/// <summary>
/// Sets <see cref="AppViewBackButtonVisibility"/> to <see cref="SystemNavigationManager.AppViewBackButtonVisibility"/>
/// </summary>
/// <param name="page">The <see cref="Page"/></param>
/// <param name="value"><see cref="AppViewBackButtonVisibility"/></param>
public static void SetBackButtonVisibility(Page page, AppViewBackButtonVisibility value)
{
var systemNavigationManager = GetSystemNavigationManager();
if (systemNavigationManager != null)
{
systemNavigationManager.AppViewBackButtonVisibility = value;
}
}
/// <summary>
/// Управляет видимостью кнопки Back в панели заголовка окна.
/// </summary>
private void UpdateBackButtonVisibility()
{
AppViewBackButtonVisibility visibility = AppViewBackButtonVisibility.Collapsed;
if (Frame.CanGoBack)
{
visibility = AppViewBackButtonVisibility.Visible;
}
SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility = visibility;
}
partial void OnAppViewBackButtonVisibility(AppViewBackButtonVisibility visibility)
{
switch (visibility)
{
case AppViewBackButtonVisibility.Visible:
WebAssemblyRuntime.InvokeJS("Windows.UI.Core.SystemNavigationManager.current.enable();");
break;
case AppViewBackButtonVisibility.Collapsed:
default: // Disabled value is not present in currently supported UWP API, but should be mapped to collapsed
WebAssemblyRuntime.InvokeJS("Windows.UI.Core.SystemNavigationManager.current.disable();");
break;
}
}
private void NewLocation_Click(object sender, RoutedEventArgs e)
{
AddNewButton.Icon = new SymbolIcon(Symbol.Forward);
AddNewButton.Label = "Continue";
AddNewButton.Click -= NewLocation_Click;
AddNewButton.Click += ContinueAddingNewLocation;
AddNewButton.Visibility = Visibility.Collapsed;
LocationMarkerDetails.Visibility = Visibility.Collapsed;
MapControl.MapTapped += PinLocationOnMap;
_previousAppViewBackButtonVisibility =
SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility;
SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility = AppViewBackButtonVisibility.Visible;
SystemNavigationManager.GetForCurrentView().BackRequested += CancelNewLocation;
}
public MainPage()
{
this.InitializeComponent();
AppViewBackButtonVisibility m = new AppViewBackButtonVisibility();
m = AppViewBackButtonVisibility.Visible;
List <Man> dates = new List <Man>()
{
new Man {
Name = "222"
},
new Man {
Name = "2222"
}
};
comb.ItemsSource = dates;
}
//暂时全盘接管导航
public static void RegSingleHandler(EventHandler <BackRequestedEventArgs> singleHandler)
{
var view = SystemNavigationManager.GetForCurrentView();
if (singleHandlers.Count <= 0)
{
lastSingleHandler = null;
}
else
{
lastSingleHandler = singleHandlers.Last().Key;
}
if (lastSingleHandler == null)
{
var list = new List <EventHandler <BackRequestedEventArgs> >();
list.AddRange(Handlers);
singleHandlers.Add(singleHandler, list);
foreach (var item in Handlers)
{
view.BackRequested -= item;
}
view.BackRequested += singleHandler;
HandlerIndexs.Add(singleHandler);
orinalVisibility = SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility;
SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility = AppViewBackButtonVisibility.Visible;
}
else
{
var list = new List <EventHandler <BackRequestedEventArgs> >();
list.Add(lastSingleHandler);
singleHandlers.Add(singleHandler, list);
view.BackRequested -= lastSingleHandler;
view.BackRequested += singleHandler;
HandlerIndexs.Add(singleHandler);
}
}
/// <summary>
/// Sets the back button visibility based on the current visual state and selected item
/// </summary>
private void SetBackButtonVisibility(MasterDetailsViewState previousState)
{
if (DesignMode.DesignModeEnabled)
{
return;
}
if (ViewState == MasterDetailsViewState.Details)
{
var navigationManager = SystemNavigationManager.GetForCurrentView();
_previousBackButtonVisibility = navigationManager.AppViewBackButtonVisibility;
navigationManager.AppViewBackButtonVisibility = AppViewBackButtonVisibility.Visible;
}
else if (previousState == MasterDetailsViewState.Details)
{
// Make sure we show the back button if the stack can navigate back
SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility = _previousBackButtonVisibility;
}
}
private void StartTitleBarAnimation(AppViewBackButtonVisibility buttonVisibility)
{
switch (buttonVisibility)
{
case AppViewBackButtonVisibility.Disabled:
case AppViewBackButtonVisibility.Visible:
if (IsTitleBarTextBlockInBegun)
{
goto default;
}
TitleBarTextBlockIn.Begin();
IsTitleBarTextBlockInBegun = true;
break;
case AppViewBackButtonVisibility.Collapsed:
TitleBarTextBlockOut.Begin();
IsTitleBarTextBlockInBegun = false;
break;
default:
break;
}
}
public static void SetBackButtonVisibility(Page page, AppViewBackButtonVisibility value)
{
ApplicationViewExtensions.SetBackButtonVisibility(page, value);
}
public BackButtonVisibilityChangedEventArgs(AppViewBackButtonVisibility visibility)
{
BackButtonVisibility = visibility;
}
