78 lines
2.2 KiB
C#
78 lines
2.2 KiB
C#
using System;
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using System.Collections.Generic;
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using Avalonia;
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using Avalonia.Controls;
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using Avalonia.Controls.Presenters;
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using Avalonia.Controls.Templates;
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using Avalonia.Markup.Xaml.Templates;
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using Avalonia.Platform;
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using Notes.ViewModels;
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namespace Notes;
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// public class ViewLocator : IDataTemplate
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// {
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// Control? ITemplate<object?, Control?>.Build(object? param)
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// {
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// if (param == null) throw new NullReferenceException(nameof(param));
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// var name = param.GetType().FullName!.Replace("ViewModel", "View");
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// var type = Type.GetType(name);
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//
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// if (type != null)
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// {
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// return (Control?)Activator.CreateInstance(type);
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// }
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// else
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// {
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// return new TextBlock { Text = "1Not Found: " + name };
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// }
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// }
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//
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// public bool Match(object? data)
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// {
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// return data is ViewModelBase;
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// }
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// }
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public sealed class ViewSelector : AvaloniaObject, IDataTemplate
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{
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private static readonly Dictionary<object, Control?> controls = new Dictionary<object, Control?>();
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public ViewSelector()
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{
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}
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/// <summary>
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/// 根据ViewModel 查找view ，这里直接拿到资源文件夹的资源来构建
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/// </summary>
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/// <param name="param"></param>
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/// <returns></returns>
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/// <exception cref="NullReferenceException"></exception>
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public Control? Build(object? param)
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{
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if (param == null) throw new NullReferenceException(nameof(param));
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if (controls.TryGetValue(param, out var control))
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{
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return control;
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}
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var name = param.GetType().FullName!.Replace("ViewModel", "View").Replace("DesignData","");
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var type = Type.GetType(name);
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if (type != null)
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{
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var instance = (Control?)Activator.CreateInstance(type);
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controls[param] = instance;
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return instance;
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}
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else
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{
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return new TextBlock { Text = "2Not Found: " + name };
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}
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}
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public bool Match(object? data)
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{
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return data is ViewModelBase;
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}
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}
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