# general purpose 'tooltip' routines - currently unused in idlefork# (although the 'calltips' extension is partly based on this code)# may be useful for some purposes in (or almost in ;) the current project scope# Ideas gleaned from PySol from Tkinter import * class ToolTipBase:     def __init__(self, button):        self.button = button        self.tipwindow = None        self.id = None        self.x = self.y = 0        self._id1 = self.button.bind("<Enter>", self.enter)        self._id2 = self.button.bind("<Leave>", self.leave)        self._id3 = self.button.bind("<ButtonPress>", self.leave)     def enter(self, event=None):        self.schedule()     def leave(self, event=None):        self.unschedule()        self.hidetip()     def schedule(self):        self.unschedule()        self.id = self.button.after(1500, self.showtip)     def unschedule(self):        id = self.id        self.id = None        if id:            self.button.after_cancel(id)     def showtip(self):        if self.tipwindow:            return        # The tip window must be completely outside the button;        # otherwise when the mouse enters the tip window we get        # a leave event and it disappears, and then we get an enter        # event and it reappears, and so on forever :-(        x = self.button.winfo_rootx() + 20        y = self.button.winfo_rooty() + self.button.winfo_height() + 1        self.tipwindow = tw = Toplevel(self.button)        tw.wm_overrideredirect(1)        tw.wm_geometry("+%d+%d" % (x, y))        self.showcontents()     def showcontents(self, text="Your text here"):        # Override this in derived class        label = Label(self.tipwindow, text=text, justify=LEFT,                      background="#ffffe0", relief=SOLID, borderwidth=1)        label.pack()     def hidetip(self):        tw = self.tipwindow        self.tipwindow = None        if tw:            tw.destroy() class ToolTip(ToolTipBase):    def __init__(self, button, text):        ToolTipBase.__init__(self, button)        self.text = text    def showcontents(self):        ToolTipBase.showcontents(self, self.text) class ListboxToolTip(ToolTipBase):    def __init__(self, button, items):        ToolTipBase.__init__(self, button)        self.items = items    def showcontents(self):        listbox = Listbox(self.tipwindow, background="#ffffe0")        listbox.pack()        for item in self.items:            listbox.insert(END, item) def main():    # Test code    root = Tk()    b = Button(root, text="Hello", command=root.destroy)    b.pack()    root.update()    tip = ListboxToolTip(b, ["Hello", "world"])    root.mainloop() if __name__ == '__main__':    main()