pyqt4 - Sorting by column -

i try can done can find way.

i have qtreeview displaying qfilesystemmodel custumized 2 additionnal columns (sections). work directories named date (yyyymmddhhmmss+num). 'num' @ end of string reference (an integer,ex: 04 or 12 or 53 ....) can similar other directory name. 'num' displayed in fourth column.

i group directories similar references (for exemple in ascending order) , sort directories name (date) within each group.

can give me hand please.

folders looks this:

201307     2013072400000053     2013072500000006     2013072600000053     2013072700000006     2013072800000006     2013072900000053     2013073000000006     2013073100000057 201308     2013082400000006     2013082500000053     2013082600000053     2013082700000057     2013082800000006     2013082900000057     2013083000000006     2013083100000053     ... 

code :

from pyqt4              import qtgui pyqt4              import qtcore import sys  rootpathsource = " "  class myfilesystemmodel(qtgui.qfilesystemmodel):      def columncount(self, parent = qtcore.qmodelindex()):         # add 2 additionnal columns status , instrument number          return super(myfilesystemmodel, self).columncount() + 1      def headerdata(self, section, orientation, role):         # set name 2 additionnal columns         if section == 4 , role == qtcore.qt.displayrole :            return 'number ref'         else:             return super(myfilesystemmodel, self).headerdata(section, orientation, role)      def data(self, index, role):                if index.column() == 4: #if ref             ind          = index.parent()             parentstring =  ind.data().tostring()             if parentstring in  self.fileinfo(index).filename() , self.fileinfo(index).isdir() == true , role == qtcore.qt.displayrole:                 return self.fileinfo(index).filename()[-2:] # take last 2 digits         else:             return super(myfilesystemmodel, self).data(index, role)          if role == qtcore.qt.textalignmentrole:             return qtcore.qt.alignleft  class treeviewui(qtgui.qwidget):      def __init__(self, parent=none):         super(treeviewui, self).__init__(parent)              self.model = myfilesystemmodel(self)         self.model.setrootpath(rootpathsource)          self.indexroot = self.model.index(self.model.rootpath())          self.treeview = qtgui.qtreeview(self)         self.treeview.setexpandsondoubleclick(false)         self.treeview.setmodel(self.model)         self.treeview.setrootindex(self.indexroot)         self.treeview.setcolumnwidth(0,300)          self.layout = qtgui.qvboxlayout(self)         self.layout.addwidget(self.treeview)  class maingui(qtgui.qmainwindow):       def __init__(self, parent=none):         super(maingui,self).__init__(parent)          #qtreeview widget files selection         self.view = treeviewui()            self.setcentralwidget(self.view)         self.resize(600,700)  def main():      main = maingui()     main.show()         return main  if __name__ == "__main__":      app = qtgui.qapplication(sys.argv)     startapp = main()     sys.exit(app.exec_())   

the way use qsortfilterproxymodel class.

all have create subclass of , reimplement lessthan method. method has 2 qmodelindex arguments can compared in way before returning either true or false. in case, first check column being sorted, , return value of base-class lessthan method "standard" columns. "number ref" column, first compare numerically, , if equal, compare values of "name" column same row.

to install sort-filter proxy, need do:

    self.sortfilter = mycustomsortfilterproxy(self)     self.sortfilter.setsourcemodel(self.model)     self.treeview.setmodel(self.sortfilter)