55 lines
1.7 KiB
C#
55 lines
1.7 KiB
C#
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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namespace InSituLaboratory.Views.Pages
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{
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/// <summary>
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/// RelayView.xaml 的交互逻辑
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/// </summary>
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public partial class RelayView : UserControl
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{
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public RelayView()
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{
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InitializeComponent();
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}
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/// <summary>
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/// 支持鼠标滚轮上下滚动
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/// </summary>
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/// <param name="sender"></param>
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/// <param name="e"></param>
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private void ScrollViewer_PreviewMouseWheel(object sender, MouseWheelEventArgs e)
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{
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ScrollViewer viewer = sv; //sv 为Scrollview的名字，在Xaml文件中定义。
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if (viewer == null) return;
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double num = Math.Abs((int)(e.Delta / 2));
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double offset = 0.0;
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if (e.Delta > 0)
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{
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offset = Math.Max((double)0.0, (double)(viewer.VerticalOffset - num));//viewer.VerticalOffset获取包含滚动内容的垂直偏移量的值。
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}
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else
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{
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offset = Math.Min(viewer.ScrollableHeight, viewer.VerticalOffset + num);
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}
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if (offset != viewer.VerticalOffset)
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{
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viewer.ScrollToVerticalOffset(offset);//将 ScrollViewer 内的内容滚动到指定的垂直偏移量位置。
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e.Handled = true;
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}
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}
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}
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}
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