mainwindow_controller.py

from PyQt5 import QtWidgets as Qt
from model.qtmodels.GroupListModel import GroupListModel
from model.qtmodels.PersonListModel import PersonListModel
from windows import mainwindow


class Mainwindow(Qt.QMainWindow, mainwindow.Ui_MainWindow):
    def __init__(self, db, parent=None):
        super(Mainwindow, self).__init__(parent)
        self.db = db
        self.setupUi(self)
        model = GroupListModel(self.db.get_groups())
        self.listGroups.setModel(model)
        self.listGroups.activated.connect(self.show_members)
        self.listGroups.clicked.connect(self.show_members)
        #for group in self.db.get_groups():
         #   self.listGroups.addItem(group.name)
        #self.listGroups.currentItemChanged.connect(self.show_people)
        #self.btnBrowse.clicked.connect(self.browse_folder)
        #self.list1.currentItemChanged.connect(self.show_content)

    def show_members(self, current):
        group = current.data(GroupListModel.modelRole)
        members = self.db.get_group_members(group.id)
        model = PersonListModel(members)
        self.listPeople.setModel(model)