Pyside --> Filtered (pattern), directory file list (via: QtCore.QAbstractListModel)

dirFileListModel.py

#!/usr/bin/env python
#coding:utf-8

# -- This line is 75 characters -------------------------------------------

# -------------------------------------------------------------------------
# -------------------------------------------------------------------------
# version: 0.1
# date: 12/15/2014
# author: jGalloway
# -------------------------------------------------------------------------
# -------------------------------------------------------------------------

import os, sys

#site-library imports
from PySide import QtCore, QtGui

# project imports
from bp_helpers import synthesize  # storage/variable gettr/settr convenience class
from bp_packages.bp_files.bp_path import Path  # path convenience class

#################################################################### 
class dirFileListModel(QtCore.QAbstractListModel): 
    def __init__(self, inRootPath=None, pattern='*.txt', parent=None, *args): 
        """
        takes a path
        gens a list of files matching pattern
        data = each file is a item
        """
        super(dirFileListModel, self).__init__()
        
        #synthesize(self, '_fileCount', 0)
        
        if inRootPath == None:  # in case we got nothing, just make it empty
            inRootPath = ''
            
        if not isinstance(inRootPath, Path):
            inRootPath = Path(inRootPath)
        
        synthesize(self, '_inRootPath', inRootPath)
        synthesize(self, '_pattern', pattern)
        
        if self._inRootPath != '' or len(self._inRootPath) >0:
            self.genList(self._pattern)
    
    # --------------------------------------------------------------------
    def genList(self, pattern='*.txt'):
        try:
            self._listData = self._inRootPath.files(pattern)
        except:
            synthesize(self, '_listData', self._inRootPath.files(pattern))
            
        return self._listData
    
    # --------------------------------------------------------------------
    def rowCount(self, parent=QtCore.QModelIndex()):
        return len(self._listData)
 
    # --------------------------------------------------------------------
    def data(self, index, role=QtCore.Qt.DisplayRole):
        if not index.isValid():
            return None

        if index.row() >= len(self._listData) or index.row() < 0:
            return None

        if role == QtCore.Qt.DisplayRole:
            return self._listData[index.row()]
        
###########################################################################
# --call block-------------------------------------------------------------
if __name__ == "__main__":
    '''Allows the script to be run as main()'''
    
    testPath = Path(r'c:\\project\\dir')
    
    testModel = dirFileListModel(testPath)

    #should print the number of files in the dir matching the pattern
    print testModel.rowCount()