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