/// <summary>
/// HeaderProperty property changed handler.
/// </summary>
/// <param name="d">
/// HeaderedItemsControl that changed its Header.
/// </param>
/// <param name="e">Event arguments.</param>
private static void OnHeaderPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
HeaderedItemsControl source = d as HeaderedItemsControl;
source.OnHeaderChanged(e.OldValue, e.NewValue);
}
/// <summary>
/// Prepare a PrepareHeaderedItemsControlContainer container for an
/// item.
/// </summary>
/// <param name="control">Container to prepare.</param>
/// <param name="item">Item to be placed in the container.</param>
/// <param name="parentItemsControl">The parent ItemsControl.</param>
/// <param name="parentItemContainerStyle">
/// The ItemContainerStyle for the parent ItemsControl.
/// </param>
private static void PrepareHeaderedItemsControlContainer(HeaderedItemsControl control, object item, ItemsControl parentItemsControl, Style parentItemContainerStyle)
{
if (control != item)
{
// Copy the ItemsControl properties from parent to child
DataTemplate parentItemTemplate = parentItemsControl.ItemTemplate;
if (parentItemTemplate != null)
{
control.SetValue(HeaderedItemsControl.ItemTemplateProperty, parentItemTemplate);
}
if (parentItemContainerStyle != null && HasDefaultValue(control, HeaderedItemsControl.ItemContainerStyleProperty))
{
control.SetValue(HeaderedItemsControl.ItemContainerStyleProperty, parentItemContainerStyle);
}
// Copy the Header properties from parent to child
if (control.HeaderIsItem || HasDefaultValue(control, HeaderedItemsControl.HeaderProperty))
{
control.Header = item;
control.HeaderIsItem = true;
}
if (parentItemTemplate != null)
{
control.SetValue(HeaderedItemsControl.HeaderTemplateProperty, parentItemTemplate);
}
if (parentItemContainerStyle != null && control.Style == null)
{
control.SetValue(HeaderedItemsControl.StyleProperty, parentItemContainerStyle);
}
// Note: this is where we would apply the HeaderTemplateSelector
// (if implemented) or attempt to lookup the implicit template
// for the type of the item if the headerTemplate were null.
// Setup a hierarchical template
HierarchicalDataTemplate headerTemplate = parentItemTemplate as HierarchicalDataTemplate;
if (headerTemplate != null)
{
if (headerTemplate.ItemsSource != null && HasDefaultValue(control, HeaderedItemsControl.ItemsSourceProperty))
{
control.SetBinding(
HeaderedItemsControl.ItemsSourceProperty,
new Binding
{
Converter = headerTemplate.ItemsSource.Converter,
ConverterCulture = headerTemplate.ItemsSource.ConverterCulture,
ConverterParameter = headerTemplate.ItemsSource.ConverterParameter,
Mode = headerTemplate.ItemsSource.Mode,
NotifyOnValidationError = headerTemplate.ItemsSource.NotifyOnValidationError,
Path = headerTemplate.ItemsSource.Path,
Source = control.Header,
ValidatesOnExceptions = headerTemplate.ItemsSource.ValidatesOnExceptions
});
}
if (headerTemplate.IsItemTemplateSet && control.ItemTemplate == parentItemTemplate)
{
control.ClearValue(HeaderedItemsControl.ItemTemplateProperty);
if (headerTemplate.ItemTemplate != null)
{
control.ItemTemplate = headerTemplate.ItemTemplate;
}
}
if (headerTemplate.IsItemContainerStyleSet && control.ItemContainerStyle == parentItemContainerStyle)
{
control.ClearValue(HeaderedItemsControl.ItemContainerStyleProperty);
if (headerTemplate.ItemContainerStyle != null)
{
control.ItemContainerStyle = headerTemplate.ItemContainerStyle;
}
}
}
}
}
