private PointShape GetSnappingPoint(Vertex originVertex, Feature affectedFeature, bool preventSameVertex = true)
{
PolygonShape affectedPolygon = affectedFeature.GetShape() as PolygonShape;
Collection <PointShape> tmpSnappingPoints = new Collection <PointShape>();
if (editOverlay != null && snappingLayers.Count != 0)
{
//we only snaps to selected features when the selected features are from the EditTargetLayer
IEnumerable <FeatureLayer> currentSnappingLayers = snappingLayers;
if (editOverlay.SnappingLayers.Any(snappingLayer => snappingLayer == editOverlay.EditTargetLayer))
{
currentSnappingLayers = currentSnappingLayers.Concat(new FeatureLayer[] { editOverlay.EditShapesLayer });
}
foreach (var snappingLayer in currentSnappingLayers)
{
lock (snappingLayer)
{
if (!snappingLayer.IsOpen)
{
snappingLayer.Open();
}
var boundingBox = MapArguments.CurrentExtent;
var screenWidth = MapArguments.ActualWidth;
Feature snappingFeature = null;
try
{
SnappingAdapter calc = SnappingAdapter.Convert(snappingDistance, snappingDistanceUnit, MapArguments, originVertex);
snappingFeature = snappingLayer.QueryTools.
GetFeaturesWithinDistanceOf(new Feature(originVertex), MapArguments.MapUnit, calc.DistanceUnit, calc.Distance, ReturningColumnsType.NoColumns).FirstOrDefault(f => f.Id != affectedFeature.Id);
}
catch { }
BaseShape snappingShape = null;
if (snappingFeature != null && (snappingShape = snappingFeature.GetShape()) != null)
{
SnappingAdapter calc = SnappingAdapter.Convert(snappingDistance, snappingDistanceUnit, MapArguments, originVertex);
PointShape snappingPoint = GisEditorEditInteractiveOverlay.GetSnappingPoint(snappingShape, new PointShape(originVertex), MapArguments.MapUnit, calc.Distance, calc.DistanceUnit);
if (preventSameVertex && (affectedPolygon != null && !affectedPolygon.OuterRing.Vertices.Any(v => v.X == snappingPoint.X && v.Y == snappingPoint.Y)))
{
return(snappingPoint);
}
else
{
return(snappingPoint);
}
}
}
}
}
PointShape originPoint = new PointShape(originVertex);
return(originPoint);
}
private Vertex GetClosestVertex(List <Vertex> vertices, PointShape point)
{
Vertex result = vertices.FirstOrDefault();
if (vertices.Count > 0)
{
result = vertices.OrderBy(v => (v.X - point.X) * (v.X - point.X) + (v.Y - point.Y) * (v.Y - point.Y)).First();
}
if (result != default(Vertex))
{
double distanceInMeter = point.GetDistanceTo(new PointShape(result), MapArguments.MapUnit, DistanceUnit.Meter);
SnappingAdapter calc = SnappingAdapter.Convert(SnappingDistance, SnappingDistanceUnit, MapArguments, point);
double radiusInMeter = Conversion.ConvertMeasureUnits(calc.Distance, calc.DistanceUnit, DistanceUnit.Meter);
if (distanceInMeter > radiusInMeter)
{
result = new Vertex(point);
}
}
return(result);
}
protected override InteractiveResult MouseMoveCore(InteractionArguments interactionArguments)
{
if (isShiftKeyDown)
{
var circle = OverlayCanvas.Children.OfType <System.Windows.Shapes.Ellipse>().FirstOrDefault();
if (circle != null)
{
OverlayCanvas.Children.Remove(circle);
}
}
if (IsDirty && TrackMode != TrackMode.None)
{
CollectionVertices(interactionArguments);
}
UpdateArguments(interactionArguments);
if (TrackMode != TrackMode.None &&
MouseDownCount < 1 &&
SnappingLayers.Count > 0)
{
lock (OverlayCanvas.Children)
{
Vertex currentPosition = new Vertex(interactionArguments.WorldX, interactionArguments.WorldY);
var snappingCircle = OverlayCanvas.Children.OfType <System.Windows.Shapes.Ellipse>().FirstOrDefault();
if (snappingCircle == null)
{
snappingCircle = new System.Windows.Shapes.Ellipse();
snappingCircle.IsHitTestVisible = false;
snappingCircle.HorizontalAlignment = System.Windows.HorizontalAlignment.Left;
snappingCircle.VerticalAlignment = System.Windows.VerticalAlignment.Top;
snappingCircle.Stroke = new SolidColorBrush(Colors.Black);
snappingCircle.StrokeThickness = 1;
OverlayCanvas.Children.Add(snappingCircle);
}
var snappingDistance = SnappingDistance;
var snappingDistanceUnit = SnappingDistanceUnit;
var snappingScreenPoint = ExtentHelper.ToScreenCoordinate(MapArguments.CurrentExtent, currentPosition.X, currentPosition.Y, (float)MapArguments.ActualWidth, (float)MapArguments.ActualHeight);
try
{
SnappingAdapter calc = SnappingAdapter.Convert(snappingDistance, snappingDistanceUnit, MapArguments, currentPosition);
