private void SetTileSource(MapTile tile, TileId tileId, MultiScaleTileSource source)
{
bool refresh = false;
if (!tileId.Equals(tile.TileId))
{
tile.TileId = tileId;
refresh = true;
}
while (true)
{
TileSource tileSource = source.GetTileSource(tileId);
if (tileSource != null)
{
if (tile.Source != tileSource || refresh)
{
tile.Source = tileSource;
}
if (tileSource.IsUsed)
{
this.usedTiles.Add(tileSource);
this.unusedTiles.Remove(tileSource);
break;
}
else
{
tileSource = null;
}
}
if (tileSource == null)
{
tileId = this.ReduceTileId(tileId);
if (tileId == null)
{
tile.Source = null;
break;
}
}
}
}
