protected override void OnDragLeave(EventArgs e)
{
CleanupDragVisuals();
// Call cancel event
if (DragCancel != null)
{
DragSourceEventArgs ea = new DragSourceEventArgs();
ea.Nodes = SelectedNodes;
DragCancel(this, ea);
}
}
protected override void OnKeyUp(KeyEventArgs e)
{
if (e.KeyCode == Keys.Escape)
{
DrawSelectedNodesAsNormal();
if (_dragDestinationNode != null)
{
DrawNodeAsNormal(_dragDestinationNode);
}
Cursor = Cursors.Default;
// Call cancel event
if (DragCancel != null)
{
DragSourceEventArgs ea = new DragSourceEventArgs();
ea.Nodes = SelectedNodes;
DragCancel(this, ea);
}
}
}
protected override void OnItemDrag(ItemDragEventArgs e)
{
// if the item wasn't even properly clicked on, don't start a drag
if (!_clickedNodeWasInBounds)
{
return;
}
base.OnItemDrag(e);
// Call dragstart event
if (DragStart != null)
{
DragSourceEventArgs ea = new DragSourceEventArgs();
ea.Nodes = SelectedNodes;
DragStart(this, ea);
}
DrawSelectedNodesAsDragSource();
// Start drag drop
DoDragDrop(SelectedNodes, DragDropEffects.All);
}