Initial property for MediaSlideshow

Author: neon-nyan

BackgroundTest/CustomControl/MediaSlideshow/MediaSlideshow.Events.cs

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+using Microsoft.UI.Xaml;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace BackgroundTest.CustomControl.MediaSlideshow;
+
+public partial class MediaSlideshow
+{
+    #region Events
+
+    private static void MediaItems_OnChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+    {
+        throw new NotImplementedException();
+    }
+
+    #endregion
+}

BackgroundTest/CustomControl/MediaSlideshow/MediaSlideshow.Properties.cs

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+using Microsoft.UI.Xaml;
+using System;
+using System.IO;
+using Windows.Storage.Streams;
+
+namespace BackgroundTest.CustomControl.MediaSlideshow;
+
+public partial class MediaSlideshow
+{
+    #region Properties
+
+    /// <summary>
+    /// List of media sources. This can be in forms of <see cref="Uri"/>, <see cref="string"/> (Either for URL or Local Path), <see cref="Stream"/> or <see cref="IRandomAccessStream"/>.
+    /// </summary>
+    public ManagedObservableList<object> MediaItems
+    {
+        get => (ManagedObservableList<object>)GetValue(MediaItemsProperty);
+        set => SetValue(MediaItemsProperty, value);
+    }
+
+    /// <summary>
+    /// The index of current media being displayed.
+    /// </summary>
+    public int CurrentMediaIndex
+    {
+        get => (int)GetValue(CurrentMediaIndexProperty);
+        set => SetValue(CurrentMediaIndexProperty, value);
+    }
+
+    /// <summary>
+    /// Determine how long the duration for the slideshow to switch into the next media.
+    /// </summary>
+    public double SlideshowDuration
+    {
+        get => (double)GetValue(SlideshowDurationProperty);
+        set => SetValue(SlideshowDurationProperty, value);
+    }
+
+    /// <summary>
+    /// Override <see cref="SlideshowDuration"/> and use video's own duration instead.
+    /// </summary>
+    public bool OverrideSlideshowDurationOnVideo
+    {
+        get => (bool)GetValue(OverrideSlideshowDurationOnVideoProperty);
+        set => SetValue(OverrideSlideshowDurationOnVideoProperty, value);
+    }
+
+    /// <summary>
+    /// Enable parallax effect on the media canvas.
+    /// </summary>
+    public bool EnableParallaxEffect
+    {
+        get => (bool)GetValue(EnableParallaxEffectProperty);
+        set => SetValue(EnableParallaxEffectProperty, value);
+    }
+
+    #endregion
+
+    #region Dependency Properties
+
+    public static readonly DependencyProperty MediaItemsProperty =
+        DependencyProperty.Register(nameof(MediaItems), typeof(ManagedObservableList<object>), typeof(MediaSlideshow),
+                                    new PropertyMetadata(new ManagedObservableList<object>(), MediaItems_OnChanged));
+
+    public static readonly DependencyProperty CurrentMediaIndexProperty =
+        DependencyProperty.Register(nameof(CurrentMediaIndex), typeof(int), typeof(MediaSlideshow),
+                                    new PropertyMetadata(0));
+
+    public static readonly DependencyProperty SlideshowDurationProperty =
+        DependencyProperty.Register(nameof(SlideshowDuration), typeof(double), typeof(MediaSlideshow),
+                                    new PropertyMetadata(0));
+
+    public static readonly DependencyProperty OverrideSlideshowDurationOnVideoProperty =
+        DependencyProperty.Register(nameof(OverrideSlideshowDurationOnVideo), typeof(bool), typeof(MediaSlideshow),
+                                    new PropertyMetadata(true));
+
+    public static readonly DependencyProperty EnableParallaxEffectProperty =
+        DependencyProperty.Register(nameof(EnableParallaxEffect), typeof(bool), typeof(MediaSlideshow),
+                                    new PropertyMetadata(false));
+
+    #endregion
+}

BackgroundTest/CustomControl/MediaSlideshow/MediaSlideshow.cs

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+using Microsoft.UI.Xaml.Controls;
+
+namespace BackgroundTest.CustomControl.MediaSlideshow;
+
+public partial class MediaSlideshow : Control;