private static void ExchangeRows(object sender, object target)
{
var draggedRow = RowDragHelper.GetDraggedItem(sender as DependencyObject);
if (draggedRow == null)
{
return;
}
if (target != null && !ReferenceEquals(draggedRow, target))
{
var list = ((DataGrid)sender).ItemsSource as IList;
if (list == null)
{
return;
}
int oldIndex = list.IndexOf(draggedRow);
var targetIndex = list.IndexOf(target);
list.Remove(draggedRow);
list.Insert(targetIndex, draggedRow);
//Console.WriteLine("Row Switch");
RowSwitchEventArgs args = new RowSwitchEventArgs()
{
PrimaryRowIndex = targetIndex,
DisplacedRowIndex = oldIndex
};
OnRowSwitch(args);
}
}
private static void RowDragOnPreviewMouseLeftButtonUp(object sender, MouseButtonEventArgs mouseButtonEventArgs)
{
var draggedItem = RowDragHelper.GetDraggedItem(sender as DependencyObject);
if (draggedItem == null)
{
return;
}
//disabled because it seems to glitch out when 2 custom programs are swapped
//ExchangeRows(sender, ((DataGrid) sender).SelectedItem);
((DataGrid)sender).SelectedItem = draggedItem;
RowDragHelper.SetDraggedItem(sender as DataGrid, null);
}
private static void RowDragOnMouseMove(object sender, MouseEventArgs mouseEventArgs)
{
var draggedRow = RowDragHelper.GetDraggedItem(sender as DependencyObject);
DataGrid g = sender as DataGrid;
if (draggedRow == null || g == null)
{
return;
}
var targetRow = GetRowFromPoint(g, mouseEventArgs.GetPosition(g));
if (targetRow == null)
{
return;
}
ExchangeRows(g, targetRow.Item);
}