {
 346         g_return_if_fail (EPHY_IS_ZOOM_CONTROL (control));
 347
 348         if (zoom < ZOOM_MINIMAL || zoom > ZOOM_MAXIMAL) return;
 349
 350         control->priv->zoom = zoom;
 351         g_object_notify (G_OBJECT (control), "zoom");
 352 }
 353
 354 float
 355 ephy_zoom_control_get_zoom_level (EphyZoomControl *control)
 356 {
 357         g_return_val_if_fail (EPHY_IS_ZOOM_CONTROL (control), 1.0);
 358
 359         return control->priv->zoom;
 360 }