#! /bin/env python
# coding: utf8

import Tkinter as tk
import re


class HoverInfo(tk.Menu):
	def __init__(self, parent, text, statusbar, command=None):
		self._com = command
		self.statusbar = statusbar
		tk.Menu.__init__(self,parent, tearoff=0)
		if not isinstance(text, str):
			raise TypeError('Trying to initialise a Hover Menu with a non string type: ' + text.__class__.__name__)
		toktext=re.split('\n', text)
		for t in toktext:
			self.add_command(label = t)
		self.text = text
		self._displayed=False
		self.master.bind("<Enter>",self.Display )
		self.master.bind("<Leave>",self.Remove )
		
	def __del__(self):
		self.master.unbind("<Enter>")
		self.master.unbind("<Leave>")
 
	def Display(self,event):
		if not self._displayed:
			self._displayed=True
			self.statusbar.set(self.text)
			#self.post(event.x_root, event.y_root)
		if self._com != None:
			self.master.unbind_all("<Return>")
			self.master.bind_all("<Return>", self.Click)
 
	def Remove(self, event):
		if self._displayed:
			self.statusbar.set("")
			self._displayed=False
			self.unpost()
		if self._com != None:
			self.unbind_all("<Return>")
 
	def Click(self, event):
		self._com()