private void DragEnterOver(DragEventArgs e, DragType type)
{
var dropData = new FilesDropData(e.Data);
if (dropData.HasFiles)
{
var filesEventArgs = new FilesDragEventArgs(dropData, new Point(e.X, e.Y), e.AllowedEffect, e.KeyState);
filesEventArgs.Effect = e.Effect;
switch (type)
{
case DragType.Enter:
OnDragEnter(filesEventArgs);
break;
case DragType.Over:
OnDragOver(filesEventArgs);
break;
}
e.Effect = filesEventArgs.Effect;
}
else
{
e.Effect = DragDropEffects.None;
}
}
private void _dragDropManager_DragOver(object sender, FilesDragEventArgs e)
{
e.Effect = DragDropEffects.None;
if (Root == null)
{
return;
}
Debug.Assert(_dragging);
var node = _treeView.GetNodeAt(_treeView.PointToClient(new Point(e.X, e.Y)));
_treeView.SelectedNode = node ?? _beforeDragSelection;
if (node == null)
{
return;
}
var matches = BuildMatches((string)node.Tag, e);
if (matches == null)
{
return;
}
var effectiveEffect = DragDropEffects.None;
foreach (var match in matches)
{
DragDropEffects effect;
if (match.Kind.IsMove())
{
effect = DragDropEffects.Move;
}
else
{
effect = DragDropEffects.Copy;
}
if (effect != DragDropEffects.None)
{
if (effectiveEffect == DragDropEffects.None)
{
effectiveEffect = effect;
}
else
{
effectiveEffect = effectiveEffect & effect;
}
}
}
e.Effect = effectiveEffect & e.AllowedEffect;
}
private void _dragDropManager_DragEnter(object sender, FilesDragEventArgs e)
{
if (_dragging)
{
return;
}
_dragging = true;
_beforeDragSelection = _treeView.SelectedNode;
}
private void _dragDropManager_DragEnter(object sender, FilesDragEventArgs e)
{
e.Effect = DragDropEffects.None;
if (Directory == null)
{
return;
}
var matches = BuildMatches(e);
if (matches == null)
{
return;
}
var effectiveEffect = DragDropEffects.None;
foreach (var match in matches)
{
DragDropEffects effect;
if (match.Kind.IsDirectory())
{
effect = DragDropEffects.None;
}
else if (match.Kind.IsMove())
{
effect = DragDropEffects.Move;
}
else
{
effect = DragDropEffects.Copy;
}
if (effect != DragDropEffects.None)
{
if (effectiveEffect == DragDropEffects.None)
{
effectiveEffect = effect;
}
else
{
effectiveEffect = effectiveEffect & effect;
}
}
}
e.Effect = effectiveEffect & e.AllowedEffect;
}
private void _dragDropManager_DragDrop(object sender, FilesDragEventArgs e)
{
EndDragDrop();
var node = _treeView.GetNodeAt(_treeView.PointToClient(new Point(e.X, e.Y)));
if (node == null)
{
return;
}
string targetPath = (string)node.Tag;
var matches = BuildMatches(targetPath, e);
if (matches == null)
{
return;
}
try
{
foreach (var match in matches)
{
string target = Path.Combine(targetPath, Path.GetFileName(match.Path));
if (match.Kind.IsFile() && File.Exists(target))
{
var result = TaskDialogEx.Show(
this,
"The destination already has a file with this name. Do you want to overwrite the existing file?",
FindForm().Text,
TaskDialogCommonButtons.Yes | TaskDialogCommonButtons.No | TaskDialogCommonButtons.Cancel,
TaskDialogIcon.Warning
);
if (result == DialogResult.No)
{
continue;
}
if (result == DialogResult.Cancel)
{
return;
}
File.Delete(target);
}
switch (match.Kind)
{
case DropMatchKind.DirectoryMove:
IODirectory.Move(match.Path, target);
break;
case DropMatchKind.DirectoryCopy:
PathUtil.CopyDirectory(match.Path, target);
