/// <summary>
/// Ends dragging any selected items managed by the adapter. May be called
/// by another adapter when it ends dragging. May be called from within a transaction.</summary>
void IItemDragAdapter.EndDrag()
{
// An item may be moved after a drag, need to update its DefaultPart bound by raising SelectedItemHit
if (m_hitRecord != null && m_hitRecord.DefaultPart != null)
{
Point clientPoint = AdaptedControl.PointToClient(Cursor.Position);
var hitRecord = Pick(clientPoint);
if (hitRecord.Item == m_hitRecord.Item)
{
SelectedItemHit.Raise(this, new DiagramHitEventArgs(hitRecord));
}
}
}
private void control_DragDrop(object sender, DragEventArgs e)
{
if (m_selectionContext != null || !m_selectionContext.Selection.Any())
{
// items may be selected programmatically after the drag & drop,
// raise SelectedItemHit to enable label editor start editing with F2 without mouse click over the selected item first
// items may be placed using mouse position as upper-left corner;
// offset slightly of the mouse position to get better chance to pick the newly dropped item.
const int offset = 20;
var point = AdaptedControl.PointToClient(new Point(e.X + offset, e.Y + offset));
m_hitRecord = Pick(point);
if (m_hitRecord != null)
{
SelectedItemHit.Raise(this, new DiagramHitEventArgs(m_hitRecord));
}
}
}
/// <summary>
/// Updates mouse position</summary>
/// <param name="e">Drag event arguments</param>
protected void SetMousePosition(DragEventArgs e)
{
m_mousePosition = AdaptedControl.PointToClient(new Point(e.X, e.Y));
}