namespace Xamarin.Forms.Platform.WinRT { public partial class NavigationPageRenderer { void UpdateShowTitle() { if (Device.Idiom == TargetIdiom.Phone && _parentTabbedPage != null) ((ITitleProvider)this).ShowTitle = false; else ((ITitleProvider)this).ShowTitle = true; } static object GetDefaultColor() { return Windows.UI.Xaml.Application.Current.Resources["ApplicationPageBackgroundThemeBrush"]; } void UpdateBackButton() { bool showBackButton = Element.InternalChildren.Count > 1 && NavigationPage.GetHasBackButton(_currentPage); _container.ShowBackButton = showBackButton; } void UpdateToolbarPlacement() { // Currently we don't support toolbar (CommandBar) placement on Windows 8.1 } void UpdateTitleOnParents() { if (Element == null) return; ITitleProvider render = null; if (_parentTabbedPage != null) { render = Platform.GetRenderer(_parentTabbedPage) as ITitleProvider; if (render != null) render.ShowTitle = (_parentTabbedPage.CurrentPage == Element) && NavigationPage.GetHasNavigationBar(_currentPage); } if (_parentMasterDetailPage != null) { render = Platform.GetRenderer(_parentMasterDetailPage) as ITitleProvider; if (render != null) render.ShowTitle = (_parentMasterDetailPage.Detail == Element) && NavigationPage.GetHasNavigationBar(_currentPage); } if (render != null && render.ShowTitle) { render.Title = _currentPage.Title; render.BarBackgroundBrush = GetBarBackgroundBrush(); render.BarForegroundBrush = GetBarForegroundBrush(); } } } }