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-rw-r--r--cut-n-paste/zoom-control/ephy-zoom-action.c336
1 files changed, 336 insertions, 0 deletions
diff --git a/cut-n-paste/zoom-control/ephy-zoom-action.c b/cut-n-paste/zoom-control/ephy-zoom-action.c
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+/*
+ * Copyright (C) 2003 Marco Pesenti Gritti
+ * Copyright (C) 2003, 2004 Christian Persch
+ *
+ * Modified 2005 by James Bowes for use in evince.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $Id$
+ */
+
+#include "config.h"
+
+#include "ephy-zoom-action.h"
+#include "ephy-zoom-control.h"
+#include "ephy-zoom.h"
+
+#include <glib-object.h>
+#include <glib/gi18n.h>
+#include <gtk/gtk.h>
+
+#define EPHY_ZOOM_ACTION_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE ((object), EPHY_TYPE_ZOOM_ACTION, EphyZoomActionPrivate))
+
+struct _EphyZoomActionPrivate
+{
+ float zoom;
+ float min_zoom;
+ float max_zoom;
+};
+
+enum
+{
+ PROP_0,
+ PROP_ZOOM,
+ PROP_MIN_ZOOM,
+ PROP_MAX_ZOOM
+};
+
+
+static void ephy_zoom_action_init (EphyZoomAction *action);
+static void ephy_zoom_action_class_init (EphyZoomActionClass *class);
+
+enum
+{
+ ZOOM_TO_LEVEL_SIGNAL,
+ LAST_SIGNAL
+};
+
+static guint signals[LAST_SIGNAL] = { 0 };
+
+G_DEFINE_TYPE (EphyZoomAction, ephy_zoom_action, GTK_TYPE_ACTION)
+
+static void
+zoom_to_level_cb (EphyZoomControl *control,
+ float zoom,
+ EphyZoomAction *action)
+{
+ g_signal_emit (action, signals[ZOOM_TO_LEVEL_SIGNAL], 0, zoom);
+}
+
+static void
+sync_zoom_cb (GtkAction *action, GParamSpec *pspec, GtkWidget *proxy)
+{
+ EphyZoomAction *zoom_action = EPHY_ZOOM_ACTION (action);
+
+ g_object_set (G_OBJECT (proxy), "zoom", zoom_action->priv->zoom, NULL);
+}
+
+static void
+sync_min_zoom_cb (GtkAction *action, GParamSpec *pspec, GtkWidget *proxy)
+{
+ EphyZoomAction *zoom_action = EPHY_ZOOM_ACTION (action);
+
+ g_object_set (G_OBJECT (proxy), "min-zoom", zoom_action->priv->min_zoom, NULL);
+}
+
+static void
+sync_max_zoom_cb (GtkAction *action, GParamSpec *pspec, GtkWidget *proxy)
+{
+ EphyZoomAction *zoom_action = EPHY_ZOOM_ACTION (action);
+
+ g_object_set (G_OBJECT (proxy), "max-zoom", zoom_action->priv->max_zoom, NULL);
+}
+
+static void
+connect_proxy (GtkAction *action, GtkWidget *proxy)
+{
+ if (EPHY_IS_ZOOM_CONTROL (proxy))
+ {
+ g_signal_connect_object (action, "notify::zoom",
+ G_CALLBACK (sync_zoom_cb), proxy, 0);
+ g_signal_connect_object (action, "notify::min-zoom",
+ G_CALLBACK (sync_min_zoom_cb), proxy, 0);
+ g_signal_connect_object (action, "notify::max-zoom",
+ G_CALLBACK (sync_max_zoom_cb), proxy, 0);
+ g_signal_connect (proxy, "zoom_to_level",
+ G_CALLBACK (zoom_to_level_cb), action);
+ }
+
+ GTK_ACTION_CLASS (ephy_zoom_action_parent_class)->connect_proxy (action, proxy);
