wpf自定义温度计控件

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Media.Imaging;
using System.Windows.Media.TextFormatting;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace DiaControlLibiray
{
    /// <summary>
    /// MercuryThermometer.xaml 的交互逻辑
    /// </summary>
    public partial class MercuryThermometer : UserControl
    {
        public MercuryThermometer()
        {