Question

我正在尝试使用OBDII和tkinter作为GUI创建一个工具集群。问题是，GUI没有响应，绘制时间非常糟糕，因为我只有1个线程。我是python和OOP概念的新手，这也是我不知道如何继续这里的原因。这就是我想要做的，我想要两个线程用于绘图，而其他线程也处理数据。我也可以使用多个线程来绘制对象吗？任何帮助表示赞赏

import tkinter as tk
from PIL import ImageTk
from PIL import Image
import datetime
import obd


class SimpleApp(object):
    def __init__(self, master, **kwargs):
        self.master = master
        self.canvas = tk.Canvas(width=1400, height=800)
        self.canvas.pack()
        self.update = self.draw().__next__
        master.after(1, self.update)

    def draw(self):
        image_bk = Image.open("img/1.png")
        image = Image.open("img/2.png")
        image1 = Image.open("img/3.png")
        image_prnd = Image.open("img/4.png")
        angle = 2  # 0 -> 270
        angle1 = 0  # 0 -> 89
        Speed = 0
        RPM = 0
        Fuel = 0
        Temp = 0
        Time = ' '
        tkimage_bk = ImageTk.PhotoImage(image_bk)
        self.canvas.create_image(700, 400, image=tkimage_bk)
        self.canvas.create_text(100, 770, fill="white", font="BatmanForeverOutline 20 bold", text=" 70 F")
        tkimage_prnd = ImageTk.PhotoImage(image_prnd)

        while True:

            tkimage = ImageTk.PhotoImage(image.rotate(angle))
            tkimage1 = ImageTk.PhotoImage(image1.rotate(angle1))

            canvas_obj = self.canvas.create_image(690, 400, image=tkimage)
            canvas_obj1 = self.canvas.create_image(700, 400, image=tkimage1)
            self.canvas.create_image(700, 400, image=tkimage_prnd)
            self.canvas.create_text(700, 350, fill="white", font="BatmanForeverAlternate 20 bold ", text="MPH")
            self.canvas.create_text(700, 525, fill="white", font="BatmanForeverAlternate 20 bold ", text="RPM")
            self.canvas.create_text(700, 655, fill="white", font="BatmanForeverOutline 22 bold  ",  text="P  R  N      S")
            self.canvas.create_text(760, 655, fill='white', font="BatmanForeverAlternate 45  ", text="D")
            speed = self.canvas.create_text(700, 290, fill="white", font="Beyond 80  ", text=str(Speed))
            rpm = self.canvas.create_text(700, 465, fill="white", font="Beyond 65  ", text=str(RPM))
            temp = self.canvas.create_text(1250, 240, fill="white", font="BatmanForeverOutline 22   ",text=str(Temp) + " F")
            fuel = self.canvas.create_text(1250, 470, fill='white', font="BatmanForeverOutline 22  ", text=str(Fuel) + " %")
            time1 = self.canvas.create_text(1000, 770, fill="white", font="BatmanForeverOutline 20 bold", text=datetime.datetime.now().strftime("%a, %d %B"))
            time2 = self.canvas.create_text(1250, 770, fill="white", font="BatmanForeverOutline 20 bold", text=datetime.datetime.now().strftime("%I : %M : %S"))
            run_time = self.canvas.create_text(500, 770, fill="white", font="BatmanForeverOutline 20 bold",text=str(Time))
            self.master.after_idle(self.update)

            yield
            self.canvas.delete(time1)
            self.canvas.delete(canvas_obj)
            self.canvas.delete(canvas_obj1)
            self.canvas.delete(time1)
            self.canvas.delete(time2)
            self.canvas.delete(run_time)
            self.canvas.delete(temp)
            self.canvas.delete(fuel)
            self.canvas.delete(speed)
            self.canvas.delete(rpm)


            RPM = str(connection.query(cmd).value)
            RPM = RPM.split()
            RPM = int(RPM[ 0 ])

            Speed = str(connection.query(cmd1).value)
            Speed = Speed.split()
            Speed = int(Speed[ 0 ] / 1.60934)

            Temp = str(connection.query(cmd2).value)
            Temp = float(Temp.split()[ 0 ])

            Time = str(connection.query(cmd3).value)
            Time = int(Time.split()[ 0 ])

            Fuel = str(connection.query(cmd4).value)
            Fuel = int(float(Fuel.split()[ 0 ]))


            if (Speed > -1 and Speed < 21):
                angle = (Speed * 0.75)
                angle = 360 - angle
            else:
                angle = ((20 * 0.75) + ((Speed - 20) * 1.5))
                angle = 360 - angle

            if (RPM > -1 and RPM < 1000):
                angle1 = 0.016 * RPM

            else:
                angle1 = 16 + (RPM - 1000) * 0.0296


connection = obd.OBD()

cmd = obd.commands.RPM
cmd1 = obd.commands.SPEED
cmd2 = obd.commands.COOLANT_TEMP
cmd3 = obd.commands.RUN_TIME
cmd4 = obd.commands.FUEL_LEVEL

root = tk.Tk()
app = SimpleApp(root)

root.mainloop()

Answer 1

据我记忆，tkinter错误地处理gui的更改而不是来自主线程。但是你可以在其他线程中执行计算并转移到主线程。

注意方法之后的tkinter。使用它，您可以在某些时间间隔检查流中的数据。

多线程Tkinter Python

1 个答案: