private void TreeView_Expanded(object sender, RoutedEventArgs e)
{
TreeViewItem currentTreeNode = sender as TreeViewItem;
if (currentTreeNode == null)
{
return;
}
if (currentTreeNode.ItemsSource == null)
{
return;
}
DirInfo parentDirectory = currentTreeNode.Header as DirInfo;
if (parentDirectory == null)
{
return;
}
foreach (DirInfo d in currentTreeNode.ItemsSource)
{
if (myViewModel.CurrentDirectory.Path.Equals(d.Path))
{
d.IsSelected = true;
d.IsExpanded = true;
break;
}
}
e.Handled = true;
}
/// <summary>
///
/// </summary>
/// <param name="curDir"></param>
public void ExpandToCurrentNode(DirInfo curDir)
{
//expand the current selected node in tree
//if this is an ancestor of the directory we want to navigate or "My Computer" current node
if (CurrentTreeItem != null && (curDir.Path.Contains(CurrentTreeItem.Path) ||
CurrentTreeItem.Path == UserInterfaceStrings.FileSystem_MyComputer))
{
// expand the current node
// If the current node is already expanded then first collapse it n then expand it
CurrentTreeItem.IsExpanded = false;
CurrentTreeItem.IsExpanded = true;
}
}
/// <summary>
/// ctor
/// </summary>
/// <param name="evm"></param>
public FileExplorerViewModel(ExplorerWindowViewModel evm) : base(null)
{
_evm = evm;
//create a node for "my computer"
// this will be the root for the file system tree
DirInfo rootNode = new DirInfo(UserInterfaceStrings.FileSystem_MyComputer);
rootNode.Path = UserInterfaceStrings.FileSystem_MyComputer;
_evm.CurrentDirectory = rootNode; //make root node as the current directory
SystemDirectorySource = new List <DirInfo> {
rootNode
};
}
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
try
{
DirInfo nodeToExpand = value as DirInfo;
if (nodeToExpand == null)
{
return(null);
}
//return the subdirectories of the Current Node
if ((ObjectType)nodeToExpand.DirType == ObjectType.MyComputer)
{
return((from sd in FileSystemExplorerService.GetRootDirectories()
select new DirInfo(sd)).ToList());
}
else
{
return((from dirs in FileSystemExplorerService.GetChildDirectories(nodeToExpand.Path)
select new DirInfo(dirs)).ToList());
}
}
catch { return(null); }
}
