private void ChangeSelection(TreeViewItemViewModel selectedNode)
{
Task.Factory.StartNew(() =>
{
var target =
_nodes
.Where(x => x.Value.Item.FullName.StartsWith(selectedNode.Item.FullName))
.Where(x => x.Value.Level != selectedNode.Level);
foreach (var child in target)
{
child.Value.IsSelected = selectedNode.IsSelected;
}
Action <TreeViewItemViewModel> changeParentsCheckState = null;
changeParentsCheckState = (TreeViewItemViewModel n) =>
{
if (n.Parent == null)
{
return;
}
TreeViewItemViewModel parent;
if (!n.Parent.TryGetTarget(out parent))
{
return;
}
if (parent.Children == null)
{
return;
}
int count = parent.Children.Count;
int falseCount = parent.Children.Count(x => x.IsSelected.HasValue && !x.IsSelected.Value);
int trueCount = parent.Children.Count(x => x.IsSelected.HasValue && x.IsSelected.Value);
if (count == trueCount)
{
parent.IsSelected = true;
}
else if (count == falseCount)
{
parent.IsSelected = false;
}
else
{
parent.IsSelected = null;
}
changeParentsCheckState(parent);
};
changeParentsCheckState(selectedNode);
});
}
private void OpenDirectory()
{
foreach (var node in _nodes)
{
node.Value.Cleanup();
}
_nodes.Clear();
var dialog = new BrowseForFolder();
dialog.Options = 1;
//dialog.RootFolder = Environment.GetFolderPath(Environment.SpecialFolder.MyComputer);
dialog.Title = "フォルダを選択して下さい。";
dialog.ShowDialog();
if (string.IsNullOrEmpty(dialog.SelectedPath) ||
!Directory.Exists(dialog.SelectedPath))
{
return;
}
InputDirectoryPath = dialog.SelectedPath;
var root = new TreeViewItemViewModel();
var parent = new DirectoryInfo(InputDirectoryPath);
root.Item = parent;
_nodes[root.Item.FullName] = root;
Tree.Root = CollectionViewSource.GetDefaultView(new [] { root });
ExportTree.Root = Tree.Root;
Task.Factory.StartNew(() =>
{
foreach (var child in parent.EnumerateFileSystemInfos())
{
if ((child.Attributes & (FileAttributes.Hidden | FileAttributes.System)) > 0)
{
continue;
}
try
{
CreateTree(_nodes, child, parent);
}
catch (UnauthorizedAccessException)
{
_nodes.Remove(child.FullName);
}
}
});
}
private void CreateTree(Dictionary <string, TreeViewItemViewModel> nodes, FileSystemInfo current, FileSystemInfo parent)
{
var node = new TreeViewItemViewModel();
nodes[current.FullName] = node;
node.Item = current;
if (parent != null)
{
var parentNode = nodes[parent.FullName];
node.Parent = new WeakReference <TreeViewItemViewModel>(parentNode);
Action <TreeViewItemViewModel, TreeViewItemViewModel> add = (TreeViewItemViewModel p, TreeViewItemViewModel c) => p.Children.Add(c);
UIDispatcher.Invoke(add, DispatcherPriority.Normal, parentNode, node);
}
if (!(current is DirectoryInfo))
{
return;
}
foreach (var child in (current as DirectoryInfo).EnumerateFileSystemInfos())
{
if ((child.Attributes & (FileAttributes.Hidden | FileAttributes.System)) > 0)
{
continue;
}
try
{
CreateTree(nodes, child, current);
}
catch (UnauthorizedAccessException)
{
nodes.Remove(child.FullName);
}
}
}