102 lines
2.6 KiB
C#
102 lines
2.6 KiB
C#
using _29WxOrderWpf.Ctrls.PDDInvoice.ViewModels;
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using CefSharp.DevTools.Overlay;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Data;
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using System.Windows.Documents;
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using System.Windows.Input;
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using System.Windows.Media;
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using System.Windows.Media.Imaging;
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using System.Windows.Navigation;
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using System.Windows.Shapes;
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using System.Windows.Threading;
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namespace _29WxOrderWpf.Ctrls.PDDInvoice;
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/// <summary>
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/// PDDInvoiceView.xaml 的交互逻辑
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/// </summary>
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public partial class PDDInvoiceView : UserControl
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{
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private PDDInvoiceViewModel vm = new PDDInvoiceViewModel();
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public PDDInvoiceView()
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{
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InitializeComponent();
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DataContext = vm;
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vm.BatchInvoiceChanged += Vm_BatchInvoiceChanged;
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}
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private void Vm_BatchInvoiceChanged(object sender, int e)
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{
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ScrollToCurrent(e);
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}
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private void txtSearch_KeyDown(object sender, KeyEventArgs e)
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{
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if (e.Key == Key.Enter && DataContext is PDDInvoiceViewModel viewModel)
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{
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viewModel.SearchCommand.Execute(null);
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}
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}
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private DispatcherTimer _scrollStopTimer;
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private void ScrollViewer_ScrollChanged(object sender, ScrollChangedEventArgs e)
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{
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// 每次滚动都重置计时器
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if (_scrollStopTimer == null)
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{
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_scrollStopTimer = new DispatcherTimer
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{
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Interval = TimeSpan.FromMilliseconds(100) // 200ms 内无滚动视为停止
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};
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_scrollStopTimer.Tick += ScrollStopTimer_Tick;
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}
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_scrollStopTimer.Stop();
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_scrollStopTimer.Start();
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(DataContext as PDDInvoiceViewModel).IsLoadImage = false;
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}
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private void ScrollStopTimer_Tick(object sender, EventArgs e)
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{
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_scrollStopTimer.Stop();
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// 用 Background 优先级设置，避免和当前这一帧的滚动惯性/渲染争抢，
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// 让 UI 线程先把滚动动画收尾，再去处理这一波图片加载触发
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Dispatcher.BeginInvoke(DispatcherPriority.Background, new Action(() =>
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{
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vm.IsLoadImage = true;
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}));
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}
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private void ScrollToCurrent(int index)
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{
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if (itemsControl == null) return;
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// 方案A：逻辑滚动（你的 CanContentScroll=True，推荐）
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var sv = itemsControl.Template.FindName("PART_ScrollViewer", itemsControl) as ScrollViewer;
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if (sv != null)
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{
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if (index >= 0)
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{
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sv.ScrollToVerticalOffset(index - 1);
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return;
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}
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}
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// 方案B：兜底，用容器 BringIntoView
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itemsControl.UpdateLayout();
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var container = itemsControl.ItemContainerGenerator
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.ContainerFromItem(vm.SelectedOrder) as FrameworkElement;
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container?.BringIntoView();
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}
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} |