//event handler for the GridViewColumnHeader click
private static void OnColumnHeaderClicked(object sender, RoutedEventArgs e)
{
ListView view = sender as ListView;
if (view == null)
{
return;
}
GridViewSortHandler handler = view.GetValue(GridViewSortHandlerProperty) as GridViewSortHandler;
if (handler == null)
{
return;
}
//set the parent control of the handler
handler.parentControl = view;
handler.comparer = view.GetValue(CustomComparerProperty) as GridViewCustomComparer;
GridViewColumnHeader headerClicked = e.OriginalSource as GridViewColumnHeader;
// ensure that we clicked on the column header and not the padding that's added to fill the space.
if (headerClicked != null && headerClicked.Role != GridViewColumnHeaderRole.Padding)
{
// attempt to cast to the sortableGridViewColumn object.
SortableGridViewColumn sortableGridViewColumn = headerClicked.Column as SortableGridViewColumn;
if (sortableGridViewColumn.CanSort)
{
handler.ApplySort(sortableGridViewColumn);
}
}
}