+}
+
+static void
+proxy_menu_activate_cb (GtkMenuItem *menu_item, EphyZoomAction *action)
+{
+ gint index;
+ float zoom;
+
+ /* menu item was toggled OFF */
+ if (!gtk_check_menu_item_get_active (GTK_CHECK_MENU_ITEM (menu_item))) return;
+
+ index = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (menu_item), "zoom-level"));
+ zoom = zoom_levels[index].level;
+
+ if (zoom != action->priv->zoom)
+ {
+ g_signal_emit (action, signals[ZOOM_TO_LEVEL_SIGNAL], 0, zoom);
+ }
+}
+
+static GtkWidget *
+create_menu_item (GtkAction *action)
+{
+ EphyZoomActionPrivate *p = EPHY_ZOOM_ACTION (action)->priv;
+ GtkWidget *menu, *menu_item;
+ GSList *group = NULL;
+ int i;
+
+ menu = gtk_menu_new ();
+
+ for (i = 0; i < n_zoom_levels; i++)
+ {
+ if (zoom_levels[i].level == EPHY_ZOOM_SEPARATOR)
+ {
+ menu_item = gtk_separator_menu_item_new ();
+ }
+ else
+ {
+ menu_item = gtk_radio_menu_item_new_with_label (group,
+ _(zoom_levels[i].name));
+ group = gtk_radio_menu_item_get_group (GTK_RADIO_MENU_ITEM (menu_item));
+
+ gtk_check_menu_item_set_active (GTK_CHECK_MENU_ITEM (menu_item),
+ p->zoom == zoom_levels[i].level);
+
+ g_object_set_data (G_OBJECT (menu_item), "zoom-level", GINT_TO_POINTER (i));
+ g_signal_connect_object (G_OBJECT (menu_item), "activate",
+ G_CALLBACK (proxy_menu_activate_cb), action, 0);
+ }
+
+ gtk_widget_show (menu_item);
+ gtk_menu_shell_append (GTK_MENU_SHELL (menu), menu_item);
+ }
+
+ gtk_widget_show (menu);
+
+ menu_item = GTK_ACTION_CLASS (ephy_zoom_action_parent_class)->create_menu_item (action);
+
+ gtk_menu_item_set_submenu (GTK_MENU_ITEM (menu_item), menu);
+
+ gtk_widget_show (menu_item);
+
+ return menu_item;
+}
+
+static void
+ephy_zoom_action_set_property (GObject *object,
+ guint prop_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ EphyZoomAction *action;
+
+ action = EPHY_ZOOM_ACTION (object);
+
+ switch (prop_id)
+ {
+ case PROP_ZOOM:
+ action->priv->zoom = g_value_get_float (value);
+ break;
+ case PROP_MIN_ZOOM:
+ action->priv->min_zoom = g_value_get_float (value);
+ break;
+ case PROP_MAX_ZOOM:
+ action->priv->max_zoom = g_value_get_float (value);
+ break;
+ }
+}
+
+static void
+ephy_zoom_action_get_property (GObject *object,
+ guint prop_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ EphyZoomAction *action;
+
+ action = EPHY_ZOOM_ACTION (object);
+
+ switch (prop_id)
+ {
+ case PROP_ZOOM:
+ g_value_set_float (value, action->priv->zoom);
+ break;
+ case PROP_MIN_ZOOM:
+ g_value_set_float (value, action->priv->min_zoom);
+ break;
+ case PROP_MAX_ZOOM:
+ g_value_set_float (value, action->priv->max_zoom);
+ break;
+ }
+}
+
+static void
+ephy_zoom_action_class_init (EphyZoomActionClass *class)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (class);
