c# - 从鼠标悬停在类对象 C# 上获取值

Question

我有一个包含 360 个数字的 txt 文件，我必须阅读所有这些并绘制一种由 FillPie 制成的圆盘，由于列表的值，每个圆盘都以灰色比例着色。到这里为止，一切都非常简单。我用一个填充图的数据(txt 中的值和度数)创建了一个类，并使用 Paint 方法绘制了正确的颜色。这是类的代码:

class DatoDisco
{
    int valoreSpicchio;
    int gradi;

    public DatoDisco(int valoreTastatore, int gradiLettura)
    {
        valoreSpicchio = valoreTastatore;
        gradi = gradiLettura;
    }

    public void Clear()
    {
        valoreSpicchio = 0;
        gradi = 0;
    }

    private int ScalaGrigi()
    {
        int grigio = 0;
        if (valoreSpicchio <= 0)
        {
            grigio = 125 + (valoreSpicchio / 10);
            if (grigio < 0)
                grigio = 0;
        }
        if (valoreSpicchio > 0)
        {
            grigio = 125 + (valoreSpicchio / 10);
            if (grigio > 230)
                grigio = 230;
        }
        return grigio;
    }

    public void Paint (Graphics grafica)
    {
        try
        {
            Brush penna = new SolidBrush(Color.FromArgb(255, ScalaGrigi(), ScalaGrigi(), ScalaGrigi()));
            grafica.FillPie(penna, 0, 0, 400, 400, gradi, 1.0f);
        }
        catch
        {
        }
    }

    public int ValoreSpicchio
    {
        get
        {
            return valoreSpicchio;
        }
    }

    public int Gradi
    {
        get
        {
            return gradi;
        }
    } 
}

这里是我绘制所有内容的地方:

public partial class Samac : Form
{
    libnodave.daveOSserialType fds;
    libnodave.daveInterface di;
    libnodave.daveConnection dc;
    int rack = 0;
    int slot = 2;
    int scalaGrigi = 0;
    int angolatura = 0;
    List<int> valoriY = new List<int>();
    //Disco disco = new Disco();
    List<DatoDisco> disco = new List<DatoDisco>();

    float[] valoriTastatore = new float[360];
    public Samac()
    {
        InitializeComponent();
        StreamReader dataStream = new StreamReader("save.txt");

        textBox1.Text = dataStream.ReadLine();
        dataStream.Dispose();
        for (int i = 0; i <= 360; i++ )
            chart1.Series["Series2"].Points.Add(0);
        //AggiornaGrafico(textBox1.Text, chart1);
        SetStyle(ControlStyles.SupportsTransparentBackColor, true);
    }
    string indirizzoIpPlc
    {
        get
        {
            FileIniDataParser parser = new FileIniDataParser();
            IniData settings = parser.LoadFile("config.ini");
            return settings["PLC_CONNECTION"]["PLC_IP"];
        }
    }
    private void AggiornaGrafico(string nomeFile, Chart grafico, bool online)
    {
        int max = 0;
        int min = 0;
        grafico.Series["Series1"].Points.Clear();
        grafico.Series["Series2"].Points.Clear();
        grafico.Series["Series3"].Points.Clear();
        grafico.Series["Series4"].Points.Clear();
        grafico.ChartAreas[0].AxisX.Maximum = 360;
        grafico.ChartAreas[0].AxisX.Minimum = 0;
        grafico.ChartAreas[0].AxisY.Maximum = 500;
        grafico.ChartAreas[0].AxisY.Minimum = -500;
        String file = nomeFile;
        valoriY.Clear();
        disco.Clear();

        if (online == false)
        {
            System.IO.File.WriteAllText("save.txt", nomeFile);
        }

