///
/// Event Handler for the ColumnHeader Click Event.
///
///
///
private void GridViewColumnHeaderClickedHandler(object sender, RoutedEventArgs e)
{
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)
{
SortableGridViewColumn sortableGridViewColumn = (headerClicked.Column) as SortableGridViewColumn;
// attempt to cast to the sortableGridViewColumn object.
var dataView = CollectionViewSource.GetDefaultView(this.ItemsSource);
// ensure that the column header is the correct type and a sort property has been set.
if (sortableGridViewColumn != null)
{
// get the sort property name from the column's information.
string sortPropertyName = sortableGridViewColumn.SortPropertyName;
if (!String.IsNullOrEmpty(sortPropertyName))
{
var lastDirection = sortableGridViewColumn.SortDirection;
ListSortDirection direction = SortableGridViewColumn.NoSort;
// determine if this is a new sort, or a switch in sort direction.
if (lastDirection == ListSortDirection.Ascending)
{
direction = ListSortDirection.Descending;
}
else if (lastDirection == ListSortDirection.Descending)
{
direction = SortableGridViewColumn.NoSort;
}
else
{
direction = ListSortDirection.Ascending;
}
Label sortIndicator = (Label)BaseWPFHelpers.SingleFindDownInTree(headerClicked, new BaseWPFHelpers.FinderMatchName("sortIndicator"));
// Sort the data.
Sort(sortPropertyName, direction);
if (direction == SortableGridViewColumn.NoSort)
{
sortIndicator.Style = (Style)dictionary["HeaderTemplateTransparent"];
}
else
{
if (direction == ListSortDirection.Ascending)
{
sortIndicator.Style = (Style)dictionary["HeaderTemplateArrowUp"];
}
else
{
sortIndicator.Style = (Style)dictionary["HeaderTemplateArrowDown"];
}
}
sortableGridViewColumn.SortDirection = direction;
}
}
}
}
void SortableListView_Loaded(object sender, RoutedEventArgs e)
{
FindTheHeaders();
// cast the ListView's View to a GridView
GridView gridView = this.View as GridView;
if (gridView != null)
{
// determine which column is marked as IsDefaultSortColumn. Stops on the first column marked this way.
SortableGridViewColumn sortableGridViewColumn = null;
foreach (GridViewColumn gridViewColumn in gridView.Columns)
{
sortableGridViewColumn = gridViewColumn as SortableGridViewColumn;
if (sortableGridViewColumn != null)
{
if (sortableGridViewColumn.SortDirection != SortableGridViewColumn.NoSort && !string.IsNullOrEmpty(sortableGridViewColumn.SortPropertyName))
{
var dataView = CollectionViewSource.GetDefaultView(this.ItemsSource);
if (dataView != null)
{
dataView.SortDescriptions.Add(new SortDescription(sortableGridViewColumn.SortPropertyName, sortableGridViewColumn.SortDirection));
GridViewColumnHeader header = m_Headers[sortableGridViewColumn];
if (header != null)
{
ListSortDirection direction = sortableGridViewColumn.SortDirection;
Label sortIndicator = (Label)BaseWPFHelpers.SingleFindDownInTree(header, new BaseWPFHelpers.FinderMatchName("sortIndicator"));
if (direction == SortableGridViewColumn.NoSort)
{
sortIndicator.Style = (Style)dictionary["HeaderTemplateTransparent"];
}
else
{
if (direction == ListSortDirection.Ascending)
{
sortIndicator.Style = (Style)dictionary["HeaderTemplateArrowUp"];
}
else
{
sortIndicator.Style = (Style)dictionary["HeaderTemplateArrowDown"];
}
}
}
//if (sortableGridViewColumn.SortDirection == ListSortDirection.Ascending)
//{
// if (!String.IsNullOrEmpty(this.ColumnHeaderSortedAscendingTemplate))
// {
// sortableGridViewColumn.HeaderTemplate = this.TryFindResource(ColumnHeaderSortedAscendingTemplate) as DataTemplate;
// }
//}
//else
//{
// if (!String.IsNullOrEmpty(this.ColumnHeaderSortedDescendingTemplate))
// {
// sortableGridViewColumn.HeaderTemplate = this.TryFindResource(ColumnHeaderSortedDescendingTemplate) as DataTemplate;
// }
//}
}
}
}
}
}
}
