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Terminal UI V2, advanced binding

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This commit is contained in:
Ádám Kovács
2023-08-08 18:28:13 +02:00
parent 52536b569d
commit 2528487ff6
38 changed files with 911 additions and 199 deletions
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23
src/Library/TerminalUI/Controls/ListView.cs
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@@ -1,6 +1,7 @@
using System.Buffers;
using System.Collections.ObjectModel;
using DeclarativeProperty;
using TerminalUI.Models;
namespace TerminalUI.Controls;
@@ -9,7 +10,7 @@ public class ListView<TDataContext, TItem> : View<TDataContext>
private static readonly ArrayPool<ListViewItem<TItem>> ListViewItemPool = ArrayPool<ListViewItem<TItem>>.Shared;
private readonly List<IDisposable> _itemsDisposables = new();
private Func<IEnumerable<TItem>>? _getItems;
private Func<IEnumerable<TItem>?>? _getItems;
private object? _itemsSource;
private ListViewItem<TItem>[]? _listViewItems;
private int _listViewItemLength;
@@ -30,11 +31,20 @@ public class ListView<TDataContext, TItem> : View<TDataContext>
_itemsDisposables.Clear();
if (_itemsSource is IDeclarativeProperty<ObservableCollection<TItem>> observableDeclarativeProperty)
{
observableDeclarativeProperty.PropertyChanged += (_, _) => ApplicationContext?.EventLoop.RequestRerender();
_getItems = () => observableDeclarativeProperty.Value;
}
else if (_itemsSource is IDeclarativeProperty<ReadOnlyObservableCollection<TItem>> readOnlyObservableDeclarativeProperty)
{
readOnlyObservableDeclarativeProperty.PropertyChanged += (_, _) => ApplicationContext?.EventLoop.RequestRerender();
_getItems = () => readOnlyObservableDeclarativeProperty.Value;
}
else if (_itemsSource is IDeclarativeProperty<IEnumerable<TItem>> enumerableDeclarativeProperty)
{
enumerableDeclarativeProperty.PropertyChanged += (_, _) => ApplicationContext?.EventLoop.RequestRerender();
_getItems = () => enumerableDeclarativeProperty.Value;
}
else if (_itemsSource is ICollection<TItem> collection)
_getItems = () => collection;
else if (_itemsSource is TItem[] array)
@@ -54,18 +64,20 @@ public class ListView<TDataContext, TItem> : View<TDataContext>
public Func<ListViewItem<TItem>, IView?> ItemTemplate { get; set; } = DefaultItemTemplate;
protected override void DefaultRenderer()
protected override void DefaultRenderer(Position position)
{
var listViewItems = InstantiateItemViews();
var deltaY = 0;
foreach (var item in listViewItems)
{
item.Render();
item.Render(position with {PosY = position.PosY + deltaY++});
}
}
private Span<ListViewItem<TItem>> InstantiateItemViews()
{
if (_getItems is null)
var items = _getItems?.Invoke()?.ToList();
if (items is null)
{
if (_listViewItemLength != 0)
{
@@ -74,11 +86,10 @@ public class ListView<TDataContext, TItem> : View<TDataContext>
return _listViewItems;
}
var items = _getItems().ToList();
Span<ListViewItem<TItem>> listViewItems;
if (_listViewItems is null || _listViewItems.Length != items.Count)
if (_listViewItems is null || _listViewItemLength != items.Count)
{
var newListViewItems = ListViewItemPool.Rent(items.Count);
for (var i = 0; i < items.Count; i++)