Tkinter按钮在鼠标左右键上单击不同的命令 [英] Tkinter button different commands on right and left mouse click

问题描述

我正在用Python开发扫雷游戏，并使用tkinter库创建gui.有没有绑定到tkinter Button的方法有两个，一个是右键单击时的命令，另一个是鼠标左键时的命令?

I am making minesweeper game in Python and use tkinter library to create gui. Is there any way to bind to tkinter Button two commands, one when button is right-clicked and another when it's left clicked?

推荐答案

尽管tkinter允许您为具有任何小部件的几乎任何事件添加绑定，但是按钮通常仅用于单击.如果您要开发扫雷游戏，则可能不希望使用 Button 小部件，因为按钮可能具有您不需要的内置行为.

Typically buttons are designed for single clicks only, though tkinter lets you add a binding for just about any event with any widget. If you're building a minesweeper game you probably don't want to use the Button widget since buttons have built-in behaviors you probably don't want.

相反，您可以相当容易地使用 Label ， Frame 或 Canvas 项目.主要困难在于，右键单击可能表示不同平台上的不同事件.对于某些而言，它是< Button-2> ，对于某些而言，它是< Button-3> .

Instead, you can use a Label, Frame, or a Canvas item fairly easily. The main difficulty is that a right click can mean different events on different platforms. For some it is <Button-2> and for some it's <Button-3>.

这是一个使用框架而不是按钮的简单示例.左键单击框架将使其变为绿色，右键单击将其变为红色.此示例也可以使用按钮来工作，尽管它的行为有所不同，因为按钮具有针对左键单击的内置行为，而框架和其他一些小部件则没有.

Here's a simple example that uses a frame rather than a button. A left-click over the frame will turn it green, a right-click will turn it red. This example may work using a button too, though it will behave differently since buttons have built-in behaviors for the left click which frames and some other widgets don't have.

import tkinter as tk

def left_click(event):
    event.widget.configure(bg="green")

def right_click(event):
    event.widget.configure(bg="red")

root = tk.Tk()
button = tk.Frame(root, width=20, height=20, background="gray")
button.pack(padx=20, pady=20)

button.bind("<Button-1>", left_click)
button.bind("<Button-2>", right_click)
button.bind("<Button-3>", right_click)

root.mainloop()

或者，您可以绑定到< Button> ，< ButtonPress> 或< ButtonRelease> ，这将不会触发无论单击哪个鼠标按钮.然后，您可以检查传入的事件对象的 num 参数，以确定单击了哪个按钮.

Alternately, you can bind to <Button>, <ButtonPress>, or <ButtonRelease>, which will trigger no matter which mouse button was clicked on. You can then examine the num parameter of the passed-in event object to determine which button was clicked.

def any_click(event):
    print(f"you clicked button {event.num}")
...
button.bind("<Button>", any_click)

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