public void UpdateBackButton(bool canGoBack, bool canGoForward = false)
{
switch (Settings.ShellBackButtonPreference)
{
case ShellBackButtonPreferences.AlwaysShowInShell when(!Settings.ShellBackButtonVisible):
Settings.ShellBackButtonVisible = true;
BackButtonUpdated?.Invoke(null, EventArgs.Empty);
break;
case ShellBackButtonPreferences.AutoShowInShell when(!Settings.ShellBackButtonVisible):
Settings.ShellBackButtonVisible = canGoBack;
BackButtonUpdated?.Invoke(null, EventArgs.Empty);
break;
case ShellBackButtonPreferences.NeverShowInShell when(Settings.ShellBackButtonVisible):
Settings.ShellBackButtonVisible = false;
BackButtonUpdated?.Invoke(null, EventArgs.Empty);
break;
default:
Settings.ShellBackButtonVisible = false;
BackButtonUpdated?.Invoke(null, EventArgs.Empty);
break;
}
}
public void UpdateBackButton(bool canGoBack, bool canGoForward = false)
{
// show the shell back only if there is anywhere to go in the default frame
SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility =
(Settings.ShellBackButtonVisible && (canGoBack || Settings.ForceShowShellBackButton))
? AppViewBackButtonVisibility.Visible
: AppViewBackButtonVisibility.Collapsed;
BackButtonUpdated?.Invoke(null, EventArgs.Empty);
}
public GestureService(IMessengerService messengerService)
{
_keyService2 = new KeyboardService() as IKeyboardService2;
InitKeyServiceEvents();
_backService2 = new BackButtonService(_keyService2 as IKeyboardService) as IBackButtonService2;
_backService2.BackButtonUpdated += (s, e) => BackButtonUpdated?.Invoke(s, e);
InitBackServiceEvents();
_messenger = messengerService;
}