ArchiveFileListView.xaml.cs

// Copyright © 2017-2026 QL-Win Contributors
//
// This file is part of QuickLook program.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

using QuickLook.Plugin.ArchiveViewer.ArchiveFile;
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;

namespace QuickLook.Plugin.ArchiveViewer.ArchiveFile;

public partial class ArchiveFileListView : UserControl, IDisposable
{
    public ArchiveFileListView()
    {
        InitializeComponent();

        treeView.MouseDoubleClick += TreeView_MouseDoubleClick;
    }

    /// <summary>
    /// Raised when the user asks to preview a file inside the archive
    /// </summary>
    public event Action<ArchiveFileEntry> PreviewRequested;

    private void TreeView_MouseDoubleClick(object sender, MouseButtonEventArgs e)
    {
        // only react to double-clicks on an item, not on the scrollbar or empty space
        var item = (e.OriginalSource as DependencyObject)?.FindAncestor<TreeViewItem>();
        if (item?.DataContext is not ArchiveFileEntry entry || entry.IsFolder)
            return;

        e.Handled = true;
        PreviewRequested?.Invoke(entry);
    }

    public void Dispose()
    {
        GC.SuppressFinalize(this);

        IconManager.ClearCache();
    }

    public void SetDataContext(object context)
    {
        treeGrid.DataContext = context;

        treeView.LayoutUpdated += (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;
        };
    }
}