private bool HandleDataObject(PackageFolder folder, IDataObject data, bool copy)
{
if (!CanHandleDataObject(folder, data))
{
return(false);
}
if (data.GetDataPresent(PackageFileDataFormat))
{
if (data.GetData(PackageFileDataFormat) is string packagePartPath)
{
var packagePart = RootFolder.GetPackageParts().FirstOrDefault(part => part.Path == packagePartPath);
if (packagePart != null)
{
folder = folder ?? RootFolder;
if (packagePart is PackageFile file)
{
folder.AddFile(file, copy);
}
else
{
if (packagePart is PackageFolder childFolder && !folder.IsDescendantOf(childFolder))
{
folder.AddFolder(childFolder, copy);
}
}
return(true);
}
}
}
if (data.GetDataPresent(NativeDragDrop.FileGroupDescriptorW))
{
folder = folder ?? RootFolder;
var viewModel = DataContext as PackageViewModel;
viewModel.AddDraggedAndDroppedFileDescriptors(folder, NativeDragDrop.GetFileGroupDescriptorW(data));
return(true);
}
if (data.GetDataPresent(DataFormats.FileDrop))
{
var value = data.GetData(DataFormats.FileDrop);
if (value is string[] filenames && filenames.Length > 0)
{
var viewModel = DataContext as PackageViewModel;
viewModel.AddDraggedAndDroppedFiles(folder, filenames);
return(true);
}
}
return(false);
}
private void OnTreeViewItemDrop(object sender, DragEventArgs e)
{
PackageFolder folder = null;
var item = sender as TreeViewItem;
if (item != null)
{
folder = item.DataContext as PackageFolder;
}
IDataObject data = e.Data;
if (data.GetDataPresent(DataFormats.FileDrop))
{
object value = data.GetData(DataFormats.FileDrop);
var filenames = value as string[];
if (filenames != null && filenames.Length > 0)
{
var viewModel = DataContext as PackageViewModel;
viewModel.AddDraggedAndDroppedFiles(folder, filenames);
e.Handled = true;
}
}
else if (data.GetDataPresent(PackageFileDataFormat))
{
var packagePart = data.GetData(PackageFileDataFormat) as PackagePart;
if (packagePart != null)
{
folder = folder ?? RootFolder;
var file = packagePart as PackageFile;
if (file != null)
{
bool copying = (e.KeyStates & DragDropKeyStates.ControlKey) == DragDropKeyStates.ControlKey;
folder.AddFile(file, copying);
}
else
{
var childFolder = packagePart as PackageFolder;
if (childFolder != null && !folder.IsDescendantOf(childFolder))
{
folder.AddFolder(childFolder);
}
}
e.Handled = true;
}
}
}
private void OnTreeViewItemDrop(object sender, DragEventArgs e)
{
PackageFolder folder = null;
if (sender is TreeViewItem item)
{
folder = item.DataContext as PackageFolder;
}
var data = e.Data;
if (data.GetDataPresent(DataFormats.FileDrop))
{
var value = data.GetData(DataFormats.FileDrop);
if (value is string[] filenames && filenames.Length > 0)
{
var viewModel = DataContext as PackageViewModel;
viewModel.AddDraggedAndDroppedFiles(folder, filenames);
e.Handled = true;
}
}
else if (data.GetDataPresent(PackageFileDataFormat))
{
if (data.GetData(PackageFileDataFormat) is PackagePart packagePart)
{
folder = folder ?? RootFolder;
if (packagePart is PackageFile file)
{
var copying = (e.KeyStates & DragDropKeyStates.ControlKey) == DragDropKeyStates.ControlKey;
folder.AddFile(file, copying);
}
else
{
if (packagePart is PackageFolder childFolder && !folder.IsDescendantOf(childFolder))
{
folder.AddFolder(childFolder);
}
}
e.Handled = true;
}
}
}