Lib/idlelib/CallTipWindow.py

   1 # A CallTip window class for Tkinter/IDLE.
   2 # After ToolTip.py, which uses ideas gleaned from PySol
   3
   4 # Used by the CallTips IDLE extension.
   5 import os
   6 from Tkinter import *
   7
   8 class CallTip:
   9
  10     def __init__(self, widget):
  11         self.widget = widget
  12         self.tipwindow = None
  13         self.id = None
  14         self.x = self.y = 0
  15
  16     def showtip(self, text):
  17         self.text = text
  18         if self.tipwindow or not self.text:
  19             return
  20         self.widget.see("insert")
  21         x, y, cx, cy = self.widget.bbox("insert")
  22         x = x + self.widget.winfo_rootx() + 2
  23         y = y + cy + self.widget.winfo_rooty()
  24         self.tipwindow = tw = Toplevel(self.widget)
  25         tw.wm_overrideredirect(1)
  26         tw.wm_geometry("+%d+%d" % (x, y))
  27         label = Label(tw, text=self.text, justify=LEFT,
  28                       background="#ffffe0", relief=SOLID, borderwidth=1,
  29                       font = self.widget['font'])
  30         label.pack()
  31
  32     def hidetip(self):
  33         tw = self.tipwindow
  34         self.tipwindow = None
  35         if tw:
  36             tw.destroy()
  37
  38
  39 ###############################
  40 #
  41 # Test Code
  42 #
  43 class container: # Conceptually an editor_window
  44     def __init__(self):
  45         root = Tk()
  46         text = self.text = Text(root)
  47         text.pack(side=LEFT, fill=BOTH, expand=1)
  48         text.insert("insert", "string.split")
  49         root.update()
  50         self.calltip = CallTip(text)
  51
  52         text.event_add("<<calltip-show>>", "(")
  53         text.event_add("<<calltip-hide>>", ")")
  54         text.bind("<<calltip-show>>", self.calltip_show)
  55         text.bind("<<calltip-hide>>", self.calltip_hide)
  56
  57         text.focus_set()
  58         # root.mainloop() # not in idle
  59
  60     def calltip_show(self, event):
  61         self.calltip.showtip("Hello world")
  62
  63     def calltip_hide(self, event):
  64         self.calltip.hidetip()
  65
  66 def main():
  67     # Test code
  68     c=container()
  69
  70 if __name__=='__main__':
  71     main()