private void InputFilesListView_DragDrop(object sender, DragEventArgs e)
{
if (InputFilesListView.SelectedItems.Count > 1)
{
throw new ApplicationException("Only single drag and drop is supported.");
}
if (InputFilesListView.SelectedItems.Count < 1)
{
return;
}
var dragItem = InputFilesListView.SelectedItems[0];
var point = InputFilesListView.PointToClient(new Point(e.X, e.Y));
var dropItem = InputFilesListView.GetItemAt(point.X, point.Y);
if (dragItem == dropItem)
{
return;
}
var clone = (ListViewItem)dragItem.Clone();
var checkedItem = CoverSheetIndex == -1
? null
: dragItem.Index == CoverSheetIndex
? clone
: InputFilesListView.Items[CoverSheetIndex];
if (dropItem == null)
{
InputFilesListView.Items.Add(clone);
}
else
{
InputFilesListView.Items.Insert(
dropItem.Index + (dragItem.Index < dropItem.Index ? 1 : 0),
clone);
}
InputFilesListView.Items.Remove(dragItem);
if (checkedItem != null)
{
CoverSheetIndex = InputFilesListView.Items.IndexOf(checkedItem);
}
}
private void InputFilesListView_ItemDrag(object sender, ItemDragEventArgs e) => InputFilesListView.DoDragDrop(e.Item, DragDropEffects.Move);