break;
case DropMatchKind.FileMove:
File.Move(match.Path, target);
break;
case DropMatchKind.FileCopy:
File.Copy(match.Path, target);
break;
case DropMatchKind.FileVirtual:
File.WriteAllBytes(target, e.DropData.GetFileData(match.Index));
break;
}
}
}
catch
{
TaskDialogEx.Show(this, "Could not complete the operation", FindForm().Text, TaskDialogCommonButtons.OK, TaskDialogIcon.Error);
}
}
private List <DropMatch> BuildMatches(string targetPath, FilesDragEventArgs e)
{
return(DropMatch.FromDropData(Root, targetPath, FileBrowserManager, e));
}
public static List <DropMatch> FromDropData(string rootPath, string targetPath, FileBrowserManager fileBrowserManager, FilesDragEventArgs e)
{
if (rootPath == null)
{
throw new ArgumentNullException(nameof(rootPath));
}
if (targetPath == null)
{
throw new ArgumentNullException(nameof(targetPath));
}
if (e == null)
{
throw new ArgumentNullException(nameof(e));
}
FilesDropData dropData = e.DropData;
if (dropData == null)
{
throw new ArgumentNullException(nameof(dropData));
}
var matches = new List <DropMatch>();
for (int i = 0; i < dropData.FileNames.Length; i++)
{
string fileName = dropData.FileNames[i];
if (!IOPath.IsPathRooted(fileName))
{
// Normal drag/drop operations have the full path. Drag/drop operations
// without a full path generally are Ole objects that don't point to
// physical files, like drag/dropping from an Outlook email or a Windows
// compressed folder. To get the data,
matches.Add(new DropMatch(fileName, i, DropMatchKind.FileVirtual));
continue;
}
var fileInfo = new FileInfo(fileName);
if (fileInfo.Attributes.IsHidden())
{
continue;
}
bool contained = PathUtil.ContainsPath(rootPath, fileInfo.FullName) != PathContains.Not;
bool ctrlKeyPressed = (e.KeyState & 8) != 0;
bool shiftKeyPressed = (e.KeyState & 4) != 0;
if (PathUtil.ContainsPath(targetPath, fileInfo.DirectoryName) == PathContains.Equals)
{
continue;
}
if (fileInfo.Attributes.IsDirectory())
{
if (Directory.Exists(IOPath.Combine(targetPath, fileInfo.Name)))
{
continue;
}
if (PathUtil.ContainsPath(fileInfo.FullName, targetPath) != PathContains.Not)
{
continue;
}
var kind = contained ? DropMatchKind.DirectoryMove : DropMatchKind.DirectoryCopy;
if (ctrlKeyPressed && kind == DropMatchKind.DirectoryMove)
{
kind = DropMatchKind.DirectoryCopy;
}
else if (shiftKeyPressed && kind == DropMatchKind.DirectoryCopy)
{
kind = DropMatchKind.DirectoryMove;
}
matches.Add(new DropMatch(fileInfo.FullName, i, kind));
}
else if (fileBrowserManager != null && fileBrowserManager.Matches(fileInfo.FullName))
{
var kind = contained ? DropMatchKind.FileMove : DropMatchKind.FileCopy;
if (ctrlKeyPressed && kind == DropMatchKind.FileMove)
{
kind = DropMatchKind.FileCopy;
}
else if (shiftKeyPressed && kind == DropMatchKind.FileCopy)
{
kind = DropMatchKind.FileMove;
}
matches.Add(new DropMatch(fileInfo.FullName, i, kind));
}
}
return(matches);
}
protected virtual void OnDragOver(FilesDragEventArgs e)
{
DragOver?.Invoke(this, e);
}
protected virtual void OnDragDrop(FilesDragEventArgs e)
{
DragDrop?.Invoke(this, e);
}
private List <DropMatch> BuildMatches(FilesDragEventArgs e)
{
return(DropMatch.FromDropData(Directory, Directory, FileBrowserManager, e));
}