private static void AnimateToPosition(DependencyObject d, Rect desiredPosition)
{
Rect position = ArrangePanel.GetPosition(d);
if (double.IsNaN(position.X))
{
ArrangePanel.SetPosition(d, desiredPosition);
}
else
{
Vector vector = desiredPosition.TopLeft - position.TopLeft;
double length1 = vector.Length;
vector = desiredPosition.BottomRight - position.BottomRight;
double length2 = vector.Length;
TimeSpan timeSpan = TimeSpan.FromMilliseconds(Math.Max(length1, length2) * 1.0);
RectAnimation rectAnimation1 = new RectAnimation(position, desiredPosition, new Duration(timeSpan));
rectAnimation1.DecelerationRatio = 1.0;
RectAnimation rectAnimation2 = rectAnimation1;
if (!(d is UIElement uiElement))
{
return;
}
uiElement.BeginAnimation(ArrangePanel.PositionProperty, (AnimationTimeline)rectAnimation2);
}
}
private void DoReordering(MouseEventArgs e)
{
e.Handled = true;
Point position = e.GetPosition((IInputElement)this);
ArrangePanel.SetOrder((DependencyObject)this._draggingObject, this._strategy.GetIndex(position));
ArrangePanel.SetPosition((DependencyObject)this._draggingObject, new Rect(position + this._delta, ArrangePanel.GetPosition((DependencyObject)this._draggingObject).Size));
}
private void StartReordering(MouseEventArgs e)
{
if (e == null || !(e.OriginalSource is UIElement originalSource))
{
return;
}
this._startPosition = e.GetPosition((IInputElement)this);
this._draggingObject = this.GetMyChildOfUiElement(originalSource);
this._draggingObject.SetValue(Panel.ZIndexProperty, (object)100);
Rect position = ArrangePanel.GetPosition((DependencyObject)this._draggingObject);
this._delta = position.TopLeft - this._startPosition;
this._draggingObject.BeginAnimation(ArrangePanel.PositionProperty, (AnimationTimeline)null);
ArrangePanel.SetPosition((DependencyObject)this._draggingObject, position);
}
