#!/usr/bin/python
''' a widget that shows only a dir listing
 '''

import sys,os,argparse
from PyQt4.QtGui import *
from PyQt4 import QtGui, QtCore

class DirWidget(QListWidget):
	''' a simple widget that shows a list of directories, staring
	at the directory passed into the constructor

	a mouse click or 'enter' key will send a 'selected' signal to
	anyone who connects to this.

	the .. parent directory is shown for all dirs except /

	the most interesting parts of the interface are:
	constructor - send in the directory to view
	method - currentPath() returns text of current path
	signal - selected calls a slot with a single arg: new path
	'''

	selected = QtCore.pyqtSignal(str)
	def __init__(self, directory='.', parent=None):
		super(DirWidget,self).__init__(parent)
		self.directory = directory
		self.refill()
		self.itemActivated.connect(self.selectionByLWI)
		# it would be nice to pick up single-mouse-click for selection as well
		# but that seems to be a system-preferences global
	def selectionByLWI(self, li):
		self.directory = os.path.abspath(self.directory + '/' + str(li.text()))
		self.refill()
		self.selected.emit(self.directory)
	def refill(self):
		current,dirs,files =  os.walk(self.directory,followlinks=True).next()
		dirs.sort()
		if '/' not in dirs:
			dirs = ['..'] + dirs
		self.clear()
		for d in dirs:
			li = QListWidgetItem(d,self)
	def currentPath(self):
		return self.directory
		
if __name__=="__main__":
	def alert(some_text):
		os.system('notify-send -t 1500 "file: '+str(some_text) + '"')

	a = QApplication([])

	qmw = QMainWindow()
	dw = DirWidget(parent=qmw)
	dw.selected.connect(alert)
	
	qmw.setCentralWidget(dw)
	qmw.show()
	
	a.exec_()