Fix <GTK 2.24 combo box usage.

[andy/viking.git] / src / vikwebtoolcenter.c

/*
 * viking -- GPS Data and Topo Analyzer, Explorer, and Manager
 *
 * Copyright (C) 2008, Guilhem Bonnefille <guilhem.bonnefille@gmail.com>
 *
 * 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 of the License, 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 "vikwebtoolcenter.h"

#include <string.h>

#include <glib.h>
#include <glib/gi18n.h>

#include "util.h"
#include "globals.h"

static void webtool_center_class_init ( VikWebtoolCenterClass *klass );
static void webtool_center_init ( VikWebtoolCenter *vwd );

static GObjectClass *parent_class;

static void webtool_center_finalize ( GObject *gob );

static guint8 webtool_center_mpp_to_zoom ( VikWebtool *self, gdouble mpp );
static gchar *webtool_center_get_url ( VikWebtool *vw, VikWindow *vwindow );

typedef struct _VikWebtoolCenterPrivate VikWebtoolCenterPrivate;

struct _VikWebtoolCenterPrivate
{
  gchar *url;
};

#define WEBTOOL_CENTER_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), \
                                       VIK_WEBTOOL_CENTER_TYPE,          \
                                       VikWebtoolCenterPrivate))

GType vik_webtool_center_get_type()
{
  static GType w_type = 0;

  if (!w_type)
  {
    static const GTypeInfo w_info = 
    {
      sizeof (VikWebtoolCenterClass),
      NULL, /* base_init */
      NULL, /* base_finalize */
      (GClassInitFunc) webtool_center_class_init,
      NULL, /* class_finalize */
      NULL, /* class_data */
      sizeof (VikWebtoolCenter),
      0,
      (GInstanceInitFunc) webtool_center_init,
    };
    w_type = g_type_register_static ( VIK_WEBTOOL_TYPE, "VikWebtoolCenter", &w_info, 0 );
  }

  return w_type;
}

enum
{
  PROP_0,

  PROP_URL,
};

static void
webtool_center_set_property (GObject      *object,
                             guint         property_id,
                             const GValue *value,
                             GParamSpec   *pspec)
{
  VikWebtoolCenter *self = VIK_WEBTOOL_CENTER (object);
  VikWebtoolCenterPrivate *priv = WEBTOOL_CENTER_GET_PRIVATE (self);

  switch (property_id)
    {
    case PROP_URL:
      g_free (priv->url);
      priv->url = g_value_dup_string (value);
      g_debug ("VikWebtoolCenter.url: %s", priv->url);
      break;

    default:
      /* We don't have any other property... */
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
      break;
    }
}

static void
webtool_center_get_property (GObject    *object,
                             guint       property_id,
                             GValue     *value,
                             GParamSpec *pspec)
{
  VikWebtoolCenter *self = VIK_WEBTOOL_CENTER (object);
  VikWebtoolCenterPrivate *priv = WEBTOOL_CENTER_GET_PRIVATE (self);

  switch (property_id)
    {
    case PROP_URL:
      g_value_set_string (value, priv->url);
      break;

    default:
      /* We don't have any other property... */
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
      break;
    }
}

static void webtool_center_class_init ( VikWebtoolCenterClass *klass )
{
  GObjectClass *gobject_class;
  VikWebtoolClass *base_class;
  GParamSpec *pspec;

  gobject_class = G_OBJECT_CLASS (klass);

  gobject_class->finalize = webtool_center_finalize;
  gobject_class->set_property = webtool_center_set_property;
  gobject_class->get_property = webtool_center_get_property;

  pspec = g_param_spec_string ("url",
                               "Template Url",
                               "Set the template url",
                               VIKING_URL /* default value */,
                               G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE);
  g_object_class_install_property (gobject_class,
                                   PROP_URL,
                                   pspec);

  parent_class = g_type_class_peek_parent (klass);

  base_class = VIK_WEBTOOL_CLASS ( klass );
  base_class->get_url = webtool_center_get_url;

  klass->mpp_to_zoom = webtool_center_mpp_to_zoom;

  g_type_class_add_private (klass, sizeof (VikWebtoolCenterPrivate));
}

VikWebtoolCenter *vik_webtool_center_new ()
{
  return VIK_WEBTOOL_CENTER ( g_object_new ( VIK_WEBTOOL_CENTER_TYPE, NULL ) );
}

