public void Render(object sender, IDrawArgs drawArgs)
{
if (_bitmap == null || _coordEnvelope == null)
{
return;
}
CoordEnvelope evp = _coordEnvelope.Clone();
if (_isGeoCoord)
{
(sender as ICanvas).CoordTransform.Geo2Prj(evp);
}
double x1 = evp.MinX;
double y1 = evp.MinY;
double x2 = evp.MaxX;
double y2 = evp.MaxY;
drawArgs.QuickTransformArgs.Transform(ref x1, ref y1);
drawArgs.QuickTransformArgs.Transform(ref x2, ref y2);
/*
* 以下两句为了解决：
* 在缩放过程中因浮点取整导致边界1-2个像元没有被遮住的问题
*/
x1 -= 1;
y2 -= 1;
Graphics g = drawArgs.Graphics as Graphics;
//g.DrawImage(_bitmap,
// RectangleF.FromLTRB((float)Math.Min(x1, x2), (float)Math.Min(y1, y2), (float)Math.Max(x1, x2), (float)Math.Max(y1, y2)));
g.DrawImage(_bitmap, new PointF[] { new PointF((float)x1, (float)y2), new PointF((float)x2, (float)y2), new PointF((float)x1, (float)y1) },
new RectangleF(0, 0, _bitmap.Width, _bitmap.Height), GraphicsUnit.Pixel, _ia);
}
public void To(ILinkableViewer fromViewer, GeoDo.RSS.Core.DrawEngine.CoordEnvelope viewport)
{
foreach (ILinkableViewer v in _viewers)
{
if (!v.Equals(fromViewer))
{
v.To(viewport.Clone());
}
}
}
private void SetEnvelope()
{
GeoDo.RSS.Core.DF.CoordEnvelope evp = _dataProvider.CoordEnvelope;
switch (_dataProvider.CoordType)
{
case enumCoordType.Raster:
case enumCoordType.PrjCoord:
if (evp == null)
{
evp = new DF.CoordEnvelope(new DF.CoordPoint(0, 0), _dataProvider.Width, _dataProvider.Height);
}
_envelope = new DrawEngine.CoordEnvelope(evp.MinX, evp.MaxX, evp.MinY, evp.MaxY);
if (_dataProvider.SpatialRef != null)
{
_projectionTransform = ProjectionTransformFactory.GetProjectionTransform(SpatialReference.GetDefault(), _dataProvider.SpatialRef);
}
_canvas.CoordTransform.DataCoordType = enumDataCoordType.Prj;
break;
case enumCoordType.GeoCoord:
//这里未处理其他坐标系统//???
_projectionTransform = ProjectionTransformFactory.GetDefault();
double[] xs = new double[] { evp.MinX, evp.MaxX };
double[] ys = new double[] { evp.MinY, evp.MaxY };
_projectionTransform.Transform(xs, ys);
_envelope = new DrawEngine.CoordEnvelope(xs[0], xs[1], ys[0], ys[1]);
_canvas.CoordTransform.DataCoordType = enumDataCoordType.Geo;
break;
}
_originalEnvelope = _envelope.Clone();
_originalResolutionX = (float)(_originalEnvelope.Width / _dataProvider.Width);
_originalResolutionY = (float)(_originalEnvelope.Height / _dataProvider.Height);
//
if (_dataProvider.SpatialRef == null)
{
_canvas.CoordTransform.SpatialRefOfViewer = new SpatialReference(new GeographicCoordSystem());
}
else
{
_canvas.CoordTransform.SpatialRefOfViewer = _dataProvider.SpatialRef.Clone();
}
}
public void To(GeoDo.RSS.Core.DrawEngine.CoordEnvelope viewport)
{
if (_session.SmartWindowManager.ActiveCanvasViewer != null && _session.SmartWindowManager.ActiveCanvasViewer.IsPrimaryLinkWnd)
{
GeoDo.RSS.Core.DrawEngine.CoordEnvelope ev = viewport.Clone();
ICanvas c = _session.SmartWindowManager.ActiveCanvasViewer.Canvas;
if (c != null)
{
double prjX1 = ev.MinX, prjY1 = ev.MaxY, prjX2 = ev.MaxX, prjY2 = ev.MinY;
double geoX1, geoY1, geoX2, geoY2;
c.CoordTransform.Prj2Geo(prjX1, prjY1, out geoX1, out geoY1);
c.CoordTransform.Prj2Geo(prjX2, prjY2, out geoX2, out geoY2);
ev = new CoordEnvelope(geoX1, geoX2, geoY2, geoY1);
double lon = ev.Center.X;
double lat = ev.Center.Y;
double span = (ev.MaxX - ev.MinX) > (ev.MaxY - ev.MinY) ?
(ev.MaxX - ev.MinX) : (ev.MaxY - ev.MinY);
double alt = 6357000 * Math.Sin(span / 2 * Angle.DegreeToRadians);
EarthGoto(lat, lon, alt);
}
}
}