protected override void OnDrag(MouseDevice mouseDevice, double zoom)
{
if (this.IsActive)
{
PathGeometryEditor pathGeometryEditor = this.BeginEditing();
PathFigureEditor pathFigureEditor = new PathFigureEditor(this.PathEditContext.GetPathFigure(this.Path));
int figureIndex = this.PathEditContext.FigureIndex;
int partIndex = this.PathEditContext.PartIndex;
int ofUpstreamSegment = pathFigureEditor.GetFirstIndexOfUpstreamSegment(partIndex);
if (!this.hasDragged)
{
Point point1 = pathFigureEditor.GetPoint(ofUpstreamSegment);
Point point2 = pathFigureEditor.GetPoint(partIndex);
if (VectorUtilities.ArePathPointsVeryClose(point2, pathFigureEditor.GetPoint(ofUpstreamSegment + 2)) && VectorUtilities.ArePathPointsVeryClose(point1, pathFigureEditor.GetPoint(ofUpstreamSegment + 1)))
{
pathGeometryEditor.SetPoint(figureIndex, ofUpstreamSegment + 1, VectorUtilities.WeightedAverage(point1, point2, 1.0 / 3.0));
pathGeometryEditor.SetPoint(figureIndex, ofUpstreamSegment + 2, VectorUtilities.WeightedAverage(point1, point2, 2.0 / 3.0));
this.initialFirstCubicHandle = pathFigureEditor.GetPoint(ofUpstreamSegment + 1);
this.initialSecondCubicHandle = pathFigureEditor.GetPoint(ofUpstreamSegment + 2);
}
this.hasDragged = true;
}
Vector correspondingVector = ElementUtilities.GetCorrespondingVector((this.GetPointInViewRootCoordinates(mouseDevice, false) - this.initialPointerPosition) * this.damping, this.geometryToDocument, this.IsShiftDown ? this.AxisConstraint : (AxisConstraint)null);
Vector vector1 = correspondingVector * this.firstHandleCoef;
Vector vector2 = correspondingVector * this.secondHandleCoef;
pathGeometryEditor.SetPoint(figureIndex, ofUpstreamSegment + 1, this.initialFirstCubicHandle + vector1);
pathGeometryEditor.SetPoint(figureIndex, ofUpstreamSegment + 2, this.initialSecondCubicHandle + vector2);
}
base.OnDrag(mouseDevice, zoom);
}
protected override void OnEnd()
{
if (!this.hasDragged)
{
PathFigureEditor pathFigureEditor = new PathFigureEditor(this.PathEditContext.GetPathFigure(this.Path));
int partIndex = this.PathEditContext.PartIndex;
int ofUpstreamSegment = pathFigureEditor.GetFirstIndexOfUpstreamSegment(partIndex);
if (!VectorUtilities.ArePathPointsVeryClose(pathFigureEditor.GetPoint(ofUpstreamSegment), pathFigureEditor.GetPoint(ofUpstreamSegment + 1)) || !VectorUtilities.ArePathPointsVeryClose(pathFigureEditor.GetPoint(partIndex), pathFigureEditor.GetPoint(ofUpstreamSegment + 2)))
{
PathGeometryEditor pathGeometryEditor = this.BeginEditing();
pathGeometryEditor.SetPoint(this.PathEditContext.FigureIndex, ofUpstreamSegment + 2, pathFigureEditor.GetPoint(partIndex));
pathGeometryEditor.SetPoint(this.PathEditContext.FigureIndex, ofUpstreamSegment + 1, pathFigureEditor.GetPoint(ofUpstreamSegment));
}
}
base.OnEnd();
}
