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;
}
private Vector CalcBringIntoViewOffset(int index, BringIntoViewMode mode, Size viewport, Size extent, Vector offset)
{
if (index < 0 || index >= ItemsCount)
{
return(offset);
}
var orientation = Orientation;
var orientedViewPort = viewport.AsOriented(orientation);
var orientedExtent = extent.AsOriented(orientation);
var orientedOffset = offset.AsOriented(orientation);
var orientedViewer = new OrientedScrollView(orientation, orientedViewPort.Direct, orientedExtent.Direct,
orientedOffset.Direct);
orientedViewer.Offset = orientedViewer.Offset - index > 0.0 || mode == BringIntoViewMode.Top
? index
: index - orientedViewer.Viewport + 1.0;
orientedOffset.Direct = orientedViewer.Offset;
return(orientedOffset.Vector);
}
