/// <summary>
/// 屏幕坐标转经纬度
/// </summary>
/// <param name="p"></param>
/// <returns></returns>
public PointLatLng PointToLatLng(PointInt p)
{
PointLatLng pll = null;
var pPix = MapCenterPix.GetOffSet(p.X - ScreenArea.Width / 2, p.Y - ScreenArea.Height / 2);
pll = MercatorHelper.PixelToLatLng(pPix, Zoom);
return(pll);
}
/// <summary>
/// 地图中心偏移
/// </summary>
/// <param name="x"></param>
/// <param name="y"></param>
public void CenterMove(double x, double y, bool isUpdateTiles = true)
{
var centerPix = MapCenterPix;
centerPix = MapCenterPix.GetOffSet(x, y);
_mapCenter = MercatorHelper.PixelToLatLng(centerPix, Zoom);
_isNeedToUpdateTiles = true;
//Debug.WriteLine(string.Format("****缩放：鼠标点:【{0}】,中心坐标点:【{1}】,中心像素点:【{2}】,鼠标像素点【{3}】，鼠标经纬度【{8}】，层级:【{4}】,屏幕中心点：【{5}】\r\n像素偏移{6},屏幕坐标点偏移{7}"));
if (RectTilesBitmap != null && RectTilesBitmap.Contains(TilesArea) && RotationAngle == 0)
{
RectTilesBitmap.OffSet(-(int)x, -(int)y);
}
else
{
if (isUpdateTiles)
{
UpdateDrawTiles();
}
}
//TileDrawOffset.Offset(-(int)x, -(int)y);
}
public void UpdateDrawTiles()
{
IsTilesUpdating = true;
TilesUpdateLock.AcquireWriterLock(1000);
try
{
if (ScreenArea != null)
{
var width = TilesArea.Width;
var height = TilesArea.Height;
var pointLeftTopPix = TileCenterPix.GetOffSet(-width / 2, -height / 2); //左上角像素坐标
var tileXYLeftTop = MercatorHelper.PixelToTileXY(pointLeftTopPix); //左上角的瓦片索引
var tilePixLeftTop = MercatorHelper.TileXYToPixel(tileXYLeftTop); //左上角瓦片像素坐标
//var tileDrawPositionLeftTop = new PointInt((int)(tilePixLeftTop.X - pointLeftTopPix.X + 0.5), (int)(tilePixLeftTop.Y - pointLeftTopPix.Y + 0.5));//屏幕坐标系下左上角瓦片的屏幕坐标
var tileDrawPositionLeftTop = TilesArea.LeftTop.GetOffSet((int)(tilePixLeftTop.X - pointLeftTopPix.X), (int)(tilePixLeftTop.Y - pointLeftTopPix.Y));
var tileXYCenter = MercatorHelper.PixelToTileXY(TileCenterPix);//中心瓦片索引
//var tilePixCenter = MercatorHelper.TileXYToPixel(tileXYCenter);//中心瓦片左上角所在像素坐标
var xCount = (int)Math.Ceiling((double)width / TileSize.Width) + 1; //X方向的瓦片数量
var yCount = (int)Math.Ceiling((double)height / TileSize.Height) + 1; //Y方向的瓦片数量
RectTilesBitmap = new RectInt(tileDrawPositionLeftTop, xCount * TileSize.Width, yCount * TileSize.Height);
tileDrawPositionLeftTop = new PointInt(0, 0);
GridInfo = new DrawGrid
{
GridSize = TileSize,
LeftTop = RectTilesBitmap.LeftTop,
RightBottom = RectTilesBitmap.RightBottom,
XCount = xCount,
YCount = yCount,
};
//计算要显示的绘图瓦片
if (DicDrawTile == null)
{
DicDrawTile = new Dictionary <Tile, DrawTile>();
}
DicDrawTile.Clear();
var minTileIndex = MapHelper.GetTileMatrixMinXY(Zoom);
var maxTileIndex = MapHelper.GetTileMatrixMaxXY(Zoom);
List <Tile> lstWantToLoad = new List <Tile>();
List <DrawTile> lstDrawTile = new List <DrawTile>();
//DateTime rt = DateTime.Now;
for (int x = 0; x < xCount; x++)
{
for (int y = 0; y < yCount; y++)
