Showing content from http://svn.python.org/projects/python/branches/py-cvs-vendor-branch/Lib/idlelib/CallTipWindow.py below:
# 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): # SF bug 546078: IDLE calltips cause application error. # There were crashes on various Windows flavors, and even a # crashing X server on Linux, with very long calltips. 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) tw.wm_overrideredirect(1) tw.wm_geometry("+%d+%d" % (x, y)) 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("< >", "(") text.event_add("< >", ")") text.bind("< >", self.calltip_show) text.bind("< >", self.calltip_hide) text.focus_set() # root.mainloop() # not in idle 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()
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