            StreamReader dataStreamGrafico = new StreamReader(file);
            StreamReader dataStreamScheda = new StreamReader("Scheda.sch");

            string datasample;
            string[] scheda = new string[56];
            for (int i = 0; i < 56; i++)
            {
                scheda[i] = dataStreamScheda.ReadLine();
            }
            dataStreamScheda.Close();
        int gradi = 1;
            while ((datasample = dataStreamGrafico.ReadLine()) != null)
                { 
                    grafico.Series["Series2"].Points.Add(0);
                    grafico.Series["Series2"].Color = Color.Red;
                    grafico.Series["Series2"].BorderWidth = 3;
                    grafico.Series["Series3"].Points.Add(Convert.ToInt32(float.Parse(scheda[5])));
                    grafico.Series["Series3"].Color = Color.Green;
                    grafico.Series["Series3"].BorderWidth = 3;
                    grafico.Series["Series4"].Points.Add(Convert.ToInt32(-float.Parse(scheda[5])));
                    grafico.Series["Series4"].Color = Color.Green;
                    grafico.Series["Series4"].BorderWidth = 3;
                    grafico.Series["Series1"].Points.Add(int.Parse(datasample));
                    grafico.Series["Series1"].BorderWidth = 5; 
                    valoriY.Add(int.Parse(datasample));
                    //disco.Add(int.Parse(datasample));
                    disco.Add(new DatoDisco(int.Parse(datasample), gradi));
                    gradi++;
                }
            dataStreamGrafico.Close();
            max = Convert.ToInt32(chart1.Series["Series1"].Points.FindMaxByValue().YValues[0]);
            min = Convert.ToInt32(chart1.Series["Series1"].Points.FindMinByValue().YValues[0]);
            lblCampanatura.Text = (((float)max + min) / 2000.0).ToString();
            lblSbandieramento.Text = (((float)max - min) / 1000.0).ToString();

        if ((Math.Abs(max) > 800) || (Math.Abs(min) > 800))
        {
            if (Math.Abs(max) >= Math.Abs(min))
            {
                chart1.ChartAreas[0].AxisY.Maximum = max + 200;
                chart1.ChartAreas[0].AxisY.Minimum = -(max + 200);
            }
            else
            {
                chart1.ChartAreas[0].AxisY.Maximum = min + 200;
                chart1.ChartAreas[0].AxisY.Minimum = -(min + 200);
            }
        }
        else
        {
            chart1.ChartAreas[0].AxisY.Maximum = 800;
            chart1.ChartAreas[0].AxisY.Minimum = -800;
        }
            boxGraficaDisco.Refresh();
    }

    private void button1_Click(object sender, EventArgs e)
    {
        DialogResult result = openFileDialog1.ShowDialog();
          textBox1.Text = openFileDialog1.FileName;
          if (result == DialogResult.OK)
          {
              AggiornaGrafico(textBox1.Text, chart1, timer1.Enabled);     
          }

    }

    ToolTip tooltip = new ToolTip();
    private int lastX;
    private int lastY;


    private void chart1_MouseMove(object sender, MouseEventArgs e)
    {
        if (e.X != this.lastX || e.Y != this.lastY)
        {
            try
        {
                int cursorX = Convert.ToInt32(chart1.ChartAreas[0].AxisX.PixelPositionToValue(e.Location.X));

                tooltip.Show("X:" + cursorX.ToString("0.00") + "Y:" + Convert.ToInt32(chart1.Series[0].Points[cursorX].YValues[0]).ToString(), this.chart1, e.Location.X + 20, e.Location.Y + 20);                    
        }

        catch { }
        }
        this.lastX = e.X;
        this.lastY = e.Y;
    }

    private void button1_Click_1(object sender, EventArgs e)
    {
        int indice = ((int)Char.GetNumericValue(textBox1.Text[textBox1.Text.Length - 5]))+1;
        if (File.Exists(textBox1.Text.Substring(0, textBox1.Text.Length - 5) + indice + ".txt"))
        {
            textBox1.Text = textBox1.Text.Substring(0, textBox1.Text.Length - 5) + indice + ".txt";
            try
            {
                AggiornaGrafico(textBox1.Text, chart1, timer1.Enabled);
            }
            catch
            {
                MessageBox.Show("Il File non esiste");
            }
        }
        else
        {
            MessageBox.Show("Il File non esiste");
        }
    }

