tkinter listbox与python拖放 [英] tkinter listbox drag and drop with python

问题描述

谁能指出我在哪里可以找到有关制作列表框的信息，该列表框具有拖放项以进行重新排列的能力?我发现了一些与Perl相关的内容，但是我对这种语言一无所知，而且我对tkinter还是很陌生，所以这很令人困惑.我知道如何生成列表框，但不确定如何通过拖放对其进行重新排序.

Can anyone point me to where I can find info on making a listbox with the ability to drag and drop items for re-arranging? I've found some related to Perl, but I know nothing of that language and I'm pretty new to tkinter, so it was pretty confusing. I know how to generate listboxes, but I'm not sure how to re-order it through drag and drop.

推荐答案

以下是第11.4条:

import Tkinter 

class DragDropListbox(Tkinter.Listbox):
    """ A Tkinter listbox with drag'n'drop reordering of entries. """
    def __init__(self, master, **kw):
        kw['selectmode'] = Tkinter.SINGLE
        Tkinter.Listbox.__init__(self, master, kw)
        self.bind('<Button-1>', self.setCurrent)
        self.bind('<B1-Motion>', self.shiftSelection)
        self.curIndex = None

    def setCurrent(self, event):
        self.curIndex = self.nearest(event.y)

    def shiftSelection(self, event):
        i = self.nearest(event.y)
        if i < self.curIndex:
            x = self.get(i)
            self.delete(i)
            self.insert(i+1, x)
            self.curIndex = i
        elif i > self.curIndex:
            x = self.get(i)
            self.delete(i)
            self.insert(i-1, x)
            self.curIndex = i

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