public Image GetImageFromCache(GMapType type, Point pos, int zoom, string language)
{
Image ret = null;
try
{
StringBuilder dir = new StringBuilder(tileCache);
dir.AppendFormat("{0}{1}{2}{3}{4}{5}{6}{7}", zoom, Path.DirectorySeparatorChar, language, Path.DirectorySeparatorChar, pos.X, Path.DirectorySeparatorChar, pos.Y, Path.DirectorySeparatorChar);
{
dir.AppendFormat("{0}.png", type.ToString());
}
if(File.Exists(dir.ToString()))
{
FileInfo f = new FileInfo(dir.ToString());
if(f.Length == 0)
{
f.Delete();
}
else
{
using(FileStream s = f.Open(FileMode.Open, FileAccess.Read, FileShare.Read))
{
ret = Image.FromStream(s);
s.Close();
}
}
}
}
catch
{
ret = null;
}
return ret;
}
public void CacheImage(Image tile, GMapType type, Point pos, int zoom, string language)
{
try
{
using(tile)
{
StringBuilder dir = new StringBuilder(tileCache);
dir.AppendFormat("{0}{1}{2}{3}{4}{5}{6}{7}", zoom, Path.DirectorySeparatorChar, language, Path.DirectorySeparatorChar, pos.X, Path.DirectorySeparatorChar, pos.Y, Path.DirectorySeparatorChar);
string d = dir.ToString();
// precrete dir
if(!Directory.Exists(d))
{
Directory.CreateDirectory(d);
}
// save
{
dir.AppendFormat("{0}.png", type.ToString());
using(FileStream s = File.Open(dir.ToString(), FileMode.Create, FileAccess.Write, FileShare.None))
{
tile.Save(s, System.Drawing.Imaging.ImageFormat.Png);
s.Flush();
s.Close();
}
// remove crap
FileInfo f = new FileInfo(dir.ToString());
if(f.Length == 0)
{
File.Delete(dir.ToString());
}
}
}
}
catch
{
}
}
/// <summary>
/// gets image from google
/// </summary>
/// <param name="type"></param>
/// <param name="lat"></param>
/// <param name="lng"></param>
/// <param name="zoom"></param>
/// <param name="language"></param>
/// <param name="cache"></param>
/// <returns></returns>
internal Image GetImageFrom(GMapType type, double lat, double lng, int zoom, string language, bool cache)
{
Point t = FromLatLngToPixel(lat, lng, zoom);
Point pos = FromPixelToTileXY(t);
Image ret = null;
ret = Cache.GetImageFromCache(type, pos, zoom, language);
if(ret != null)
{
return ret;
}
ret = GetImageFromUrl(MakeImageUrl(type, pos, zoom, language));
if(ret != null && cache)
{
Cache.CacheImage(ret.Clone() as Image, type, pos, zoom, language);
}
return ret;
}
/// <summary>
/// gets image from google
/// </summary>
/// <param name="type"></param>
/// <param name="pos"></param>
/// <param name="zoom"></param>
/// <param name="language"></param>
/// <param name="cache"></param>
/// <returns></returns>
internal Image GetImageFrom(GMapType type, Point pos, int zoom, string language, bool cache)
{
Image ret = null;
ret = Cache.GetImageFromCache(type, pos, zoom, language);
if(ret != null)
{
return ret;
}
ret = GetImageFromUrl(MakeImageUrl(type, pos, zoom, language));
if(ret != null && cache)
{
Cache.CacheImage(ret.Clone() as Image, type, pos, zoom, language);
}
return ret;
}
/// <summary>
/// makes url for image
/// </summary>
/// <param name="type"></param>
/// <param name="pos"></param>
/// <param name="zoom"></param>
/// <param name="language"></param>
/// <returns></returns>
internal string MakeImageUrl(GMapType type, Point pos, int zoom, string language)
{
string server = string.Empty;
string request = string.Empty;
string version = string.Empty;
switch(type)
{
case GMapType.Map:
server = "mt";
request = "mt";
version = VersionMap;
break;
case GMapType.Satellite:
server = "khm";
request = "kh";
version = VersionSatellite;
break;
case GMapType.Labels:
server = "mt";
request = "mt";
version = VersionLabels;
break;
/*
case GoogleMapType.SatelliteAndLabels:
server = "mt";
request = "mt";
version = VersionLabels;
return "don't work yet ;}";
break;
*/
case GMapType.Terrain:
server = "mt";
request = "mt";
version = VersionTerrain;
break;
}
int servernum = (pos.X + 2 * pos.Y) % 4;
string sec1 = ""; // after &x=...
string sec2 = ""; // after &zoom=...
int seclen = ((pos.X*3) + pos.Y) % 8;
sec2 = SecWord.Substring(0, seclen);
if(pos.Y >= 10000 && pos.Y < 100000)
{
sec1 = "&s=";
}
return string.Format("http://{0}{1}.google.com/{2}?v={3}&hl={4}&x={5}{6}&y={7}&z={8}&s={9}", server, servernum.ToString(), request, version, language, pos.X.ToString(), sec1, pos.Y.ToString(), zoom.ToString(), sec2);
}
/// <summary>
/// makes url for image
/// </summary>
/// <param name="type"></param>
/// <param name="lat"></param>
/// <param name="lng"></param>
/// <param name="zoom"></param>
/// <param name="language"></param>
/// <returns></returns>
internal string MakeImageUrl(GMapType type, double lat, double lng, int zoom, string language)
{
Point t = FromLatLngToPixel(lat, lng, zoom);
Point p = FromPixelToTileXY(t);
return MakeImageUrl(type, p, zoom, language);
}
/// <summary>
/// get images from list and cache it
/// </summary>
/// <param name="list"></param>
/// <param name="type"></param>
/// <param name="zoom"></param>
/// <param name="language"></param>
/// <returns>successfully downloaded tile count</returns>
public int PrecacheTiles(List<Point> list, GMapType type, int zoom, string language)
{
int countOk = 0;
GMapControl.Shuffle<Point>(list);
foreach(Point p in list)
{
Image img = GetImageFrom(type, p, zoom, language, true);
if(img != null)
{
countOk++;
System.Threading.Thread.Sleep(1000);
}
}
return countOk;
}