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using System;
using System.Collections.Generic;
using Foundation;
using UIKit;
namespace Xamarin.Forms.Platform.iOS
{
public class TableViewModelRenderer : UITableViewSource
{
readonly Dictionary<nint, Cell> _headerCells = new Dictionary<nint, Cell>();
protected ITableViewController Controller => View;
protected bool HasBoundGestures;
protected UITableView Table;
protected TableView View;
public TableViewModelRenderer(TableView model)
{
View = model;
Controller.ModelChanged += (s, e) =>
{
if (Table != null)
Table.ReloadData();
};
AutomaticallyDeselect = true;
}
public bool AutomaticallyDeselect { get; set; }
public override UITableViewCell GetCell(UITableView tableView, NSIndexPath indexPath)
{
var cell = Controller.Model.GetCell(indexPath.Section, indexPath.Row);
var nativeCell = CellTableViewCell.GetNativeCell(tableView, cell);
return nativeCell;
}
public override nfloat GetHeightForHeader(UITableView tableView, nint section)
{
if (!_headerCells.ContainsKey((int)section))
_headerCells[section] = Controller.Model.GetHeaderCell((int)section);
var result = _headerCells[section];
return result == null ? UITableView.AutomaticDimension : (nfloat)result.Height;
}
public override UIView GetViewForHeader(UITableView tableView, nint section)
{
if (!_headerCells.ContainsKey((int)section))
_headerCells[section] = Controller.Model.GetHeaderCell((int)section);
var result = _headerCells[section];
if (result != null)
{
var reusable = tableView.DequeueReusableCell(result.GetType().FullName);
var cellRenderer = Registrar.Registered.GetHandler<CellRenderer>(result.GetType());
return cellRenderer.GetCell(result, reusable, Table);
}
return null;
}
public void LongPress(UILongPressGestureRecognizer gesture)
{
var point = gesture.LocationInView(Table);
var indexPath = Table.IndexPathForRowAtPoint(point);
if (indexPath == null)
return;
Controller.Model.RowLongPressed(indexPath.Section, indexPath.Row);
}
public override nint NumberOfSections(UITableView tableView)
{
BindGestures(tableView);
return Controller.Model.GetSectionCount();
}
public override void RowSelected(UITableView tableView, NSIndexPath indexPath)
{
Controller.Model.RowSelected(indexPath.Section, indexPath.Row);
if (AutomaticallyDeselect)
tableView.DeselectRow(indexPath, true);
}
public override nint RowsInSection(UITableView tableview, nint section)
{
return Controller.Model.GetRowCount((int)section);
}
public override string[] SectionIndexTitles(UITableView tableView)
{
return Controller.Model.GetSectionIndexTitles();
}
public override string TitleForHeader(UITableView tableView, nint section)
{
return Controller.Model.GetSectionTitle((int)section);
}
void BindGestures(UITableView tableview)
{
if (HasBoundGestures)
return;
HasBoundGestures = true;
var gesture = new UILongPressGestureRecognizer(LongPress);
gesture.MinimumPressDuration = 2;
tableview.AddGestureRecognizer(gesture);
var dismissGesture = new UITapGestureRecognizer(Tap);
dismissGesture.CancelsTouchesInView = false;
tableview.AddGestureRecognizer(dismissGesture);
Table = tableview;
}
void Tap(UITapGestureRecognizer gesture)
{
gesture.View.EndEditing(true);
}
}
public class UnEvenTableViewModelRenderer : TableViewModelRenderer
{
public UnEvenTableViewModelRenderer(TableView model) : base(model)
{
}
public override nfloat GetHeightForRow(UITableView tableView, NSIndexPath indexPath)
{
var cell = View.Model.GetCell(indexPath.Section, indexPath.Row);
var h = cell.Height;
if (View.RowHeight == -1 && h == -1 && cell is ViewCell && Forms.IsiOS8OrNewer) {
return UITableView.AutomaticDimension;
} else if (h == -1)
return tableView.RowHeight;
return (nfloat)h;
}
}
}
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