Question

我几天前刚刚开始使用Python，我已经开始使用动画了。我正在开发一个名为“Bounce！”的屏幕，它在屏幕上有其他设置。设置为FPS和速度（增量）。但是，随着椭圆弹跳，这些设置会发生变化，我希望文本随之改变，但我不知道如何改变。这是我目前的代码：

import time
from tkinter import *
tk = Tk()
fps=30
increment=2
canvas = Canvas(tk,height='500',width='500')
canvas.pack()
canvas.create_oval(175,100,325,250,fill='red',outline='black')
canvas.create_line(50,100,450,100)
canvas.create_line(50,450,450,450)
canvas.create_text(250,30,text='Bounce!',fill='red',font=('Consolas',30))
x = canvas.create_text(250,75,text=('FPS: %s; Speed: %s'% (fps,increment)),fill='black',font=('Consolas',20)) #mainproblem

while True:
    increment += 1
    if increment % 2 == 0 and fps > 1:
        fps = fps - 1
    #I want the 'x' text to change to the current FPS and Speed here, but I do not know how.
    for x in range(0, int(200/increment)):
        canvas.move(1,0,increment)
        tk.update()
        time.sleep(1/fps)
    for x in range(0, int(200/increment)):
        canvas.move(1,0,-(increment))
        tk.update()
        time.sleep(1/fps)

我使用的是Python 3.4.2。

Answer 1

您可以使用itemconfigure更改画布上元素的设置（请参阅here）。另请注意，循环变量x正在为您指定文本ID的变量生成阴影。

text = canvas.create_text(...)
    ...
    canvas.itemconfigure(text, text=('FPS: %s; Speed: %s'% (fps,increment)))

Answer 2

import time
from tkinter import *
tk = Tk()
fps=30
increment=2
t = ('FPS: %s; Speed: %s'% (fps,increment))
canvas = Canvas(tk,height='500',width='500')
canvas.pack()
canvas.create_oval(175,100,325,250,fill='red',outline='black')
canvas.create_line(50,100,450,100)
canvas.create_line(50,450,450,450)
canvas.create_text(250,30,text='Bounce!',fill='red',font=('Consolas',30))
w = canvas.create_text(250,75,text= t,fill='black',font=('Consolas',20)) #mainproblem

while True:
    increment += 1
    if increment % 2 == 0 and fps > 1:
        fps = fps - 1
    t = ('FPS: %s; Speed: %s'% (fps,increment))

    canvas.itemconfig(w, text= t)

    for x in range(0, int(200/increment)):
        canvas.move(1,0,increment)
        tk.update()
        time.sleep(1/fps)
    for x in range(0, int(200/increment)):
        canvas.move(1,0,-(increment))
        tk.update()
        time.sleep(1/fps)

Python tkinter模块文本转换

2 个答案: