91 lines
2.4 KiB
Python
91 lines
2.4 KiB
Python
from tkinter import *
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class WindowList:
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def __init__(self):
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self.dict = {}
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self.callbacks = []
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def add(self, window):
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window.after_idle(self.call_callbacks)
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self.dict[str(window)] = window
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def delete(self, window):
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try:
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del self.dict[str(window)]
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except KeyError:
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# Sometimes, destroy() is called twice
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pass
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self.call_callbacks()
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def add_windows_to_menu(self, menu):
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list = []
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for key in self.dict:
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window = self.dict[key]
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try:
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title = window.get_title()
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except TclError:
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continue
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list.append((title, key, window))
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list.sort()
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for title, key, window in list:
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menu.add_command(label=title, command=window.wakeup)
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def register_callback(self, callback):
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self.callbacks.append(callback)
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def unregister_callback(self, callback):
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try:
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self.callbacks.remove(callback)
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except ValueError:
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pass
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def call_callbacks(self):
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for callback in self.callbacks:
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try:
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callback()
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except:
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t, v, tb = sys.exc_info()
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print("warning: callback failed in WindowList", t, ":", v)
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registry = WindowList()
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add_windows_to_menu = registry.add_windows_to_menu
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register_callback = registry.register_callback
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unregister_callback = registry.unregister_callback
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class ListedToplevel(Toplevel):
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def __init__(self, master, **kw):
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Toplevel.__init__(self, master, kw)
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registry.add(self)
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self.focused_widget = self
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def destroy(self):
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registry.delete(self)
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Toplevel.destroy(self)
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# If this is Idle's last window then quit the mainloop
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# (Needed for clean exit on Windows 98)
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if not registry.dict:
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self.quit()
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def update_windowlist_registry(self, window):
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registry.call_callbacks()
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def get_title(self):
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# Subclass can override
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return self.wm_title()
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def wakeup(self):
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try:
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if self.wm_state() == "iconic":
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self.wm_withdraw()
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self.wm_deiconify()
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self.tkraise()
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self.focused_widget.focus_set()
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except TclError:
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# This can happen when the window menu was torn off.
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# Simply ignore it.
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pass
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