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1 | // |
2 | // App.xaml.cpp |
3 | // Implementation of the App class. |
4 | // |
5 | |
6 | #include "pch.h" |
7 | #include "MainPage.xaml.h" |
8 | |
9 | using namespace uwp; |
10 | |
11 | using namespace Platform; |
12 | using namespace Windows::ApplicationModel; |
13 | using namespace Windows::ApplicationModel::Activation; |
14 | using namespace Windows::Foundation; |
15 | using namespace Windows::Foundation::Collections; |
16 | using namespace Windows::UI::Xaml; |
17 | using namespace Windows::UI::Xaml::Controls; |
18 | using namespace Windows::UI::Xaml::Controls::Primitives; |
19 | using namespace Windows::UI::Xaml::Data; |
20 | using namespace Windows::UI::Xaml::Input; |
21 | using namespace Windows::UI::Xaml::Interop; |
22 | using namespace Windows::UI::Xaml::Media; |
23 | using namespace Windows::UI::Xaml::Navigation; |
24 | |
25 | /// <summary> |
26 | /// Initializes the singleton application object. This is the first line of authored code |
27 | /// executed, and as such is the logical equivalent of main() or WinMain(). |
28 | /// </summary> |
29 | App::App() |
30 | { |
31 | InitializeComponent(); |
32 | Suspending += ref new SuspendingEventHandler(this, &App::OnSuspending); |
33 | } |
34 | |
35 | /// <summary> |
36 | /// Invoked when the application is launched normally by the end user. Other entry points |
37 | /// will be used such as when the application is launched to open a specific file. |
38 | /// </summary> |
39 | /// <param name="theEvent">Details about the launch request and process.</param> |
40 | void App::OnLaunched(Windows::ApplicationModel::Activation::LaunchActivatedEventArgs^ theEvent) |
41 | { |
42 | #if _DEBUG |
43 | // Show graphics profiling information while debugging. |
44 | if (IsDebuggerPresent()) |
45 | { |
46 | // Display the current frame rate counters |
47 | DebugSettings->EnableFrameRateCounter = true; |
48 | } |
49 | #endif |
50 | auto rootFrame = dynamic_cast<Frame^>(Window::Current->Content); |
51 | |
52 | // Do not repeat app initialization when the Window already has content, |
53 | // just ensure that the window is active |
54 | if (rootFrame == nullptr) |
55 | { |
56 | // Create a Frame to act as the navigation context and associate it with |
57 | // a SuspensionManager key |
58 | rootFrame = ref new Frame(); |
59 | |
60 | rootFrame->NavigationFailed += ref new Windows::UI::Xaml::Navigation::NavigationFailedEventHandler(this, &App::OnNavigationFailed); |
61 | |
62 | if (theEvent->PreviousExecutionState == ApplicationExecutionState::Terminated) |
63 | { |
64 | // TODO: Restore the saved session state only when appropriate, scheduling the |
65 | // final launch steps after the restore is complete |
66 | |
67 | } |
68 | |
69 | if (theEvent->PrelaunchActivated == false) |
70 | { |
71 | if (rootFrame->Content == nullptr) |
72 | { |
73 | // When the navigation stack isn't restored navigate to the first page, |
74 | // configuring the new page by passing required information as a navigation |
75 | // parameter |
76 | rootFrame->Navigate(TypeName(MainPage::typeid), theEvent->Arguments); |
77 | } |
78 | // Place the frame in the current Window |
79 | Window::Current->Content = rootFrame; |
80 | // Ensure the current window is active |
81 | Window::Current->Activate(); |
82 | } |
83 | } |
84 | else |
85 | { |
86 | if (theEvent->PrelaunchActivated == false) |
87 | { |
88 | if (rootFrame->Content == nullptr) |
89 | { |
90 | // When the navigation stack isn't restored navigate to the first page, |
91 | // configuring the new page by passing required information as a navigation |
92 | // parameter |
93 | rootFrame->Navigate(TypeName(MainPage::typeid), theEvent->Arguments); |
94 | } |
95 | // Ensure the current window is active |
96 | Window::Current->Activate(); |
97 | } |
98 | } |
99 | } |
100 | |
101 | /// <summary> |
102 | /// Invoked when application execution is being suspended. Application state is saved |
103 | /// without knowing whether the application will be terminated or resumed with the contents |
104 | /// of memory still intact. |
105 | /// </summary> |
106 | /// <param name="theSender">The source of the suspend request.</param> |
107 | /// <param name="theEvent">Details about the suspend request.</param> |
108 | void App::OnSuspending(Object^ theSender, SuspendingEventArgs^ theEvent) |
109 | { |
110 | (void)theSender; // Unused parameter |
111 | (void)theEvent; // Unused parameter |
112 | |
113 | //TODO: Save application state and stop any background activity |
114 | } |
115 | |
116 | /// <summary> |
117 | /// Invoked when Navigation to a certain page fails |
118 | /// </summary> |
119 | /// <param name="theSender">The Frame which failed navigation</param> |
120 | /// <param name="theEvent">Details about the navigation failure</param> |
121 | void App::OnNavigationFailed(Platform::Object ^theSender, Windows::UI::Xaml::Navigation::NavigationFailedEventArgs ^theEvent) |
122 | { |
123 | throw ref new FailureException("Failed to load Page " + theEvent->SourcePageType.Name); |
124 | } |