我目前正在参加一个编码类(class),其中一部分涉及使用 Python 的 Tkinter 函数。我们的任务是创建一个脚本来显示“地球”旋转“太阳”。真的所有这些都是利用基本的几何形状和三角学(这是开始工作的痛苦),据我所知,我的代码应该可以工作,但无论出于何种原因,它继续忽略我的 if/elif 语句。我觉得我的困惑是由于缺乏经验和理解,但我希望有人能帮我弄清楚我做错了什么。感谢您的阅读。 ^-^

#import Tkinter package responsible for constructing a
# graphical user interface, GUI

import Tkinter

#from Tkinter, import Canvas Class, which allows us to draw on the GUI
from Tkinter import Canvas, NW, Scale, HORIZONTAL
from math import cos, sin, radians


#create a child object called root. This object is our window. Tk() is
#the class constructor to instantiate the window
root = Tkinter.Tk()

#call the method title passing in the title of our window
root.title("Earth Orbit")

#create a child object called canvas. This object is our canvas for
#drawing. We instantiate from the Canvas class, calling the constructor and
#passing in the parent of our canvas, and defining the dimenstions
canvas = Canvas(root,width=600,height=600,bg="white")

#call the grid method so that whatever we place on the canvas will be visible
canvas.grid()

color = canvas.create_polygon(0, 0, 0, 600, 600, 600, 600, 0, fill=
"light blue")
season = canvas.create_text(50,100,text="Winter", anchor=NW)
#intial coordinates for our circle
xpos = 275
ypos = 25

Earth = canvas.create_oval(xpos, ypos, xpos+25, ypos+25, fill="blue", outline="cyan")

x = cos(radians(0))
y = sin(radians(0))
Sun = canvas.create_oval(200, 200, 400, 400, fill="orange", outline="yellow")
def changeCirclePosition(event):
    x = 300 + (200*cos(radians(rectSlider.get())))
    y = 300 + (200*-sin(radians(rectSlider.get())))
    canvas.coords(Earth, x, y, x+25, y+25)
rectSlider = Scale(root,from_=0, to=360,orient=HORIZONTAL,label='Change Position',command=changeCirclePosition)
canvas.create_window(250,500, anchor=NW, window=rectSlider)

if 0<= rectSlider < 90:
        canvas.itemconfigure(color, fill="green")
        canvas.itemconfigure(season,text="Spring")
elif 90<=rectSlider < 180:
        canvas.itemconfigure(color, fill="yellow")
        canvas.itemconfigure(season,text="Summer")
elif 180 <= rectSlider < 270:
        canvas.itemconfigure(color, fill="orange")
        canvas.itemconfigure(season,text="Autumn")
elif 270 <= rectSlider < 360:
        canvas.itemconfigure(color, fill="light blue")
        canvas.itemconfigure(season,text="Winter")
canvas.focus_set()
root.mainloop()

最佳答案

您必须将这些比较放在回调中。此外,您不能将 Scale 本身与整数进行比较,您必须获取它的值,就像您对 xy 所做的那样:

def changeCirclePosition(event):
    x = 300 + (200*cos(radians(rectSlider.get())))
    y = 300 + (200*-sin(radians(rectSlider.get())))
    canvas.coords(Earth, x, y, x+25, y+25)
    if 0<= rectSlider.get() < 90:
            canvas.itemconfigure(color, fill="green")
            canvas.itemconfigure(season,text="Spring")
    elif ...

关于python - 我在这里做错了什么?~~Python 中的 Tkinter,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/34995793/

10-12 00:04
查看更多