{
var drawPostiton = tileDrawPositionLeftTop.GetOffSet(x * TileSize.Width, y * TileSize.Height);
//Tile t = new Tile(tileXYLeftTop.X + x, tileXYLeftTop.Y + y, Zoom);
Tile t = TileManager.Singleton.GetTile(Zoom, new PointInt64(tileXYLeftTop.X + x, tileXYLeftTop.Y + y));
if (t == null)
{
t = new Tile(tileXYLeftTop.X + x, tileXYLeftTop.Y + y, Zoom);
}
if (t.TileIndex.X >= minTileIndex.Width && t.TileIndex.Y >= minTileIndex.Height &&
t.TileIndex.X <= maxTileIndex.Width && t.TileIndex.Y <= maxTileIndex.Height) //范围判断
{
var rt = new DrawTile()
{
DrawPosition = drawPostiton,
Tile = t
};
lstDrawTile.Add(rt);
////if (RotationAngle == 0 || MapHelper.CheckTileCrossRect(new RectInt(dt.DrawPosition.GetOffSet(TilesArea.LeftTop.X, TilesArea.LeftTop.Y), TileSize.Width, TileSize.Height), ScreenArea, RotationAngle))
//{
// //DicDrawTile.Add(t, rt);
// lstDrawTile.Add(rt);
// //if (t.TileImg == null)
// //{
// // lstWantToLoad.Add(t);
// //}
//}
}
}
}
lstDrawTile = lstDrawTile.OrderBy(d => Math.Abs(d.Tile.TileIndex.X - tileXYCenter.X) + Math.Abs(d.Tile.TileIndex.Y - tileXYCenter.Y)).ToList();
foreach (var item in lstDrawTile)
{
if (item.Tile.State == TileState.New)
{
TileManager.Singleton.AddTile(item.Tile);
}
if (item.Tile.TileImg == null)
{
lstWantToLoad.Add(item.Tile);
}
item.Tile.ReadTime = DateTime.Now;
DicDrawTile.Add(item.Tile, item);
}
lstWantToLoad.ForEach(a => { TileManager.Singleton.LoadTile(a); });
//_lastTilesRect = tilesRect;
//TileDrawOffset = new PointInt(0,0);
if (TilesUpdateComplete != null)
{
TilesUpdateComplete(DicDrawTile);
}
}
}
finally
{
IsTilesUpdating = false;
TilesUpdateLock.ReleaseWriterLock();
}
}
/// <summary>
/// 获取层级变更后的地图中心点
/// </summary>
/// <param name="mp">鼠标缩放所在屏幕坐标</param>
/// <param name="mpLatLng">鼠标缩放前所在经纬度坐标</param>
//private void GetCenterOfterZoom(PointInt mp,PointLatLng mpLatLng)
//{
// var centerOffSet = new SizeDouble((double)(mp.X - ScreenArea.Center.X), (double)(mp.Y - ScreenArea.Center.Y));
// var mpPix = MercatorHelper.LatLngToPixel(mpLatLng, _zoom);
// var cPix = mpPix.GetOffSet(-centerOffSet.Width, -centerOffSet.Height);
// _mapCenter = MercatorHelper.PixelToLatLng(cPix, _zoom);
// //Debug.WriteLine(string.Format("****缩放：鼠标点:【{0}】,中心坐标点:【{1}】,中心像素点:【{2}】,鼠标像素点【{3}】，鼠标经纬度【{8}】，层级:【{4}】,屏幕中心点：【{5}】\r\n像素偏移{6},屏幕坐标点偏移{7}"
// // , mp, MapCenter, MapCenterPix, mpPix,Zoom,ScreenArea.Center,mpPix.GetOffSet(-MapCenterPix.X,-MapCenterPix.Y),centerOffSet, mpLatLng));
// UpdateDrawTiles();
//}
/// <summary>
/// 经纬度转屏幕坐标
/// </summary>
/// <param name="latlng"></param>
/// <returns></returns>
public PointInt LatLngToPoint(PointLatLng latlng)
{
var pPix = MercatorHelper.LatLngToPixel(latlng, Zoom).GetOffSet(-MapCenterPix.X, -MapCenterPix.Y).GetOffSet(ScreenArea.Width / 2, ScreenArea.Height / 2);
return(new PointInt((int)pPix.X, (int)pPix.Y));
}