Question

我正试图在按钮的点击上启动图表（它是从串口获取数据）。我曾尝试过以下代码，但没有成功。我是python的新手。如果我错了，请帮我指导。

我正在使用带有Tkinter的Python 2.7

提前致谢

import serial
import Tkinter as tk
import ttk

import matplotlib
matplotlib.use('TkAgg')
from matplotlib.backends.backend_tkagg import figureCanvasTkAgg
import matplotlib.animation as animation
import matplotlib.pyplot as plt
from matplotlib.figure import Figure

import tkFileDialog


x = []
adc_data = []


f = plt.Figure(figsize = (9,5), dpi = 100)
ax = f.add_subplot(111)

def select(self):
    self.BaudRate = self.Baud.get()
    self.COMPort = self.COM.get()

    self.ser = serial.Serial(port = self.COMPort, baudrate = self.BaudRate,bytesize = serial.EIGHTBITS, stopbits = serial.STOPBITS_ONE, parity = serial.PARITY_NONE)
    self.ser.close()
    self.ser.open()
    self.ser.flushInput();
    self.ser.flushOutput();

def quit_(self):
    self.ser.close()


def animate_(i):
     self.ser.write(str(chr(250)))

     data = self.ser.read(1)
     data1 = self.ser.read(1)

     LSB = ord(data)
     MSB = ord(data1)

     x.append(LSB)
     adc_data.append(MSB) #adding data to list
     plt.pause(.00001)


     ax.clear()
     ax.plot(x,adc_data)


def animate_button(self):
    ani = animation.FuncAnimation(f, animate_,interval=1000)



class ADC_Ref_Data(tk.Tk):

    def __init__(self, *args, **kwargs):

        tk.Tk.__init__(self, *args, **kwargs)

        tk.Tk.wm_geometry(self, '900x600+200+150')
        tk.Tk.wm_title(self, "ADC Reference")


        container = tk.Frame(self)
        container.pack(side="top", fill="both", expand = True)
        container.grid_rowconfigure(0, weight=1)
        container.grid_columnconfigure(0, weight=1)

        self.frames = {}

        frame = StartPage(container, self)

        self.frames[StartPage] = frame

        frame.grid(row=0, column=0, sticky = "nsew")

        self.show_frame(StartPage)

    def show_frame(self, cont):

        frame = self.frames[cont]
        frame.tkraise()


class StartPage(tk.Frame):

    def __init__(self, parent, controller):
        tk.Frame.__init__(self,parent)


        self.button = ttk.Button(self, text="Stop", state = 'disable',
                        command=lambda: quit_(self))
        self.button.place(relx = 0.97, rely = 0.95, height = 30 , width = 80, anchor = 'se')

        button2 = ttk.Button(self, text="Select",
                        command = lambda:select(self))
        button2.place(relx = 0.97, rely = 0.016, height = 30 , width = 80, anchor = 'ne')


        button4 = ttk.Button(self, text="Start",
                        command=lambda: animate_button(self))
        button4.place(relx = 0.03, rely = 0.95,  height = 30 , width = 80 , anchor = 'sw')




        canvas = FigureCanvasTkAgg(f, self)
        canvas.show()
        canvas.get_tk_widget().place(relx = 0.5, rely = 0.48, relwidth = 1, relheight = 0.8, anchor = 'center' )



app = ADC_Ref_Data()
app.mainloop()

Answer 1

我成功地让我的情节开始按下按钮。为了使我的代码正常工作，我只需在其中添加一个简单的行，如下所示：

def animate_button(self):
    ani = animation.FuncAnimation(f, animate_,frames = 10, interval=1000)
    f.canvas.show()

Answer 2

我知道这是一个老问题，但是对于未来的旅行者：有一些没有记录的功能可以用来控制动画。 See this answer for an example of start, stop and pause。

将FuncAnimation（）与Python 2.7中的Button链接

2 个答案: