一起滚动多个 Tkinter 列表框 [英] Scrolling multiple Tkinter listboxes together

问题描述

我有多个 Tkinter 列表框，我使用单个滚动条将它们一起滚动，但我也希望它们一起滚动以在任何列表框上进行鼠标滚轮活动.

I have multiple Tkinter listboxes that I have scrolling together using a single scrollbar, but I'd ALSO like them to scroll together for mousewheel activity over any of the listboxes.

如何做到这一点?

我当前的代码基于这里讨论的最后一个模式:http://effbot.org/tkinterbook/listbox.htm 仅使用滚动条时效果很好，但使用鼠标滚轮时列表框独立滚动.

My current code is based on the last pattern discussed here: http://effbot.org/tkinterbook/listbox.htm It works fine when using only the scrollbar, but the listboxes scroll independently when the mousewheel is used.

推荐答案

解决问题的方法与将两个小部件连接到单个滚动条的方法几乎相同:为鼠标滚轮创建自定义绑定并使这些绑定同时影响两者列表框，而不仅仅是一个.

Solve the problem pretty much the same way as you did to connect the two widgets to a single scrollbar: create custom bindings for the mousewheel and have those bindings affect both listboxes rather than just one.

唯一真正的技巧是知道你会根据平台获得不同的鼠标滚轮事件:windows 和 Mac 获得 事件，Linux 获得 ; 和 事件.

The only real trick is knowing that you get different events for the mousewheel depending on the platform: windows and the Mac gets <MouseWheel> events, linux gets <Button-4> and <Button-5> events.

这是一个例子，在我的 Mac 上用 python 2.5 测试过:

Here's an example, tested on my Mac with python 2.5:

import Tkinter as tk

class App:
    def __init__(self):
        self.root=tk.Tk()
        self.vsb = tk.Scrollbar(orient="vertical", command=self.OnVsb)
        self.lb1 = tk.Listbox(self.root, yscrollcommand=self.vsb.set)
        self.lb2 = tk.Listbox(self.root, yscrollcommand=self.vsb.set)
        self.vsb.pack(side="right",fill="y")
        self.lb1.pack(side="left",fill="x", expand=True)
        self.lb2.pack(side="left",fill="x", expand=True)
        self.lb1.bind("<MouseWheel>", self.OnMouseWheel)
        self.lb2.bind("<MouseWheel>", self.OnMouseWheel)
        for i in range(100):
            self.lb1.insert("end","item %s" % i)
            self.lb2.insert("end","item %s" % i)
        self.root.mainloop()

    def OnVsb(self, *args):
        self.lb1.yview(*args)
        self.lb2.yview(*args)

    def OnMouseWheel(self, event):
        self.lb1.yview("scroll", event.delta,"units")
        self.lb2.yview("scroll",event.delta,"units")
        # this prevents default bindings from firing, which
        # would end up scrolling the widget twice
        return "break"

app=App()

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