static CellGroup GetCellGroup(ITemplatedItemsList <Cell> templatedItems, CellCacheProvider cacheProvider)
{
var result = new CellGroup();
result.Header = templatedItems.HeaderContent;
result.Content = new List <Cell>();
for (int i = 0; i < templatedItems.Count; i++)
{
var item = templatedItems.ListProxy[i];
var cellCache = cacheProvider.GetCellCache(item);
Cell cell = cellCache.GetNextUnusedCell();
if (cell != null)
{
cell.SendDisappearing();
templatedItems.UpdateContent(cell, i);
cell.SendAppearing();
}
else
{
cell = templatedItems[i];
cellCache.AddUsedCell(cell);
cell.SendAppearing();
}
result.Content.Add(cell);
}
return(result);
}
public TemplatedItemsListProxy(ListView listview)
{
this.listview = listview;
templated = ((ITemplatedItemsView <Cell>)listview).TemplatedItems;
templated.CollectionChanged += Templated_CollectionChanged;
UpdateHeader();
UpdateFooter();
}
static Cell RealizeItemTemplate(ITemplatedItemsList <Cell> templatedItems,
ElementTemplate template, object context)
{
var index = templatedItems.GetGlobalIndexOfItem(context);
if (index > -1)
{
return(templatedItems[index]);
}
return(template.CreateContent() as Cell);
}
static Cell RealizeGroupedItemTemplate(ITemplatedItemsList <Cell> templatedItems,
ElementTemplate template, object context)
{
var indices = templatedItems.GetGroupAndIndexOfItem(context);
if (indices.Item1 > -1 && indices.Item2 > -1)
{
var group = templatedItems.GetGroup(indices.Item1);
return(group[indices.Item2]);
}
return(template.CreateContent() as Cell);
}
private bool HasHeader(ITemplatedItemsList <Cell> group)
{
if (Element == null)
{
return(false);
}
if (group.HeaderContent != null &&
Element.GroupShortNameBinding != null ||
Element.GroupHeaderTemplate != null)
{
return(true);
}
return(false);
}
Cell GetNewGroupHeaderCell(ITemplatedItemsList <Cell> group)
{
var groupHeaderCell = _listView.TemplatedItems.GroupHeaderTemplate?.CreateContent(group.ItemsSource, _listView) as Cell;
if (groupHeaderCell != null)
{
groupHeaderCell.BindingContext = group.ItemsSource;
}
else
{
groupHeaderCell = new TextCell();
groupHeaderCell.SetBinding(TextCell.TextProperty, nameof(group.Name));
groupHeaderCell.BindingContext = group;
}
groupHeaderCell.Parent = _listView;
groupHeaderCell.SetIsGroupHeader <ItemsView <Cell>, Cell>(true);
return(groupHeaderCell);
}
