/// <summary>
/// Checks if the edgecases (currently just Datagrid) acctually need to be handled and corrects
/// <paramref name="senderObject" />, if necessary.
/// Since DataGridHeaders were not individually handled in
/// <see cref="LocalizerEventHandler" />, they are handled here.
/// </summary>
/// <param name="senderObject">
/// The object that triggered the MouseEvent.
/// If it is a DataGrid it will be exchanged for the DataGridHeader that was clicked.
/// </param>
/// <param name="eventArgs">EventArgs received by event handler.</param>
/// <returns>
/// True if correct element was clicked. False, if this event is not meant to be handled.
/// </returns>
private static bool CorrectElementWasClicked(ref object senderObject, MouseButtonEventArgs eventArgs)
{
if (senderObject is DataGrid)
{
//find the DataGridColumnHeader that was originally clicked
//use the VisualTree, as Headers aren't found in the LogicalTree.
//eventArgs.OriginalSource can be cast to DepencyObject, as
//FindVisualParent returns null in that case.
var columnHeader =
VisualTreeUtils.FindVisualParent <DataGridColumnHeader>(
eventArgs.OriginalSource as DependencyObject);
if (columnHeader == null)
{
//Header wasn't clicked.
return(false);
}
senderObject = columnHeader;
return(true);
}
//if senderObject is not considered edgecase, it will be assumed to be correct.
return(true);
}
public override DataTemplate SelectTemplate(object item, DependencyObject container)
{
FrameworkElement element = container as FrameworkElement;
TabbedExpanderView tabbedExpander = VisualTreeUtils.FindVisualParent <TabbedExpanderView>(element);
if (tabbedExpander.Items.Count == 1)
{
return(Application.Current.Resources["ExpanderHeaderItemStyle"] as DataTemplate);
}
else
{
return(Application.Current.Resources["ExpanderHeaderItemsStyle"] as DataTemplate);
}
//return null;
}