Mon premier slide show sous Win8
Bonjour,
Je débute dans le dev sur mobile pour Winsows 8. J'ai suivi ce tuto (plutôt bien fait).
Je l'ai fait en C#/XAML. Je suis toutes les instructions jusqu'au point 7. Quand je lance l'application, j'ai bien une image affichée, mais je ne trouve pas comment passer l'image suivante, "slider"...
Est-ce que qq a déjà fait ce tuto ou aurait une idée?
Voici le code C#
Code:
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| using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.Core;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;
using Windows.UI.Xaml.Media.Imaging;
using Windows.Media.PlayTo;
using Windows.UI;
using Windows.Storage;
using Windows.Storage.Streams;
// The Blank Page item template is documented at http://go.microsoft.com/fwlink/?LinkId=234238
namespace SlideShow
{
/// <summary>
/// An empty page that can be used on its own or navigated to within a Frame.
/// </summary>
public sealed partial class MainPage : Page
{
private PlayToManager ptm = null;
private DispatcherTimer timer = null;
private IReadOnlyList<StorageFile> imageList = null; // Liste des images a afficher
private int imageIdx = -1; // index de l'image courante
private Image currentPlayer = null; // afficheur d'image courant
private bool isStreaming; // True if Streaming
private CoreDispatcher messageDispatcher = Window.Current.CoreWindow.Dispatcher;
public MainPage()
{
this.InitializeComponent();
}
/// <summary>
/// Invoked when this page is about to be displayed in a Frame.
/// </summary>
/// <param name="e">Event data that describes how this page was reached. The Parameter
/// property is typically used to configure the page.</param>
protected override void OnNavigatedTo(NavigationEventArgs e)
{
this.ptm = PlayToManager.GetForCurrentView();
this.ptm.SourceRequested += this.SourceRequested;
this.ptm.SourceSelected += this.SourceSelected;
this.timer = new DispatcherTimer();
this.timer.Interval = new TimeSpan(0, 0, 5);
this.timer.Tick += TimeoutElapsed;
this.StartSlideShow();
}
/// <summary>
/// Récupère la liste des images et démarre le slideShow
/// </summary>
async private void StartSlideShow()
{
var resultsLibrary = await Windows.Storage.KnownFolders.PicturesLibrary.GetFilesAsync();
this.imageList = resultsLibrary;
if (imageList.Count > 0)
{
SetImageSource(this.ImagePlayer1, this.GetNextImage());
}
else
{
MessageBlock.Text = "No image found in the Pictures Library";
}
}
/// <summary>
/// Affiche une image dans une vue
/// </summary>
/// <param name="image">vue ou l'image est affichée</param>
/// <param name="imageFile">file image à afficher</param>
async private void SetImageSource(Image imagePlayer, StorageFile imageFile)
{
// ouvert de l'image dans un object bitmap
IRandomAccessStream imageStream = await imageFile.OpenAsync(FileAccessMode.Read);
BitmapImage imageBitmap = new BitmapImage();
imageBitmap.SetSource(imageStream);
// Set l'image au player
imagePlayer.Source = imageBitmap;
}
/// <summary>
/// Récupère l'image suivante
/// </summary>
/// <returns></returns>
private StorageFile GetNextImage()
{
this.imageIdx++;
if (this.imageIdx >= this.imageList.Count)
{
this.imageIdx = 0;
}
return imageList[this.imageIdx];
}
private void ShowImage(Image imagePlayer)
{
this.currentPlayer = imagePlayer;
Image otherImagePlayer = (imagePlayer.Name == "ImagePlayer1") ? this.ImagePlayer2 : this.ImagePlayer1;
// Met en cache la prochaine image
SetImageSource(otherImagePlayer, GetNextImage());
if (this.isStreaming)
{
try
{
otherImagePlayer.PlayToSource.PlayNext();
}
catch (Exception )
{
}
}
else
{
otherImagePlayer.Visibility = Visibility.Collapsed;
imagePlayer.Visibility = Visibility.Visible;
}
this.currentPlayer = otherImagePlayer;
this.timer.Start();
}
/// <summary>
/// Pass image source to play to
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
async private void SourceRequested(PlayToManager sender, PlayToSourceRequestedEventArgs e)
{
e.SourceRequest.SetSource(currentPlayer.PlayToSource);
// Set Play To Source next properties
ImagePlayer1.PlayToSource.Next = ImagePlayer2.PlayToSource;
ImagePlayer2.PlayToSource.Next = ImagePlayer1.PlayToSource;
await messageDispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
// Stop slide show
timer.Stop();
});
}
/// <summary>
/// Set up Streamin if device selected
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
async private void SourceSelected(PlayToManager sender, PlayToSourceSelectedEventArgs e)
{
WriteMessageText("Streaming...");
this.isStreaming = true;
await this.messageDispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
//hide local image players
this.ImagePlayer1.Visibility = Windows.UI.Xaml.Visibility.Collapsed;
this.ImagePlayer2.Visibility = Windows.UI.Xaml.Visibility.Collapsed;
// start slide show again with the next image
timer.Start();
});
}
async private void WriteMessageText(String message, bool isOverwrite = false)
{
await messageDispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
if (isOverwrite)
{
this.MessageBlock.Text = message;
}
else
{
this.MessageBlock.Text += message;
}
});
}
private void TimeoutElapsed(Object sender, Object e)
{
this.ShowImage(currentPlayer);
}
}
} |
et le XAML
Code:
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| <Page
x:Class="SlideShow.MainPage"
IsTabStop="false"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:SlideShow"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d">
<Grid Background="{StaticResource ApplicationPageBackgroundThemeBrush}">
<StackPanel>
<TextBlock x:Name="MessageBlock" Width="300"/>
</StackPanel>
<StackPanel>
<Image x:Name="ImagePlayer1" Height="400" Width="600"/>
<Image x:Name="ImagePlayer2" Height="400" Width="600"/>
</StackPanel>
</Grid>
</Page> |