    private void btnGrafMeno_Click(object sender, EventArgs e)
    {
        int indice = ((int)Char.GetNumericValue(textBox1.Text[textBox1.Text.Length - 5])) - 1;
        if (indice >= 0)
        {
            textBox1.Text = textBox1.Text.Substring(0, textBox1.Text.Length - 5) + indice + ".txt";
            try
            {
                AggiornaGrafico(textBox1.Text, chart1, timer1.Enabled);
            }
            catch
            {
                MessageBox.Show("Il File non esiste");
            }
        }
        else
        {
            MessageBox.Show("Prima lettura disco");
        }
    }

    private void btnConnetti_Click(object sender, EventArgs e)
    {
        fds.rfd = libnodave.openSocket(102, indirizzoIpPlc);
        fds.wfd = fds.rfd;
        if (fds.rfd > 0)
        {
            di = new libnodave.daveInterface(fds, "IF1", 0, libnodave.daveProtoISOTCP, libnodave.daveSpeed187k);
            di.setTimeout(1000000);
            dc = new libnodave.daveConnection(di, 0, rack, slot);
            int res = dc.connectPLC();
            timer1.Start();
           // AggiornaGrafico("Disco.csv", chart1, timer1.Enabled);
        }
        else
        {
            MessageBox.Show("Impossibile connettersi");
        }
    }

    private void timer1_Tick(object sender, EventArgs e)
    {
        if (timer1.Enabled == true)
        {
                int res;
                res = dc.readBytes(libnodave.daveDB, 21, 40, 1, null);
                if (res == 0)
                {
                    var letturaDati = (dc.getS8At(0) & (1 << 0)) != 0;
                    if (letturaDati == true)
                    {
                        int puntatore = 30;
                        StreamWriter datiDisco = new StreamWriter("DatiDaPlc.csv");
                        datiDisco.WriteLine("X;" + "C;" + "Z;");
                        while (puntatore <= 10838)
                        {
                            res = dc.readBytes(libnodave.daveDB, 3, puntatore, 192, null);
                            if (res == 0)
                            {
                                for (int i = 0; dc.getU32At(i) != 0; i = i + 12)
                                {
                                    datiDisco.Write(dc.getU32At(i).ToString() + ";");
                                    datiDisco.Write(dc.getU32At(i + 4).ToString() + ";");
                                    datiDisco.WriteLine(dc.getFloatAt(i + 8).ToString() + ";");
                                }
                            }
                            puntatore = puntatore + 192;
                        }
                        datiDisco.Close();
                        StreamReader lettura = new StreamReader("DatiDaPlc.csv");
                        StreamWriter scritt = new StreamWriter("Disco.csv");
                        var titolo = lettura.ReadLine();
                        var posizioneLettura = lettura.ReadLine();
                        var posX = posizioneLettura.Split(';');
                        int minX = Convert.ToInt32(posX[0]) - 5;
                        int maxX = Convert.ToInt32(posX[0]) + 5;
                        int contatore = 0;
                        while (!lettura.EndOfStream)
                        {
                            var line = lettura.ReadLine();
                            var values = line.Split(';');

