chuan/Ursa.Avalonia
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feat: add async command support.

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This commit is contained in:
Dong Bin
2025-04-18 02:37:27 +08:00
parent e9a94798e3
commit 5da5e0626a
3 changed files with 57 additions and 13 deletions
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48
src/Ursa/Controls/PopConfirm/PopConfirm.cs
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@@ -1,9 +1,11 @@
using System.ComponentModel;
using System.Windows.Input;
using Avalonia;
using Avalonia.Controls;
using Avalonia.Controls.Presenters;
using Avalonia.Controls.Primitives;
using Avalonia.Controls.Templates;
using Avalonia.Interactivity;
using Avalonia.LogicalTree;
using Irihi.Avalonia.Shared.Helpers;
@@ -11,6 +13,14 @@ namespace Ursa.Controls;
public class PopConfirm: ContentControl
{
public const string PART_ConfirmButton = "PART_ConfirmButton";
public const string PART_CancelButton = "PART_CancelButton";
public const string PART_Popup = "PART_Popup";
private Button? _confirmButton;
private Button? _cancelButton;
private Popup? _popup;
public static readonly StyledProperty<object?> PopupHeaderProperty = AvaloniaProperty.Register<PopConfirm, object?>(
nameof(PopupHeader));
@@ -100,14 +110,7 @@ public class PopConfirm: ContentControl
private void OnCommandChanged(AvaloniaPropertyChangedEventArgs<ICommand?> args)
{
var newValue = args.GetNewValue<ICommand>();
newValue.CanExecuteChanged += (sender, e) =>
{
if (args.Sender is PopConfirm popconfirm)
{
var b = newValue.CanExecute(this.ConfirmCommandParameter);
}
};
}
public PopConfirm()
@@ -129,8 +132,37 @@ public class PopConfirm: ContentControl
protected override void OnApplyTemplate(TemplateAppliedEventArgs e)
{
base.OnApplyTemplate(e);
_confirmButton = e.NameScope.Find<Button>(PART_ConfirmButton);
_cancelButton = e.NameScope.Find<Button>(PART_CancelButton);
_popup = e.NameScope.Find<Popup>(PART_Popup);
Button.ClickEvent.AddHandler(OnButtonClicked, _confirmButton, _cancelButton);
}
private void OnButtonClicked(object sender, RoutedEventArgs e)
{
// This is a hack for MVVM toolkit that uses INotifyPropertyChanged for async command. It counts the number of
// IsRunning property changes to determine when the command is finished.
if (sender is Button button && button.Command is INotifyPropertyChanged inpc)
{
var count = 0;
void OnCommandPropertyChanged(object? sender, PropertyChangedEventArgs args)
{
if (args.PropertyName != "IsRunning") return;
count++;
if (count != 2) return;
inpc.PropertyChanged -= OnCommandPropertyChanged;
_popup?.SetValue(Popup.IsOpenProperty, false);
}
inpc.PropertyChanged += OnCommandPropertyChanged;
}
else
{
_popup?.SetValue(Popup.IsOpenProperty, false);
}
}
private IDisposable? _childChangeDisposable;
protected override bool RegisterContentPresenter(ContentPresenter presenter)