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//usr/lib/python2.4/idlelib/CallTipWindow.py
"""A CallTip window class for Tkinter/IDLE. After ToolTip.py, which uses ideas gleaned from PySol Used by the CallTips IDLE extension. """ from Tkinter import * class CallTip: def __init__(self, widget): self.widget = widget self.tipwindow = None self.id = None self.x = self.y = 0 def showtip(self, text): " Display text in calltip window" # truncate overly long calltip if len(text) >= 79: text = text[:75] + ' ...' self.text = text if self.tipwindow or not self.text: return self.widget.see("insert") x, y, cx, cy = self.widget.bbox("insert") x = x + self.widget.winfo_rootx() + 2 y = y + cy + self.widget.winfo_rooty() self.tipwindow = tw = Toplevel(self.widget) # XXX 12 Dec 2002 KBK The following command has two effects: It removes # the calltip window border (good) but also causes (at least on # Linux) the calltip to show as a top level window, burning through # any other window dragged over it. Also, shows on all viewports! tw.wm_overrideredirect(1) tw.wm_geometry("+%d+%d" % (x, y)) try: # This command is only needed and available on Tk >= 8.4.0 for OSX # Without it, call tips intrude on the typing process by grabbing # the focus. tw.tk.call("::tk::unsupported::MacWindowStyle", "style", tw._w, "help", "noActivates") except TclError: pass label = Label(tw, text=self.text, justify=LEFT, background="#ffffe0", relief=SOLID, borderwidth=1, font = self.widget['font']) label.pack() def hidetip(self): tw = self.tipwindow self.tipwindow = None if tw: tw.destroy() ############################### # # Test Code # class container: # Conceptually an editor_window def __init__(self): root = Tk() text = self.text = Text(root) text.pack(side=LEFT, fill=BOTH, expand=1) text.insert("insert", "string.split") root.update() self.calltip = CallTip(text) text.event_add("<<calltip-show>>", "(") text.event_add("<<calltip-hide>>", ")") text.bind("<<calltip-show>>", self.calltip_show) text.bind("<<calltip-hide>>", self.calltip_hide) text.focus_set() root.mainloop() def calltip_show(self, event): self.calltip.showtip("Hello world") def calltip_hide(self, event): self.calltip.hidetip() def main(): # Test code c=container() if __name__=='__main__': main()