#! /usr/bin/env python
# -*- coding: shift_jis -*-

"""
jmemo.py 

It works on Win and Linux.
July 06, 2005
"""

import Tkinter as Tk
import ScrolledText as S
import tkFileDialog as D
import os


## classes -----------------------------------------------------------------------------------

class Frame(Tk.Frame):
    """ The main class of this program. """
    
    def __init__(self, master=None):
        Tk.Frame.__init__(self, master)
        self.master.title(os.name=='posix' and 'untitled' or u'無題')
        self.file_name=None

        ### Menu
        menu_bar = Tk.Menu(self, tearoff=0)
        # File
        menu_file = Tk.Menu(menu_bar, tearoff=0)
        menu_bar.add_cascade(label=u"ファイル(F)", menu=menu_file,  underline=5)
        menu_file.add_command(label=u"新規作成(N)", command=self.new_memo, underline=5, accelerator = 'Ctrl-N')
        menu_file.add_command(label=u"開く(O)", command=self.open_memo, underline=3, accelerator = 'Ctrl-O')
        menu_file.add_command(label=u"保存(S)", command=self.save_memo, underline=3, accelerator = 'Ctrl-S')
        menu_file.add_command(label=u"名前をつけて保存(A)", command=self.saveas_memo, underline=9)
        menu_file.add_separator()
        menu_file.add_command(label=u"終了(Q)", command=self.exit, underline=3 , accelerator = 'Ctrl-Q')

        # Edit
        menu_edit = Tk.Menu(menu_bar, tearoff=0)
        menu_bar.add_cascade(label=u'編集(E)', menu=menu_edit, underline=3)
        menu_edit.add_command(label=u'全てを選択(A)', command=self.select_all, underline=6, accelerator = 'Ctrl-A')
        menu_edit.add_command(label=u'切り取り(X)', command=self.cut, underline=5,
                              accelerator = os.name=='posix' and 'Ctrl-W' or 'Ctrl-X')
        menu_edit.add_command(label=u'コピー(C)', command=self.copy, underline=4,
                              accelerator = os.name=='posix' and 'Alt-W' or 'Ctrl-C')
        menu_edit.add_command(label=u'ペースト(V)', command=self.paste, underline=5, 
                              accelerator = os.name=='posix' and 'Ctrl-Y' or 'Ctrl-V')
        menu_edit.add_command(label=u'カーソルのある行を削除', command=self.delete_line, accelerator = 'Shift-Del')
                              



        # short-cuts
        self.master.bind('<Control-KeyPress-o>', self.open_memo)
        self.master.bind('<Control-KeyPress-s>', self.save_memo)
        self.master.bind('<Control-KeyPress-q>', self.exit)
        self.master.bind('<Control-KeyPress-a>', self.select_all)
        self.master.bind('<Shift-KeyPress-Delete>', self.delete_line)
        self.master.bind('<Double-Button-1>', self.delete_line)
        if os.name == 'posix':
            self.master.bind('<Alt-KeyPress-w>', self.copy)

        # add menu bar
        try:
            self.master.config(menu=menu_bar)     # this required to show the menu bar
        except AttributeError:
            self.master.Tk.call(master, "config", "-menu", menu_bar)


        self.txt = S.ScrolledText(self, font=('Helvetica', '10'))
        self.txt.pack(fill=Tk.BOTH, expand=1)
        self.txt.focus_set()


    def new_memo(self, event=None):
        self.file_name=None
        self.master.title(os.name=='posix' and 'untitled' or u'無題')
        self.txt.delete('1.0', Tk.END)


    def open_memo(self, event=None):
        fname = D.askopenfilename(filetypes =[('text files', '*.txt'), ('all files', '*.*')])
                                   
        if fname:
            self.txt.delete('1.0', Tk.END)
            f=file(fname)
            self.txt.insert(Tk.END, f.read().decode('shift_jis'))  ## decode is required to show data
            f.close()
            self.file_name = fname
            self.master.title(fname)


    def save(self, f):
        f.write(self.txt.get('1.0', Tk.END).encode('shift_jis')) ## encode is required to write data
        f.close()
            
    def save_memo(self, event=None):
        if self.file_name:
            self.save(file(self.file_name, 'w'))
        else:
            self.saveas_memo()

    def saveas_memo(self):
        fname = D.asksaveasfilename(filetypes =[('text files', '*.txt')])
        if fname:
            self.save(file(fname, 'w'))
            self.file_name=fname
            self.master.title(fname)


    def select_all(self, event=None):
        self.txt.tag_add(Tk.SEL, '1.0', Tk.END+'-1c')
        self.txt.mark_set(Tk.INSERT, '1.0')
        self.txt.see(Tk.INSERT)

    def cut(self, event=None):
        if self.txt.tag_ranges(Tk.SEL):
            self.copy()
            self.txt.delete(Tk.SEL_FIRST, Tk.SEL_LAST)

    def copy(self, event=None): 
        if self.txt.tag_ranges(Tk.SEL): 
            text = self.txt.get(Tk.SEL_FIRST, Tk.SEL_LAST)  
            self.clipboard_clear()              
            self.clipboard_append(text)

    def paste(self, event=None):
        text = self.selection_get(selection='CLIPBOARD')
        if text:
            self.txt.insert(Tk.INSERT, text)
            self.txt.tag_remove(Tk.SEL, '1.0', Tk.END) 
            self.txt.see(Tk.INSERT)

    def delete_line(self, event=None):
        self.txt.delete(Tk.INSERT + " linestart", Tk.INSERT + " lineend")
        
    def exit(self, event=None):
        self.master.destroy()

##------------------------------------------------ 

if __name__ == '__main__':
    f = Frame()
    f.pack()
    f.mainloop()