private void SetSorting(GridViewColumnHeader columnHeader, ListSortDirection?sortingDirection = null)
{
if (!this.IsSortable)
{
return;
}
var path = GridViewColumnProperties.GetSortingPropertyName(columnHeader);
if (path == null)
{
return;
}
var gridView = columnHeader.Column.GetInheritanceContext() as GridView;
if (gridView == null)
{
return;
}
var listView = gridView.GetInheritanceContext() as ListView;
if (listView == null)
{
return;
}
if (this.sortedHeader != null)
{
AdornerLayer.GetAdornerLayer(this.sortedHeader).Remove(this.sortAdorner);
listView.Items.SortDescriptions.Clear();
}
var newSorting = sortingDirection ?? ListSortDirection.Ascending;
if (!sortingDirection.HasValue && this.sortedHeader == columnHeader && this.sortAdorner.Direction == newSorting)
{
newSorting = ListSortDirection.Descending;
}
this.sortedHeader = columnHeader;
this.sortAdorner = new SortAdorner(this.sortedHeader, newSorting)
{
Foreground = this.InheritanceContext.As <ListView>()?.Foreground
};
AdornerLayer.GetAdornerLayer(this.sortedHeader).Add(this.sortAdorner);
try
{
listView.Items.SortDescriptions.Add(new SortDescription(path, newSorting));
}
catch (Exception e)
{
Debug.WriteLine("Error: Unable to sort elements: " + e.Message);
}
}
private void CreateHeaders()
{
int index = 0;
var dataContextType = this.InheritanceContext?.As <FrameworkElement>()?.DataContext?.GetType();
foreach (var column in this.AssociatedObject.Columns)
{
// check the header if it contains a GridViewColumnHeader or not... if not, then
// create a GridViewColumnHeader and assign the value to the GridViewColumnHeader
var header = column.Header is GridViewColumnHeader ?
column.Header as GridViewColumnHeader :
new GridViewColumnHeader {
Content = column.Header
};
header.Click += (s, args) => this.SetSorting(s as GridViewColumnHeader);
header.Uid = $"index_{index++}";
header.HorizontalContentAlignment = HorizontalAlignment.Center;
column.Header = header;
if (dataContextType == null)
{
continue;
}
var memberBinding = column.DisplayMemberBinding as Binding;
if (memberBinding == null)
{
continue;
}
var path = memberBinding.Path.Path;
if (path == null)
{
continue;
}
GridViewColumnProperties.SetSortingPropertyName(header, path);
column.DisplayMemberBinding = null; // Always remove the displaybinding if a member is defined
if (column.CellTemplate != null)
{
continue;
}
// auto formatting down here
var formatting = GridViewColumnProperties.GetFormatting(column);
column.CellTemplate = this.CreateDateTemplate(memberBinding, formatting);
}
}
