midFrequence开发笔记(1)

1、仪表盘资料网站    http://www.beaugauge.com/

2、添加仪表盘步骤（参考CSDN https://blog.csdn.net/xiefei20098648/article/details/66970985）

      Step1. 新建一个空的WPF工程命名为，在新的工程中完成CircularGauge.dll的添加。

      Step2.引用CircularGauge.dll并添加CircularGauge的命名空间。 

      ①添加引用：右击Galvanometer的“引用”，选择“添加引用”弹出下面的窗口，点击确定完成dll的添加。 

      Step3.增加绘制电流表的XML代码。

<gauge:CircularGaugeControl x:Name="myGauge1"
            Radius="150" 
            ScaleRadius="110" 
            ScaleStartAngle="120" 
            ScaleSweepAngle="300"
            PointerLength="85" 
            PointerCapRadius="35" 
            MinValue="0" 
            MaxValue="1000" 
            MajorDivisionsCount="10" 
            MinorDivisionsCount="5" 
            CurrentValue="{Binding Score}"
            ImageSource="Pics/Ampere.ico"
            ImageSize="40,40"
            RangeIndicatorThickness="8"
            RangeIndicatorRadius="120"
            RangeIndicatorLightRadius="10"
            RangeIndicatorLightOffset="80"
            ScaleLabelRadius="90"
            ScaleLabelSize="40,20"
            ScaleLabelFontSize="10"
            ScaleLabelForeground="LightGray"
            MajorTickSize="10,3"
            MinorTickSize="3,1"
            MajorTickColor="LightGray"
            MinorTickColor="LightGray"
            ImageOffset="-50"
            GaugeBackgroundColor="Black"
            PointerThickness ="16"
            OptimalRangeStartValue="300"
            OptimalRangeEndValue="700" 
            DialTextOffset="40" 
            DialText="mA"
            DialTextColor="Black">
        </gauge:CircularGaugeControl>

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下面重点讲解下CircularGauge控件的几个重要参数： 
- Background 背景色设置，背景颜色会自动创建一个渐变和玻璃效果。 
- ScaleRadius 刻度位置的半径值，根据自己需要进行调制半径值达到调整刻度位置的目的。 
- ScaleLabelRadius 刻度标签的半径值。 
- RangeIndicatorRadius 刻度范围指示器的半径、 
- ImageOffset 外置图片的位置偏移。 
- DialTextOffset 电表标识的文本控件位置偏移。 
- DialText 电表标识的文本内容，比如本文设置为 “mA”。 
- RangeIndicatorLightOffset 范围指示灯的位置偏移。 
- OptimalRangeStartValue 电流值最佳范围的起始值，与OptimalRangeEndValue一起搭配使用，指明电表量程的最佳范围。 
- OptimalRangeEndValue 电流值最佳范围的终止值。 
Step4.实现表盘动态动作的代码。 
在MainWindow.xaml.cs中添加下面的代码，采用随机数动态模拟指针动作的过程。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
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.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Windows.Threading;
using System.ComponentModel;

namespace Galvanometer
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        //Private variables
        private DispatcherTimer timer;
        private Game game1;
        public MainWindow()
        {
            InitializeComponent();
            this.Loaded += new RoutedEventHandler(Window_Loaded);
        }
        void Window_Loaded(object sender, RoutedEventArgs e)
        {
            //Set the current value of the gauges
            game1 = new Game(0);
            this.myGauge1.DataContext = game1;

            //Start the timer
            timer = new DispatcherTimer();
            timer.Interval = TimeSpan.FromMilliseconds(2000);
            timer.Tick += new EventHandler(timer_Tick);
            timer.Start();
        }

        void timer_Tick(object sender, EventArgs e)
        {
            //Update random scores
            Random r = new Random();
            game1.Score = r.Next(0, 1000);
        }
    }
    /// <summary>
    /// Helper class to simulate a game
    /// </summary>
    public class Game : INotifyPropertyChanged
    {
        private double score;

        public double Score
        {
            get { return score; }
            set
            {
                score = value;
                if (PropertyChanged != null)
                {
                    PropertyChanged(this, new PropertyChangedEventArgs("Score"));
                }
            }
        }


        public Game(double scr)
        {
            this.Score = scr;
        }


        #region INotifyPropertyChanged Members

        public event PropertyChangedEventHandler PropertyChanged;

        #endregion
    }
}