public override async void MapViewTapped(MapView mapView, MapViewInputEventArgs e, bool drawing)
{
if (!drawing)
{
var graphic = await GraphicsLayer.HitTestAsync(mapView, e.Position);
if (graphic != null)
{
OnItemTapped(int.Parse($"{graphic.Attributes[CURR_GEO]}"));
}
return;
}
MapPoint newPoint = (MapPoint)GeometryEngine.Project(e.Location, SpatialReferences.Wgs84);
if (_drawPointList.Count == 0)
{
AddGraphic(newPoint, DRAFT, MapShapeLayer.GetSymbol(GeoMarkerType.Point, GeoStatus.Hilight));
}
else
{
Polyline line = new Polyline(new MapPoint[] { _drawPointList.Last(), newPoint });
AddGraphic(line, DRAFT, MapShapeLayer.GetSymbol(GeoMarkerType.Line, GeoStatus.Hilight));
}
_drawPointList.Add(newPoint);
}
public override void Init(IGeoInfo geo, bool isCur, List <Envelope> shapeList, List <MapPoint> pointList)
{
GraphicsLayer.Graphics.Clear();
_polyList = geo.ConvertTo <ShapeGeoInfo>().Polygons ?? new Dictionary <int, Polygon>();
foreach (var poly in _polyList)
{
AddGraphic(poly.Value, CURR_GEO, $"{poly.Key}", MapShapeLayer.GetSymbol(GeoMarkerType.Fill, isCur ? GeoStatus.Normal : GeoStatus.Reference));
shapeList.Add(poly.Value.Extent);
}
}
public override bool FinishDraw(object input, ref Geometry output, ref string errMsg)
{
if (_drawPointList.Count <= 2)
{
errMsg = "Need more than 2 points to make a polygon.";
return(false);
}
DeleteGraphic(DRAFT);
_drawPointList.Add(_drawPointList.First());
Polygon polygon = new Polygon(_drawPointList.ToArray(), SpatialReferences.Wgs84);
int polygonId = (_polyList.Count > 0) ? _polyList.Keys.Max() + 1 : 1;
_polyList.Add(polygonId, polygon);
AddGraphic(polygon, CURR_GEO, $"{polygonId}", MapShapeLayer.GetSymbol(GeoMarkerType.Fill, GeoStatus.Hilight));
output = new Multipoint(_drawPointList);
return(true);
}
public override void Select(object o)
{
ClearHilight();
ChangeGraphicSymbol(CURR_GEO, o as string, MapShapeLayer.GetSymbol(GeoMarkerType.Fill, GeoStatus.Hilight));
}
public override void ClearHilight()
{
ChangeGraphicSymbol(CURR_GEO, MapShapeLayer.GetSymbol(GeoMarkerType.Fill, GeoStatus.Normal));
}