• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1from tkinter import Toplevel, TclError
2import sys
3
4
5class WindowList:
6
7    def __init__(self):
8        self.dict = {}
9        self.callbacks = []
10
11    def add(self, window):
12        window.after_idle(self.call_callbacks)
13        self.dict[str(window)] = window
14
15    def delete(self, window):
16        try:
17            del self.dict[str(window)]
18        except KeyError:
19            # Sometimes, destroy() is called twice
20            pass
21        self.call_callbacks()
22
23    def add_windows_to_menu(self,  menu):
24        list = []
25        for key in self.dict:
26            window = self.dict[key]
27            try:
28                title = window.get_title()
29            except TclError:
30                continue
31            list.append((title, key, window))
32        list.sort()
33        for title, key, window in list:
34            menu.add_command(label=title, command=window.wakeup)
35
36    def register_callback(self, callback):
37        self.callbacks.append(callback)
38
39    def unregister_callback(self, callback):
40        try:
41            self.callbacks.remove(callback)
42        except ValueError:
43            pass
44
45    def call_callbacks(self):
46        for callback in self.callbacks:
47            try:
48                callback()
49            except:
50                t, v, tb = sys.exc_info()
51                print("warning: callback failed in WindowList", t, ":", v)
52
53
54registry = WindowList()
55
56add_windows_to_menu = registry.add_windows_to_menu
57register_callback = registry.register_callback
58unregister_callback = registry.unregister_callback
59
60
61class ListedToplevel(Toplevel):
62
63    def __init__(self, master, **kw):
64        Toplevel.__init__(self, master, kw)
65        registry.add(self)
66        self.focused_widget = self
67
68    def destroy(self):
69        registry.delete(self)
70        Toplevel.destroy(self)
71        # If this is Idle's last window then quit the mainloop
72        # (Needed for clean exit on Windows 98)
73        if not registry.dict:
74            self.quit()
75
76    def update_windowlist_registry(self, window):
77        registry.call_callbacks()
78
79    def get_title(self):
80        # Subclass can override
81        return self.wm_title()
82
83    def wakeup(self):
84        try:
85            if self.wm_state() == "iconic":
86                self.wm_withdraw()
87                self.wm_deiconify()
88            self.tkraise()
89            self.focused_widget.focus_set()
90        except TclError:
91            # This can happen when the Window menu was torn off.
92            # Simply ignore it.
93            pass
94
95
96if __name__ == "__main__":
97    from unittest import main
98    main('idlelib.idle_test.test_window', verbosity=2)
99