private void CreateScrollbars()
{
if (Parent != null && !(Parent is AdornerDecorator) && (Parent is Grid || Parent is SimpleView || Parent is ContentControl))
{
// We need to make sure this control is directly within an adorner decorator
// so elements in the adorner layer (scroll bars) behave correctly in the Z-Order
var decorator = new AdornerDecorator
{
VerticalAlignment = VerticalAlignment,
HorizontalAlignment = HorizontalAlignment,
Margin = new Thickness(Margin.Left, Margin.Top, Margin.Right, Margin.Bottom),
Width = Width,
Height = Height
};
Grid.SetColumn(decorator, Grid.GetColumn(this));
Grid.SetRow(decorator, Grid.GetRow(this));
Grid.SetColumnSpan(decorator, Grid.GetColumnSpan(this));
Grid.SetRowSpan(decorator, Grid.GetRowSpan(this));
SimpleView.SetUIElementTitle(decorator, SimpleView.GetUIElementTitle(this));
SimpleView.SetUIElementType(decorator, SimpleView.GetUIElementType(this));
Margin = new Thickness(0d);
VerticalAlignment = VerticalAlignment.Stretch;
HorizontalAlignment = HorizontalAlignment.Stretch;
var parentPanel = Parent as Panel;
if (parentPanel != null)
{
var childItemIndex = -1;
var found = false;
foreach (var child in parentPanel.Children)
{
childItemIndex++;
if (child == this)
{
found = true;
break;
}
}
if (found)
{
parentPanel.Children.Remove(this);
parentPanel.Children.Insert(childItemIndex, decorator);
decorator.Child = this;
}
}
else
{
var parentContent = Parent as ContentControl;
if (parentContent != null)
{
parentContent.Content = null;
parentContent.Content = decorator;
decorator.Child = this;
}
}
}
if (_scrollbarsCreated)
{
return;
}
_adorner = AdornerLayer.GetAdornerLayer(this);
if (_adorner == null)
{
return;
}
_adorner.Add(new BidirectionalStackPanelScrollAdorner(this, _scrollHorizontal, _scrollVertical)
{
Visibility = Visibility.Visible
});
_scrollHorizontal.ValueChanged += (s, e) => Application.Current.Dispatcher.BeginInvoke(DispatcherPriority.ApplicationIdle, new Action(DispatchInvalidateScroll));
_scrollVertical.ValueChanged += (s, e) => Application.Current.Dispatcher.BeginInvoke(DispatcherPriority.ApplicationIdle, new Action(DispatchInvalidateScroll));
_scrollbarsCreated = true;
}