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using System;
using System.Collections;
using System.Collections.Specialized;
using System.Linq;
using Cirrious.CrossCore.Core;
using Cirrious.CrossCore.WeakSubscription;
using Cirrious.MvvmCross.Binding.Attributes;
using Cirrious.MvvmCross.Binding.BindingContext;
using Cirrious.MvvmCross.Binding.ExtensionMethods;
using MonoMac.AppKit;
using MonoMac.Foundation;
namespace CentraStage.Mac
{
public class CsTableViewSource : NSTableViewSource
{
IEnumerable itemsSource;
IDisposable subscription;
NSTableView tableView;
public CsTableViewSource (NSTableView tableView): base()
{
this.tableView = tableView;
}
public override int GetRowCount (NSTableView tableView)
{
return ItemsSource.Count ();
}
[MvxSetToNullAfterBinding]
public virtual IEnumerable ItemsSource
{
get { return itemsSource; }
set
{
if (itemsSource == value)
return;
if (subscription != null)
{
subscription.Dispose();
subscription = null;
}
itemsSource = value;
var collectionChanged = itemsSource as INotifyCollectionChanged;
if (collectionChanged != null)
{
subscription = collectionChanged.WeakSubscribe(CollectionChangedOnCollectionChanged);
}
ReloadTableData();
}
}
void ReloadTableData ()
{
tableView.ReloadData ();
}
NSView GetOrCreateViewFor (NSTableView tableView, NSTableColumn tableColumn)
{
var view = tableView.MakeView (tableColumn.Identifier, this);
var bindableColumn = tableColumn as CsTableColumn;
if (bindableColumn != null){
if (view == null)
view = new CsTableCellView (bindableColumn.BindingText);
else {
IMvxBindingContextOwner bindableView = view as IMvxBindingContextOwner;
bindableView.CreateBindingContext (bindableColumn.BindingText);
}
}
return view;
}
public override NSView GetViewForItem (NSTableView tableView, NSTableColumn tableColumn, int row)
{
if (ItemsSource == null)
return null;
var item = ItemsSource.ElementAt(row);
var view = GetOrCreateViewFor (tableView, tableColumn);
var bindable = view as IMvxDataConsumer;
if (bindable != null)
bindable.DataContext = item;
return view;
}
protected virtual void CollectionChangedOnCollectionChanged(object sender, NotifyCollectionChangedEventArgs args)
{
TryDoAnimatedChange (args);
}
protected static NSIndexSet CreateNSIndexSet(int startingPosition, int count)
{
return NSIndexSet.FromArray (Enumerable.Range(startingPosition, count).ToArray());
}
protected bool TryDoAnimatedChange(NotifyCollectionChangedEventArgs args)
{
switch (args.Action)
{
case NotifyCollectionChangedAction.Add:
{
var newIndexSet = CreateNSIndexSet(args.NewStartingIndex, args.NewItems.Count);
tableView.InsertRows (newIndexSet, NSTableViewAnimation.Fade);
return true;
}
case NotifyCollectionChangedAction.Remove:
{
var newIndexSet = CreateNSIndexSet(args.OldStartingIndex, args.OldItems.Count);
tableView.RemoveRows (newIndexSet, NSTableViewAnimation.Fade);
return true;
}
case NotifyCollectionChangedAction.Move:
{
if (args.NewItems.Count != 1 && args.OldItems.Count != 1)
return false;
tableView.MoveRow (args.OldStartingIndex, args.NewStartingIndex);
return true;
}
case NotifyCollectionChangedAction.Replace:
{
// if (args.NewItems.Count != args.OldItems.Count)
// return false;
//
// var indexPath = NSIndexPath.FromItemSection(args.NewStartingIndex, 0);
// TableView.ReloadRows(new[]
// {
// indexPath
// }, UITableViewRowAnimation.Fade);
tableView.ReloadData ();
return true;
}
default:
return false;
}
}
// protected static NSIndexPath[] CreateNSIndexPathArray(int startingPosition, int count)
// {
// var newIndexPaths = new NSIndexPath[count];
// for (var i = 0; i < count; i++)
// {
// newIndexPaths[i] = NSIndexPath.FromItemSection(i + startingPosition, 0);
// }
// return newIndexPaths;
// }
// public override int RowsInSection(NSTableView tableview, int section)
// {
// if (ItemsSource == null)
// return 0;
//
// return ItemsSource.Count();
// }
}
}
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