Show_EMG.py

import ble
from pyqtgraph import PlotWidget
import pyqtgraph as pg
import numpy as np
from PyQt5 import QtCore

class Plot_Show(object):
    '''
    绘图组件，输出5~550范围的数值
    定义绘图时的参数：QWidget、组件y作标、组件x作标、y轴数据、组件宽高、组件对象文本
    Form,y,x,data,length = 1800, width = 250, high = 120, text = "sEMG Voltage"
    '''
    def __init__(self,Form,y,x,data,text=""):
        # length = 1800, width = 250, high = 120, text = "sEMG Voltage"
        self.Form=Form
        self.y=y
        self.x=x
        self.data=ble.EMG[data]
        self.length=1800
        if(text==""):
            self.test="sEMG Voltage"
        else:
            self.text = text
        self.graphicsView = PlotWidget(self.Form)
        self.initUI()


    def initUI(self):

        self.graphicsView.setGeometry(QtCore.QRect(self.y, self.x, 250, 120))
        self.graphicsView.hideButtons()
        self.graphicsView.setObjectName(self.text)


        self.graphicsView.setLabel(axis="left",text=self.text)
        self.graphicsView.setLabel(axis='bottom',text='Time')
        self.graphicsView.setMouseEnabled(x=False,y=False)
        self.graphicsView.setAntialiasing(True)
        self.graphicsView.setMenuEnabled(False)
        self.graphicsView.hideButtons()
        self.data1 = np.zeros(self.length)
        self.curve1 = self.graphicsView.plot(self.data1)
        self.ptr1 = 0

        def update1():
            global data1, ptr1
            self.graphicsView.setRange(xRange=[self.ptr1,self.ptr1+self.length],yRange=[5,550],padding=0)
            self.data1[:-1] = self.data1[1:]  # shift data in the array one sample left

            self.data1[-1] = self.data

            self.ptr1 += 1
            self.curve1.setData(self.data1)
            self.curve1.setPos(self.ptr1, 0)

        self.timer = pg.QtCore.QTimer()
        self.timer.timeout.connect(update1)
        self.timer.start(10)