/// <summary>
/// This event is fired when the user drags over a drag and drop control with the mouse.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void fileSystemTreeView_DragOver(object sender, DragEventArgs e)
{
//Console.WriteLine("dragover");
// Compute drag position and move image
Point position = this.fileSystemTreeView.PointToClient(new Point(e.X, e.Y));
DragHelper.ImageList_DragMove(position.X - this.fileSystemTreeView.Left, position.Y - this.fileSystemTreeView.Top);
// Get actual drop node
TreeNode dropNode = this.fileSystemTreeView.GetNodeAt(position);
if (dropNode == null)
{
e.Effect = DragDropEffects.None;
return;
}
//if ((e.KeyState & 8) == 8) //ctrl - copy
//{
// ShowToolTip(position.X, position.Y, "Copy to ");
//}
//else
//{
// ShowToolTip(position.X, position.Y, "Move to ");
//}
e.Effect = DragDropEffects.Move;
// if mouse is on a new node select it
if (this.tempDropNode != dropNode)
{
DragHelper.ImageList_DragShowNolock(false);
this.fileSystemTreeView.SelectedNode = dropNode;
DragHelper.ImageList_DragShowNolock(true);
tempDropNode = dropNode;
}
// Avoid that drop node is child of drag node
TreeNode tmpNode = dropNode;
while (tmpNode.Parent != null)
{
if (tmpNode.Parent == this.dragNode)
{
e.Effect = DragDropEffects.None;
}
tmpNode = tmpNode.Parent;
}
}
/// <summary>
/// This event is fired when the user releases the mouse over the drop target.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void fileSystemTreeView_DragDrop(object sender, DragEventArgs e)
{
// Unlock updates
DragHelper.ImageList_DragLeave(this.fileSystemTreeView.Handle);
Console.WriteLine("drag: {0}", dragNode.Text);
Point position = this.fileSystemTreeView.PointToClient(new Point(e.X, e.Y));
TreeNode dropNode = this.fileSystemTreeView.GetNodeAt(position);
Console.WriteLine("drop: {0}", dropNode.Text);
if (this.dragNode != dropNode)
{
// node is a drive
if (this.dragNode.Parent == null)
{
}
// node is a folder
else
{
try
{
Directory.Move(this.dragNode.FullPath.Replace(@"\\", @"\"), dropNode.FullPath.Replace(@"\\", @"\") + @"\" + this.dragNode.Text);
if (this.dragNode.Parent.Nodes.Count == 1)
{
this.dragNode.Parent.ImageIndex = 0;
this.dragNode.Parent.SelectedImageIndex = 0;
this.dragNode.Parent.StateImageIndex = 0;
}
}
catch (IOException ex)
{
}
//if ((e.KeyState & 8) == 8) //ctrl - copy
//{
// Directory.Copy()
//}
//else
//{
// Directory.Move()
//}
}
}
this.dragNode = null;
this.scrollTimer.Enabled = false;
//this.tooltip.Hide(this.fileSystemTreeView);
}
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void scrollTimer_Tick(object sender, EventArgs e)
{
// get node at mouse position
Point pt = this.fileSystemTreeView.PointToClient(Control.MousePosition);
TreeNode node = this.fileSystemTreeView.GetNodeAt(pt);
if (node == null)
{
return;
}
// if mouse is near to the top, scroll up
if (pt.Y < 30)
{
// set actual node to the upper one
if (node.PrevVisibleNode != null)
{
node = node.PrevVisibleNode;
// hide drag image
DragHelper.ImageList_DragShowNolock(false);
// scroll and refresh
node.EnsureVisible();
this.fileSystemTreeView.Refresh();
// show drag image
DragHelper.ImageList_DragShowNolock(true);
}
}
// if mouse is near to the bottom, scroll down
else if (pt.Y > this.fileSystemTreeView.Size.Height - 30)
{
if (node.NextVisibleNode != null)
{
node = node.NextVisibleNode;
DragHelper.ImageList_DragShowNolock(false);
node.EnsureVisible();
this.fileSystemTreeView.Refresh();
DragHelper.ImageList_DragShowNolock(true);
}
}
}
//private ImageList imageListDrag = new ImageList();
/// <summary>
/// This event is fired as soon as a drag operation is started.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void fileSystemTreeView_ItemDrag(object sender, ItemDragEventArgs e)
{
this.dragNode = (TreeNode)e.Item;
this.fileSystemTreeView.SelectedNode = this.dragNode;
Console.WriteLine("dragnode: {0}", this.dragNode.Text);
Bitmap bmp = new Bitmap(32, 32);
Graphics gfx = Graphics.FromImage(bmp);
gfx.DrawImage(this.fileSystemTreeView.ImageList.Images[0], 0, 0);
Point p = this.fileSystemTreeView.PointToClient(Control.MousePosition);
int dx = p.X + this.fileSystemTreeView.Indent - this.dragNode.Bounds.Left - this.fileSystemTreeView.Location.X;
int dy = p.Y - this.dragNode.Bounds.Top - this.fileSystemTreeView.Location.Y;
if (DragHelper.ImageList_BeginDrag(this.fileSystemTreeView.ImageList.Handle, 0, dx, dy))
{
// Begin dragging
this.fileSystemTreeView.DoDragDrop(bmp, DragDropEffects.Move);
// End dragging image
DragHelper.ImageList_EndDrag();
}
}
/// <summary>
/// This event is fired when the user leaves the control with the mouse while dragging an element.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void fileSystemTreeView_DragLeave(object sender, EventArgs e)
{
Console.WriteLine("dragleave");
DragHelper.ImageList_DragLeave(this.fileSystemTreeView.Handle);
this.scrollTimer.Enabled = false;
}
/// <summary>
/// This event is fired when the user moves the mouse onto the control while dragging an element.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void fileSystemTreeView_DragEnter(object sender, DragEventArgs e)
{
Console.WriteLine("dragenter");
DragHelper.ImageList_DragEnter(this.fileSystemTreeView.Handle, e.X - this.fileSystemTreeView.Left, e.Y - this.fileSystemTreeView.Top);
this.scrollTimer.Enabled = true;
}
