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feat: implement singleton pattern for PaletteDemoViewModel and add initialization check

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This commit is contained in:
Dong Bin
2026-04-24 18:17:40 +08:00
parent 496aef2126
commit 897a71aa13
2 changed files with 10 additions and 5 deletions
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10
demo/Semi.Avalonia.Demo/Pages/PaletteDemo.axaml.cs
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@@ -12,14 +12,16 @@ public partial class PaletteDemo : UserControl
public PaletteDemo() public PaletteDemo()
{ {
InitializeComponent(); InitializeComponent();
this.DataContext = new PaletteDemoViewModel(); this.DataContext = PaletteDemoViewModel.Instance.Value;
} }
protected override async void OnApplyTemplate(TemplateAppliedEventArgs e) protected override async void OnApplyTemplate(TemplateAppliedEventArgs e)
{ {
base.OnApplyTemplate(e); base.OnApplyTemplate(e);
PaletteDemoViewModel? vm = this.DataContext as PaletteDemoViewModel; if (this.DataContext is PaletteDemoViewModel vm && !vm.IsInitialized)
await Dispatcher.UIThread.InvokeAsync(() => { vm?.InitializeResources(); }); {
await Dispatcher.UIThread.InvokeAsync(() => { vm?.InitializeResources(); });
}
} }
public async Task Copy(object? o) public async Task Copy(object? o)
@@ -31,4 +33,4 @@ public partial class PaletteDemo : UserControl
await c.SetTextAsync(o.ToString()); await c.SetTextAsync(o.ToString());
} }
} }
} }

5
demo/Semi.Avalonia.Demo/ViewModels/PaletteDemoViewModel.cs
View File

@@ -14,6 +14,8 @@ namespace Semi.Avalonia.Demo.ViewModels;
public partial class PaletteDemoViewModel : ObservableObject public partial class PaletteDemoViewModel : ObservableObject
{ {
public static Lazy<PaletteDemoViewModel> Instance { get; } = new(() => new PaletteDemoViewModel());
public bool IsInitialized { get; private set; }
private readonly string[] _predefinedColorNames = private readonly string[] _predefinedColorNames =
[ [
"Red", "Pink", "Purple", "Violet", "Indigo", "Red", "Pink", "Purple", "Violet", "Indigo",
@@ -44,6 +46,7 @@ public partial class PaletteDemoViewModel : ObservableObject
InitializePalette(); InitializePalette();
InitializeFunctionalColors(); InitializeFunctionalColors();
InitializeShadows(); InitializeShadows();
IsInitialized = true;
} }
private void InitializePalette() private void InitializePalette()
@@ -289,4 +292,4 @@ public partial class ShadowGroupViewModel : ObservableObject
} }
} }
} }
} }