ここでは、シンプルなテキストエディタのためのドキュメントクラスを設定します。

import W

import os
import macfs

class MyDocumentClass(W.Window):
	_untitledcounter = 1
	
        # Initialisation
        def __init__(self, path = ""):
                # get the title and data
                if not path:
                        self.title = "Untitled " + `MyDocumentClass._untitledcounter`
                        MyDocumentClass._untitledcounter = MyDocumentClass._untitledcounter + 1
                        text = ""
                elif os.path.exists(path):
                        path = macfs.ResolveAliasFile(path)[0].as_pathname()
                        dir, name = os.path.split(path)
                        self.title = name
                        f = open(path, "rb")
                        text = f.read()
                        f.close()
                        # Might read from resource fork here
                self.path = path

                # Set up the window and widgets
                W.Window.__init__(self, (600, 400), self.title, minsize = (330, 120), tabbable = 0)
                self.setupwidgets(text)
                self.editgroup.editor.changed = 0

        def setupwidgets(self, text):
                self.editgroup = W.Group((0, 0, 0, 0))
                editor = W.TextEditor((0, 0, -15,-15), text)

                self.editgroup._barx = W.Scrollbar((0, -15, -14, 16), editor.hscroll, max = 32767)
                self.editgroup._bary = W.Scrollbar((-15, 0, 16, -14), editor.vscroll, max = 32767)
                self.editgroup.editor = editor

        # Finalisation
        def close(self):
                # If things have changed, should we save before closing?
                if self.editgroup.editor.changed:
                        import EasyDialogs
                        import Qd
                        Qd.InitCursor() # XXX should be done by dialog
                        save = EasyDialogs.AskYesNoCancel('Save window �%s� before closing?' % self.title, 1)
                        if save > 0:
                                if self.domenu_save():
                                        return 1
                        elif save < 0:
                                return 1
                W.Window.close(self)
                
        # Document Menu Items
        def domenu_close(self, *args):
                return self.close()

        def domenu_save(self, *args):
                if not self.path:
                        # Will call us recursively
                        return self.domenu_save_as()
                data = self.editgroup.editor.get()
                f = open(self.path, 'wb')
                f.write(data)
                f.close()
                import macostools
                macostools.touched(self.path)
                self.editgroup.editor.changed = 0
        
        def can_save(self, menuitem):
                return self.editgroup.editor.changed or self.editgroup.editor.selchanged
                
        def domenu_save_as(self, *args):
                fss, ok = macfs.StandardPutFile('Save as:', self.title)
                if not ok: 
                        return 1
                self.path = fss.as_pathname()
                dir, name = os.path.split(self.path)
                self.title = name
                self.settitle(self.title)
                self.domenu_save()

何も大事なことはありません。一般的なメニューアイテムしか使わないし、メニューアイテムをPython IDEのメニューのように使うので、これをインポートしてドキュメントのインスタンスを作ることができます。