+ GtkActionClass *action_class = GTK_ACTION_CLASS (class);
+
+ object_class->set_property = ephy_zoom_action_set_property;
+ object_class->get_property = ephy_zoom_action_get_property;
+
+ action_class->toolbar_item_type = EPHY_TYPE_ZOOM_CONTROL;
+ action_class->connect_proxy = connect_proxy;
+ action_class->create_menu_item = create_menu_item;
+
+ g_object_class_install_property (object_class,
+ PROP_ZOOM,
+ g_param_spec_float ("zoom",
+ "Zoom",
+ "Zoom",
+ ZOOM_MINIMAL,
+ ZOOM_MAXIMAL,
+ 1.0,
+ G_PARAM_READWRITE));
+ g_object_class_install_property (object_class,
+ PROP_MIN_ZOOM,
+ g_param_spec_float ("min-zoom",
+ "MinZoom",
+ "The minimum zoom",
+ ZOOM_MINIMAL,
+ ZOOM_MAXIMAL,
+ ZOOM_MINIMAL,
+ G_PARAM_READWRITE));
+ g_object_class_install_property (object_class,
+ PROP_MAX_ZOOM,
+ g_param_spec_float ("max-zoom",
+ "MaxZoom",
+ "The maximum zoom",
+ ZOOM_MINIMAL,
+ ZOOM_MAXIMAL,
+ ZOOM_MAXIMAL,
+ G_PARAM_READWRITE));
+
+ signals[ZOOM_TO_LEVEL_SIGNAL] =
+ g_signal_new ("zoom_to_level",
+ G_OBJECT_CLASS_TYPE (object_class),
+ G_SIGNAL_RUN_FIRST,
+ G_STRUCT_OFFSET (EphyZoomActionClass, zoom_to_level),
+ NULL, NULL,
+ g_cclosure_marshal_VOID__FLOAT,
+ G_TYPE_NONE,
+ 1,
+ G_TYPE_FLOAT);
+
+ g_type_class_add_private (object_class, sizeof (EphyZoomActionPrivate));
+}
+
+static void
+ephy_zoom_action_init (EphyZoomAction *action)
+{
+ action->priv = EPHY_ZOOM_ACTION_GET_PRIVATE (action);
+
+ action->priv->zoom = 1.0;
+}
+
+void
+ephy_zoom_action_set_zoom_level (EphyZoomAction *action, float zoom)
+{
+ g_return_if_fail (EPHY_IS_ZOOM_ACTION (action));
+
+ if (zoom < ZOOM_MINIMAL || zoom > ZOOM_MAXIMAL) return;
+
+ action->priv->zoom = zoom;
+ g_object_notify (G_OBJECT (action), "zoom");
+}
+
+float
+ephy_zoom_action_get_zoom_level (EphyZoomAction *action)
+{
+ g_return_val_if_fail (EPHY_IS_ZOOM_ACTION (action), 1.0);
+
+ return action->priv->zoom;
+}
+
+void
+ephy_zoom_action_set_min_zoom_level (EphyZoomAction *action,
+ float zoom)
+{
+ g_return_if_fail (EPHY_IS_ZOOM_ACTION (action));
+
+ if (zoom < ZOOM_MINIMAL || zoom > ZOOM_MAXIMAL) return;
+
+ action->priv->min_zoom = zoom;
+ if (action->priv->zoom > 0 && action->priv->zoom < zoom)
+ ephy_zoom_action_set_zoom_level (action, zoom);
+
+ g_object_notify (G_OBJECT (action), "min-zoom");
+}
+
+void
+ephy_zoom_action_set_max_zoom_level (EphyZoomAction *action,
+ float zoom)
+{
+ g_return_if_fail (EPHY_IS_ZOOM_ACTION (action));
+
+ if (zoom < ZOOM_MINIMAL || zoom > ZOOM_MAXIMAL) return;
+
+ action->priv->max_zoom = zoom;
+ if (action->priv->zoom > 0 && action->priv->zoom > zoom)
+ ephy_zoom_action_set_zoom_level (action, zoom);
+
+ g_object_notify (G_OBJECT (action), "max-zoom");
+}
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