public void Render(object sender, IDrawArgs drawArgs)
{
//左上角绘制信息列表
if (_infoItems.Count == 0)
{
return;
}
Graphics g = drawArgs.Graphics as Graphics;
float x = 50;
float y = 10;
SizeF fontSize = g.MeasureString("100", _font);
int rowStep = (int)(fontSize.Height + 2);
foreach (InfoItem item in _infoItems)
{
g.DrawString(item.ToString(), _font, Brushes.Yellow, x, y);
y += rowStep;
}
ICanvas canvas = sender as ICanvas;
if (_visible)
{
ICoordinateTransform coordTran = canvas.CoordTransform;
QuickTransform qt = drawArgs.QuickTransformArgs;
//绘制拐点
foreach (InfoItem item in _infoItems)
{
int row = 0, col = 0;
double geoX, geoY;
coordTran.Geo2Prj(item.Longitude, item.Latitude, out geoX, out geoY);
coordTran.Prj2Screen(geoX, geoY, out col, out row);
g.FillEllipse(Brushes.Yellow, new RectangleF(col - 3, row - 3, 6, 6));
}
//绘制冰缘线
if (_geoItems != null)
{
foreach (CodeCell.AgileMap.Core.Feature items in _geoItems)
{
GraphicsPath path = ToGraphicsPath(items, canvas);
g.DrawPath(Pens.Red, path);
}
}
}
}
private static Core.DrawEngine.CoordEnvelope GetDrawingEnvelop(ICanvas canvas, IRasterDataProvider prd)
{
if (prd == null)
{
return(null);
}
GeoDo.RSS.Core.DF.CoordEnvelope cop = prd.CoordEnvelope.Clone();
ICoordinateTransform tans = canvas.CoordTransform;
if (prd.CoordType == enumCoordType.PrjCoord)
{
return(new GeoDo.RSS.Core.DrawEngine.CoordEnvelope(cop.MinX, cop.MaxX, cop.MinY, cop.MaxY));
}
else
{
GeoDo.RSS.Core.DrawEngine.CoordEnvelope prjEvp = new Core.DrawEngine.CoordEnvelope(cop.MinX, cop.MaxX, cop.MinY, cop.MaxY);
tans.Geo2Prj(prjEvp);
return(prjEvp);
}
}
private void ComputeGridLines(ICoordinateTransform coordTran)
{
try
{
if (_gridLines != null)
{
_gridLines.Clear();
}
else
{
_gridLines = new List <GridLine>();
}
double span = _gridSpan;
int idx = 0;
double prjX, prjY;
double maxLon = 0d;
double maxLat = 0d;
double x = 0d, y = 0d;
//sample lon lines
foreach (Range range in _validLonRanges)
{
x = Math.Max(range.MinValue, _beginLon);
y = 0;
maxLon = Math.Min(range.MaxValue, _endLon);
maxLat = 0;
while (x <= maxLon)
{
y = Math.Max(_validLatRange.MinValue, _beginLat);
GridLine gridLine = new GridLine();
gridLine.BeginIndex = idx;
maxLat = Math.Min(_validLatRange.MaxValue, _endLat);
while (y <= maxLat)
{
coordTran.Geo2Prj(x, y, out prjX, out prjY);
_allPrjPoints[idx].X = (float)prjX;
_allPrjPoints[idx].Y = (float)prjY;
idx++;
y += span;
}
gridLine.SegmentCount = idx - gridLine.BeginIndex;
_gridLines.Add(gridLine);
x += span;
}
}
_lonLines = _gridLines.Count;
foreach (Range range in _validLonRanges)
{
//sample lat lines
y = _validLatRange.MinValue;
maxLat = Math.Min(_validLatRange.MaxValue, _endLat);
while (y <= _validLatRange.MaxValue)
{
GridLine gridLine = new GridLine();
gridLine.BeginIndex = idx;
x = range.MinValue;
maxLon = Math.Min(range.MaxValue, _endLon);
while (x <= maxLon)
{
coordTran.Geo2Prj(x, y, out prjX, out prjY);
_allPrjPoints[idx].X = (float)prjX;
_allPrjPoints[idx].Y = (float)prjY;
idx++;
x += span;
}
gridLine.SegmentCount = idx - gridLine.BeginIndex;
_gridLines.Add(gridLine);
y += span;
}
}
_latLines = _gridLines.Count - _lonLines;
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}