使用 tkinter 随时间自动移动形状

Question

当我运行当前程序时，该程序上的三角形仅在我按下按钮时移动一次。我希望我的三角形每单位时间自动移动一个像素，但我不知道如何做到这一点。

到目前为止，在执行此程序时，我仍然无法弄清楚类和定义的哪些位去哪里以及如何处理这些类和定义以使它们像我想要的那样工作，如上所述。

import tkinter as tk
from tkinter import PhotoImage
from tkinter import *
import time

counter = 0
running = False   

class triangle():
    def trianglemovedefine(move_x, move_y):
        canvas.move (triangle3, move_x, move_y)

    def trianglemove():
        triangle.trianglemovedefine(1, 0)

def moveitboi(justmoveit):
    def count(): 
        if running: 
            global counter 
            justmoveit = lambda:triangle.trianglemove()
            #My "per unit time" adjusted to per 1000 microseconds
            justmoveit.after(1000, count)  
            counter += 1
    count()

def Start(justmoveit):
    global running
    running=True
    moveitboi(justmoveit)

root = tk.Tk()
root.geometry("960x600")

label_toptitle = tk.Label(root, text="Program Name", font=(None, 40),)
label_toptitle.grid(row=0, columnspan=3)

label_desc = tk.Label(root, image=pixel, compound="center", width=900, font=(None, 14),
                                          padx=20, pady=10, text=description)

label_desc.grid(row=1, columnspan=3)

canvas = tk.Canvas(width=960, height=300, bg='white')
canvas.grid(row=2, column=0, columnspan=3)

for linecounter in range(49):
        newtextbit = linecounter + 1
        if (newtextbit + 3) % 4 == 0 and newtextbit != 49:
                canvas.create_text((linecounter * 16 + 80), 90,
                                           fill="darkblue",
                                           font="Times 10 bold",
                                           text=newtextbit)
        if (newtextbit + 3) % 4 == 0:
                canvas.create_line(((linecounter * 16 + 80)), 40, ((linecounter * 16 + 80)), 70,
                                           width=1,
                                           fill="black"
                                           )
        else:
                canvas.create_line(((linecounter * 16 + 80)), 50, ((linecounter * 16 + 80)), 70,
                                           width=1,
                                           fill="black"
                                           )
canvas.create_line(73, 70, 860, 70,
                                   width=2,
                                   fill="black"
                                   )
#The Triangle
triangle3 = canvas.create_polygon(75, 25, 86, 25, 80, 40, fill ='red')

f1 = tk.Frame(root, width=70, height=30)
f1.grid(row=3, column=0, sticky='W')

button_record = tk.Button(f1,
                          text="Record",
                          compound="top",
                          command=lambda:triangle.trianglemove(),
                          )

button_record.pack(side='left', padx=140)


root.mainloop()

Answer 1

在对您的问题中的代码进行了相当广泛的更改后，最终我能够获得足够可运行的东西来说明如何实施我在 cmets 中发布的关于如何使用通用 after() 小部件方法做您想做的事情的建议.

注意moveitboi() 的最后一行如何调用after() 在指定的延迟后安排另一个调用自身。

在进行更改时，我还尝试使代码主要遵循PEP 8 - Style Guide for Python Code 的建议。我强烈建议您阅读并在以后编写自己的代码时也这样做。

import tkinter as tk

class Triangle:
    def __init__(self, canvas, *points, fill=''):
        self.canvas = canvas
        self.obj_id = canvas.create_polygon(*points, fill=fill)

    def move(self, move_x, move_y):
        self.canvas.move(self.obj_id, move_x, move_y)

    def move_right(self):
        self.move(1, 0)


def moveitboi(parent, marker):
    global counter

    if running:
        marker.move_right()
        counter += 1

    # Call this func again after delay.
    parent.after(1000, moveitboi, parent, marker)

def start(parent, marker):
    global running

    if not running:
        running = True
        moveitboi(parent, marker)  # Start triangle position updates.


root = tk.Tk()
root.geometry("960x600")

counter = 0
running = False

label_toptitle = tk.Label(root, text="Program Name", font=(None, 40),)
label_toptitle.grid(row=0, columnspan=3)

# Left out because I don't have the "pixel" image.
#label_desc = tk.Label(root, image=pixel, compound=tk.CENTER, width=900, font=(None, 14),
#                      padx=20, pady=10, text=description)

canvas = tk.Canvas(root, width=960, height=300, bg='white')
canvas.grid(row=2, column=0, columnspan=3)

for linecounter in range(49):
    newtextbit = linecounter + 1
    xposn = linecounter*16 + 80

    if (newtextbit + 3) % 4 == 0 and newtextbit != 49:
        canvas.create_text(xposn, 90, fill="darkblue", font="Times 10 bold",
                           text=newtextbit)
    if (newtextbit + 3) % 4 == 0:
        canvas.create_line(xposn, 40, xposn, 70, width=1, fill="black")
    else:
        canvas.create_line(xposn, 50, xposn, 70, width=1, fill="black")  

canvas.create_line(73, 70, 860, 70, width=2, fill="black")

# Global triangle.
triangle3 = Triangle(canvas, 75, 25, 86, 25, 80, 40, fill='red')

f1 = tk.Frame(root, width=70, height=30)
f1.grid(row=3, column=0, sticky='W')

button_record = tk.Button(f1, text="Record", compound="top",
                          command=lambda: start(root, triangle3))
button_record.pack(side='left', padx=140)

root.mainloop()

这是一个屏幕截图，显示了在点击 Record 按钮几秒钟后红色标记的移动位置：