protected override void OnInitialized(EventArgs e)
{
this.AddHandler (GridViewColumnHeader.ClickEvent, new RoutedEventHandler (GridViewColumnHeaderClickedHandler));
GridView gridView = this.View as GridView;
if (gridView != null)
{
SortableGridViewColumn sortableGridViewColumn = null;
foreach (GridViewColumn gridViewColumn in gridView.Columns)
{
sortableGridViewColumn = gridViewColumn as SortableGridViewColumn;
if (sortableGridViewColumn != null)
{
if (sortableGridViewColumn.IsDefaultSortColumn)
{
break;
}
sortableGridViewColumn = null;
}
}
if (sortableGridViewColumn != null)
{
m_lastSortedOnColumn = sortableGridViewColumn;
Sort (sortableGridViewColumn.SortPropertyName, ListSortDirection.Ascending);
if (!String.IsNullOrEmpty (this.ColumnHeaderSortedAscendingTemplate))
{
sortableGridViewColumn.HeaderTemplate = this.TryFindResource (ColumnHeaderSortedAscendingTemplate) as DataTemplate;
}
this.SelectedIndex = 0;
}
}
base.OnInitialized (e);
}
private void GridViewColumnHeaderClickedHandler(object sender, RoutedEventArgs e)
{
GridViewColumnHeader headerClicked = e.OriginalSource as GridViewColumnHeader;
if (headerClicked != null && headerClicked.Role != GridViewColumnHeaderRole.Padding)
{
SortableGridViewColumn sortableGridViewColumn = (headerClicked.Column) as SortableGridViewColumn;
if (sortableGridViewColumn != null && !String.IsNullOrEmpty (sortableGridViewColumn.SortPropertyName))
{
ListSortDirection direction;
bool newSortColumn = false;
if (m_lastSortedOnColumn == null
|| String.IsNullOrEmpty (m_lastSortedOnColumn.SortPropertyName)
|| !String.Equals (sortableGridViewColumn.SortPropertyName, m_lastSortedOnColumn.SortPropertyName,
StringComparison.InvariantCultureIgnoreCase))
{
newSortColumn = true;
direction = ListSortDirection.Ascending;
}
else
{
if (m_lastDirection == ListSortDirection.Ascending)
{
direction = ListSortDirection.Descending;
}
else
{
direction = ListSortDirection.Ascending;
}
}
string sortPropertyName = sortableGridViewColumn.SortPropertyName;
Sort (sortPropertyName, direction);
if (direction == ListSortDirection.Ascending)
{
if (!String.IsNullOrEmpty (this.ColumnHeaderSortedAscendingTemplate))
{
sortableGridViewColumn.HeaderTemplate = this.TryFindResource (ColumnHeaderSortedAscendingTemplate) as DataTemplate;
}
else
{
sortableGridViewColumn.HeaderTemplate = null;
}
}
else
{
if (!String.IsNullOrEmpty (this.ColumnHeaderSortedDescendingTemplate))
{
sortableGridViewColumn.HeaderTemplate = this.TryFindResource (ColumnHeaderSortedDescendingTemplate) as DataTemplate;
}
else
{
sortableGridViewColumn.HeaderTemplate = null;
}
}
if (newSortColumn && m_lastSortedOnColumn != null)
{
if (!String.IsNullOrEmpty (this.ColumnHeaderNotSortedTemplate))
{
m_lastSortedOnColumn.HeaderTemplate = this.TryFindResource (ColumnHeaderNotSortedTemplate) as DataTemplate;
}
else
{
m_lastSortedOnColumn.HeaderTemplate = null;
}
}
m_lastSortedOnColumn = sortableGridViewColumn;
}
}
}