var snappingArea = new PointShape(currentPosition.X, currentPosition.Y)
.Buffer(calc.Distance, MapArguments.MapUnit, calc.DistanceUnit)
.GetBoundingBox();
var snappingScreenSize = Math.Max(snappingArea.Width, snappingArea.Height) / MapArguments.CurrentResolution;
snappingCircle.Width = snappingScreenSize;
snappingCircle.Height = snappingScreenSize;
snappingCircle.Margin = new System.Windows.Thickness(snappingScreenPoint.X - snappingScreenSize * .5, snappingScreenPoint.Y - snappingScreenSize * .5, 0, 0);
}
catch
{ }
}
}
else
{
lock (OverlayCanvas.Children)
{
var circle = OverlayCanvas.Children.OfType <System.Windows.Shapes.Ellipse>().FirstOrDefault();
if (circle != null)
{
OverlayCanvas.Children.Remove(circle);
}
}
}
var interactiveResult = base.MouseMoveCore(interactionArguments);
return(interactiveResult);
}
protected override void OnMouseMoved(MouseMovedTrackInteractiveOverlayEventArgs e)
{
base.OnMouseMoved(e);
var trackShape = GetTrackingShape();
if (!isShiftKeyDown && trackShape != null && (TrackMode == TrackMode.Polygon || TrackMode == TrackMode.Line) &&
editOverlay != null && editOverlay.SnappingLayers.Count > 0)
{
lock (OverlayCanvas.Children)
{
var snappingCircle = OverlayCanvas.Children.OfType <System.Windows.Shapes.Ellipse>().FirstOrDefault();
if (snappingCircle == null)
{
snappingCircle = new System.Windows.Shapes.Ellipse();
snappingCircle.IsHitTestVisible = false;
snappingCircle.HorizontalAlignment = System.Windows.HorizontalAlignment.Left;
snappingCircle.VerticalAlignment = System.Windows.VerticalAlignment.Top;
snappingCircle.Stroke = new SolidColorBrush(Colors.Black);
snappingCircle.StrokeThickness = 1;
OverlayCanvas.Children.Add(snappingCircle);
}
var snappingDistance = editOverlay.SnappingDistance;
var snappingDistanceUnit = editOverlay.SnappingDistanceUnit;
var snappingScreenPoint = ExtentHelper.ToScreenCoordinate(MapArguments.CurrentExtent, e.MovedVertex.X, e.MovedVertex.Y, (float)MapArguments.ActualWidth, (float)MapArguments.ActualHeight);
try
{
SnappingAdapter calc = SnappingAdapter.Convert(snappingDistance, snappingDistanceUnit, MapArguments, e.MovedVertex);
var snappingArea = new PointShape(e.MovedVertex.X, e.MovedVertex.Y)
.Buffer(calc.Distance, editOverlay.MapArguments.MapUnit, calc.DistanceUnit)
.GetBoundingBox();
var snappingScreenSize = Math.Max(snappingArea.Width, snappingArea.Height) / MapArguments.CurrentResolution;
snappingCircle.Width = snappingScreenSize;
snappingCircle.Height = snappingScreenSize;
snappingCircle.Margin = new System.Windows.Thickness(snappingScreenPoint.X - snappingScreenSize * .5, snappingScreenPoint.Y - snappingScreenSize * .5, 0, 0);
}
catch
{ }
}
//PointShape snappedPoint = GetSnappingPoint(e.MovedVertex, e.AffectedFeature);
//if (snappedPoint != null)
//{
// e.MovedVertex = new Vertex(snappedPoint);
// lock (OverlayCanvas.Children)
// {
// var snappingCircle = OverlayCanvas.Children.OfType<System.Windows.Shapes.Ellipse>().FirstOrDefault();
// if (snappingCircle == null)
// {
// snappingCircle = new System.Windows.Shapes.Ellipse();
// snappingCircle.IsHitTestVisible = false;
// snappingCircle.HorizontalAlignment = System.Windows.HorizontalAlignment.Left;
// snappingCircle.VerticalAlignment = System.Windows.VerticalAlignment.Top;
// snappingCircle.Stroke = new SolidColorBrush(Colors.Black);
// snappingCircle.StrokeThickness = 1;
// OverlayCanvas.Children.Add(snappingCircle);
// }
// var snappingDistance = editOverlay.SnappingDistance;
// var snappingDistanceUnit = editOverlay.SnappingDistanceUnit;
// var snappingScreenPoint = ExtentHelper.ToScreenCoordinate(MapArguments.CurrentExtent, snappedPoint, (float)MapArguments.ActualWidth, (float)MapArguments.ActualHeight);
// SnappingAdapter calc = SnappingAdapter.Convert(snappingDistance, snappingDistanceUnit, MapArguments, e.MovedVertex);
// var snappingArea = snappedPoint.Buffer(calc.Distance, editOverlay.MapArguments.MapUnit, calc.DistanceUnit).GetBoundingBox();
// var snappingScreenSize = Math.Max(snappingArea.Width, snappingArea.Height) / MapArguments.CurrentResolution;
// snappingCircle.Width = snappingScreenSize;
// snappingCircle.Height = snappingScreenSize;
// snappingCircle.Margin = new System.Windows.Thickness(snappingScreenPoint.X - snappingScreenSize * .5, snappingScreenPoint.Y - snappingScreenSize * .5, 0, 0);
// }
//}
}
}