private void SetupCollinearHandlesConstraint(int index, bool enforceConstraint)
{
PathFigureEditor pathFigureEditor = new PathFigureEditor(this.figure);
if (!pathFigureEditor.HasDownstreamBezierHandleNeighbor(index) || !pathFigureEditor.HasUpstreamBezierHandleNeighbor(index))
{
return;
}
Point point = pathFigureEditor.GetPoint(index);
Vector a = pathFigureEditor.GetPoint(index - 1) - point;
Vector b = pathFigureEditor.GetPoint(index + 1) - point;
if (!enforceConstraint || VectorUtilities.HaveOppositeDirections(a, b))
{
return;
}
double length1 = a.Length;
double length2 = b.Length;
if (length1 > length2)
{
a.Normalize();
b = -a * length2;
pathFigureEditor.SetPoint(index + 1, point + b);
}
else
{
b.Normalize();
Vector vector = -b * length1;
pathFigureEditor.SetPoint(index - 1, point - vector);
}
}
public static void UpdateAllPoints(PathGeometry geometry, Transform transform)
{
for (int index1 = 0; index1 < geometry.Figures.Count; ++index1)
{
PathFigure figure = geometry.Figures[index1];
PathFigureEditor pathFigureEditor = new PathFigureEditor(figure);
int index2 = 1;
if (!PathFigureUtilities.IsClosed(figure) || !PathFigureUtilities.IsCloseSegmentDegenerate(figure))
{
pathFigureEditor.SetPoint(0, transform.Transform(figure.StartPoint));
}
for (int index3 = 0; index3 < figure.Segments.Count; ++index3)
{
System.Windows.Media.PathSegment segment = figure.Segments[index3];
int pointCount = PathSegmentUtilities.GetPointCount(segment);
for (int index4 = 0; index4 < pointCount; ++index4)
{
Point point = PathSegmentUtilities.GetPoint(segment, index4);
pathFigureEditor.SetPoint(index2, transform.Transform(point));
++index2;
}
}
}
}
protected override void OnDrag(MouseDevice mouseDevice, double zoom)
{
Point viewRootCoordinates = this.GetPointInViewRootCoordinates(mouseDevice, true);
this.PathEditorTarget.BeginEditing();
Vector correspondingVector = ElementUtilities.GetCorrespondingVector(viewRootCoordinates - this.startRootPoint * this.geometryToDocument, this.geometryToDocument, this.IsShiftDown ? this.AxisConstraint : (AxisConstraint)null);
PathFigureEditor pathFigureEditor = new PathFigureEditor(this.PathEditContext.GetPathFigure(this.PathEditorTarget.PathGeometry));
if (!this.adjustLastTangent)
{
pathFigureEditor.SetPoint(this.PathEditContext.PartIndex, this.startRootPoint + correspondingVector);
}
else
{
this.LastTangent = correspondingVector;
}
this.View.AdornerLayer.InvalidateAdornerVisuals(this.EditingElement);
base.OnDrag(mouseDevice, zoom);
}
protected override void OnBegin(PathEditContext pathEditContext, MouseDevice mouseDevice)
{
BaseFrameworkElement frameworkElement = this.oldPathEditorTarget.EditingElement.GetCommonAncestor((SceneNode)this.EditingElement) as BaseFrameworkElement;
Base2DElement editingElement = this.oldPathEditorTarget.EditingElement;
Base2DElement base2Delement = (Base2DElement)this.EditingElement;
if (frameworkElement != base2Delement && !base2Delement.GetComputedTransformToElement((SceneElement)frameworkElement).HasInverse)
{
this.End();
}
else
{
int figureIndex1 = pathEditContext.FigureIndex;
int num1 = PathFigureUtilities.PointCount(this.oldPathEditContext.GetPathFigure(this.oldPathEditorTarget.PathGeometry));
if (editingElement != base2Delement)
{
this.PathEditorTarget.EndEditing(false);
figureIndex1 += this.oldPathEditorTarget.PathGeometry.Figures.Count;
List <PathElement> otherElements = new List <PathElement>();
PathElement mainElement = (PathElement)editingElement;
PathElement pathElement = (PathElement)base2Delement;
otherElements.Add(pathElement);
PathCommandHelper.MakeCompoundPath(mainElement, otherElements, this.EditTransaction);
this.UpdateEditTransaction();
this.PathEditorTarget = this.oldPathEditorTarget;
}
this.PathEditorTarget.BeginEditing();
PathGeometryEditor geometryEditor = this.PathEditorTarget.CreateGeometryEditor();
if (pathEditContext.PartIndex != 0)
{
geometryEditor.CreatePathFigureEditor(figureIndex1).Reverse();
}
geometryEditor.JoinFigure(this.oldPathEditContext.FigureIndex, figureIndex1);
int figureIndex2 = this.oldPathEditContext.FigureIndex;
if (pathEditContext.FigureIndex < this.oldPathEditContext.FigureIndex && editingElement == base2Delement)
{
--figureIndex2;
}
this.UpdateEditTransaction();
this.View.UpdateLayout();
PathFigureEditor pathFigureEditor = geometryEditor.CreatePathFigureEditor(figureIndex2);
int downstreamSegment1 = pathFigureEditor.GetLastIndexOfDownstreamSegment(num1 - 1);
if (pathFigureEditor.GetPointKind(downstreamSegment1) == PathPointKind.Cubic)
{
Vector lastTangent = this.oldPathEditorTarget.LastTangent;
pathFigureEditor.SetPoint(downstreamSegment1 - 2, pathFigureEditor.GetPoint(downstreamSegment1 - 2) + lastTangent);
}
this.PathEditorTarget.EndEditing(false);
int downstreamSegment2 = pathFigureEditor.GetLastIndexOfDownstreamSegment(num1 - 1);
this.PathEditContext = new PathEditContext(figureIndex2, downstreamSegment2);
int num2 = PathFigureUtilities.PointCount(pathFigureEditor.PathFigure);
if (pathFigureEditor.GetPointKind(num2 - 1) == PathPointKind.Cubic)
{
this.LastTangent = pathFigureEditor.GetPoint(num2 - 1) - pathFigureEditor.GetPoint(num2 - 2);
}
else
{
this.LastTangent = new Vector(0.0, 0.0);
}
this.UpdateEditTransaction();
this.zeroTangents = false;
this.PathEditorTarget.BeginEditing();
base.OnBegin(this.PathEditContext, mouseDevice);
}
}
