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-rw-r--r--lib/widgets/ephy-zoom-control.c344
1 files changed, 344 insertions, 0 deletions
diff --git a/lib/widgets/ephy-zoom-control.c b/lib/widgets/ephy-zoom-control.c
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+++ b/lib/widgets/ephy-zoom-control.c
@@ -0,0 +1,344 @@
+/*
+ * Copyright (C) 2003 Christian Persch
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "ephy-zoom-control.h"
+#include "ephy-marshal.h"
+#include "ephy-zoom.h"
+
+#include <gtk/gtk.h>
+#include <gtk/gtkmenu.h>
+#include <gtk/gtkoptionmenu.h>
+#include <bonobo/bonobo-i18n.h>
+
+/**
+ * Private data
+ */
+struct _EphyZoomControlPrivate {
+ GtkWidget *option_menu;
+ float zoom;
+ guint handler_id;
+};
+
+enum
+{
+ PROP_0,
+ PROP_ZOOM
+};
+
+enum
+{
+ ZOOM_TO_LEVEL_SIGNAL,
+ LAST_SIGNAL
+};
+
+static guint signals[LAST_SIGNAL];
+
+static GObjectClass *parent_class = NULL;
+
+static void ephy_zoom_control_class_init (EphyZoomControlClass *klass);
+static void ephy_zoom_control_init (EphyZoomControl *control);
+static void ephy_zoom_control_finalize (GObject *o);
+
+#define MENU_ID "ephy-zoom-control-menu-id"
+
+/**
+ * EphyZoomControl object
+ */
+
+GType
+ephy_zoom_control_get_type (void)
+{
+ static GType ephy_zoom_control_type = 0;
+
+ if (ephy_zoom_control_type == 0)
+ {
+ static const GTypeInfo our_info =
+ {
+ sizeof (EphyZoomControlClass),
+ NULL, /* base_init */
+ NULL, /* base_finalize */
+ (GClassInitFunc) ephy_zoom_control_class_init,
+ NULL,
+ NULL, /* class_data */
+ sizeof (EphyZoomControl),
+ 0, /* n_preallocs */
+ (GInstanceInitFunc) ephy_zoom_control_init,
+ };
+
+ ephy_zoom_control_type = g_type_register_static (EGG_TYPE_TOOL_ITEM,
+ "EphyZoomControl",
+ &our_info, 0);
+ }
+
+ return ephy_zoom_control_type;
+}
+
+static void
+proxy_menu_activate_cb (GtkMenuItem *menu_item, gpointer data)
+{
+ EphyZoomControl *control;
+ gint index;
+ float zoom;
+
+ g_return_if_fail (EPHY_IS_ZOOM_CONTROL (data));
+ control = EPHY_ZOOM_CONTROL (data);
+
+ /* 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 != control->priv->zoom)
+ {
+ g_signal_emit (control, signals[ZOOM_TO_LEVEL_SIGNAL], 0, zoom);
+ }
+}
+
+static gboolean
+ephy_zoom_control_create_menu_proxy (EggToolItem *item)
+{
+ EphyZoomControl *control = EPHY_ZOOM_CONTROL (item);
+ EphyZoomControlPrivate *p = control->priv;
+ GtkWidget *menu, *menu_item;
+ GSList *group = NULL;
+ gint i;
+
+ menu = gtk_menu_new ();
+
+ for (i = 0; i < n_zoom_levels; i++)
+ {
+ 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);
+
+ gtk_widget_show (menu_item);
+ gtk_menu_shell_append (GTK_MENU_SHELL (menu), menu_item);
+
+ 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), control, 0);
+ }
+
+ menu_item = gtk_menu_item_new_with_mnemonic (_("_Zoom"));
+ gtk_menu_item_set_submenu (GTK_MENU_ITEM (menu_item), menu);
+
+ gtk_widget_show (menu);
+ gtk_widget_show (menu_item);
+
+ g_object_ref (menu_item);
+ gtk_object_sink (GTK_OBJECT (menu_item));
+ egg_tool_item_set_proxy_menu_item (item, MENU_ID, menu_item);
+ g_object_unref (menu_item);
+
+ return TRUE;
+}
+
+static void
+option_menu_changed_cb (GtkOptionMenu *option_menu, EphyZoomControl *control)
+{
+ gint index;
+ float zoom;
+
+ index = gtk_option_menu_get_history (option_menu);
+ zoom = zoom_levels[index].level;
+
+ if (zoom != control->priv->zoom)
+ {
+ g_signal_emit (control, signals[ZOOM_TO_LEVEL_SIGNAL], 0, zoom);
+ }
+}
+
+static void
+sync_zoom_cb (EphyZoomControl *control, GParamSpec *pspec, gpointer data)
+{
+ EphyZoomControlPrivate *p = control->priv;
+ guint index;
+
+ index = ephy_zoom_get_zoom_level_index (p->zoom);
+
+ g_signal_handler_block (p->option_menu, p->handler_id);
+ gtk_option_menu_set_history (GTK_OPTION_MENU (p->option_menu), index);
+ g_signal_handler_unblock (p->option_menu, p->handler_id);
