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      1 # general purpose 'tooltip' routines - currently unused in idlefork
      2 # (although the 'calltips' extension is partly based on this code)
      3 # may be useful for some purposes in (or almost in ;) the current project scope
      4 # Ideas gleaned from PySol
      5 
      6 from Tkinter import *
      7 
      8 class ToolTipBase:
      9 
     10     def __init__(self, button):
     11         self.button = button
     12         self.tipwindow = None
     13         self.id = None
     14         self.x = self.y = 0
     15         self._id1 = self.button.bind("<Enter>", self.enter)
     16         self._id2 = self.button.bind("<Leave>", self.leave)
     17         self._id3 = self.button.bind("<ButtonPress>", self.leave)
     18 
     19     def enter(self, event=None):
     20         self.schedule()
     21 
     22     def leave(self, event=None):
     23         self.unschedule()
     24         self.hidetip()
     25 
     26     def schedule(self):
     27         self.unschedule()
     28         self.id = self.button.after(1500, self.showtip)
     29 
     30     def unschedule(self):
     31         id = self.id
     32         self.id = None
     33         if id:
     34             self.button.after_cancel(id)
     35 
     36     def showtip(self):
     37         if self.tipwindow:
     38             return
     39         # The tip window must be completely outside the button;
     40         # otherwise when the mouse enters the tip window we get
     41         # a leave event and it disappears, and then we get an enter
     42         # event and it reappears, and so on forever :-(
     43         x = self.button.winfo_rootx() + 20
     44         y = self.button.winfo_rooty() + self.button.winfo_height() + 1
     45         self.tipwindow = tw = Toplevel(self.button)
     46         tw.wm_overrideredirect(1)
     47         tw.wm_geometry("+%d+%d" % (x, y))
     48         self.showcontents()
     49 
     50     def showcontents(self, text="Your text here"):
     51         # Override this in derived class
     52         label = Label(self.tipwindow, text=text, justify=LEFT,
     53                       background="#ffffe0", relief=SOLID, borderwidth=1)
     54         label.pack()
     55 
     56     def hidetip(self):
     57         tw = self.tipwindow
     58         self.tipwindow = None
     59         if tw:
     60             tw.destroy()
     61 
     62 class ToolTip(ToolTipBase):
     63     def __init__(self, button, text):
     64         ToolTipBase.__init__(self, button)
     65         self.text = text
     66     def showcontents(self):
     67         ToolTipBase.showcontents(self, self.text)
     68 
     69 class ListboxToolTip(ToolTipBase):
     70     def __init__(self, button, items):
     71         ToolTipBase.__init__(self, button)
     72         self.items = items
     73     def showcontents(self):
     74         listbox = Listbox(self.tipwindow, background="#ffffe0")
     75         listbox.pack()
     76         for item in self.items:
     77             listbox.insert(END, item)
     78 
     79 def main():
     80     # Test code
     81     root = Tk()
     82     b = Button(root, text="Hello", command=root.destroy)
     83     b.pack()
     84     root.update()
     85     tip = ListboxToolTip(b, ["Hello", "world"])
     86     root.mainloop()
     87 
     88 if __name__ == '__main__':
     89     main()
     90