BetterExplorer.MainWindow.btnPreviewPane_CheckChanged C# (CSharp) Méthode

    private void btnPreviewPane_CheckChanged(object sender, RoutedEventArgs e) {
      if (isOnLoad) {
      } else if (e.RoutedEvent.Name == "Checked") {
        this.clPreview.Width = new GridLength((double)this.PreviewPaneWidth);
        this.clPreviewSplitter.Width = new GridLength(1);
        var selectedItem = _ShellListView.SelectedItems.FirstOrDefault();
        if (selectedItem != null && selectedItem.IsFileSystem && _ShellListView.GetSelectedCount() == 1 && !selectedItem.IsFolder) {
          this.Previewer.FileName = selectedItem.ParsingName;
        }

        Utilities.SetRegistryValue("PreviewPaneEnabled", 1);
        this.IsPreviewPaneEnabled = true;
      } else {
        this.clPreview.Width = new GridLength(0);
        this.clPreviewSplitter.Width = new GridLength(0);
        this.Previewer.FileName = null;
        Utilities.SetRegistryValue("PreviewPaneEnabled", 0);
        this.IsPreviewPaneEnabled = false;
      }
    }