private void OnMouseDragStart(object sender, MouseDragEventArgs e)
{
Point position = e.GetPosition(this);
int index = this.CurrentPage - this.PagePosition(this.CurrentPage);
if (((this.Orientation == System.Windows.Controls.Orientation.Horizontal) && (position.X > (base.RenderSize.Width / 2.0))) || ((this.Orientation == null) && (position.Y > (base.RenderSize.Height / 2.0))))
{
index++;
}
this._dragged = base.ItemContainerGenerator.ContainerFromIndex(index) as BookItem;
if (this._dragged != null)
{
BookItem item = this.Back(this._dragged);
if (item == null)
{
this._dragged = null;
}
else
{
this.InstantUndoFold();
this._dragged.TransitionFront = false;
item.TransitionFront = true;
this._dragged.DragStart = item.DragStart = this._dragged.DragCurrent = item.DragCurrent = new Vector2(position) / base.RenderSize;
this.SortPages(this.PagePosition(index) == 1);
this.BeginRendering();
if (this.DragPageStarted != null)
{
this.DragPageStarted(this, EventArgs.Empty);
}
}
}
}
private void OnMouseDragEnd(object sender, MouseDragEventArgs e)
{
if (this._dragged != null)
{
BookItem item = this.Back(this._dragged);
Vector2 dragStart = this._dragged.DragStart;
Vector2 vector2 = new Vector2(e.GetPosition(this)) / base.RenderSize;
Vector2 vector3 = new Vector2(0.5, 0.5);
if (((this.Orientation == System.Windows.Controls.Orientation.Horizontal) && (Math.Sign((double)(vector2.X - vector3.X)) != Math.Sign((double)(this._dragged.DragStart.X - vector3.X)))) || ((this.Orientation == null) && (Math.Sign((double)(vector2.Y - vector3.Y)) != Math.Sign((double)(this._dragged.DragStart.Y - vector3.Y)))))
{
dragStart = VectorHelper.Symmetry(new Size(1.0, 1.0), item.Direction, dragStart);
dragStart = VectorHelper.Flip(new Size(1.0, 1.0), this._dragged.Direction, dragStart);
this.CurrentPage = base.ItemContainerGenerator.IndexFromContainer(item);
}
BookItem backItem = this.Back(this._dragged);
if (LinearTransition(this._dragged, backItem, (double)0.0, dragStart))
{
this.BeginRendering();
}
this._dragged = null;
if (this.DragPageFinished != null)
{
this.DragPageFinished(this, new BookDragPageFinishedEventArgs(this.CurrentPage));
}
}
}
private void OnMouseDragMove(object sender, MouseDragEventArgs e)
{
if (this._dragged != null)
{
this.Back(this._dragged).DragCurrent = this._dragged.DragCurrent = new Vector2(e.GetPosition(this)) / base.RenderSize;
this.BeginRendering();
}
}