private void map_MouseMove(object sender, MouseEventArgs e)
{
Map.Cursor = Cursors.Hand;
if (originPoint != null && _isMeasuring)
{
_graphicCount = GraphicsLayer.Graphics.Count;
int g = _graphicCount - 1;
MapPoint p = Map.ScreenToMap(e.GetPosition(Map));
MapPoint midpoint = new MapPoint((p.X + originPoint.X) / 2, (p.Y + originPoint.Y) / 2);
ESRI.ArcGIS.Client.Geometry.PointCollection polypoints = new ESRI.ArcGIS.Client.Geometry.PointCollection();
ESRI.ArcGIS.Client.Geometry.Polygon poly = new ESRI.ArcGIS.Client.Geometry.Polygon();
if (Type == MeasureType.Area && _points.Count > 2)
{
Graphic graphic = GraphicsLayer.Graphics[0];
poly = graphic.Geometry as ESRI.ArcGIS.Client.Geometry.Polygon;
polypoints = poly.Rings[0];
int lastPt = polypoints.Count - 1;
polypoints[lastPt] = p;
}
GraphicsLayer.Graphics[g - 2].Geometry = midpoint;
(GraphicsLayer.Graphics[g - 1].Geometry as ESRI.ArcGIS.Client.Geometry.Polyline).Paths[0][1] = p;
GraphicsLayer.Graphics[g].Geometry = midpoint;
double angle = Math.Atan2((p.X - originPoint.X), (p.Y - originPoint.Y)) / Math.PI * 180 - 90;
if (angle > 90 || angle < -90)
{
angle -= 180;
}
RotatingTextSymbol symb = GraphicsLayer.Graphics[g].Symbol as RotatingTextSymbol;
symb.Angle = angle;
double dist = Geodesic.GetSphericalDistance(originPoint, p);
double distRound = RoundToSignificantDigit(dist);
symb.Text = Convert.ToString(RoundToSignificantDigit(ConvertDistance(dist, DistanceUnits)));
GraphicsLayer.Graphics[g].Symbol = symb;
_segmentLength = distRound;
_tempTotalLength = totalLength + distRound;
RotatingTextSymbol totSym;
if (Type == MeasureType.Distance)
{
totSym = GraphicsLayer.Graphics[0].Symbol as RotatingTextSymbol;
totSym.Text = string.Format("Length Total:\n{0} {1}", RoundToSignificantDigit(ConvertDistance(_tempTotalLength, DistanceUnits)), DistanceUnits.ToString());
GraphicsLayer.Graphics[0].Symbol = totSym;
}
else
{
totSym = GraphicsLayer.Graphics[1].Symbol as RotatingTextSymbol;
if (polypoints != null && polypoints.Count > 2)
{
double lastLen = Geodesic.GetSphericalDistance(polypoints[0], polypoints[polypoints.Count - 1]);
poly = GraphicsLayer.Graphics[0].Geometry as ESRI.ArcGIS.Client.Geometry.Polygon;
MapPoint anchor = poly.Extent.GetCenter();
ESRI.ArcGIS.Client.Geometry.PointCollection temppoints = new ESRI.ArcGIS.Client.Geometry.PointCollection();
foreach (MapPoint point in poly.Rings[0])
{
temppoints.Add(point);
}
temppoints.Add(poly.Rings[0][0]);
ESRI.ArcGIS.Client.Geometry.PointCollection pts = ToKmMapPoint(temppoints);
double area = GetArea(pts);
//double area = GetArea(ToKMMapPoint(polypoints));
totSym.Text = string.Format("Area:\n{0} {1}", RoundToSignificantDigit(area), AreaUnits.ToString());
GraphicsLayer.Graphics[1].Geometry = anchor;
GraphicsLayer.Graphics[1].Symbol = totSym;
}
}
}
}
/// <summary>
/// AngleProperty property changed handler.
/// </summary>
/// <param name="d">ownerclass that changed its Angle.</param>
/// <param name="e">DependencyPropertyChangedEventArgs.</param>
private static void OnTextPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
RotatingTextSymbol dp = d as RotatingTextSymbol;
dp.OnPropertyChanged("Text");
}