                            if ((Convert.ToInt32(values[1]) >= contatore && Convert.ToInt32(values[1]) < contatore + 1000) && (Convert.ToInt32(values[0]) > minX && Convert.ToInt32(values[0]) <= maxX))
                            {
                                scritt.WriteLine(Convert.ToInt32(float.Parse(values[2]) * 1000).ToString());
                                contatore += 1000;
                            }
                        }
                        lettura.Close();
                        scritt.Close();
                        AggiornaGrafico("Disco.csv", chart1, timer1.Enabled);
                    } 
                }

                else
                {
                    timer1.Stop();
                    MessageBox.Show("Disconnesso");
                    dc.disconnectPLC();
                    di.disconnectAdapter();
                    fds.rfd = libnodave.closeSocket(102);
                    fds.wfd = fds.rfd;
                }
        }
    }

    private void btnDisconnetti_Click(object sender, EventArgs e)
    {
        if (timer1.Enabled == true)
        {
            dc.disconnectPLC();
            di.disconnectAdapter();
            fds.rfd = libnodave.closeSocket(102);
            fds.wfd = fds.rfd;
            timer1.Stop();
            AggiornaGrafico(textBox1.Text, chart1, timer1.Enabled);
        }
    }

    private void Samac_FormClosing(object sender, FormClosingEventArgs e)
    {
        if (timer1.Enabled == true)
        {
            dc.disconnectPLC();
            di.disconnectAdapter();
            libnodave.closeSocket(102);
            timer1.Stop();
        }
    }

    private void button1_Click_2(object sender, EventArgs e)
    {
        if (timer1.Enabled == true)
        {
            AggiornaGrafico("Disco.csv", chart1, timer1.Enabled);
        }
        else
        {
            AggiornaGrafico(textBox1.Text, chart1, timer1.Enabled);
        }
    }

    private void chart2_MouseMove(object sender, MouseEventArgs e)
    {
        if (e.X != this.lastX || e.Y != this.lastY)
        {
            try
            {
                int cursorX = Convert.ToInt32(chart2.ChartAreas[0].AxisX.PixelPositionToValue(e.Location.X));
                int cursorY = Convert.ToInt32(chart2.ChartAreas[0].AxisY.PixelPositionToValue(e.Location.Y));
                //tooltip.Show("X:" + chart2.Series[0].Points[cursorX].XValue.ToString() + "Y:" + chart2.Series[0].Points[cursorX].YValues[0].ToString(), this.chart2, e.Location.X + 20, e.Location.Y + 20);
                tooltip.Show("X:" + cursorX.ToString() + "Y:#VALY" , this.chart2, e.Location.X + 20, e.Location.Y + 20);
                //chart2.Series[0].ToolTip="#VALY";
            }

            catch { }
        }
        this.lastX = e.X;
        this.lastY = e.Y;
    }

    private void boxGraficaDisco_Paint(object sender, PaintEventArgs e)
    {
        Graphics grafica = e.Graphics;
        //disco.Paint(grafica);
        foreach (DatoDisco d in disco)
        {
            d.Paint(grafica);
        }
    }

    private void boxGraficaDisco_MouseMove(object sender, MouseEventArgs e)
    {
        if (e.X != this.lastX || e.Y != this.lastY)
        {
            try
            {
                foreach (DatoDisco d in disco)
                {

                }
            }

            catch { }
        }
        this.lastX = e.X;
        this.lastY = e.Y;
    }
}

现在我需要，当我将鼠标移到绘制的圆盘上时，工具提示会显示 fillPie 的数据(txt 的度数和值)，但我不知道如何操作。任何人都可以帮助我吗？这是光盘的图像

Answer 1

最终看起来好像你想要的只是一个函数来获取鼠标位置和圆盘中心之间的角度..

这是一个计算给定两点的角度的函数:

double AngleFromPoints(Point pt1, Point pt2)
{
    Point P = new Point(pt1.X - pt2.X, pt1.Y - pt2.Y);
    double alpha = 0d;
    if (P.Y == 0) alpha = P.X > 0 ? 0d : 180d;
    else
    {
        double f = 1d * P.X / (Math.Sqrt(P.X * P.X + P.Y * P.Y));
        alpha = Math.Acos(f) * 180d / Math.PI; 
        if (P.Y > 0) alpha = 360d - alpha;
    }
    return alpha;
}