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/*
* Copyright (C) 2010-2013 Jiri Techet <techet@gmail.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
*/
/**
* SECTION:champlain-null-tile-source
* @short_description: A tile source that doesn't load map data from anywhere
*
* This map source does not provide any input data to the associated renderer.
* This can be useful in situations when the tile can be rendered independently
* of any input such as in the case of the #ChamplainErrorTileRenderer.
*/
#include "champlain-null-tile-source.h"
#include "champlain-debug.h"
#include "champlain-bounding-box.h"
#include "champlain-enum-types.h"
#include "champlain-tile.h"
G_DEFINE_TYPE (ChamplainNullTileSource, champlain_null_tile_source, CHAMPLAIN_TYPE_TILE_SOURCE)
static void fill_tile (ChamplainMapSource *map_source,
ChamplainTile *tile);
static void
champlain_null_tile_source_dispose (GObject *object)
{
G_OBJECT_CLASS (champlain_null_tile_source_parent_class)->dispose (object);
}
static void
champlain_null_tile_source_finalize (GObject *object)
{
G_OBJECT_CLASS (champlain_null_tile_source_parent_class)->finalize (object);
}
static void
champlain_null_tile_source_class_init (ChamplainNullTileSourceClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
ChamplainMapSourceClass *map_source_class = CHAMPLAIN_MAP_SOURCE_CLASS (klass);
object_class->dispose = champlain_null_tile_source_dispose;
object_class->finalize = champlain_null_tile_source_finalize;
map_source_class->fill_tile = fill_tile;
}
static void
champlain_null_tile_source_init (ChamplainNullTileSource *self)
{
g_return_if_fail (CHAMPLAIN_IS_NULL_TILE_SOURCE (self));
}
/**
* champlain_null_tile_source_new_full:
* @renderer: the #ChamplainRenderer used to render tiles
*
* Constructor of #ChamplainNullTileSource.
*
* Returns: a constructed #ChamplainNullTileSource object
*
* Since: 0.8
*/
ChamplainNullTileSource *
champlain_null_tile_source_new_full (ChamplainRenderer *renderer)
{
ChamplainNullTileSource *source;
source = g_object_new (CHAMPLAIN_TYPE_NULL_TILE_SOURCE,
"renderer", renderer,
NULL);
return source;
}
static void
tile_rendered_cb (ChamplainTile *tile,
gpointer data,
guint size,
gboolean error,
ChamplainMapSource *map_source)
{
ChamplainMapSource *next_source;
g_signal_handlers_disconnect_by_func (tile, tile_rendered_cb, map_source);
next_source = champlain_map_source_get_next_source (map_source);
if (!error)
{
ChamplainTileSource *tile_source = CHAMPLAIN_TILE_SOURCE (map_source);
ChamplainTileCache *tile_cache = champlain_tile_source_get_cache (tile_source);
if (tile_cache && data)
champlain_tile_cache_store_tile (tile_cache, tile, data, size);
champlain_tile_set_fade_in (tile, TRUE);
champlain_tile_set_state (tile, CHAMPLAIN_STATE_DONE);
champlain_tile_display_content (tile);
}
else if (next_source)
champlain_map_source_fill_tile (next_source, tile);
g_object_unref (map_source);
g_object_unref (tile);
}
static void
fill_tile (ChamplainMapSource *map_source,
ChamplainTile *tile)
{
g_return_if_fail (CHAMPLAIN_IS_NULL_TILE_SOURCE (map_source));
g_return_if_fail (CHAMPLAIN_IS_TILE (tile));
ChamplainMapSource *next_source = champlain_map_source_get_next_source (map_source);
if (champlain_tile_get_state (tile) == CHAMPLAIN_STATE_DONE)
return;
if (champlain_tile_get_state (tile) != CHAMPLAIN_STATE_LOADED)
{
ChamplainRenderer *renderer;
renderer = champlain_map_source_get_renderer (map_source);
g_return_if_fail (CHAMPLAIN_IS_RENDERER (renderer));
g_object_ref (map_source);
g_object_ref (tile);
g_signal_connect (tile, "render-complete", G_CALLBACK (tile_rendered_cb), map_source);
champlain_renderer_render (renderer, tile);
}
else if (CHAMPLAIN_IS_MAP_SOURCE (next_source))
champlain_map_source_fill_tile (next_source, tile);
else if (champlain_tile_get_state (tile) == CHAMPLAIN_STATE_LOADED)
{
/* if we have some content, use the tile even if it wasn't validated */
champlain_tile_set_state (tile, CHAMPLAIN_STATE_DONE);
champlain_tile_display_content (tile);
}
}
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