#!/usr/bin/env python
# -*- coding: iso-8859-15 -*-
# KMB 2008-12-24
# module for GUI text search applications

from Tkinter import *
from ScrolledText import ScrolledText
from tkFont import Font
from sys import stderr

try:
  import _winreg
  win=True
except:
  win=False

class App(Frame):
  def __init__(s,master=None,title='',action=lambda x,**y:x,init=None,fontsize=14,checkbutton=None,help='',fontfamily='Arial'):
    Frame.__init__(s,master)
    s.grid()
    s.font=Font(family=fontfamily,size=fontsize)
    s.n=0
    s.master.title(title)
    #s.master.winfo_toplevel().resizable(width=True,height=True)
    #print s.master.winfo_toplevel().resizable()
    s.action=action
    s.cb=IntVar()
    s.createWidgets(checkbutton,help)
    if init:
      msg=init()
      if msg:
        print>>stderr,msg
        exit(1)
    s.special_chars=('æ','Æ','ð','Ð','þ','Þ')
  def createWidgets(s,checkbutton,help):
    # search box...
    s.frame=Frame(s)
    s.entry=Entry(s.frame,bg='white',font=s.font)
    s.entry.bind('<Key-Return>',s.get_entry)
    s.entry.grid(row=0,column=0)
    s.searchButton=Button(s.frame,text='search',command=s.get_entry,font=s.font)
    s.searchButton.grid(row=0,column=1)
    ncols=1
    if checkbutton: # checkbutton...
      ncols+=1
      s.checkbutton=Checkbutton(s,text=checkbutton,variable=s.cb,command=s.gcb)
      s.checkbutton.grid(row=1,column=ncols)
    if help: # help button...
      ncols+=1
      s.helptext=help
      s.help=Button(s,text='help',command=s.help)
      s.help.grid(row=1,column=ncols)
    # quit button...
    ncols+=1
    s.quitButton=Button(s,text='quit',command=s.quit)
    s.quitButton.grid(row=1,column=ncols)
    # text...
    ncols+=1
    s.frame.grid(row=1,column=0)
    s.text=ScrolledText(s,bg='white',fg='blue',font=s.font)
    s.text.grid(row=0,column=0,columnspan=ncols)
  def help(s):
    s.text.insert(INSERT,'%s\n'%(s.helptext,))
    s.text.yview(MOVETO,1)
  def gcb(s):
    pass
  def get_entry(s,event=None):
    word=s.entry.get()
    result,redden=s.action(word,cb=s.cb.get())
    if result:
      s.text.mark_set('sentinel',INSERT)
      s.text.mark_gravity('sentinel',LEFT)
      s.text.insert(INSERT,'%s\n'%(result,))
      s.text.yview(MOVETO,1)
      if redden: s.redden(redden)
      s.text.mark_unset('sentinel')
      s.n+=1
  def redden(s,red=''):
    if not red: return
    start='sentinel'
    n=0
    count=IntVar()
    while s.text.compare(start,'<',END):
      ms=s.text.search(red,start,nocase=1,stopindex=END,regexp=1,count=count)
      if not ms: break
      end=str(ms)+'+ %d chars'%count.get()
      s.text.tag_add('red',ms,end)
      start=end+'+ 1 chars'
    s.text.tag_config('red',foreground='red')

def action(x,cb=None):
  return x,'abc'

if __name__=='__main__':
  app=App(title='search_gui demo by Keith Briggs',action=action,checkbutton='case sensitive',help='help text')
  app.mainloop()