protected override void OnDrag(MouseDevice mouseDevice, double zoom)
{
Point point = PathFigureUtilities.GetPoint(this.PathEditContext.GetPathFigure(this.Path), this.PathEditContext.PartIndex);
Point point1 = this.geometryToDocument.Transform(point);
Point viewRootCoordinates = this.GetPointInViewRootCoordinates(mouseDevice, true);
Vector vector = viewRootCoordinates - point1;
Vector correspondingVector = ElementUtilities.GetCorrespondingVector(vector, this.geometryToDocument, this.IsShiftDown ? this.AxisConstraint : (AxisConstraint)null);
if (this.hasMoved || Tolerances.HaveMoved(point1, viewRootCoordinates, zoom))
{
this.hasMoved = true;
PathGeometry path = this.Path;
int figureIndex = this.PathEditContext.FigureIndex;
int partIndex = this.PathEditContext.PartIndex;
PathGeometryEditor pathGeometryEditor = this.BeginEditing();
PathFigureEditor pathFigureEditor = new PathFigureEditor(path.Figures[figureIndex]);
if (partIndex > 0 || PathFigureUtilities.IsClosed(pathFigureEditor.PathFigure))
{
pathGeometryEditor.SetPoint(figureIndex, partIndex - 1, point - correspondingVector);
}
if (pathFigureEditor.GetLastIndexOfDownstreamSegment(partIndex) != partIndex)
{
pathGeometryEditor.SetPoint(figureIndex, partIndex + 1, point + correspondingVector);
}
if (partIndex == PathFigureUtilities.PointCount(pathFigureEditor.PathFigure) - 1 && PathFigureUtilities.IsOpen(pathFigureEditor.PathFigure))
{
this.LastTangent = vector;
}
this.PathEditorTarget.AddCriticalEdit();
}
base.OnDrag(mouseDevice, zoom);
}
protected override bool OnDrag(Point dragStartPosition, Point dragCurrentPosition, bool scrollNow)
{
switch (this.ActiveAdorner.Kind)
{
case RadialGradientAdornerKind.GradientOriginPoint:
this.actionString = StringTable.UndoUnitRadialGradientOrigin;
if (!this.HasMouseMovedAfterDown)
{
this.CopyPrimaryBrushToSelection();
}
Point point = this.initialCenterInBrush;
if (Tolerances.HaveMoved(dragCurrentPosition, this.initialCenterInDocument, this.ActiveView.Zoom))
{
Point positionInBrush = this.ActiveAdorner.InverseTransformPoint(dragCurrentPosition * this.initialContextToElementMatrix, true) * this.brushToRootMatrix;
BrushTransformBehavior.OffsetDragPoint(ref positionInBrush, this.initialCenterInBrush * this.brushToRootMatrix, this.dragOffset, 0.0);
point = RoundingHelper.RoundPosition(positionInBrush * this.rootToBrushMatrix);
}
if (this.ActiveAdorner.GradientOriginPoint != point)
{
this.SetBrushValue(RadialGradientBrushNode.GradientOriginProperty, (object)point);
this.UpdateEditTransaction();
break;
}
break;
case RadialGradientAdornerKind.RadiusPoint:
this.actionString = StringTable.UndoUnitScaleRadialGradient;
if (!this.HasMouseMovedAfterDown)
{
this.CopyPrimaryBrushToSelection();
this.radiusX = (double)this.GetBrushValue(RadialGradientBrushNode.RadiusXProperty);
this.radiusY = (double)this.GetBrushValue(RadialGradientBrushNode.RadiusYProperty);
if (Math.Abs(this.radiusX) < 0.01)
{
this.radiusX = 0.01;
}
if (Math.Abs(this.radiusY) < 0.01)
{
this.radiusY = 0.01;
}
}
Vector perpendicular;
double num1 = GradientStopBehavior.VectorProjection(this.ActiveAdorner.BrushCenter * this.brushToRootMatrix, this.initialPointerPosition, dragCurrentPosition, 0.0, out perpendicular);
double num2 = RoundingHelper.RoundLength(this.radiusX * num1);
double num3 = RoundingHelper.RoundLength(this.radiusY * num1);
this.SetBrushValue(RadialGradientBrushNode.RadiusXProperty, (object)num2);
this.SetBrushValue(RadialGradientBrushNode.RadiusYProperty, (object)num3);
this.UpdateEditTransaction();
break;
}
this.ActiveView.EnsureVisible((IAdorner)this.ActiveAdorner, scrollNow);
return(true);
}
private void ScopeElement_MouseMove(object sender, MouseEventArgs args)
{
if (this.ActiveBehavior == null)
{
return;
}
if ((Keyboard.Modifiers & ModifierKeys.Alt) != ModifierKeys.None)
{
this.consumeAltKey = true;
}
Point position = args.GetPosition((IInputElement)this.scopeElement);
if (position == this.lastDragPosition)
{
return;
}
this.lastDragPosition = position;
FrameworkElement rootElement = this.RootElement;
if (rootElement == null)
{
return;
}
GeneralTransform generalTransform = this.scopeElement.TransformToDescendant((Visual)rootElement);
if (generalTransform == null)
{
return;
}
Point point = position * VectorUtilities.GetMatrixFromTransform(generalTransform);
if (this.IsButtonDown && this.buttonDownHandled)
{
if (!this.IsDragging && !Tolerances.HaveMoved(this.dragStartPosition, point, this.view.Zoom))
{
return;
}
this.isDragging = true;
this.dragCurrentPosition = point;
args.Handled = this.ActiveBehavior.HandleDrag(this.dragStartPosition, this.dragCurrentPosition);
}
else
{
args.Handled = this.ActiveBehavior.HandleHover(point);
}
}
