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Trigger textbox changes in settings on lost focus (#289)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,63 @@ | ||
| using System; | ||
| using Avalonia; | ||
| using Avalonia.Controls; | ||
| using Avalonia.Data; | ||
| using Avalonia.Interactivity; | ||
| using Avalonia.Xaml.Interactivity; | ||
|
|
||
| namespace LightBulb.Behaviors; | ||
|
|
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| public class LostFocusUpdateBindingBehavior : Behavior<TextBox> | ||
| { | ||
| public static readonly StyledProperty<string?> TextProperty = AvaloniaProperty.Register< | ||
| LostFocusUpdateBindingBehavior, | ||
| string? | ||
| >(nameof(Text), defaultBindingMode: BindingMode.TwoWay); | ||
|
|
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| static LostFocusUpdateBindingBehavior() | ||
| { | ||
| TextProperty.Changed.Subscribe(args => | ||
| { | ||
| if (args.Sender is LostFocusUpdateBindingBehavior behavior) | ||
| behavior.OnBindingValueChanged(); | ||
| }); | ||
| } | ||
|
|
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| public string? Text | ||
| { | ||
| get => GetValue(TextProperty); | ||
| set => SetValue(TextProperty, value); | ||
| } | ||
|
|
||
| protected override void OnAttached() | ||
| { | ||
| if (AssociatedObject is null) | ||
| return; | ||
|
|
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| AssociatedObject.LostFocus += OnLostFocus; | ||
| base.OnAttached(); | ||
| } | ||
|
|
||
| protected override void OnDetaching() | ||
| { | ||
| if (AssociatedObject is null) | ||
| return; | ||
|
|
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| AssociatedObject.LostFocus -= OnLostFocus; | ||
| base.OnDetaching(); | ||
| } | ||
|
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| private void OnLostFocus(object? sender, RoutedEventArgs e) | ||
| { | ||
| if (AssociatedObject is null) | ||
| return; | ||
|
|
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| Text = AssociatedObject.Text; | ||
| } | ||
|
|
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| private void OnBindingValueChanged() | ||
| { | ||
| if (AssociatedObject != null) | ||
| AssociatedObject.Text = Text; | ||
| } | ||
| } |
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