/// <summary>
/// 初始化
/// </summary>
protected virtual void Init()
{
downloadQueue.Clear();
Tile minTile;
Tile maxTile;
DownloadZoom item;
for (int i = minDownloadZoom; i <= maxDownloadZoom; i++)
{
minTile = Utility.GetTile(i, downloadExtent.MinLongitude, downloadExtent.MaxLatitude);
maxTile = Utility.GetTile(i, downloadExtent.MaxLongitude, downloadExtent.MinLatitude);
item = new DownloadZoom()
{
Zoom = i,
MinTileX = minTile.X,
MaxTileX = maxTile.X,
MinTileY = minTile.Y,
MaxTileY = maxTile.Y
};
if (downloadQueue.Count > 0)
{
item.Prev = downloadQueue[downloadQueue.Count - 1];
downloadQueue[downloadQueue.Count - 1].Next = item;
}
item.Downloader = this;
downloadQueue.Add(item);
}
downloadTileCount = (ulong)downloadQueue.Sum(d => d.TileCount);
}
/// <summary>
/// 将下载写到日志文件里
/// </summary>
/// <param name="downloadItem"></param>
private static XElement DownloadZoomItemConfig(DownloadZoom downloadItem)
{
return new XElement("item",
new XAttribute("zoom", downloadItem.Zoom.ToString())
, new XElement("minTileX", downloadItem.MinTileX.ToString())
, new XElement("maxTileX", downloadItem.MaxTileX.ToString())
, new XElement("minTileY", downloadItem.MinTileY.ToString())
, new XElement("maxTileY", downloadItem.MaxTileY.ToString())
, new XElement("tileCount", downloadItem.TileCount.ToString())
, new XElement("curTileX", downloadItem.CurTileX.ToString())
, new XElement("curTileY", downloadItem.CurTileY.ToString())
, new XElement("downloadedTileCount", downloadItem.DownloadedTileCount.ToString()));
}
/// <summary>
/// 读取一个下载层
/// </summary>
/// <param name="ele"></param>
/// <returns></returns>
public static DownloadZoom ReadDownloadZoom(XElement ele)
{
if (ele == null) return null;
DownloadZoom downloadZoom = new DownloadZoom();
downloadZoom.Zoom = int.Parse(ele.Attribute("zoom").Value);
downloadZoom.MinTileX = long.Parse(ele.Element("minTileX").Value);
downloadZoom.MaxTileX = long.Parse(ele.Element("maxTileX").Value);
downloadZoom.MinTileY = long.Parse(ele.Element("minTileY").Value);
downloadZoom.MaxTileY = long.Parse(ele.Element("maxTileY").Value);
downloadZoom.CurTileX = long.Parse(ele.Element("curTileX").Value);
downloadZoom.CurTileY = long.Parse(ele.Element("curTileY").Value);
return downloadZoom;
}
/// <summary>
/// 更新下载记录状态
/// </summary>
/// <param name="downloadItem"></param>
public static void UpdateDownloading(DownloadZoom downloadItem)
{
lock (lockInstance)
{
MapServerDownloader downloader = downloadItem.Downloader;
XElement eleUpdate;
eleUpdate = configDoc.Root.Element("downloadedTileCount");
eleUpdate.Value = downloader.DownloadedTileCount.ToString();
eleUpdate = configDoc.Root.Element("curDownloadZoom");
eleUpdate.Value = downloadItem.Zoom.ToString();
XElement ele = configDoc.Root.Element("items").Elements()
.Where(e => e.Attribute("zoom").Value.Trim() == downloadItem.Zoom.ToString())
.FirstOrDefault();
if (ele == null)
{
return;
}
eleUpdate = ele.Element("curTileX");
eleUpdate.Value = downloadItem.CurTileX.ToString();
eleUpdate = ele.Element("curTileY");
eleUpdate.Value = downloadItem.CurTileY.ToString();
eleUpdate = ele.Element("downloadedTileCount");
eleUpdate.Value = downloadItem.DownloadedTileCount.ToString();
Save();
}
}
