我正在阅读一本书,并进行了一个练习,用户从单选按钮中选择一个图形,并通过选择一个复选按钮来指定它是否被填充。在最初看起来很简单的练习上挣扎了几天,我已经筋疲力尽了。如何使用名为“填充”的复选框来更改矩形和椭圆形的填充?任何帮助表示赞赏。
from tkinter import *
class SelectShapes:
def __init__(self):
window = Tk()
window.title("Select Shapes")
self.canvas = Canvas(window, width = 500, height = 400, bg = "white" )
self.canvas.pack()
frame1 = Frame(window)
frame1.pack()
self.v1 = IntVar()
btRectangle = Radiobutton(frame1, text = "Rectangle", variable = self.v1, value = 1, command = self.processRadiobutton)
btOval = Radiobutton(frame1, text = "Oval", variable = self.v1, value = 2, command = self.processRadiobutton)
btRectangle.grid(row = 2, column = 1)
btOval.grid(row = 2, column = 2)
self.v2 = IntVar()
cbtFill = Checkbutton(frame1, text = "Fill", variable = self.v2, command = self.processCheckbutton)
cbtFill.grid(row = 2, column = 3)
window.mainloop()
def processCheckbutton(self):
if self.v2.get() == 1:
self.v1["fill"] = "red"
else:
return False
def processRadiobutton(self):
if self.v1.get() == 1:
self.canvas.delete("rect", "oval")
self.canvas.create_rectangle(10, 10, 250, 200, tags = "rect")
self.canvas.update()
elif self.v1.get() == 2:
self.canvas.delete("rect", "oval")
self.canvas.create_oval(10, 10, 250, 200, tags = "oval")
self.canvas.update()
SelectShapes() # Create GUI