如何使用Python / Tkinter进行菜单栏切割/复制/粘贴

Question

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 aa 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.

Answer 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()

Answer 2

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

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

Answer 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()

Answer 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)