###################################

when text editor owns the window

###################################

class TextEditorMain(TextEditor, GuiMakerWindowMenu):
"""
main PyEdit windows that quit() to exit app on a Quit in GUI, and build
a menu on a window; parent may be default Tk, explicit Tk, or Toplevel:
parent must be a window, and probably should be a Tk so this isn't silently
destroyed and closed with a parent; all main PyEdit windows check all other
PyEdit windows open in the process for changes on a Quit in the GUI, since
a quit() here will exit the entire app; the editor's frame need not occupy
entire window (may have other parts: see PyView), but its Quit ends program;
onQuit is run for Quit in toolbar or File menu, as well as window border X;
"""
def init(self, parent=None, loadFirst='', loadEncode=''):

editor fills whole parent window

GuiMaker.init(self, parent) # use main window menus
TextEditor.init(self, loadFirst, loadEncode) # GuiMaker frame packs self
self.master.title('PyEdit ' + Version) # title, wm X if standalone
self.master.iconname('PyEdit')
self.master.protocol('WM_DELETE_WINDOW', self.onQuit)
TextEditor.editwindows.append(self)

def onQuit(self): # on a Quit request in the GUI
close = not self.text_edit_modified() # check self, ask?, check others
if not close:
close = askyesno('PyEdit', 'Text changed: quit and discard changes?')
if close:
windows = TextEditor.editwindows
changed = [w for w in windows if w != self and w.text_edit_modified()]
if not changed:
GuiMaker.quit(self) # quit ends entire app regardless of widget type
else:
numchange = len(changed)
verify = '%s other edit window%s changed: quit and discard anyhow?'
verify = verify % (numchange, 's' if numchange > 1 else '')
if askyesno('PyEdit', verify):
GuiMaker.quit(self)

class TextEditorMainPopup(TextEditor, GuiMakerWindowMenu):
"""
popup PyEdit windows that destroy() to close only self on a Quit in GUI,
and build a menu on a window; makes own Toplevel parent, which is child
to default Tk (for None) or other passed-in window or widget (e.g., a frame);
adds to list so will be checked for changes if any PyEdit main window quits;
if any PyEdit main windows will be created, parent of this should also be a
PyEdit main window's parent so this is not closed silently while being tracked;
onQuit is run for Quit in toolbar or File menu, as well as window border X;
"""
def init(self, parent=None, loadFirst='', winTitle='', loadEncode=''):

create own window

self.popup = Toplevel(parent)

714 | Chapter 11: Complete GUI Programs