GroupTemplateContext CreateGroupTemplateContext(object group)
{
var groupHeaderTemplateContext = _groupHeaderTemplate != null
? new ItemTemplateContext(_groupHeaderTemplate, group, _container) : null;
var groupFooterTemplateContext = _groupFooterTemplate != null
? new GroupFooterItemTemplateContext(_groupFooterTemplate, group, _container) : null;
// This is where we'll eventually look at GroupItemPropertyName
var groupItemsList = TemplatedItemSourceFactory.Create(group as IEnumerable, _itemTemplate, _container);
return(new GroupTemplateContext(groupHeaderTemplateContext, groupFooterTemplateContext, groupItemsList));
}
protected override CollectionViewSource CreateCollectionViewSource()
{
var collectionViewSource = TemplatedItemSourceFactory.Create(Element.ItemsSource, Element.ItemTemplate, Element,
GetItemHeight(), GetItemWidth(), GetItemSpacing());
if (collectionViewSource is ObservableItemTemplateCollection observableItemsSource)
{
observableItemsSource.CollectionChanged += CollectionItemsSourceChanged;
}
return(new CollectionViewSource
{
Source = collectionViewSource,
IsSourceGrouped = false
});
}
protected virtual CollectionViewSource CreateCollectionViewSource()
{
var itemsSource = Element.ItemsSource;
var itemTemplate = Element.ItemTemplate;
if (itemTemplate != null)
{
return(new CollectionViewSource
{
Source = TemplatedItemSourceFactory.Create(itemsSource, itemTemplate, Element),
IsSourceGrouped = false
});
}
return(new CollectionViewSource
{
Source = itemsSource,
IsSourceGrouped = false
});
}
protected override CollectionViewSource CreateCollectionViewSource()
{
if (ItemsView != null && ItemsView.IsGrouped)
{
var itemTemplate = Element.ItemTemplate;
var itemsSource = Element.ItemsSource;
return(new CollectionViewSource
{
Source = TemplatedItemSourceFactory.CreateGrouped(itemsSource, itemTemplate,
ItemsView.GroupHeaderTemplate, ItemsView.GroupFooterTemplate, Element),
IsSourceGrouped = true,
ItemsPath = new Microsoft.UI.Xaml.PropertyPath(nameof(GroupTemplateContext.Items))
});
}
else
{
return(base.CreateCollectionViewSource());
}
}