public void Cancel_Move_Mode(TreeNode selectNode)
{
Cursor = Cursors.Default;
AllowDrop = false;
dragNode = null;
dragBitmapCursor = null;
SelectedNode = selectNode;
}
protected virtual Cursor CreateDragCursor(TreeNode node)
{
int width = 100;
int height = 20;
string text = "Invalid";
if (node != null)
{
width = node.Bounds.Width + 100;
if (width == 0)
{
width = 100;
}
height = node.Bounds.Height;
text = node.Text;
}
Rectangle r = new Rectangle(0, 0, width, height);
using (Graphics g0 = CreateGraphics())
using (Bitmap bmp = new Bitmap(width, height * 4, g0))
using (Graphics g = Graphics.FromImage(bmp))
{
g.Clear(Color.FromArgb(0, 0, 0, 0));
Color cb1 = Color.FromArgb(255, 0, 89, 181);
Color cb2 = Color.FromArgb(0, 0, 89, 181);
using (Brush b = new LinearGradientBrush(r, cb1, cb2, 0, false))
g.FillRectangle(b, 0, 0, width, height);
Color ct1 = Color.FromArgb(255, 255, 255, 255);
Color ct2 = Color.FromArgb(64, 255, 255, 255);
using (Brush b = new LinearGradientBrush(r, ct1, ct2, 0, false))
g.DrawString(text, Font, b, 0, 0);
dragBitmapCursor = new BitmapCursor(bmp, Cursors.Default);
return(dragBitmapCursor.Cursor);
}
}
/// <summary>
///
/// </summary>
/// <param name="e"></param>
protected override void OnDragDrop(DragEventArgs e)
{
// Custom cursor handling
Cursor = Cursors.Default;
// Check it's a treenode being dragged
if (e.Data.GetDataPresent("System.Windows.Forms.TreeNode", false))
{
// Get the target node from the mouse coords
Point pt = (this).PointToClient(new Point(e.X, e.Y));
TreeNode targetNode = GetNodeAt(pt);
// 1) Check we're not dragging onto ourself
// 2) Check we're not dragging onto one of our children
// (this is the lazy way, will break if there are nodes with the same name,
// but it's quicker than checking all nodes below is)
// 3) Check we're not dragging onto our parent
if ((targetNode != dragNode) && (!targetNode.FullPath.StartsWith(dragNode.FullPath)) && (dragNode.Parent != targetNode))
{
// Perform PAGE check
bool target_page = false;
if ((targetNode.Tag != null) && (((abstract_TreeNode)targetNode.Tag).Page))
{
target_page = true;
}
// Page can't be dropped in page, and Division can't be dropped in page
if (!target_page)
{
// Copy the node, add as a child to the destination node
dragNode.Remove();
targetNode.Nodes.Add(dragNode);
targetNode.Expand();
if (dragNode.SelectedImageIndex == 7)
{
dragNode.SelectedImageIndex = 4;
dragNode.ImageIndex = 4;
}
// Call drag complete event
if (DragComplete != null)
{
DragComplete(this, new DragCompleteEventArgs(dragNode, targetNode));
}
}
// Remove Original Node, set the dragged node as selected
SelectedNode = dragNode;
// Clear some values
dragBitmapCursor = null;
}
else
{
SelectedNode = dragNode;
}
}
base.OnDragDrop(e);
}