static void Extend_Click(object sender, RoutedEventArgs e)
{
var gridViewColumnHeader = e.OriginalSource as GridViewColumnHeader;
if (GetParent(gridViewColumnHeader) == null)
{
SetParent(gridViewColumnHeader, gridViewColumnHeader.FindParent <GridView>());
}
var parent = GetParent(gridViewColumnHeader);
if (gridViewColumnHeader?.Column != null)
{
var direction = ListSortDirection.Ascending;
if (gridViewColumnHeader.Role != GridViewColumnHeaderRole.Padding)
{
if (gridViewColumnHeader != GridViewExtensions.GetLastClicked(parent))
{
direction = ListSortDirection.Ascending;
}
else
{
direction
= GetLastDirection(gridViewColumnHeader) == ListSortDirection.Ascending
? ListSortDirection.Descending
: ListSortDirection.Ascending;
}
}
string header = gridViewColumnHeader.Column.Header as string;
var listView = gridViewColumnHeader.FindParent <ListView>();
if (listView != null)
{
ItemsControlExtensions.SetSortDirection(listView, direction);
ItemsControlExtensions.SetSortName(listView, header);
}
SetSortDirection(gridViewColumnHeader, direction);
// Remove arrow from previously sorted header
if (GridViewExtensions.GetLastClicked(parent) != null && GridViewExtensions.GetLastClicked(parent) != gridViewColumnHeader)
{
SetSortDirection(GridViewExtensions.GetLastClicked(parent), null);
}
GridViewExtensions.SetLastClicked(parent, gridViewColumnHeader);
SetLastDirection(gridViewColumnHeader, direction);
}
}
