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/*
* Copyright (C) 2008-2009 Pierre-Luc Beaudoin <pierre-luc@pierlux.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "champlain-map.h"
#define DEBUG_FLAG CHAMPLAIN_DEBUG_LOADING
#include "champlain-debug.h"
#include "champlain-zoom-level.h"
#include <math.h>
Map*
map_new (void)
{
Map *map = g_new0 (Map, 1);
map->previous_level = NULL;
map->current_level = NULL;
return map;
}
void
map_load_level (Map *map,
ChamplainMapSource *map_source,
gint zoom_level)
{
if (map->previous_level != NULL)
{
if (champlain_zoom_level_get_zoom_level (map->previous_level) == zoom_level)
{
/* Swap current and previous, instead of reloading it */
ChamplainZoomLevel *tmp = map->previous_level;
map->previous_level = map->current_level;
map->current_level = tmp;
return;
}
else
g_object_unref (map->previous_level);
}
map->previous_level = map->current_level;
guint row_count = champlain_map_source_get_row_count (map_source, zoom_level);
guint column_count = champlain_map_source_get_column_count (map_source, zoom_level);
map->current_level = champlain_zoom_level_new ();
g_object_set (G_OBJECT (map->current_level),
"zoom-level", zoom_level,
"width", row_count,
"height", column_count,
NULL);
}
gboolean
map_zoom_in (Map *map,
ChamplainMapSource *source)
{
guint new_level = champlain_zoom_level_get_zoom_level (map->current_level) + 1;
if(new_level <= champlain_map_source_get_max_zoom_level (source))
{
map_load_level (map, source, new_level);
return TRUE;
}
return FALSE;
}
gboolean
map_zoom_out (Map *map,
ChamplainMapSource *source)
{
gint new_level = champlain_zoom_level_get_zoom_level (map->current_level) - 1;
if(new_level >= champlain_map_source_get_min_zoom_level (source))
{
map_load_level (map, source, new_level);
return TRUE;
}
return FALSE;
}
void
map_free (Map *map)
{
if (map->previous_level != NULL)
g_object_unref (map->previous_level);
if (map->current_level != NULL)
g_object_unref (map->current_level);
g_free (map);
}
gboolean
map_zoom_to (Map *map,
ChamplainMapSource *source,
guint zoomLevel)
{
if (zoomLevel <= champlain_map_source_get_max_zoom_level (source))
{
map_load_level (map, source, zoomLevel);
return TRUE;
}
return FALSE;
}
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