diff options
| -rw-r--r-- | Xamarin.Forms.Platform.Tizen/Cells/ViewCellRenderer.cs | 61 |
1 files changed, 52 insertions, 9 deletions
diff --git a/Xamarin.Forms.Platform.Tizen/Cells/ViewCellRenderer.cs b/Xamarin.Forms.Platform.Tizen/Cells/ViewCellRenderer.cs index 69065c8a..63287786 100644 --- a/Xamarin.Forms.Platform.Tizen/Cells/ViewCellRenderer.cs +++ b/Xamarin.Forms.Platform.Tizen/Cells/ViewCellRenderer.cs @@ -5,6 +5,7 @@ namespace Xamarin.Forms.Platform.Tizen { public class ViewCellRenderer : CellRenderer { + readonly Dictionary<EvasObject, ViewCell> _cacheCandidate = new Dictionary<EvasObject, ViewCell>(); public ViewCellRenderer() : base("full") { MainContentPart = "elm.swallow.content"; @@ -12,21 +13,42 @@ namespace Xamarin.Forms.Platform.Tizen protected string MainContentPart { get; set; } + protected override EvasObject OnReusableContent(Cell cell, string part, EvasObject old) + { + if (_cacheCandidate.ContainsKey(old)) + { + var viewCell = _cacheCandidate[old]; + var widget = (old as Widget); + if (widget != null) + widget.IsEnabled = true; + viewCell.BindingContext = cell.BindingContext; + return old; + } + return null; + } + protected override EvasObject OnGetContent(Cell cell, string part) { if (part == MainContentPart) { - var viewCell = cell as ViewCell; - if (viewCell != null) - { - var renderer = Platform.GetOrCreateRenderer(viewCell.View); - int height = (int)viewCell.RenderHeight; - height = height <= 0 ? FindCellContentHeight(viewCell) : height; + var viewCell = (ViewCell)cell; - renderer.NativeView.MinimumHeight = height; - return renderer.NativeView; + var listView = viewCell?.RealParent as ListView; + + // It is a condition for reusable the cell + if (listView != null && + listView.HasUnevenRows == false && + !(listView.ItemTemplate is DataTemplateSelector)) + { + return CreateReusableContent(viewCell); } - return null; + + var renderer = Platform.GetOrCreateRenderer(viewCell.View); + int height = (int)viewCell.RenderHeight; + height = height > 0 ? height : FindCellContentHeight(viewCell); + + renderer.NativeView.MinimumHeight = height; + return renderer.NativeView; } return null; } @@ -39,5 +61,26 @@ namespace Xamarin.Forms.Platform.Tizen } return base.OnCellPropertyChanged(cell, property, realizedView); } + + EvasObject CreateReusableContent(ViewCell viewCell) + { + var listView = viewCell.RealParent as ListView; + ViewCell duplicatedCell = (ViewCell)listView.ItemTemplate.CreateContent(); + duplicatedCell.BindingContext = viewCell.BindingContext; + duplicatedCell.Parent = listView; + + var renderer = Platform.GetOrCreateRenderer(duplicatedCell.View); + int height = (int)duplicatedCell.RenderHeight; + height = height > 0 ? height : FindCellContentHeight(duplicatedCell); + renderer.NativeView.MinimumHeight = height; + + _cacheCandidate[renderer.NativeView] = duplicatedCell; + renderer.NativeView.Deleted += (sender, e) => + { + _cacheCandidate.Remove((EvasObject)sender); + }; + + return renderer.NativeView; + } } } |