protected void BindCollection <TElement>(CollectionViewModel <TElement> viewModel,
Func <TElement, Element> element, bool activateNow = false)
{
Action updateDel = () =>
{
try
{
IEnumerable <TElement> items = viewModel.Items;
var filterFn = viewModel.FilteringFunction;
if (filterFn != null)
{
items = filterFn(items);
}
var sortFn = viewModel.SortingFunction;
if (sortFn != null)
{
items = sortFn(items);
}
var groupingFn = viewModel.GroupingFunction;
IEnumerable <IGrouping <string, TElement> > groupedItems = null;
if (groupingFn != null)
{
groupedItems = groupingFn(items);
}
if (groupedItems == null)
{
RenderList(items, element, viewModel.MoreItems);
}
else
{
RenderGroupedItems(groupedItems, element, viewModel.MoreItems);
}
}
catch (Exception e)
{
e.Report();
}
};
viewModel.Bind(x => x.GroupingFunction, updateDel);
viewModel.Bind(x => x.FilteringFunction, updateDel);
viewModel.Bind(x => x.SortingFunction, updateDel);
//The CollectionViewModel binds all of the collection events from the observablecollection + more
//So just listen to it.
viewModel.CollectionChanged += (sender, e) => InvokeOnMainThread(() => updateDel());
if (activateNow)
{
updateDel();
}
}
protected void BindCollection <TElement>(CollectionViewModel <TElement> viewModel,
Func <TElement, Element> element, bool activateNow = false)
{
var weakVm = new WeakReference <CollectionViewModel <TElement> >(viewModel);
var weakRoot = new WeakReference <RootElement>(Root);
Action updateDel = () =>
{
try
{
IEnumerable <TElement> items = viewModel.Items;
var filterFn = viewModel.FilteringFunction;
if (filterFn != null)
{
items = filterFn(items);
}
var sortFn = viewModel.SortingFunction;
if (sortFn != null)
{
items = sortFn(items);
}
var groupingFn = viewModel.GroupingFunction;
IEnumerable <IGrouping <string, TElement> > groupedItems = null;
if (groupingFn != null)
{
groupedItems = groupingFn(items);
}
ICollection <Section> newSections;
if (groupedItems == null)
{
newSections = RenderList(items, element, weakVm.Get()?.MoreItems);
}
else
{
newSections = RenderGroupedItems(groupedItems, element, weakVm.Get()?.MoreItems);
}
CreateEmptyHandler(newSections.Sum(s => s.Elements.Count) == 0);
weakRoot.Get()?.Reset(newSections);
}
catch
{
}
};
viewModel.Bind(x => x.GroupingFunction).Subscribe(_ => updateDel());
viewModel.Bind(x => x.FilteringFunction).Subscribe(_ => updateDel());
viewModel.Bind(x => x.SortingFunction).Subscribe(_ => updateDel());
//The CollectionViewModel binds all of the collection events from the observablecollection + more
//So just listen to it.
viewModel.CollectionChanged += (sender, e) => _dumb.InvokeOnMainThread(updateDel);
if (activateNow)
{
updateDel();
}
}
