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| import tkinter as tk
class Widget(tk.Frame):
def __init__(self, parent=None, names=None):
super().__init__(parent)
self._create_widget()
if names:
self._populate(names)
def _create_widget(self):
self._left = left = tk.Listbox(self, selectmode='extended')
left.grid(row=0, column=0)
self._right = right = tk.Listbox(self, selectmode='extended')
right.grid(row=0, column=2)
middle = tk.Frame(self)
middle.grid(row=0, column=1)
def move_all(src, dst):
def _cb_():
for s in src.get(0,'end'):
dst.insert('end', s)
src.delete(0,'end')
return _cb_
def move_selected(src, dst):
def _cb_():
for shift, x in enumerate(
[ int(_) for _ in src.curselection() ]):
ix = x - shift
s = src.get(ix)
dst.insert('end', s)
src.delete(ix)
return _cb_
defs = [
{ 'text': '>>', 'command' : move_all(left, right) },
{ 'text': '>', 'command' : move_selected(left, right), },
{ 'text': '<<', 'command' : move_all(right, left), },
{ 'text': '<', 'command' : move_selected(right, left), },
]
for kwds in defs: tk.Button(middle, kwds).pack()
def _populate(self, names):
left = self._left
for s in names:
left.insert('end', s)
if __name__ == '__main__':
root = tk.Tk()
widget = Widget(root, ('aa', 'bb', 'cc'))
widget.pack()
tk.mainloop() |
