def fillInputFileEdit(self):
      lastUsedFilter = Utils.FileFilter.lastUsedVectorFilter()
      inputFile, encoding = Utils.FileDialog.getOpenFileName(self, self.tr( "Select the input file for Grid" ), Utils.FileFilter.allVectorsFilter(), lastUsedFilter, True)
      if inputFile.isEmpty():
        return
      Utils.FileFilter.setLastUsedVectorFilter(lastUsedFilter)

      self.inputLayerCombo.setCurrentIndex(-1)
      self.inputLayerCombo.setEditText(inputFile)
      self.lastEncoding = encoding

      self.loadFields( inputFile )