partial void InitializePartial()
{
#if __SKIA__
_strategy = CompositorScrollStrategy.Instance;
#elif __MACOS__
_strategy = TransformScrollStrategy.Instance;
#endif
_strategy.Initialize(this);
// Mouse wheel support
PointerWheelChanged += ScrollContentPresenter_PointerWheelChanged;
// Touch scroll support
ManipulationMode = ManipulationModes.TranslateX | ManipulationModes.TranslateY; // Updated in PrepareTouchScroll!
ManipulationStarting += PrepareTouchScroll;
ManipulationDelta += UpdateTouchScroll;
ManipulationCompleted += CompleteTouchScroll;
}
public ScrollContentPresenter()
{
#if __SKIA__
_strategy = CompositorScrollStrategy.Instance;
#elif __MACOS__
_strategy = TransformScrollStrategy.Instance;
#endif
_strategy.Initialize(this);
// Mouse wheel support
PointerWheelChanged += ScrollContentPresenter_PointerWheelChanged;
// Touch scroll support
ManipulationMode = ManipulationModes.TranslateX | ManipulationModes.TranslateY; // Updated in PrepareTouchScroll!
ManipulationStarting += PrepareTouchScroll;
ManipulationDelta += UpdateTouchScroll;
ManipulationCompleted += CompleteTouchScroll;
// On Skia and macOS (as UWP), the Scrolling is managed by the ScrollContentPresenter, not the ScrollViewer.
// Note: This as direct consequences in UIElement.GetTransform and VisualTreeHelper.SearchDownForTopMostElementAt
RegisterAsScrollPort(this);
}