/// <summary>
/// 瓦片下载完成
/// </summary>
/// <param name="downloader"></param>
/// <param name="tile"></param>
private void TileDownloadCompleted(Core.MapServerDownloader downloader, Core.Tile tile)
{
string logFormat = "当前线程：{0} 瓦片：{1},{2},{3} 时间：{4}";
Core.Log.Write(logFile,
string.Format(logFormat, System.Threading.Thread.CurrentThread.Name
, tile.X.ToString(), tile.Y.ToString(), tile.Zoom.ToString(), DateTime.Now.ToString("MM-dd HH:mm:ss ffff")));
statusbar_progress.Value = (int)((downloader.DownloadedTileCount / (decimal)downloader.DownloadTileCount) * 100);
statusbar_status.Text = "下载中......" + downloader.DownloadedTileCount.ToString() + "/" + downloader.DownloadTileCount.ToString();
}
/// <summary>
/// 经纬度所在的瓦片
/// </summary>
/// <param name="zoom"></param>
/// <param name="lon"></param>
/// <param name="lat"></param>
/// <returns></returns>
public static Tile GetTile(int zoom, double lon, double lat)
{
Tile tile = new Tile();
//（经度+180）÷360×262144 = 经度图片编号
tile.X = (long)((lon + 180.0) / 360 * Math.Pow(2, zoom));
double siny = Math.Sin(lat * Math.PI / 180);
double y = Math.Log((1 + siny) / (1 - siny));
tile.Y = (long)((128 * Math.Pow(2, zoom)) * (1 - y / (2 * Math.PI)) / 256);
return tile;
}
/// <summary>
/// 下载
/// </summary>
protected virtual void Download()
{
if (CurDownloadZoom == null)
{
cts.Cancel();
return;
}
CreateZoomDirectory(CurDownloadZoom.Zoom);
#region 锁定下载
Tile tile;
lock (lockObject)
{
tile = new Tile(CurDownloadZoom.CurTileX, CurDownloadZoom.CurTileY, CurDownloadZoom.Zoom);
tile.DownloadZoom = CurDownloadZoom;
GetTilePath(tile);
if ((CurDownloadZoom.CurTileY + 1) > CurDownloadZoom.MaxTileY)
{
if ((CurDownloadZoom.CurTileX + 1) > CurDownloadZoom.MaxTileX)
{
CurDownloadZoom = CurDownloadZoom.Next;
}
else
{
++CurDownloadZoom.CurTileX;
CurDownloadZoom.CurTileY = CurDownloadZoom.MinTileY;
}
}
else
{
++tile.DownloadZoom.CurTileY;
}
}
SaveTile(tile);
Download();
#endregion
if (task.IsCompleted && CurDownloadZoom != null)
{
task.Start();
}
}
/// <summary>
/// 保存Tile
/// </summary>
/// <param name="tile"></param>
public virtual void SaveTile(Tile tile)
{
string row_1 = (tile.X / 1000000).ToString().PadLeft(3, '0');
string row_2 = ((tile.X % 1000000) / 1000).ToString().PadLeft(3, '0');
string row_3 = (tile.X % 1000).ToString().PadLeft(3, '0');
string col_1 = (tile.Y / 1000000).ToString().PadLeft(3, '0');
string col_2 = ((tile.Y % 1000000) / 1000).ToString().PadLeft(3, '0');
string col_3 = (tile.Y % 1000).ToString().PadLeft(3, '0');
string dir = savePath + "/" + tile.Zoom.ToString().PadLeft(2, '0') + "/" + row_1 + "/" + row_2 + "/" + row_3
+ "/" + col_1 + "/" + col_2;
if (!Directory.Exists(dir))
{
Directory.CreateDirectory(dir);
}
string fileName = dir + "/" + col_3 + ".png";
//DownloadFile(tile.UrlPath, fileName);
DownloadFileWithHttpRequest(tile.UrlPath, fileName);
#region 下载完成触发事件
if (TileDownloadCompleted != null)
{
TileDownloadCompleted(this, tile);
++downloadedTileCount;
Core.DownloadConfig.UpdateDownloading(tile.DownloadZoom);
}
if (downloadedTileCount == downloadTileCount)
{
if (DownloadCompleted != null)
{
DownloadCompleted();//下载完成
}
StopDownload();//停止下载
}
#endregion
}
/// <summary> /// 下载单张瓦片 /// </summary> /// <param name="tile"></param> public abstract void GetTilePath(Tile tile);