internal static void SplitViewPaneHandler(EventMainPage page, SplitView rootSplitView, ToggleButton togglePaneButton) { if (rootSplitView.DisplayMode == SplitViewDisplayMode.Inline || rootSplitView.DisplayMode == SplitViewDisplayMode.Overlay) { var transform = togglePaneButton.TransformToVisual(page); var rect = transform.TransformBounds(new Rect(0, 0, togglePaneButton.ActualWidth, togglePaneButton.ActualHeight)); page.TogglePaneButtonRect = rect; } else { page.TogglePaneButtonRect = new Rect(); } }