private void ComputeSegmentParameter()
{
PathSegmentAdorner pathSegmentAdorner = (PathSegmentAdorner)this.pathPartAdorner;
Point position = this.ActiveView.Artboard.CalculateTransformFromArtboardToContent().Value.Transform(this.MouseDevice.GetPosition((IInputElement)this.ActiveView.Artboard));
PathFigureEditor pathFigureEditor = new PathFigureEditor(pathSegmentAdorner.PathGeometry.Figures[pathSegmentAdorner.FigureIndex]);
Matrix transformMatrix = pathSegmentAdorner.PathAdornerSet.GetTransformMatrix((IViewObject)this.ActiveView.HitTestRoot);
Point closestPoint;
double distanceSquared;
this.pathSegmentParameter = pathFigureEditor.GetClosestPointOfUpstreamSegment(pathSegmentAdorner.LastPointIndex, position, transformMatrix, Tolerances.CurveFlatteningTolerance, out closestPoint, out distanceSquared);
}
protected override void OnBegin(PathEditContext pathEditContext, MouseDevice mouseDevice)
{
PerformanceUtility.MeasurePerformanceUntilRender(PerformanceEvent.EditPath);
Point viewRootCoordinates = this.GetPointInViewRootCoordinates(mouseDevice, false);
PathFigureEditor pathFigureEditor = new PathFigureEditor(pathEditContext.GetPathFigure(this.Path), this.PathEditorTarget.PathDiffChangeList, pathEditContext.FigureIndex);
Matrix elementTransformToRoot = this.EditingElementTransformToRoot;
int partIndex = pathEditContext.PartIndex;
Point closestPoint;
double distanceSquared;
double ofUpstreamSegment = pathFigureEditor.GetClosestPointOfUpstreamSegment(partIndex, viewRootCoordinates, elementTransformToRoot, Tolerances.CurveFlatteningTolerance, out closestPoint, out distanceSquared);
this.InsertPoint(pathEditContext, ofUpstreamSegment);
base.OnBegin(pathEditContext, mouseDevice);
this.End();
}
