#!/usr/bin/env python
#
#copied from $Id: OptionColorButton.py,v 1.6 2001/11/03 11:05:22 doughellmann Exp $


"""Button which controls a file chooser dialog.

  This button type is intended to be used in a preferences dialog.
  The 'PrefsDialog' and 'TagAttributeChooserDialog' use this.

"""


#
# Import system modules
#
import Pmw
from Tkinter import *
from tkFileDialog import askopenfilename


#
# Import Local modules
#


#
# Module
#


class OptionFileChooserButton(Pmw.LabeledWidget):
    """Button to use in option dialog to let the user choose a File.

    Options

      'variable' -- The Tkinter StringVar instance which should be
      keep up to date with the option value.
      
    """
    
    def __init__(self, parent=None, **kw):
        optiondefs = (
            ('variable', None, Pmw.INITOPT),
            ('command', None, Pmw.INITOPT),
            )
        self.internal_variable = StringVar()
        self.internal_variable.trace('w', self.variable_trace)
        self.defineoptions(kw, optiondefs)
        Pmw.LabeledWidget.__init__(self, parent=parent)
        interior = self.interior()
        l = self.createcomponent(
            'label1',
            (), None,
            Label,
            (interior,),
            text='    ',
            relief='raised',
            )
        l.pack(
            side=LEFT,
            fill=X,
            )
        w = self.createcomponent(
            'button',
            (), None,
            Button,
            (interior,),
            text=u'Pick\u2026',
            command=self.command,
            )
        w.pack(
            side=LEFT,
            expand=YES,
            fill=X,
            )
        w.grid_columnconfigure( 1, weight=1 )
        self.initialiseoptions(self.__class__)
        if self['variable']:
            self.internal_variable.set(self['variable'].get())
        return

    def variable_trace(self, *args):
        "Follow the variable changes as associated with user actions."
        #print 'tracing ', args
        current_val = self.internal_variable.get()
        self.configure(label1_text=current_val)
        if self['variable']:
            self['variable'].set(current_val)
        return
    
    def command(self, *args):
        "Callback called when user clicks on button."
        default = self.internal_variable.get()
        fn = askopenfilename( filetypes=[('All Types','*'),('vcf','*.vcf')], initialfile=default)
        #print 'filanem is ', fn
        if fn:
            #@@make sure readable?
            self.internal_variable.set(fn)
        if self['command']:
            self['command']()
        return
    
    def get(self):
        "Return the file name."
        return self.internal_variable.get()

    def set(self, newVal):
        "Set the file name."
        self.internal_variable.set(newVal)
        return
if __name__=='__main__':
    root = Tk()
    btn = OptionFileChooserButton(root)
    btn.pack()
    root.mainloop()