# -*- coding: utf-8 -*-

# Copyright (c) 2006 - 2013 Detlev Offenbach <detlev@die-offenbachs.de>
#

"""
Module implementing the browser sort filter proxy model.
"""

from PyQt4.QtCore import *
from PyQt4.QtGui import *

from UI.BrowserSortFilterProxyModel import BrowserSortFilterProxyModel
from ProjectBrowserModel import ProjectBrowserSourceType

import Preferences

class ProjectBrowserSortFilterProxyModel(BrowserSortFilterProxyModel):
    """
    Class implementing the browser sort filter proxy model.
    """
    def __init__(self, filterType, parent = None):
        """
        Constructor
        
        @param filterType type of filter to apply
        @param parent reference to the parent object (QObject)
        """
        BrowserSortFilterProxyModel.__init__(self, parent)
        self.__filterType = filterType
        self.setDynamicSortFilter(True)
        self.hideGeneratedForms = Preferences.getProject("HideGeneratedForms")
        
    def filterAcceptsRow(self, source_row, source_parent):
        """
        Protected method to filter rows.
        
        It implements a filter to suppress the display of non public
        classes, methods and attributes.
        
        @param source_row row number (in the source model) of item (integer)
        @param source_parent index of parent item (in the source model)
            of item (QModelIndex)
        @return flag indicating, if the item should be shown (boolean)
        """
        sindex = self.sourceModel().index(source_row, 0, source_parent)
        if not sindex.isValid():
            return False
        sitem = self.sourceModel().item(sindex)
        try:
            if not self.__filterType in sitem.getProjectTypes():
                return False
            if self.hideGeneratedForms and \
               self.__filterType == ProjectBrowserSourceType and \
               QString(sitem.data(0)).startsWith("Ui_"):
                return False
        except AttributeError:
            pass
        
        if self.hideNonPublic:
            return sitem.isPublic()
        else:
            return True
    
    def preferencesChanged(self):
        """
        Public slot called to handle a change of the preferences settings.
        """
        BrowserSortFilterProxyModel.preferencesChanged(self)
        
        hideGeneratedForms = Preferences.getProject("HideGeneratedForms")
        if self.hideGeneratedForms != hideGeneratedForms:
            self.hideGeneratedForms = hideGeneratedForms
            self.filterChanged()
