private void UpdatePosition()
{
GeneralTransform transform = base.AssociatedObject.TransformToVisual(this.RootElement);
Point transformOffset = MouseDragElementBehavior.GetTransformOffset(transform);
this.X = transformOffset.X;
this.Y = transformOffset.Y;
}
private void UpdatePosition(Point point)
{
if (!this.settingPosition && base.AssociatedObject != null)
{
GeneralTransform transform = base.AssociatedObject.TransformToVisual(this.RootElement);
Point transformOffset = MouseDragElementBehavior.GetTransformOffset(transform);
double x = double.IsNaN(point.X) ? 0.0 : (point.X - transformOffset.X);
double y = double.IsNaN(point.Y) ? 0.0 : (point.Y - transformOffset.Y);
this.ApplyTranslation(x, y);
}
}
private void ApplyTranslation(double x, double y)
{
if (this.ParentElement != null)
{
GeneralTransform transform = this.RootElement.TransformToVisual(this.ParentElement);
Point point = MouseDragElementBehavior.TransformAsVector(transform, x, y);
x = point.X;
y = point.Y;
if (this.ConstrainToParentBounds)
{
FrameworkElement parentElement = this.ParentElement;
Rect rect = new Rect(0.0, 0.0, parentElement.ActualWidth, parentElement.ActualHeight);
GeneralTransform generalTransform = base.AssociatedObject.TransformToVisual(parentElement);
Rect rect2 = this.ElementBounds;
rect2 = generalTransform.TransformBounds(rect2);
Rect rect3 = rect2;
rect3.X += x;
rect3.Y += y;
if (!MouseDragElementBehavior.RectContainsRect(rect, rect3))
{
if (rect3.X < rect.Left)
{
double num = rect3.X - rect.Left;
x -= num;
}
else
{
if (rect3.Right > rect.Right)
{
double num2 = rect3.Right - rect.Right;
x -= num2;
}
}
if (rect3.Y < rect.Top)
{
double num3 = rect3.Y - rect.Top;
y -= num3;
}
else
{
if (rect3.Bottom > rect.Bottom)
{
double num4 = rect3.Bottom - rect.Bottom;
y -= num4;
}
}
}
}
this.ApplyTranslationTransform(x, y);
}
}
private static void OnConstrainToParentBoundsChanged(object sender, DependencyPropertyChangedEventArgs args)
{
MouseDragElementBehavior mouseDragElementBehavior = (MouseDragElementBehavior)sender;
mouseDragElementBehavior.UpdatePosition(new Point(mouseDragElementBehavior.X, mouseDragElementBehavior.Y));
}
private static void OnYChanged(object sender, DependencyPropertyChangedEventArgs args)
{
MouseDragElementBehavior mouseDragElementBehavior = (MouseDragElementBehavior)sender;
mouseDragElementBehavior.UpdatePosition(new Point(mouseDragElementBehavior.X, (double)args.NewValue));
}
