38 lines
980 B
C#
38 lines
980 B
C#
using System;
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using System.Diagnostics.CodeAnalysis;
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using Avalonia.Controls;
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using CommunityToolkit.Mvvm.ComponentModel;
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namespace Nebula.Launcher.ViewModels;
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public abstract class ViewModelBase : ObservableObject
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{
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private readonly IServiceProvider _serviceProvider;
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public ViewModelBase()
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{
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AssertDesignMode();
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_serviceProvider = default!;
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}
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public ViewModelBase(IServiceProvider serviceProvider)
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{
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_serviceProvider = serviceProvider;
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}
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public bool TryGetViewModel(Type type,[NotNullWhen(true)] out ViewModelBase? viewModelBase)
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{
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viewModelBase = null;
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var vm = Design.IsDesignMode
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? Activator.CreateInstance(type)
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: _serviceProvider.GetService(type);
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if (vm is not ViewModelBase vmb) return false;
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viewModelBase = vmb;
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return true;
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}
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public void AssertDesignMode()
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{
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if (!Design.IsDesignMode) throw new Exception();
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}
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} |