VikWebtoolCenter *vik_webtool_center_new_with_members ( const gchar *label, const gchar *url )
{
  VikWebtoolCenter *result = VIK_WEBTOOL_CENTER ( g_object_new ( VIK_WEBTOOL_CENTER_TYPE,
                                                                 "label", label,
                                                                 "url", url,
                                                                 NULL ) );

  return result;
}

static void webtool_center_init ( VikWebtoolCenter *self )
{
  VikWebtoolCenterPrivate *priv = WEBTOOL_CENTER_GET_PRIVATE (self);
  priv->url = NULL;
}

static void webtool_center_finalize ( GObject *gob )
{
  VikWebtoolCenterPrivate *priv = WEBTOOL_CENTER_GET_PRIVATE ( gob );
  g_free ( priv->url ); priv->url = NULL;
  G_OBJECT_CLASS(parent_class)->finalize(gob);
}

/* 1 << (x) is like a 2**(x) */
#define GZ(x) (1<<(x))

static const gdouble scale_mpps[] = { GZ(0), GZ(1), GZ(2), GZ(3), GZ(4), GZ(5), GZ(6), GZ(7), GZ(8), GZ(9),
                                      GZ(10), GZ(11), GZ(12), GZ(13), GZ(14), GZ(15), GZ(16), GZ(17) };

static const gint num_scales = (sizeof(scale_mpps) / sizeof(scale_mpps[0]));

#define ERROR_MARGIN 0.01
static guint8 webtool_center_mpp_to_zoom ( VikWebtool *self, gdouble mpp ) {
  gint i;
  for ( i = 0; i < num_scales; i++ ) {
    if ( ABS(scale_mpps[i] - mpp) < ERROR_MARGIN ) {
      g_debug ( "webtool_center_mpp_to_zoom: %f -> %d", mpp, i );
      return i;
    }
  }
  return 255;
}

static gchar *webtool_center_get_url ( VikWebtool *self, VikWindow *vwindow )
{
  VikWebtoolCenterPrivate *priv = NULL;
  VikViewport *viewport = NULL;
  const VikCoord *coord = NULL;
  guint8 zoom = 0;
  struct LatLon ll;
  gchar strlat[G_ASCII_DTOSTR_BUF_SIZE], strlon[G_ASCII_DTOSTR_BUF_SIZE];

  priv = WEBTOOL_CENTER_GET_PRIVATE (self);
  viewport = vik_window_viewport ( vwindow );

  // Coords
  coord = vik_viewport_get_center ( viewport );
  vik_coord_to_latlon ( coord, &ll );

  // zoom - ideally x & y factors need to be the same otherwise use a default
  if ( vik_viewport_get_xmpp ( viewport ) == vik_viewport_get_ympp ( viewport ) )
    zoom = vik_webtool_center_mpp_to_zoom ( self, vik_viewport_get_zoom ( viewport ) );
  else
    zoom = 1.0;

  // Cannot simply use g_strdup_printf and gdouble due to locale.
  // As we compute an URL, we have to think in C locale.
  g_ascii_dtostr (strlat, G_ASCII_DTOSTR_BUF_SIZE, ll.lat);
  g_ascii_dtostr (strlon, G_ASCII_DTOSTR_BUF_SIZE, ll.lon);

  return g_strdup_printf ( priv->url, strlat, strlon, 17-zoom );
}

guint8 vik_webtool_center_mpp_to_zoom (VikWebtool *self, gdouble mpp)
{
  return VIK_WEBTOOL_CENTER_GET_CLASS( self )->mpp_to_zoom( self, mpp );
}