python 确定在 Tkinter 中按下了哪个按钮？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/1539787/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Determine which Button was pressed in Tkinter?
提问by Sydius
I'm making a simple little utility while learning Python. It dynamically generates a list of buttons:
我在学习 Python 时正在制作一个简单的小实用程序。它动态生成按钮列表：
for method in methods:
button = Button(self.methodFrame, text=method, command=self.populateMethod)
button.pack({'fill': 'x', 'expand': 1, 'padx': 5, 'pady': 3})
That part works fine. However, I need to know which of the buttons was pressed inside self.populateMethod. Any advice on how I might be able to tell?
那部分工作正常。但是，我需要知道里面按下了哪个按钮self.populateMethod。关于我如何分辨的任何建议？
回答by Bryan Oakley
You can use lambda to pass arguments to a command:
您可以使用 lambda 将参数传递给命令：
def populateMethod(self, method):
print "method:", method
for method in ["one","two","three"]:
button = Button(self.methodFrame, text=method,
command=lambda m=method: self.populateMethod(m))
button.pack({'fill': 'x', 'expand': 1, 'padx': 5, 'pady': 3})
回答by Rapha?l Saint-Pierre
It seems that the command method is not passed any event object.
似乎命令方法没有传递任何事件对象。
I can think of two workarounds:
我可以想到两种解决方法：
associate a unique callback to each button
call
button.bind('<Button-1>', self.populateMethod)instead of passing self.populateMethod ascommand. self.populateMethod must then accept a second argument which will be an event object.Assuming that this second argument is called
event,event.widgetis a reference to the button that was clicked.
为每个按钮关联一个唯一的回调
调用
button.bind('<Button-1>', self.populateMethod)而不是将 self.populateMethod 作为command. self.populateMethod 然后必须接受将是事件对象的第二个参数。假设第二个参数被称为
event，event.widget是对被点击按钮的引用。
