private void HandleBringIntoView()
{
var bringIntoViewIndex = -1;
var bringIntoViewMode = BringIntoViewMode.Default;
if (_enqueueBringIntoViewRequest != null)
{
bringIntoViewMode = _enqueueBringIntoViewRequest.Mode;
var frameworkElement = _enqueueBringIntoViewRequest.ElementInternal;
bringIntoViewIndex = frameworkElement != null
? Source.GetIndexFromItem(frameworkElement)
: _enqueueBringIntoViewRequest.Index;
if (bringIntoViewIndex == -1)
{
bringIntoViewIndex = _enqueueBringIntoViewRequest.FallbackIndex;
}
}
if (bringIntoViewIndex != -1)
{
var orientation = Orientation;
var extent = Extent.AsOriented(orientation);
extent.Direct = extent.Direct.Clamp(bringIntoViewIndex + Viewport.AsOriented(orientation).Direct, double.MaxValue);
Offset = CalcBringIntoViewOffset(bringIntoViewIndex, bringIntoViewMode, Viewport, extent.Size, Offset);
}
_enqueueBringIntoViewRequest = null;
}
protected override void ExecuteScrollCommand(ScrollCommandKind command)
{
var commandOrientation = ScrollViewUtils.GetCommandOrientation(command);
var orientation = Orientation;
var orientedViewport = Viewport.AsOriented(orientation);
var orientedExtent = Extent.AsOriented(orientation);
var orientedOffset = Offset.AsOriented(orientation);
var directScrollView = new OrientedScrollView(orientation, orientedViewport.Direct, orientedExtent.Direct,
orientedOffset.Direct);
var indirectScrollView = new OrientedScrollView(orientation.Rotate(), orientedViewport.Indirect,
orientedExtent.Indirect, orientedOffset.Indirect);
directScrollView.ExecuteScrollCommand(command,
commandOrientation == orientation
? ScrollViewUtils.DefaultUnitSmallChange
: ScrollViewUtils.DefaultPixelSmallChange,
commandOrientation == orientation
? ScrollViewUtils.DefaultUnitWheelChange
: ScrollViewUtils.DefaultPixelWheelChange);
indirectScrollView.ExecuteScrollCommand(command,
commandOrientation != orientation
? ScrollViewUtils.DefaultUnitSmallChange
: ScrollViewUtils.DefaultPixelSmallChange,
commandOrientation != orientation
? ScrollViewUtils.DefaultUnitWheelChange
: ScrollViewUtils.DefaultPixelWheelChange);
orientedOffset.Direct = directScrollView.Offset;
orientedOffset.Indirect = indirectScrollView.Offset;
Offset = orientedOffset.Vector;
}