65 lines
3.0 KiB
C#
65 lines
3.0 KiB
C#
using System.Collections.ObjectModel;
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using System.Collections.Specialized;
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using System.Windows;
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using MAX.Core.Logger;
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using Prism.Commands;
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using Prism.Mvvm;
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using Trade.Framework.Services;
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namespace Main.Test.ViewModels;
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internal class MainViewModel : BindableBase
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{
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private List<ItemInfo> data = DemoData.Create(10000);
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public List<ItemInfo> Data { get => data; private set => SetProperty(ref data, value); }
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private string actionMessage = "可右键查看详情、复制编码或切换状态；默认加载 10,000 行。";
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public string ActionMessage { get => actionMessage; private set => SetProperty(ref actionMessage, value); }
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private ObservableCollection<ItemInfo> selectedItems = new();
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public ObservableCollection<ItemInfo> SelectedItems
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{
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get => selectedItems;
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set
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{
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ArgumentNullException.ThrowIfNull(value);
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if (ReferenceEquals(selectedItems, value)) return;
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selectedItems.CollectionChanged -= SelectionChanged;
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SetProperty(ref selectedItems, value);
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selectedItems.CollectionChanged += SelectionChanged;
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RaisePropertyChanged(nameof(SelectedCount));
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}
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}
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public int SelectedCount => SelectedItems.Count;
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public int NetworkImageSize { get; set; }
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public DelegateCommand<ItemInfo> DetailCommand { get; }
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public DelegateCommand<ItemInfo> ConfirmCommand { get; }
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public DelegateCommand<ItemInfo> CopyCodeCommand { get; }
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public MainViewModel(ILoggerFacade logger, UserManager userManager)
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{
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selectedItems.CollectionChanged += SelectionChanged;
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DetailCommand = new(item => { if (item != null) ActionMessage = $"详情：{item.Code} · {item.Name} · ¥{item.Value} · {item.Buyer} · {item.Status}"; });
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ConfirmCommand = new(item =>
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{
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if (item == null) return;
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item.Status = item.Status == "已确认" ? "待处理" : "已确认";
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ActionMessage = $"已更新 {item.Code}：{item.Status}";
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});
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CopyCodeCommand = new(item =>
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{
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if (item == null) return;
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try { Clipboard.SetText(item.Code.ToString()); ActionMessage = $"已复制编码 {item.Code}"; }
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catch (System.Runtime.InteropServices.ExternalException) { ActionMessage = "剪贴板正忙，请重试。"; }
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});
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}
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private void SelectionChanged(object? sender, NotifyCollectionChangedEventArgs e) => RaisePropertyChanged(nameof(SelectedCount));
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public async Task LoadAsync(int count)
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{
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if (count is < 1 or > 50000) throw new ArgumentOutOfRangeException(nameof(count));
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var imageSize = NetworkImageSize;
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var rows = await Task.Run(() => DemoData.Create(count, imageSize));
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SelectedItems.Clear(); Data = rows;
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ActionMessage = $"已加载 {count:N0} 行；" + (imageSize == 0 ? "本地缩略图。" : $"Picsum {imageSize}×{imageSize} 网络随机图，可见时加载。每次重新加载使用新种子。冷 / 热测试以当前页面已加载状态为准。");
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}
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}
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