public ListViewDataSource(ListViewDataSource source)
{
_uiTableViewController = source._uiTableViewController;
List = source.List;
_uiTableView = source._uiTableView;
_defaultSectionHeight = source._defaultSectionHeight;
_selectionFromNative = source._selectionFromNative;
Counts = new Dictionary <int, int>();
}
public ListViewDataSource(ListView list, FormsUITableViewController uiTableViewController)
{
_uiTableViewController = uiTableViewController;
_uiTableView = uiTableViewController.TableView;
_defaultSectionHeight = DefaultRowHeight;
List = list;
List.ItemSelected += OnItemSelected;
UpdateShortNameListener();
Counts = new Dictionary <int, int>();
}
protected override void Dispose(bool disposing)
{
if (_disposed)
{
return;
}
if (disposing)
{
if (List != null)
{
List.ItemSelected -= OnItemSelected;
List = null;
}
_templateToId = null;
_uiTableView = null;
_uiTableViewController = null;
}
_disposed = true;
base.Dispose(disposing);
}
protected override void Dispose(bool disposing)
{
// check inset tracker for null to
if (disposing && _insetTracker != null)
{
_insetTracker.Dispose();
_insetTracker = null;
var viewsToLookAt = new Stack <UIView>(Subviews);
while (viewsToLookAt.Count > 0)
{
var view = viewsToLookAt.Pop();
var viewCellRenderer = view as ViewCellRenderer.ViewTableCell;
if (viewCellRenderer != null)
{
viewCellRenderer.Dispose();
}
else
{
foreach (var child in view.Subviews)
{
viewsToLookAt.Push(child);
}
}
}
if (Element != null)
{
var templatedItems = TemplatedItemsView.TemplatedItems;
templatedItems.CollectionChanged -= OnCollectionChanged;
templatedItems.GroupedCollectionChanged -= OnGroupedCollectionChanged;
}
if (_tableViewController != null)
{
_tableViewController.Dispose();
_tableViewController = null;
}
}
if (disposing)
{
if (_headerRenderer != null)
{
var platform = _headerRenderer.Element.Platform as Platform;
if (platform != null)
{
platform.DisposeModelAndChildrenRenderers(_headerRenderer.Element);
}
_headerRenderer = null;
}
if (_footerRenderer != null)
{
var platform = _footerRenderer.Element.Platform as Platform;
if (platform != null)
{
platform.DisposeModelAndChildrenRenderers(_footerRenderer.Element);
}
_footerRenderer = null;
}
var headerView = Controller?.HeaderElement as VisualElement;
if (headerView != null)
{
headerView.MeasureInvalidated -= OnHeaderMeasureInvalidated;
}
Control?.TableHeaderView?.Dispose();
var footerView = Controller?.FooterElement as VisualElement;
if (footerView != null)
{
footerView.MeasureInvalidated -= OnFooterMeasureInvalidated;
}
Control?.TableFooterView?.Dispose();
}
base.Dispose(disposing);
}
public UnevenListViewDataSource(ListView list, FormsUITableViewController uiTableViewController) : base(list, uiTableViewController)
{
}
protected override void OnElementChanged(ElementChangedEventArgs <ListView> e)
{
_requestedScroll = null;
if (e.OldElement != null)
{
var controller = (IListViewController)e.OldElement;
var headerView = (VisualElement)controller.HeaderElement;
if (headerView != null)
{
headerView.MeasureInvalidated -= OnHeaderMeasureInvalidated;
}
var footerView = (VisualElement)controller.FooterElement;
if (footerView != null)
{
footerView.MeasureInvalidated -= OnFooterMeasureInvalidated;
}
controller.ScrollToRequested -= OnScrollToRequested;
var templatedItems = ((ITemplatedItemsView <Cell>)e.OldElement).TemplatedItems;
templatedItems.CollectionChanged -= OnCollectionChanged;
templatedItems.GroupedCollectionChanged -= OnGroupedCollectionChanged;
}
if (e.NewElement != null)
{
if (Control == null)
{
_tableViewController = new FormsUITableViewController(e.NewElement);
SetNativeControl(_tableViewController.TableView);
if (Forms.IsiOS9OrNewer)
{
Control.CellLayoutMarginsFollowReadableWidth = false;
}
_insetTracker = new KeyboardInsetTracker(_tableViewController.TableView, () => Control.Window, insets => Control.ContentInset = Control.ScrollIndicatorInsets = insets, point =>
{
var offset = Control.ContentOffset;
offset.Y += point.Y;
Control.SetContentOffset(offset, true);
});
}
_shouldEstimateRowHeight = true;
var controller = (IListViewController)e.NewElement;
controller.ScrollToRequested += OnScrollToRequested;
var templatedItems = ((ITemplatedItemsView <Cell>)e.NewElement).TemplatedItems;
templatedItems.CollectionChanged += OnCollectionChanged;
templatedItems.GroupedCollectionChanged += OnGroupedCollectionChanged;
UpdateRowHeight();
Control.Source = _dataSource = e.NewElement.HasUnevenRows ? new UnevenListViewDataSource(e.NewElement, _tableViewController) : new ListViewDataSource(e.NewElement, _tableViewController);
UpdateEstimatedRowHeight();
UpdateHeader();
UpdateFooter();
UpdatePullToRefreshEnabled();
UpdateIsRefreshing();
UpdateSeparatorColor();
UpdateSeparatorVisibility();
var selected = e.NewElement.SelectedItem;
if (selected != null)
{
_dataSource.OnItemSelected(null, new SelectedItemChangedEventArgs(selected));
}
}
base.OnElementChanged(e);
}
protected override void Dispose(bool disposing)
{
if (_disposed)
{
return;
}
if (disposing)
{
if (_insetTracker != null)
{
_insetTracker.Dispose();
_insetTracker = null;
}
foreach (UIView subview in Subviews)
{
DisposeSubviews(subview);
}
if (Element != null)
{
var templatedItems = TemplatedItemsView.TemplatedItems;
templatedItems.CollectionChanged -= OnCollectionChanged;
templatedItems.GroupedCollectionChanged -= OnGroupedCollectionChanged;
}
if (_dataSource != null)
{
_dataSource.Dispose();
_dataSource = null;
}
if (_tableViewController != null)
{
_tableViewController.Dispose();
_tableViewController = null;
}
if (_headerRenderer != null)
{
var platform = _headerRenderer.Element?.Platform as Platform;
platform?.DisposeModelAndChildrenRenderers(_headerRenderer.Element);
_headerRenderer = null;
}
if (_footerRenderer != null)
{
var platform = _footerRenderer.Element?.Platform as Platform;
platform?.DisposeModelAndChildrenRenderers(_footerRenderer.Element);
_footerRenderer = null;
}
var headerView = Controller?.HeaderElement as VisualElement;
if (headerView != null)
{
headerView.MeasureInvalidated -= OnHeaderMeasureInvalidated;
}
Control?.TableHeaderView?.Dispose();
var footerView = Controller?.FooterElement as VisualElement;
if (footerView != null)
{
footerView.MeasureInvalidated -= OnFooterMeasureInvalidated;
}
Control?.TableFooterView?.Dispose();
}
_disposed = true;
base.Dispose(disposing);
}