private static GeoDo.RSS.Core.DF.CoordEnvelope PrjToGeoCoordEvp(Core.DrawEngine.CoordEnvelope viewPrjEvp, ICoordinateTransform tans)
{
double minX = 0;
double minY = 0;
double maxX = 0;
double maxY = 0;
tans.Prj2Geo(viewPrjEvp.MinX, viewPrjEvp.MinY, out minX, out minY);
tans.Prj2Geo(viewPrjEvp.MaxX, viewPrjEvp.MaxY, out maxX, out maxY);
return(new GeoDo.RSS.Core.DF.CoordEnvelope(minX, maxX, minY, maxY));
}
private void PrjToGeo(CoordPoint pt, ICoordinateTransform coordTran)
{
double prjX = 0, prjY = 0;
coordTran.Prj2Geo(pt.X, pt.Y, out prjX, out prjY);
pt.X = prjX;
pt.Y = prjY;
}
private CoordPoint SrceenToGeo(PointF pt, ICoordinateTransform coordTran)
{
double prjX = 0, prjY = 0;
double geoX = 0, geoY = 0;
coordTran.Screen2Prj(pt.X, pt.Y, out prjX, out prjY);
coordTran.Prj2Geo(prjX, prjY, out geoX, out geoY);
return(new CoordPoint(geoX, geoY));
}
private static Size GetMaxDataSize(ICanvas canvas, Core.DrawEngine.CoordEnvelope viewPrjEvp, IRasterDataProvider prd,
out GeoDo.RSS.Core.DF.CoordEnvelope viewGeoEvp)
{
viewGeoEvp = null;
if (prd == null)
{
return(Size.Empty);
}
viewGeoEvp = null;
ICoordinateTransform tans = canvas.CoordTransform;
viewGeoEvp = PrjToGeoCoordEvp(viewPrjEvp, tans);
if (prd.CoordType == enumCoordType.PrjCoord)
{
return(new Size((int)(viewPrjEvp.Width / prd.ResolutionX), (int)(viewPrjEvp.Height / prd.ResolutionY)));
}
else
{
double wid = 0;
double hei = 0;
tans.Prj2Geo(viewPrjEvp.Width, viewPrjEvp.Height, out wid, out hei);
return(new Size((int)(wid / prd.ResolutionX), (int)(hei / prd.ResolutionY)));
}
}
private void DrawLabel(Graphics g, QuickTransform quickTran)
{
if (!_enableLabling)
{
return;
}
try
{
int idx = 0;
int firstLine = -1;
double geoX, geoY;
string labelGeoX = string.Empty, labelGeoY = string.Empty;
PointF pt;
//label lonlines
int endLon = Math.Min(_lonLines, _gridLines.Count);
for (int iLine = 0; iLine < endLon; iLine += _lonLabelStep)
{
idx = ComputeLabelLocationOfLon(_gridLines[iLine]);
if (idx == -1)
{
continue;
}
if (firstLine == -1)
{
firstLine = iLine;
}
pt = _allPixelPoints[idx];
geoX = _allPrjPoints[idx].X;
geoY = _allPrjPoints[idx].Y;
_coordTransfrom.Prj2Geo(geoX, geoY, out geoX, out geoY);
if (double.IsInfinity(geoX) || double.IsNaN(geoX) || double.IsInfinity(geoY) || double.IsNaN(geoY))
{
continue;
}
float dlt = 0.005f;
if (geoX < 0)
{
dlt = -0.005f;
}
geoX += dlt;
labelGeoX = LabelFormatLon(geoX);
//避免-180和90重叠
if (iLine == firstLine)
{
pt.X += _fontSize.Height;
}
pt.Y = (20 - _fontSize.Height) / 2;
if (!_enableMaskColor || _maskBrush == null)
{
g.DrawString(labelGeoX, _labelFont, _labelBrush, pt);
}
else
{
DrawStringWithBorder(labelGeoX, g, pt, _labelFont, _labelBrush, _maskBrush);
}
}
//label latlines
firstLine = -1;
int begin = Math.Min(_latLines + _lonLines, _gridLines.Count);
int endLat = Math.Min(_lonLines, _gridLines.Count);
for (int iLine = begin - 1; iLine > endLat; iLine -= _latLabelStep)
{
idx = ComputeLabelLocationOfLat(_gridLines[iLine]);
if (idx == -1)
{
continue;
}
if (firstLine == -1)
{
firstLine = iLine;
}
pt = _allPixelPoints[idx];
geoX = _allPrjPoints[idx].X;
geoY = _allPrjPoints[idx].Y;
_coordTransfrom.Prj2Geo(geoX, geoY, out geoX, out geoY);
if (double.IsInfinity(geoX) || double.IsNaN(geoX) || double.IsInfinity(geoY) || double.IsNaN(geoY))
{
continue;
}
float dlt = 0.005f;
if (geoY < 0)
{
dlt = -0.005f;
}
geoY += dlt;
labelGeoY = LabelFormatLat(geoY);
//避免90和-180重叠
if (iLine == firstLine)
{
pt.Y += _fontSize.Height;
}
pt.X = (20 - _fontSize.Width) / 2;
SizeF stringSize = g.MeasureString(labelGeoY, _labelFont);
g.TranslateTransform(stringSize.Width / 2, stringSize.Height / 2); //设置旋转中心为文字中心
g.RotateTransform(90f); //旋转
if (!_enableMaskColor || _maskBrush == null)
{
g.DrawString(labelGeoY, _labelFont, _labelBrush, pt);
}
else
{
DrawStringWithBorder(labelGeoY, g, pt, _labelFont, _labelBrush, _maskBrush);
}
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}