How to make menubar cut/copy/paste with Python/Tkinter

问题

I'd like to make menu items (in the menubar, not in a right click pop-up window) that can cut/copy/paste whatever text is selected.

The equivalent keyboard commands already work without my having done anything to enable them. For example, I can enter text in an entry box, cut it with Control-X, and paste it back (or elsewhere) with Control-C.

The posts on the topic I've seen boil down to cut/copy/paste for individual widgets, but that already works. How do I make the menu items activate them?

Thanks.

EDIT: Just to be clear, The issues are:

how to make the menu items for cut/copy act on whatever text is selected in any widget
how to have the paste menu item paste text wherever the text cursor is

Again, the key commands to do this (Control-x, Control-c, Control-v) already work without my having done anything. I know how to make the menus; the question is just what command I should attach to the menu items to have the desired effect.

EDIT 2: Ok, I've got a way that works. Since the key commands already work, we can just generate them. In my case, everything is a a notebook named noteBook so

lambda: self.noteBook.event_generate('<Control-x>')

cuts as desired. For example:

editmenu.add_command(label="Cut", accelerator="Ctrl+X", command=lambda: self.noteBook.event_generate('<Control-x>'))

In use: https://github.com/lnmaurer/qubit-control-interface/commit/c08c10a7fbc4a637c1e08358fb9a8593dfdf116e

Still, there's probably a cleaner way to do this; please reply if you know it.

回答1:

try this: source

import Tkinter

def make_menu(w):
    global the_menu
    the_menu = Tkinter.Menu(w, tearoff=0)
    the_menu.add_command(label="Cut")
    the_menu.add_command(label="Copy")
    the_menu.add_command(label="Paste")

def show_menu(e):
    w = e.widget
    the_menu.entryconfigure("Cut",
    command=lambda: w.event_generate("<<Cut>>"))
    the_menu.entryconfigure("Copy",
    command=lambda: w.event_generate("<<Copy>>"))
    the_menu.entryconfigure("Paste",
    command=lambda: w.event_generate("<<Paste>>"))
    the_menu.tk.call("tk_popup", the_menu, e.x_root, e.y_root)

t = Tkinter.Tk()
make_menu(t)

e1 = Tkinter.Entry(); e1.pack()
e2 = Tkinter.Entry(); e2.pack()
e1.bind_class("Entry", "<Button-3><ButtonRelease-3>", show_menu)

t.mainloop()

回答2:

Use the focus_get() method to get the widget which currently has keyboard focus, and then send the event to that widget. E.g.

editmenu = Menu(menubar, tearoff=0)
editmenu.add_command(label="Cut", \
                     accelerator="Ctrl+X", \
                     command=lambda: \
                             mywindow.focus_get().event_generate('<<Cut>>'))

回答3:

Have Fun

from Tkinter import *

class Test(Text):
    def __init__(self, master, **kw):
        Text.__init__(self, master, **kw)
        self.bind('<Control-c>', self.copy)
        self.bind('<Control-x>', self.cut)
        self.bind('<Control-v>', self.paste)

    def copy(self, event=None):
        self.clipboard_clear()
        text = self.get("sel.first", "sel.last")
        self.clipboard_append(text)

    def cut(self, event):
        self.copy()
        self.delete("sel.first", "sel.last")

    def paste(self, event):
        text = self.selection_get(selection='CLIPBOARD')
        self.insert('insert', text)

def test():
    r = Tk()
    t = Test(r)
    t.pack(fill='both', expand=1)
    r.mainloop()

if __name__ == '__main__':
    test()

回答4:

I just came across your question nine months too late (does that make this a pregnant pause?). This code works for me:

    editmenu = Menu(menubar, tearoff=0)
    editmenu.add_command(label="Cut", \
                         accelerator="Ctrl+X", \
                         command=lambda: \
                                 self.editor.event_generate('<<Cut>>'))
    editmenu.add_command(label="Copy", \
                         accelerator="Ctrl+C", \
                         command=lambda: \
                                 self.editor.event_generate('<<Copy>>'))
    editmenu.add_command(label="Paste", \
                         accelerator="Ctrl+V", \
                         command=lambda: \
                                 self.editor.event_generate('<<Paste>>'))
    menubar.add_cascade(label="Edit", menu=editmenu)

来源：https://stackoverflow.com/questions/8449053/how-to-make-menubar-cut-copy-paste-with-python-tkinter

标签

python

tkinter