/// <summary>Adds a back key handler for a given page. </summary>
/// <param name="page">The page. </param>
/// <param name="handler">The handler. </param>
public void Add(MtPage page, Func<object, bool> handler)
{
if (!_isEventRegistered)
{
#if WINDOWS_UAP
if (page.Frame.AutomaticBackButtonHandling)
{
SystemNavigationManager.GetForCurrentView().BackRequested += OnBackKeyPressed;
}
#else
if (_hardwareButtonsType == null)
{
_hardwareButtonsType = Type.GetType(
"Windows.Phone.UI.Input.HardwareButtons, " +
"Windows, Version=255.255.255.255, Culture=neutral, " +
"PublicKeyToken=null, ContentType=WindowsRuntime");
}
_registrationToken = EventUtilities.RegisterStaticEvent(_hardwareButtonsType, "BackPressed", OnBackKeyPressed);
#endif
_isEventRegistered = true;
}
_handlers.Insert(0, new Tuple<MtPage, Func<object, bool>>(page, handler));
}
public NavigationKeyHandler(MtPage page)
{
_page = page;
_goBackActions = new List<Func<CancelEventArgs, Task>>();
if (Windows.ApplicationModel.DesignMode.DesignModeEnabled)
return;
page.Loaded += OnPageLoaded;
page.Unloaded += OnPageUnloaded;
}
public NavigationKeyHandler(MtPage page)
{
_page = page;
_goBackActions = new List <Func <CancelEventArgs, Task> >();
if (Windows.ApplicationModel.DesignMode.DesignModeEnabled)
{
return;
}
page.Loaded += OnPageLoaded;
page.Unloaded += OnPageUnloaded;
}
/// <summary>Removes a back key pressed handler for a given page. </summary>
/// <param name="page">The page. </param>
public void Remove(MtPage page)
{
_handlers.Remove(_handlers.Single(h => h.Item1 == page));
if (_handlers.Count == 0)
{
#if WINDOWS_UAP_UNUSED
HardwareButtons.BackPressed -= OnBackKeyPressed;
#else
EventUtilities.DeregisterStaticEvent(_hardwareButtonsType, "BackPressed", _registrationToken);
#endif
_isEventRegistered = false;
}
}
/// <summary>Removes a back key pressed handler for a given page. </summary>
/// <param name="page">The page. </param>
public void Remove(MtPage page)
{
_handlers.Remove(_handlers.Single(h => h.Item1 == page));
if (_handlers.Count == 0)
{
#if WINDOWS_UAP
SystemNavigationManager.GetForCurrentView().BackRequested -= OnBackKeyPressed;
#else
EventUtilities.DeregisterStaticEvent(_hardwareButtonsType, "BackPressed", _registrationToken);
#endif
_isEventRegistered = false;
}
}
/// <summary>Removes a back key pressed handler for a given page. </summary>
/// <param name="page">The page. </param>
public void Remove(MtPage page)
{
_handlers.Remove(_handlers.Single(h => h.Item1 == page));
if (_handlers.Count == 0)
{
#if WINDOWS_UAP
SystemNavigationManager.GetForCurrentView().BackRequested -= OnBackKeyPressed;
#else
EventUtilities.DeregisterStaticEvent(_hardwareButtonsType, "BackPressed", _registrationToken);
#endif
_isEventRegistered = false;
}
}
/// <summary>Removes a back key pressed handler for a given page. </summary>
/// <param name="page">The page. </param>
public void Remove(MtPage page)
{
_handlers.Remove(_handlers.Single(h => h.Item1 == page));
if (_handlers.Count == 0)
{
#if WINDOWS_UAP_UNUSED
HardwareButtons.BackPressed -= OnBackKeyPressed;
#else
EventUtilities.DeregisterStaticEvent(_hardwareButtonsType, "BackPressed", _registrationToken);
#endif
_isEventRegistered = false;
}
}
/// <summary>Adds a back key handler for a given page. </summary>
/// <param name="page">The page. </param>
/// <param name="handler">The handler. </param>
public void Add(MtPage page, Func<object, bool> handler)
{
if (!_isEventRegistered)
{
#if WINDOWS_UAP_UNUSED
HardwareButtons.BackPressed += OnBackKeyPressed;
#else
if (_hardwareButtonsType == null)
{
_hardwareButtonsType = Type.GetType(
"Windows.Phone.UI.Input.HardwareButtons, " +
"Windows, Version=255.255.255.255, Culture=neutral, " +
"PublicKeyToken=null, ContentType=WindowsRuntime");
}
_registrationToken = EventUtilities.RegisterStaticEvent(_hardwareButtonsType, "BackPressed", OnBackKeyPressed);
#endif
_isEventRegistered = true;
}
_handlers.Insert(0, new Tuple<MtPage, Func<object, bool>>(page, handler));
}
/// <summary>Adds a back key handler for a given page. </summary>
/// <param name="page">The page. </param>
/// <param name="handler">The handler. </param>
public void Add(MtPage page, Func <object, bool> handler)
{
if (!_isEventRegistered)
{
#if WINDOWS_UAP
SystemNavigationManager.GetForCurrentView().BackRequested += OnBackKeyPressed;
#else
if (_hardwareButtonsType == null)
{
_hardwareButtonsType = Type.GetType(
"Windows.Phone.UI.Input.HardwareButtons, " +
"Windows, Version=255.255.255.255, Culture=neutral, " +
"PublicKeyToken=null, ContentType=WindowsRuntime");
}
_registrationToken = EventUtilities.RegisterStaticEvent(_hardwareButtonsType, "BackPressed", OnBackKeyPressed);
#endif
_isEventRegistered = true;
}
_handlers.Insert(0, new Tuple <MtPage, Func <object, bool> >(page, handler));
}
public PageStateHandler(MtPage page)
{
_page = page;
}
/// <summary>Registers the view model for state handling. </summary>
/// <param name="viewModel">The view model. </param>
/// <param name="page">The page. </param>
public static void RegisterViewModelForStateHandling(IStateHandlingViewModel viewModel, MtPage page)
{
page.PageStateHandler.SaveState += (sender, args) => viewModel.OnSaveState(args);
page.PageStateHandler.LoadState += (sender, args) => viewModel.OnLoadState(args);
}
public PageStateHandler(MtPage page, string pageKey)
{
_page = page;
PageKey = pageKey;
}
public PageStateHandler(MtPage page, string pageKey)
{
_page = page;
PageKey = pageKey;
}
public PageStateHandler(MtPage page)
{
_page = page;
}