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QuickLook.Plugin/QuickLook.Plugin.ArchiveViewer/ArchiveFileListView.xaml.cs

@@ -0,0 +1,43 @@
+using System;
+using System.Windows.Controls;
+
+namespace QuickLook.Plugin.ArchiveViewer
+{
+    /// <summary>
+    ///     Interaction logic for ArchiveFileListView.xaml
+    /// </summary>
+    public partial class ArchiveFileListView : UserControl, IDisposable
+    {
+        public ArchiveFileListView()
+        {
+            InitializeComponent();
+        }
+
+        public void Dispose()
+        {
+            IconManager.ClearCache();
+        }
+
+        public void SetDataContext(object context)
+        {
+            treeGrid.DataContext = context;
+
+            treeView.Loaded += (sender, e) =>
+            {
+                // return when empty
+                if (treeView.Items.Count == 0)
+                    return;
+
+                // return when there are more than one root nodes
+                if (treeView.Items.Count > 1)
+                    return;
+
+                var root = (TreeViewItem) treeView.ItemContainerGenerator.ContainerFromItem(treeView.Items[0]);
+                if (root == null)
+                    return;
+
+                root.IsExpanded = true;
+            };
+        }
+    }
+}