private void TreeViewItem_Collapsed(object sender, RoutedEventArgs e)
{
if (currentFolderSetByMouseDown)
{
FilePickerViewModel vm = DataContext as FilePickerViewModel;
vm.SelectedFolder = originalFolder;
vm.SelectedEntry = originalEntry;
originalFolder = null;
originalEntry = null;
currentFolderSetByMouseDown = false;
}
}
private void TreeViewItem_Expanded(object sender, RoutedEventArgs e)
{
TreeViewItem item = e.OriginalSource as TreeViewItem;
if (item.DataContext is FolderEntry entry)
{
entry.LoadFoldersOnDemand();
if (currentFolderSetByMouseDown)
{
FilePickerViewModel vm = DataContext as FilePickerViewModel;
vm.SelectedFolder = originalFolder;
vm.SelectedEntry = originalEntry;
originalFolder = null;
originalEntry = null;
currentFolderSetByMouseDown = false;
}
}
}
private void RootFolderItem_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
if (sender is TreeViewItem item)
{
item.BringIntoView();
if (item.DataContext is FolderEntry entry)
{
entry.LoadFoldersOnDemand();
entry.LoadFilesOnDemand();
FilePickerViewModel vm = DataContext as FilePickerViewModel;
originalFolder = vm.SelectedFolder;
originalEntry = vm.SelectedEntry;
vm.SelectedFolder = entry;
vm.SelectedEntry = entry;
currentFolderSetByMouseDown = true;
}
}
}
public FilePickerClosedEventArgs(IFilePickerEntry filePickerEntry)
{
filePath = filePickerEntry?.Path;
fileName = filePickerEntry?.Name;
dialogResult = filePickerEntry != null ? MessageBoxResult.OK : MessageBoxResult.Cancel;
}
