private BackgroundTaskDeferral _deferral; // Used to keep task alive
async public void Run(IBackgroundTaskInstance taskInstance)
{
//cost
var cost = BackgroundWorkCost.CurrentBackgroundWorkCost;
if (cost == BackgroundWorkCostValue.High)
{
return;
}
//handle cancelation if needed
var cancel = new CancellationTokenSource();
taskInstance.Canceled += (s, e) =>
{
cancel.Cancel();
cancel.Dispose();
};
//get deferral
_deferral = taskInstance.GetDeferral();
try
{
//progress
var result = await UserSettings.ChangeWallpaperAsync();
taskInstance.Progress = result;
}
catch (Exception ex)
{
_deferral.Complete();
}
}
private async Task HandleChangeWallpaper(VoiceCommandServiceConnection connection, VoiceCommandUserMessage user_message)
{
//copy images to appdata
var local_folder = ApplicationData.Current.LocalFolder;
var install_path = Package.Current.InstalledLocation;
var media_path = await install_path.GetFolderAsync("media\\images");
var images = await media_path.GetFilesAsync();
foreach (var image in images)
{
try
{
await local_folder.GetFileAsync(image.Name);
continue;
}
catch { }
await image.CopyAsync(local_folder, image.Name, ReplaceExisting);
}
//change wallpaper and prepare response back to user
var result = await UserSettings.ChangeWallpaperAsync();
user_message.SpokenMessage = "Your wallpaper was modified, do you want me to change the lock screen as well?";
var backup_message = new VoiceCommandUserMessage
{
SpokenMessage = "Change your lock screen",
};
var response = VoiceCommandResponse.CreateResponseForPrompt(user_message, backup_message);
var confirm_result = await connection.RequestConfirmationAsync(response);
if (confirm_result.Confirmed)
{
await UserSettings.ChangeLockScreenAsync();
user_message.SpokenMessage = "Your lock screen was also modified.";
response = VoiceCommandResponse.CreateResponse(user_message);
await connection.ReportSuccessAsync(response);
}
else
{
user_message.SpokenMessage = "okay, you're all set then";
response = VoiceCommandResponse.CreateResponse(user_message);
await connection.ReportSuccessAsync(response);
}
}
public LandingPage()
{
this.InitializeComponent();
this.Loaded += LandingPage_Loaded;
if (ApplicationHostPage.Host != null)
{
ApplicationHostPage.Host.GeoLocationChanged += Host_GeoLocationChanged;
ApplicationHostPage.Host.AttendaceChanged += Host_AttendaceChanged;
}
img_banner.SetImage("ms-appx:///media/images/club1.jpg");
img_banner.PointerPressed += Img_banner_PointerPressed;
Feature = App.State.NextEvent.Feature;
image_banner_menu = new PopupMenu();
var task_name = "should-have-been-there";
var previous_task_list = BackgroundTaskRegistration.AllTasks.Values;
var reg_task = previous_task_list.Where(i => i.Name == task_name).FirstOrDefault();
image_banner_menu.Commands.Add(new UICommand($"{(reg_task == null ? "Start" : "Stop")} wallpaper switcher", async(ui_command) =>
{
previous_task_list = BackgroundTaskRegistration.AllTasks.Values;
var registered = previous_task_list.Where(i => i.Name == task_name).FirstOrDefault();
if (registered == null)
{
var local_folder = Windows.Storage.ApplicationData.Current.LocalFolder;
var file = await local_folder.CreateFileAsync("marker.txt", OpenIfExists);
await file.WriteTextAsync("1");
await ApplicationHostPage.Host.StartBackgroundTaskAsync(() =>
{
var task = new BackgroundTaskBuilder();
task.Name = task_name;
task.TaskEntryPoint = typeof(BMX.BackgroundTasks.WallpaperSwitcherTask).ToString();
TimeTrigger timer = new TimeTrigger(20, false);
task.SetTrigger(timer);
registered = task.Register();
registered.Progress += async(s, args) =>
{
await this.Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
ApplicationView.GetForCurrentView().Title = $"Showing Image {args.Progress}");
};
ui_command.Label = "Stop wallpaper switcher";
}, "Cant do this now");
}
else
{
//unregister if button is clicked again
registered.Unregister(true);
ui_command.Label = "Start wallpaper switcher";
}
}));
image_banner_menu.Commands.Add(new UICommand("Next Wallpaper", async(ui_command) =>
{
await UserSettings.ChangeWallpaperAsync();
}));
image_banner_menu.Commands.Add(new UICommand("Next Lock Screen", async(ui_command) =>
{
await UserSettings.ChangeLockScreenAsync();
}));
//initializes the background audio task
BackgroundMediaPlayer.MessageReceivedFromBackground += BackgroundMessageRecieved;
_media_control = SystemMediaTransportControls.GetForCurrentView();
_media_control.ButtonPressed += _media_control_ButtonPressed;
_media_control.IsPreviousEnabled = true;
_media_control.IsNextEnabled = true;
}
