Extended Properties for PhotoAlbum Items

Author: lukeblevins

Files/App.xaml.cs

@@ -107,10 +107,17 @@ public static void Clipboard_ContentChanged(object sender, object e)
         {
             try
             {
-                DataPackageView packageView = Clipboard.GetContent();
-                if (packageView.Contains(StandardDataFormats.StorageItems) && App.CurrentInstance.CurrentPageType != typeof(YourHome))
+                if (App.CurrentInstance != null)
                 {
-                    App.PS.isEnabled = true;
+                    DataPackageView packageView = Clipboard.GetContent();
+                    if (packageView.Contains(StandardDataFormats.StorageItems) && App.CurrentInstance.CurrentPageType != typeof(YourHome))
+                    {
+                        App.PS.isEnabled = true;
+                    }
+                    else
+                    {
+                        App.PS.isEnabled = false;
+                    }
                 }
                 else
                 {

Files/Filesystem/ItemViewModel.cs

@@ -543,7 +543,7 @@ internal set
             }
         }
 
-        public async void LoadExtendedItemProperties(ListedItem item)
+        public async void LoadExtendedItemProperties(ListedItem item, uint thumbnailSize = 20)
         {
             if (!item.ItemPropertiesInitialized)
             {
@@ -558,7 +558,7 @@ public async void LoadExtendedItemProperties(ListedItem item)
                         {
                             matchingItem.FileType = matchingStorageItem.DisplayType;
                             matchingItem.FolderRelativeId = matchingStorageItem.FolderRelativeId;
-                            var Thumbnail = await matchingStorageItem.GetThumbnailAsync(ThumbnailMode.ListView, 20, ThumbnailOptions.UseCurrentScale);
+                            var Thumbnail = await matchingStorageItem.GetThumbnailAsync(ThumbnailMode.ListView, thumbnailSize, ThumbnailOptions.UseCurrentScale);
                             if (Thumbnail != null)
                             {
                                 matchingItem.FileImg = icon;

Files/UserControls/PhotoAlbum.xaml

@@ -276,6 +276,8 @@
             <GridView.ItemTemplate>
                 <DataTemplate x:DataType="local2:ListedItem">
                     <Grid
+                        DataContext="{x:Bind}"
+                        EffectiveViewportChanged="Grid_EffectiveViewportChanged"
                         Width="125"
                         Height="Auto"
                         Margin="0,0,0,0"
@@ -300,8 +302,8 @@
                                 Padding="12"
                                 HorizontalAlignment="Stretch"
                                 VerticalAlignment="Stretch"
-                                Visibility="{x:Bind FileIconVis}">
-                                <Image Source="{x:Bind FileImg}" Stretch="Uniform" />
+                                Visibility="{x:Bind FileIconVis, Mode=OneWay}">
+                                <Image Source="{x:Bind FileImg, Mode=OneWay}" Stretch="Uniform" />
                             </Grid>
                             <Image
                                 HorizontalAlignment="Stretch"
@@ -318,7 +320,7 @@
                             <Grid
                                 HorizontalAlignment="Stretch"
                                 VerticalAlignment="Stretch"
-                                Visibility="{x:Bind EmptyImgVis}">
+                                Visibility="{x:Bind EmptyImgVis, Mode=OneWay}">
                                 <Grid HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
                                     <FontIcon
                                         FontFamily="Segoe MDL2 Assets"

Files/UserControls/PhotoAlbum.xaml.cs

@@ -6,6 +6,7 @@
 using Interaction = Files.Interacts.Interaction;
 using Windows.UI.Core;
 using Files.Controls;
+using System;
 
 namespace Files
 {
@@ -160,5 +161,18 @@ protected override void Page_CharacterReceived(CoreWindow sender, CharacterRecei
                 }
             }
         }
+
+        private async void Grid_EffectiveViewportChanged(FrameworkElement sender, EffectiveViewportChangedEventArgs args)
+        {
+            if (sender.DataContext != null && (!(sender.DataContext as ListedItem).ItemPropertiesInitialized) && (args.BringIntoViewDistanceX < sender.ActualHeight))
+            {
+                await Window.Current.CoreWindow.Dispatcher.RunIdleAsync((e) =>
+                {
+                    App.CurrentInstance.ViewModel.LoadExtendedItemProperties(sender.DataContext as ListedItem, 80);
+                    (sender.DataContext as ListedItem).ItemPropertiesInitialized = true;
+                    //sender.EffectiveViewportChanged -= Icon_EffectiveViewportChanged;
+                });
+            }
+        }
     }
 }