Canvas 未绑定到 class 内的鼠标按钮，tkinter-Python3

Question

我一直在尝试将 canvas 绑定到鼠标点击，如 but within a class. The callback function is not getting invoked though. All 中所述，此处似乎是在尝试绑定时调用 callback() 函数，而不是引用它。我正在引用它，但它仍然不起作用。

from tkinter import *

class BindingTrial():
    def __init__(self,root,canvas):
        self.root = root
        self.canvas = canvas
        self.canvas.bind("Button-1",self.callback)

    def callback(self,event):
        print ("clicked at", event.x, event.y)

root = Tk()
canvas= Canvas(root, width=100, height=100)
bt = BindingTrial(root,canvas)
canvas.pack()
root.mainloop()

Answer 1

您需要使用 "<Button-1>" 调用按钮绑定，并且回调应该接受 self 作为第一个参数。

class BindingTrial():
    def __init__(self,root,canvas):
        self.root = root
        self.canvas = canvas
        self.canvas.bind('<Button-1>',self.callback)

    def callback(self, event):
        print ("clicked at", event.x, event.y)

Canvas 未绑定到 class 内的鼠标按钮，tkinter-Python3

Canvas not binding to mouse button within a class, tkinter-Python3

python

canvas

tkinter

tkinter-canvas