/// <summary>
/// Initializes a new instance of <see cref="NavigationFrame"/>
/// </summary>
public NavigationFrame()
{
this.BackStack = new List <PageStackEntry>();
this.ForwardStack = new List <PageStackEntry>();
this.Unloaded += NavigationFrame_Unloaded;
Application.Current.Activated += Current_Activated;
Application.Current.Deactivated += Current_Deactivated;
Application.Current.MainWindow.SizeChanged += Current_SizeChanged;
Application.Current.MainWindow.Closed += Current_Closed;
this.InputBindings.Add(new KeyBinding(new RelayCommand(async() => await this.GoBack(NavigationType.BackButton)), Key.Back, ModifierKeys.None));
this.currentViewOrientation = MonitorInfo.GetCurrentOrientation();
}
/// <summary>
/// When overridden in a derived class, returns a <see cref="DataTemplate"/> based on custom logic.
/// </summary>
/// <param name="item">The data object for which to select the template.</param>
/// <param name="container">The data-bound object.</param>
/// <returns>Returns a <see cref="DataTemplate"/> or null. The default value is null.</returns>
public override DataTemplate SelectTemplate(object item, DependencyObject container)
{
if (item == null)
{
return(base.SelectTemplate(item, container));
}
var defaultDataTemplateKey = "View_" + item.GetType().Name;
var specializedDataTemplateKey = defaultDataTemplateKey;
if (Application.Current.Resources.Contains(specializedDataTemplateKey))
{
return(Application.Current.Resources[specializedDataTemplateKey] as DataTemplate);
}
specializedDataTemplateKey = defaultDataTemplateKey;
var orientation = MonitorInfo.GetCurrentOrientation();
if (orientation == ViewOrientation.Landscape)
{
specializedDataTemplateKey += "_Landscape";
}
else if (orientation == ViewOrientation.Portrait)
{
specializedDataTemplateKey += "_Portrait";
}
// Example: x:Key="View_MainViewModel_Landscape"
if (Application.Current.Resources.Contains(specializedDataTemplateKey))
{
return(Application.Current.Resources[specializedDataTemplateKey] as DataTemplate);
}
if (Application.Current.Resources.Contains(defaultDataTemplateKey))
{
return(Application.Current.Resources[defaultDataTemplateKey] as DataTemplate);
}
return(base.SelectTemplate(item, container));
}
