1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
//
// App.xaml.cpp
// Implementation of the App class.
//
#include "pch.h"
#include "MainPage.xaml.h"
using namespace PhoneTutorial;
using namespace Platform;
using namespace Windows::ApplicationModel;
using namespace Windows::ApplicationModel::Activation;
using namespace Windows::Foundation;
using namespace Windows::Foundation::Collections;
using namespace Windows::UI::Xaml;
using namespace Windows::UI::Xaml::Controls;
using namespace Windows::UI::Xaml::Controls::Primitives;
using namespace Windows::UI::Xaml::Data;
using namespace Windows::UI::Xaml::Input;
using namespace Windows::UI::Xaml::Interop;
using namespace Windows::UI::Xaml::Media;
using namespace Windows::UI::Xaml::Media::Animation;
using namespace Windows::UI::Xaml::Navigation;
// The Blank Application template is documented at http://go.microsoft.com/fwlink/?LinkID=391641
/// <summary>
/// Initializes the singleton application object. This is the first line of authored code
/// executed, and as such is the logical equivalent of main() or WinMain().
/// </summary>
App::App()
{
InitializeComponent();
Suspending += ref new SuspendingEventHandler(this, &App::OnSuspending);
}
/// <summary>
/// Invoked when the application is launched normally by the end user. Other entry points
/// will be used when the application is launched to open a specific file, to display
/// search results, and so forth.
/// </summary>
/// <param name="e">Details about the launch request and process.</param>
void App::OnLaunched(LaunchActivatedEventArgs^ e)
{
#if _DEBUG
if (IsDebuggerPresent())
{
DebugSettings->EnableFrameRateCounter = true;
}
#endif
auto rootFrame = dynamic_cast<Frame^>(Window::Current->Content);
// Do not repeat app initialization when the Window already has content,
// just ensure that the window is active.
if (rootFrame == nullptr)
{
// Create a Frame to act as the navigation context and associate it with
// a SuspensionManager key
rootFrame = ref new Frame();
// TODO: Change this value to a cache size that is appropriate for your application.
rootFrame->CacheSize = 1;
if (e->PreviousExecutionState == ApplicationExecutionState::Terminated)
{
// TODO: Restore the saved session state only when appropriate, scheduling the
// final launch steps after the restore is complete.
}
// Place the frame in the current Window
Window::Current->Content = rootFrame;
}
if (rootFrame->Content == nullptr)
{
// Removes the turnstile navigation for startup.
if (rootFrame->ContentTransitions != nullptr)
{
_transitions = ref new TransitionCollection();
for (auto transition : rootFrame->ContentTransitions)
{
_transitions->Append(transition);
}
}
rootFrame->ContentTransitions = nullptr;
_firstNavigatedToken = rootFrame->Navigated += ref new NavigatedEventHandler(this, &App::RootFrame_FirstNavigated);
// When the navigation stack isn't restored navigate to the first page,
// configuring the new page by passing required information as a navigation
// parameter.
if (!rootFrame->Navigate(MainPage::typeid, e->Arguments))
{
throw ref new FailureException("Failed to create initial page");
}
}
// Ensure the current window is active
Window::Current->Activate();
}
/// <summary>
/// Restores the content transitions after the app has launched.
/// </summary>
void App::RootFrame_FirstNavigated(Object^ sender, NavigationEventArgs^ e)
{
auto rootFrame = safe_cast<Frame^>(sender);
TransitionCollection^ newTransitions;
if (_transitions == nullptr)
{
newTransitions = ref new TransitionCollection();
newTransitions->Append(ref new NavigationThemeTransition());
}
else
{
newTransitions = _transitions;
}
rootFrame->ContentTransitions = newTransitions;
rootFrame->Navigated -= _firstNavigatedToken;
}
/// <summary>
/// Invoked when application execution is being suspended. Application state is saved
/// without knowing whether the application will be terminated or resumed with the contents
/// of memory still intact.
/// </summary>
void App::OnSuspending(Object^ sender, SuspendingEventArgs^ e)
{
(void) sender; // Unused parameter
(void) e; // Unused parameter
// TODO: Save application state and stop any background activity
}