protected override async void OnMouseUp(System.Windows.Input.MouseButtonEventArgs e)
{
if (e.ButtonState == MouseButtonState.Released)
{
if (e.ChangedButton == System.Windows.Input.MouseButton.Left)
{
e.Handled = true;
POINT clickPOINT;
GetCursorPos(out clickPOINT);
MapPoint clickMapPoint = await MappingModule.ActiveMapView.ScreenToLocationAsync(new System.Windows.Point(clickPOINT.X, clickPOINT.Y));
Envelope ext = await MappingModule.ActiveMapView.GetExtentAsync();
double searchDistance = 0.0;
await QueuingTaskFactory.StartNew(() =>
{
searchDistance = ext.Width / 2.0;
});
var targetLayer = MappingModule.ActiveTOC.SelectedLayers.OfType <FeatureLayer>().First();
ArcGIS.Core.Geometry.GeometryEngine.ProximityResult clickResult = await ComputeDistanceToGeometryAsync(clickMapPoint, targetLayer, 1, searchDistance);
var templateGroupLayer = MappingModule.ActiveMapView.Map.GetFlattenedLayers().OfType <GroupLayer>().Where(lyr => lyr.Name.Equals("Bright Map Notes")).First();
var flashLayer = templateGroupLayer.GetFlattenedLayers().OfType <FeatureLayer>().Where(lyr => lyr.Name.Equals("Bright - Point Notes")).First();
if (clickResult != null)
{
await flashLayer.AddAndFlashGeometryAsync(clickResult.Point);
}
}
base.OnMouseUp(e);
}
}
private async Task <ArcGIS.Core.Geometry.GeometryEngine.ProximityResult> ComputeDistanceToGeometryAsync(MapPoint clickPoint, FeatureLayer targetLayer, int hitNumber, double searchDistance)
{
FeatureClass featureClass = await targetLayer.GetTableAsync() as FeatureClass;
Geometry searchBuffer = null;
List <Geometry> geometryList = new List <Geometry>();
double closestDistance = double.MaxValue;
ArcGIS.Core.Geometry.GeometryEngine.ProximityResult clickResult = null;
MapPoint closestPoint = null;
bool foundFeatureAndComputedDistance = false;
await QueuingTaskFactory.StartNew(() =>
{
var classDefinition = featureClass.Definition as FeatureClassDefinition;
searchBuffer = GeometryEngine.Project(GeometryEngine.Buffer(clickPoint, searchDistance), classDefinition.SpatialReference);
SpatialQueryFilter spatialFilter = new SpatialQueryFilter()
{
FilterGeometry = searchBuffer,
SpatialRelationship = SpatialRelationship.EnvelopeIntersects
};
RowCursor featureCursor = featureClass.Search(spatialFilter, false);
while (featureCursor.MoveNext())
{
var feature = featureCursor.Current as Feature;
geometryList.Add(feature.Shape);
}
clickPoint = GeometryEngine.Project(clickPoint, classDefinition.SpatialReference) as MapPoint;
foreach (var geometry in geometryList)
{
var geoResult = GeometryEngine.NearestBoundaryPoint(geometry, clickPoint, searchDistance);
if (geoResult.Distance < closestDistance)
{
closestDistance = geoResult.Distance;
clickResult = geoResult;
foundFeatureAndComputedDistance = true;
}
}
});
if (foundFeatureAndComputedDistance)
{
DockPane dockPane = FrameworkApplication.FindDockPane("GeometrySamples_ClosestGeometryPane");
if (dockPane == null)
{
return(new ArcGIS.Core.Geometry.GeometryEngine.ProximityResult());
}
DistancePaneViewModel cgVM = dockPane as DistancePaneViewModel;
cgVM.DistanceDisplayUnit = _linearDisplayUnit;
cgVM.ClickResult = clickResult;
}
return(clickResult);
}
