void UpdateEditPoints(Point newPoint) { if (this.editPoints.Count < 2 || this.editPoints[0].Type != EditPoint.EditPointTypes.ConnectionEditPoint || this.editPoints[this.editPoints.Count - 1].Type != EditPoint.EditPointTypes.ConnectionEditPoint) { Fx.Assert(false, "EditPoints are invalid"); return; } if (this.activeEditPoint != null) { int activeEditPointIndex = this.editPoints.IndexOf(this.activeEditPoint); EditPoint previous = (activeEditPointIndex > 0) ? this.editPoints[activeEditPointIndex - 1] : null; EditPoint next = (activeEditPointIndex < this.editPoints.Count - 1) ? this.editPoints[activeEditPointIndex + 1] : null; //Note that extra edit points are only added if we are connected to connection point if (previous != null && previous.Type == EditPoint.EditPointTypes.ConnectionEditPoint) { double slopeOfLine = DesignerGeometryHelper.SlopeOfLineSegment(previous.Location, this.activeEditPoint.Location); Orientation orientation = (Math.Abs(slopeOfLine) < 1) ? Orientation.Horizontal : Orientation.Vertical; int editPointOffset = Convert.ToInt32(DesignerGeometryHelper.DistanceBetweenPoints(previous.Location, (next != null) ? next.Location : this.activeEditPoint.Location)) / 4; if (orientation == Orientation.Horizontal) { editPointOffset *= (previous.Location.X < this.activeEditPoint.Location.X) ? 1 : -1; } else { editPointOffset *= (previous.Location.Y < this.activeEditPoint.Location.Y) ? 1 : -1; } activeEditPointIndex = this.editPoints.IndexOf(this.activeEditPoint); Point editPointLocation = (orientation == Orientation.Horizontal) ? new Point(previous.Location.X + editPointOffset, previous.Location.Y) : new Point(previous.Location.X, previous.Location.Y + editPointOffset); previous = new EditPoint(EditPoint.EditPointTypes.MultiSegmentEditPoint, editPointLocation); this.editPoints.InsertRange(activeEditPointIndex, new EditPoint[] { new EditPoint(EditPoint.EditPointTypes.MultiSegmentEditPoint, editPointLocation), previous }); } if (next != null && next.Type == EditPoint.EditPointTypes.ConnectionEditPoint) { double slopeOfLine = DesignerGeometryHelper.SlopeOfLineSegment(this.activeEditPoint.Location, next.Location); Orientation orientation = (Math.Abs(slopeOfLine) < 1) ? Orientation.Horizontal : Orientation.Vertical; int editPointOffset = Convert.ToInt32(DesignerGeometryHelper.DistanceBetweenPoints((previous != null) ? previous.Location : this.activeEditPoint.Location, next.Location)) / 4; if (orientation == Orientation.Horizontal) { editPointOffset *= (this.activeEditPoint.Location.X < next.Location.X) ? -1 : 1; } else { editPointOffset *= (this.activeEditPoint.Location.Y < next.Location.Y) ? -1 : 1; } activeEditPointIndex = this.editPoints.IndexOf(this.activeEditPoint); Point editPointLocation = (orientation == Orientation.Horizontal) ? new Point(next.Location.X + editPointOffset, next.Location.Y) : new Point(next.Location.X, next.Location.Y + editPointOffset); next = new EditPoint(EditPoint.EditPointTypes.MultiSegmentEditPoint, editPointLocation); this.editPoints.InsertRange(activeEditPointIndex + 1, new EditPoint[] { next, new EditPoint(EditPoint.EditPointTypes.MultiSegmentEditPoint, editPointLocation) }); } if (this.activeEditPoint.Type == EditPoint.EditPointTypes.ConnectionEditPoint) { Fx.Assert(this.editPoints[0].Type == EditPoint.EditPointTypes.ConnectionEditPoint, "EditPoint type is wrong."); Fx.Assert(this.editPoints[editPoints.Count - 1].Type == EditPoint.EditPointTypes.ConnectionEditPoint, "EditPoint type is wrong."); this.activeEditPoint.Location = newPoint; Fx.Assert(this.editPoints.Count > 0, "Some edit point should exist"); ConnectionPoint targetConnPt = null; Point[] points = null; Point begin = this.editPoints[0].Location; Point end = this.editPoints[this.editPoints.Count - 1].Location; if (typeof(ConnectionPointsAdorner).IsAssignableFrom(Mouse.DirectlyOver.GetType())) { ConnectionPointsAdorner connPtsAdorner = Mouse.DirectlyOver as ConnectionPointsAdorner; targetConnPt = FreeFormPanel.ConnectionPointHitTest(newPoint, connPtsAdorner); } if (activeEditPointIndex == 0) { // We are dragging the source point of a connector. ConnectionPoint destConnPt = FreeFormPanel.GetDestinationConnectionPoint(this.editedConnector); if (targetConnPt != null) { points = ConnectorRouter.Route(parentPanel, targetConnPt, destConnPt); this.activeEditPoint.Location = targetConnPt.Location; } else { points = ConnectorRouter.Route(parentPanel, begin, destConnPt); } } else { // We are dragging the destination point of a connector. ConnectionPoint srcConnPt = FreeFormPanel.GetSourceConnectionPoint(this.editedConnector); if (targetConnPt != null) { points = ConnectorRouter.Route(parentPanel, srcConnPt, targetConnPt); this.activeEditPoint.Location = targetConnPt.Location; } else { points = ConnectorRouter.Route(parentPanel, srcConnPt, end); } } //When we start editing the end point we need to clear the slate and start over List <EditPoint> newEditPoints = new List <EditPoint>(); if (points != null && points.Length > 1) { RemoveEditPoints(EditPoint.EditPointTypes.MultiSegmentEditPoint); for (int i = 1; i < points.Length - 1; ++i) { newEditPoints.Add(new EditPoint(EditPoint.EditPointTypes.MultiSegmentEditPoint, points[i])); } this.editPoints.InsertRange(1, newEditPoints.ToArray()); } } else if (this.activeEditPoint.Type == EditPoint.EditPointTypes.MultiSegmentEditPoint) { if (previous != null && previous.Type != EditPoint.EditPointTypes.ConnectionEditPoint && next != null && next.Type != EditPoint.EditPointTypes.ConnectionEditPoint) { //Update the previous point double slopeOfLine = DesignerGeometryHelper.SlopeOfLineSegment(previous.Location, this.activeEditPoint.Location); Orientation orientation = (Math.Abs(slopeOfLine) < 1) ? Orientation.Horizontal : Orientation.Vertical; previous.Location = (orientation == Orientation.Horizontal) ? new Point(previous.Location.X, newPoint.Y) : new Point(newPoint.X, previous.Location.Y); //Update the next point slopeOfLine = DesignerGeometryHelper.SlopeOfLineSegment(this.activeEditPoint.Location, next.Location); orientation = (Math.Abs(slopeOfLine) < 1) ? Orientation.Horizontal : Orientation.Vertical; next.Location = (orientation == Orientation.Horizontal) ? new Point(next.Location.X, newPoint.Y) : new Point(newPoint.X, next.Location.Y); //Update the current point this.activeEditPoint.Location = newPoint; } else { Fx.Assert(false, "Should not be here. UpdateEditPoints failed."); } } } // Remove all the redundant edit points RemoveCoincidingEditPoints(); bool validEditPoints = ValidateEditPoints(); Fx.Assert(validEditPoints, "Validating EditPoints failed."); }