/// <summary>
/// Dispose the specified disposing.
/// </summary>
/// <returns>The dispose.</returns>
/// <param name="disposing">If set to <c>true</c> disposing.</param>
protected override void Dispose(bool disposing)
{
_parentPage.Appearing -= ParentPageAppearing;
if (_disposed)
{
return;
}
if (disposing)
{
_contentSizeObserver.Dispose();
_contentSizeObserver = null;
Element.CollectionChanged -= OnCollectionChanged;
Element.SectionCollectionChanged -= OnSectionCollectionChanged;
Element.SectionPropertyChanged -= OnSectionPropertyChanged;
_insetTracker?.Dispose();
_insetTracker = null;
foreach (UIView subview in Subviews)
{
DisposeSubviews(subview);
}
_tableview = null;
}
_disposed = true;
base.Dispose(disposing);
}
/// <summary>
/// Ons the element changed.
/// </summary>
/// <param name="e">E.</param>
protected override void OnElementChanged(ElementChangedEventArgs <Shared.sv.SettingsView> e)
{
base.OnElementChanged(e);
if (e.OldElement != null)
{
e.OldElement.CollectionChanged -= OnCollectionChanged;
e.OldElement.SectionCollectionChanged -= OnSectionCollectionChanged;
e.OldElement.SectionPropertyChanged -= OnSectionPropertyChanged;
}
if (e.NewElement != null)
{
_tableview = new UITableView(CGRect.Empty, UITableViewStyle.Grouped);
if (UIDevice.CurrentDevice.CheckSystemVersion(11, 0))
{
_tableview.DragDelegate = this;
_tableview.DropDelegate = this;
_tableview.DragInteractionEnabled = true;
_tableview.Source = new SettingsTableSource(Element);
}
else
{
_tableview.Editing = true;
_tableview.AllowsSelectionDuringEditing = true;
// When Editing is true, for some reason, UITableView top margin is displayed.
// force removing the margin by the following code.
_topInset = 36;
_tableview.ContentInset = new UIEdgeInsets(-_topInset, 0, 0, 0);
_tableview.Source = new SettingsLagacyTableSource(Element);
}
SetNativeControl(_tableview);
_tableview.ScrollEnabled = true;
_tableview.RowHeight = UITableView.AutomaticDimension;
_tableview.KeyboardDismissMode = UIScrollViewKeyboardDismissMode.OnDrag;
_tableview.CellLayoutMarginsFollowReadableWidth = false;
_tableview.SectionHeaderHeight = UITableView.AutomaticDimension;
_tableview.EstimatedSectionHeaderHeight = UITableView.AutomaticDimension;
_tableview.SectionFooterHeight = UITableView.AutomaticDimension;
_tableview.EstimatedSectionFooterHeight = UITableView.AutomaticDimension;
_tableview.RegisterClassForHeaderFooterViewReuse(typeof(TextHeaderView), TextHeaderId);
_tableview.RegisterClassForHeaderFooterViewReuse(typeof(TextFooterView), TextFooterId);
_tableview.RegisterClassForHeaderFooterViewReuse(typeof(CustomHeaderView), CustomHeaderId);
_tableview.RegisterClassForHeaderFooterViewReuse(typeof(CustomFooterView), CustomFooterId);
e.NewElement.CollectionChanged += OnCollectionChanged;
e.NewElement.SectionCollectionChanged += OnSectionCollectionChanged;
e.NewElement.SectionPropertyChanged += OnSectionPropertyChanged;
UpdateBackgroundColor();
UpdateSeparator();
UpdateRowHeight();
Element elm = Element;
while (elm != null)
{
elm = elm.Parent;
if (elm is Page)
{
break;
}
}
_parentPage = elm as Page;
_parentPage.Appearing += ParentPageAppearing;
_insetTracker = new KeyboardInsetTracker(_tableview,
() => Control.Window,
insets => Control.ContentInset = Control.ScrollIndicatorInsets = insets,
point =>
{
CGPoint offset = Control.ContentOffset;
offset.Y += point.Y;
Control.SetContentOffset(offset, true);
}
);
_contentSizeObserver = _tableview.AddObserver("contentSize", NSKeyValueObservingOptions.New, OnContentSizeChanged);
}
}