+}
+
+static void
+ephy_zoom_control_init (EphyZoomControl *control)
+{
+ EphyZoomControlPrivate *p;
+ GtkWidget *item, *menu, *box;
+ guint i;
+
+ p = g_new0 (EphyZoomControlPrivate, 1);
+ control->priv = p;
+
+ p->zoom = 1.0;
+
+ p->option_menu = gtk_option_menu_new ();
+ menu = gtk_menu_new ();
+
+ for (i = 0; i < n_zoom_levels; i++)
+ {
+ item = gtk_menu_item_new_with_label (_(zoom_levels[i].name));
+ gtk_menu_shell_append (GTK_MENU_SHELL (menu),item);
+
+ gtk_widget_show (item);
+ }
+
+ gtk_option_menu_set_menu (GTK_OPTION_MENU (p->option_menu), menu);
+ gtk_widget_show (menu);
+ gtk_widget_show (p->option_menu);
+
+ i = ephy_zoom_get_zoom_level_index (p->zoom);
+ gtk_option_menu_set_history (GTK_OPTION_MENU (p->option_menu), i);
+
+ g_object_ref (p->option_menu);
+ gtk_object_sink (GTK_OBJECT (p->option_menu));
+
+ box = gtk_vbox_new (TRUE, 0);
+ gtk_box_pack_start (GTK_BOX (box), p->option_menu, TRUE, FALSE, 0);
+ gtk_widget_show (box);
+
+ gtk_container_add (GTK_CONTAINER (control), box);
+ gtk_container_set_border_width (GTK_CONTAINER (control), 3);
+
+ p->handler_id = g_signal_connect (p->option_menu, "changed",
+ G_CALLBACK (option_menu_changed_cb), control);
+
+ g_signal_connect_object (control, "notify::zoom",
+ G_CALLBACK (sync_zoom_cb), NULL, 0);
+}
+
+static void
+ephy_zoom_control_set_property (GObject *object,
+ guint prop_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ EphyZoomControl *control;
+ EphyZoomControlPrivate *p;
+
+ control = EPHY_ZOOM_CONTROL (object);
+ p = control->priv;
+
+ switch (prop_id)
+ {
+ case PROP_ZOOM:
+ p->zoom = g_value_get_float (value);
+ g_object_notify (object, "zoom");
+ break;
+ }
+}
+
+static void
+ephy_zoom_control_get_property (GObject *object,
+ guint prop_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ EphyZoomControl *control;
+ EphyZoomControlPrivate *p;
+
+ control = EPHY_ZOOM_CONTROL (object);
+ p = control->priv;
+
+ switch (prop_id)
+ {
+ case PROP_ZOOM:
+ g_value_set_float (value, p->zoom);
+ break;
+ }
+}
+
+static void
+ephy_zoom_control_class_init (EphyZoomControlClass *klass)
+{
+ GObjectClass *object_class;
+ EggToolItemClass *tool_item_class;
+
+ parent_class = g_type_class_peek_parent (klass);
+
+ object_class = (GObjectClass *)klass;
+ tool_item_class = (EggToolItemClass *)klass;
+
+ object_class->set_property = ephy_zoom_control_set_property;
+ object_class->get_property = ephy_zoom_control_get_property;
+ object_class->finalize = ephy_zoom_control_finalize;
+
+ tool_item_class->create_menu_proxy = ephy_zoom_control_create_menu_proxy;
+
+ g_object_class_install_property (object_class,
+ PROP_ZOOM,
+ g_param_spec_float ("zoom",
+ _("Zoom"),
+ _("Zoom level to display in the item."),
+ ZOOM_MINIMAL,
+ ZOOM_MAXIMAL,
+ 1.0,
+ G_PARAM_READWRITE));
+
+ signals[ZOOM_TO_LEVEL_SIGNAL] =
+ g_signal_new ("zoom_to_level",
+ G_TYPE_FROM_CLASS (klass),
+ G_SIGNAL_RUN_LAST,
+ G_STRUCT_OFFSET (EphyZoomControlClass,
+ zoom_to_level),
+ NULL, NULL,
+ g_cclosure_marshal_VOID__FLOAT,
+ G_TYPE_NONE,
+ 1,
+ G_TYPE_FLOAT);
+}
+
+static void
+ephy_zoom_control_finalize (GObject *o)
+{
+ EphyZoomControl *control = EPHY_ZOOM_CONTROL (o);
+
+ g_object_unref (control->priv->option_menu);
+
+ g_free (control->priv);
+
+ G_OBJECT_CLASS (parent_class)->finalize (o);
+}
+
+
+void
+ephy_zoom_control_set_zoom_level (EphyZoomControl *control, float zoom)
+{
+ g_return_if_fail (EPHY_IS_ZOOM_CONTROL (control));
+
+ if (zoom < ZOOM_MINIMAL || zoom > ZOOM_MAXIMAL) return;
+
+ control->priv->zoom = zoom;
+ g_object_notify (G_OBJECT (control), "zoom");
+}
+
+float
+ephy_zoom_control_get_zoom_level (EphyZoomControl *control)
+{
+ g_return_val_if_fail (EPHY_IS_ZOOM_CONTROL (control), 1.0);
+
+ return control->priv->zoom;
+}
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