c1.java

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package java2d;

import java.awt.*;
import java.awt.geom.Line2D;
import java.awt.geom.Rectangle2D;
import java.sql.Connection;

public class C1 extends AnimatingSurface {

    //public long sleepAmount = 500;
    private Connection con;
    private String samptime, disptime;
    private int aw, ah;
    private int columnInc;
    private int pts[];
    private int ptNum;
    private float rtd;
    private double doubleResult;
    private Rectangle graphOutlineRect = new Rectangle();
    private Rectangle2D BartRect = new Rectangle2D.Float();
    private Rectangle2D muRect = new Rectangle2D.Float();
    private Line2D graphLine = new Line2D.Float();
    private Color graphColor = new Color(46, 139, 87);
    private Color mfColor = new Color(0, 100, 0);
    private float rectW = (float) 40;
    //量程
    private int MI = 10;

    public C1() {
        setBackground(Color.white);
        name = "电流1";
        if (Java2Demo.connection != null) {
            con = Java2Demo.connection;

        }

    }


    public void reset(int w, int h) {

    }


    public void step(int w, int h) {

    }

    private void getdata() {
        if (Java2Demo.datapool != null) {
            rtd = Java2Demo.datapool.getdataF("I1", "current_table");
            realdata = rtd;
            samptime = Java2Demo.datapool.getdataT("current_table");
            disptime = samptime.substring(11, 19);
            System.out.println(disptime);

        }

    }


    public void render(int w, int h, Graphics2D g2) {

        g2.setBackground(Color.black);

        g2.clearRect(0, 0, w, h);
        g2.setColor(graphColor);
        //draw grahpicoutlinerect
        int graphX = 20;
        int graphY = 30;
        //int graphW=w-graphX-5;
        int graphW = w - graphX - 20;
        int graphH = h - graphY - 5;
        //
        System.out.println("the width is:" + graphW);
        int LT = graphW / 2;
        g2.setColor(Color.gray);
        g2.fill3DRect(graphX, graphY, graphW, graphH, true);

        //plot
        g2.setColor(Color.yellow);
        g2.drawString("电流1 实时数据     单位:毫安", graphX + graphW / 4, graphY / 2);

        int xcenter = graphX + graphW / 2, ycenter = graphY + graphH / 2 + 30;

        g2.setColor(Color.darkGray);
        g2.fill3DRect(xcenter - 80, ycenter - 100, 160, 170, true);
        g2.setColor(Color.red);
        g2.fillOval(xcenter, ycenter - 20, 3, 3);

        //plot Arc
        g2.setColor(Color.red);
        g2.drawArc(xcenter - 80, ycenter - 100, 160, 160, 15, 150);
        //g2.setColor(Color.darkGray);
        //g2.fillArc(xcenter-40,ycenter-60,80,80,15,150);




        //绘刻度
        g2.setColor(Color.yellow);
        g2.drawString("0", xcenter - 80, ycenter - 27);
        g2.drawLine(xcenter - 80, ycenter - 40,
                    xcenter - 80 + (int) (Math.cos(Math.PI / 12) * 10),
                    ycenter - 40 + (int) (Math.sin(Math.PI / 12) * 10));
        g2.drawString("" + MI / 2, xcenter + 3, ycenter - 100 + 10);
        g2.drawLine(xcenter, ycenter - 100, xcenter, ycenter - 100 + 9);
        g2.drawString("" + MI, xcenter + 65, ycenter - 27);
        g2.drawLine(xcenter + 80, ycenter - 40,
                    xcenter + 80 - (int) (Math.cos(Math.PI / 12) * 10),
                    ycenter - 40 + (int) (Math.sin(Math.PI / 12) * 10));

        //get data
        getdata();
        //动态绘针
        int Xpoint = xcenter, Ypoint = ycenter - 20; //指针起点
        double angle = rtd * Math.PI / 12; //实际值换算后的角度

        g2.drawLine(Xpoint, Ypoint,
                    Xpoint - (int) (Math.cos(Math.PI / 12 + angle) * 60),
                    Ypoint - (int) (Math.sin(Math.PI / 12 + angle) * 60));

        //绘制分刻度


        //plot data
        int T[] = new int[4];
        T = parseF(rtd);

        drawDigit(g2, T[0], graphX + graphW / 2 - 40, graphY + graphH - 40, 15,
                  20);
        drawDigit(g2, T[1], graphX + graphW / 2 - 20, graphY + graphH - 40, 15,
                  20);

        g2.setColor(new Color(160, 82, 45));
        g2.fillRect(graphX + graphW / 2, graphY + graphH - 24, 5, 5);

        drawDigit(g2, T[2], graphX + graphW / 2 + 10, graphY + graphH - 40, 15,
                  20);
        drawDigit(g2, T[3], graphX + graphW / 2 + 30, graphY + graphH - 40, 15,
                  20);

        //set samptime
        g2.setColor(Color.yellow);
        g2.drawString(disptime, graphX + graphW / 2 - 27, graphY + 12);

    }


}