Signifying unsaved changes by prepending * in window title - how to add a black dot in the window close button on Mac OS X?

问题

I am writing a text editor in Tkinter, using a TopLevel window that includes a Text widget. Currently, when a document/buffer contains unsaved changes, I prepend the title of the window with an asterisk as in MyDocument -> *MyDocument , as customary under *nix environments. For that purpose, I am using the edit_modified method of Text as follows:

import Tkinter as tk
class EditingWindow(tk.Toplevel):
    # [...]

    self.text = tk.Text(...)

    # track modifications of the text:
    self.text.bind("<<Modified>>", self.modified)

    def modified(self, event=None):
        if self.text.edit_modified():
            title=self.title()
            if title[0] != '*':
                self.title("*" + title)
        else:
            title=self.title()
            if title[0] == '*':
                self.title(title[1:])

    def save(self, event=None):
        # [... saving under a filename kept in the variable self.filename ...]
        self.text.edit_modified(False)
        self.title(os.path.basename(self.filename))

My question is: On Mac OS X, rather than prepending the window title with an asterisk, a black dot appears in the window close button (the red circular button on the topleft corner) to signify unsaved changes. Is it possible to access this feature from Tkinter (or, more generally, from Tcl/Tk)?

Edit 2: After initial suggestions to use applescript, Kevin Walzer came up with the solution: setting tkinter's wm_attributes. Above, that amounts to using

self.wm_attributes("-modified", 1) # sets black dot in toplevel's close button (mac)

and

self.wm_attributes("-modified", 0) # unsets black dot in toplevel's close button (mac)

in self.modified.

回答1:

Yes, this can be done using wm_attributes and setting the "modified" flag to true.

Example:

from Tkinter import *
root= Tk();
Label(root,text='This is the Toplevel').pack(pady=10)
root.wm_attributes("-modified", 1)
root.mainloop()

来源：https://stackoverflow.com/questions/15852462/signifying-unsaved-changes-by-prepending-in-window-title-how-to-add-a-black

标签

tkinter

cross-platform