private async void RequestAndStartProjecting_Click(object sender, RoutedEventArgs e)
{
// If projection is already in progress, then it could be shown on the monitor again
// Otherwise, we need to create a new view to show the presentation
if (rootPage.ProjectionViewPageControl == null)
{
// First, create a new, blank view
var thisDispatcher = Window.Current.Dispatcher;
await CoreApplication.CreateNewView().Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
// ViewLifetimeControl is a wrapper to make sure the view is closed only
// when the app is done with it
rootPage.ProjectionViewPageControl = ViewLifetimeControl.CreateForCurrentView();
// Assemble some data necessary for the new page
var initData = new ProjectionViewPageInitializationData();
initData.MainDispatcher = thisDispatcher;
initData.ProjectionViewPageControl = rootPage.ProjectionViewPageControl;
initData.MainViewId = thisViewId;
// Display the page in the view. Note that the view will not become visible
// until "StartProjectingAsync" is called
var rootFrame = new Frame();
rootFrame.Navigate(typeof(ProjectionViewPage), initData);
Window.Current.Content = rootFrame;
Window.Current.Activate();
});
}
try
{
// Start/StopViewInUse are used to signal that the app is interacting with the
// view, so it shouldn't be closed yet, even if the user loses access to it
rootPage.ProjectionViewPageControl.StartViewInUse();
// Show the view on a second display (if available) or on the primary display
Rect pickerLocation = new Rect(470.0, 0.0, 200.0, 300.0);
await ProjectionManager.RequestStartProjectingAsync(rootPage.ProjectionViewPageControl.Id, thisViewId, pickerLocation, Windows.UI.Popups.Placement.Above);
rootPage.ProjectionViewPageControl.StopViewInUse();
rootPage.NotifyUser("Projection started with success", NotifyType.StatusMessage);
}
catch (InvalidOperationException)
{
rootPage.NotifyUser("The projection view is being disposed", NotifyType.ErrorMessage);
}
}
public async Task <int> RequestProjectAsync(Type viewType, Rect?position = null)
{
int mainViewId = ApplicationView.GetForCurrentView().Id;
int?secondViewId = null;
var view = CoreApplication.CreateNewView();
await view.Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
secondViewId = ApplicationView.GetForCurrentView().Id;
var rootFrame = new Frame();
rootFrame.Navigate(viewType, mainViewId);
Window.Current.Content = rootFrame;
Window.Current.Activate();
});
if (secondViewId.HasValue)
{
var defaultPosition = new Rect(0.0, 0.0, 200.0, 200.0);
await ProjectionManager.RequestStartProjectingAsync(secondViewId.Value, mainViewId, position.HasValue?position.Value : defaultPosition);
}
return(mainViewId);
}