path: root/lib/widgets/ephy-zoom-action.c

/*
 *  Copyright (C) 2003 Marco Pesenti Gritti
 *  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-action.h"
#include "ephy-zoom-control.h"
#include "ephy-zoom.h"

#include <glib-object.h>
#include <bonobo/bonobo-i18n.h>

struct _EphyZoomActionPrivate {
    float zoom;
};

enum
{
    PROP_0,
    PROP_ZOOM
};


static void ephy_zoom_action_init       (EphyZoomAction *action);
static void ephy_zoom_action_class_init (EphyZoomActionClass *class);
static void ephy_zoom_action_finalize   (GObject *object);

enum
{
    ZOOM_TO_LEVEL_SIGNAL,
    LAST_SIGNAL
};

static guint ephy_zoom_action_signals[LAST_SIGNAL] = { 0 };

static GObjectClass *parent_class = NULL;

GType
ephy_zoom_action_get_type (void)
{
        static GType ephy_zoom_action_type = 0;

        if (ephy_zoom_action_type == 0)
        {
                static const GTypeInfo our_info =
            {
                sizeof (EphyZoomActionClass),
                NULL, /* base_init */
                NULL, /* base_finalize */
                (GClassInitFunc) ephy_zoom_action_class_init,
                NULL,
                NULL, /* class_data */
                sizeof (EphyZoomAction),
                0, /* n_preallocs */
                (GInstanceInitFunc) ephy_zoom_action_init,
            };

                ephy_zoom_action_type = g_type_register_static (GTK_TYPE_ACTION,
                                "EphyZoomAction",
                                &our_info, 0);
        }

        return ephy_zoom_action_type;
}

static void
zoom_to_level_cb (EphyZoomControl *control,
          float zoom,
          EphyZoomAction *action)
{
    g_signal_emit (action,
               ephy_zoom_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
connect_proxy (GtkAction *action, GtkWidget *proxy)
{
    g_signal_connect_object (action, "notify::zoom",
                 G_CALLBACK (sync_zoom_cb), proxy, 0);

    g_signal_connect (proxy, "zoom_to_level", GTK_SIGNAL_FUNC(zoom_to_level_cb), action);

    GTK_ACTION_CLASS (parent_class)->connect_proxy (action, proxy);
}

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);
            g_object_notify (object, "zoom");
            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;
    }
}

static void
ephy_zoom_action_class_init (EphyZoomActionClass *class)
{
    GtkActionClass *action_class;
    GObjectClass *object_class = G_OBJECT_CLASS (class);

    object_class->set_property = ephy_zoom_action_set_property;
    object_class->get_property = ephy_zoom_action_get_property;
    object_class->finalize = ephy_zoom_action_finalize;

    parent_class = g_type_class_peek_parent (class);
    action_class = GTK_ACTION_CLASS (class);

    action_class->toolbar_item_type = EPHY_TYPE_ZOOM_CONTROL;
    action_class->connect_proxy = connect_proxy;

    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));

    ephy_zoom_action_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);
}

static void
ephy_zoom_action_init (EphyZoomAction *action)
{
    action->priv = g_new0 (EphyZoomActionPrivate, 1);

    action->priv->zoom = 1.0;
}

static void
ephy_zoom_action_finalize (GObject *object)
{
    EphyZoomAction *action = EPHY_ZOOM_ACTION (object);

    g_free (action->priv);

    G_OBJECT_CLASS (parent_class)->finalize (object);
}

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;
}