90 lines
2.7 KiB
C#
90 lines
2.7 KiB
C#
using Avalonia;
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using Avalonia.Controls;
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using Avalonia.Interactivity;
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using Avalonia.Threading;
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using Irihi.Avalonia.Shared.Contracts;
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using Ursa.EventArgs;
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namespace Ursa.Controls.OverlayShared;
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public abstract class OverlayFeedbackElement: ContentControl
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{
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public static readonly StyledProperty<bool> IsClosedProperty =
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AvaloniaProperty.Register<OverlayFeedbackElement, bool>(nameof(IsClosed), defaultValue: true);
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public bool IsClosed
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{
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get => GetValue(IsClosedProperty);
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set => SetValue(IsClosedProperty, value);
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}
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static OverlayFeedbackElement()
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{
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FocusableProperty.OverrideDefaultValue<OverlayFeedbackElement>(true);
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DataContextProperty.Changed.AddClassHandler<OverlayFeedbackElement, object?>((o, e) => o.OnDataContextChange(e));
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ClosedEvent.AddClassHandler<OverlayFeedbackElement>((o,e)=>o.OnClosed(e));
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}
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private void OnClosed(ResultEventArgs _)
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{
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SetCurrentValue(IsClosedProperty,true);
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}
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public static readonly RoutedEvent<ResultEventArgs> ClosedEvent = RoutedEvent.Register<DrawerControlBase, ResultEventArgs>(
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nameof(Closed), RoutingStrategies.Bubble);
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public event EventHandler<ResultEventArgs> Closed
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{
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add => AddHandler(ClosedEvent, value);
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remove => RemoveHandler(ClosedEvent, value);
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}
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private void OnDataContextChange(AvaloniaPropertyChangedEventArgs<object?> args)
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{
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if (args.OldValue.Value is IDialogContext oldContext)
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{
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oldContext.RequestClose -= OnContextRequestClose;
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}
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if (args.NewValue.Value is IDialogContext newContext)
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{
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newContext.RequestClose += OnContextRequestClose;
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}
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}
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protected virtual void OnElementClosing(object? sender, object? args)
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{
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RaiseEvent(new ResultEventArgs(ClosedEvent, args));
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}
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private void OnContextRequestClose(object? sender, object? args)
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{
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RaiseEvent(new ResultEventArgs(ClosedEvent, args));
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}
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public Task<T?> ShowAsync<T>(CancellationToken? token = default)
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{
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var tcs = new TaskCompletionSource<T?>();
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token?.Register(() =>
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{
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Dispatcher.UIThread.Invoke(Close);
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});
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void OnCloseHandler(object? sender, ResultEventArgs? args)
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{
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if (args?.Result is T result)
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{
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tcs.SetResult(result);
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}
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else
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{
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tcs.SetResult(default);
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}
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RemoveHandler(ClosedEvent, OnCloseHandler);
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}
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AddHandler(ClosedEvent, OnCloseHandler);
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return tcs.Task;
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}
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public abstract void Close();
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} |