Python PyQt - MVC Pattern - Model Class To Work Wi

Question

I am trying to learn pyQt programming in a MVC pattern(which in QT there is not controller, so really just Model/View). I have try1.py which is the graphics I made from QT designer. In that, I have 2 line edit boxes- Username and Password. Then I have test.py which is the actual python script.

1) Since the text lines widgets are nested in the global Ui_Form....how would I assign the model to them? typically I would use something like widgetView = setModel(model) but I don't know how to do this with self.lineEdit = QtGui.QLineEdit(Form). Since I am trying to use MVC I assume this needs to be outside of Ui_Form class?

2) Would I have 2 different models- 1 for username widget and 1 for password?

3) How would I get the TextLineModel to update the fields in the X object instance and the View get updated as well?

This is the try1.py QT Editor already compiled by pyuic.py:

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

# Form implementation generated from reading ui file 'try1.ui'
#
# Created: Mon May 27 04:00:05 2013
#      by: PyQt4 UI code generator 4.10.1
#
# WARNING! All changes made in this file will be lost!

from PyQt4 import QtCore, QtGui

try:
    _fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
    def _fromUtf8(s):
        return s

try:
    _encoding = QtGui.QApplication.UnicodeUTF8
    def _translate(context, text, disambig):
        return QtGui.QApplication.translate(context, text, disambig, _encoding)
except AttributeError:
    def _translate(context, text, disambig):
        return QtGui.QApplication.translate(context, text, disambig)

    class Ui_Form(object):
        def setupUi(self, Form):
            Form.setObjectName(_fromUtf8("Form"))
            Form.resize(640, 480)
            self.label = QtGui.QLabel(Form)
            self.label.setGeometry(QtCore.QRect(100, 30, 71, 16))
            self.label.setObjectName(_fromUtf8("label"))
            self.label_2 = QtGui.QLabel(Form)
            self.label_2.setGeometry(QtCore.QRect(100, 60, 61, 16))
            self.label_2.setObjectName(_fromUtf8("label_2"))
            self.lineEdit = QtGui.QLineEdit(Form)
            self.lineEdit.setGeometry(QtCore.QRect(160, 30, 231, 20))
            self.lineEdit.setObjectName(_fromUtf8("lineEdit"))
            self.lineEdit_2 = QtGui.QLineEdit(Form)
            self.lineEdit_2.setGeometry(QtCore.QRect(160, 60, 231, 20))
            self.lineEdit_2.setObjectName(_fromUtf8("lineEdit_2"))
            self.verticalLayoutWidget = QtGui.QWidget(Form)
            self.verticalLayoutWidget.setGeometry(QtCore.QRect(80, 20, 361, 81))
            self.verticalLayoutWidget.setObjectName(_fromUtf8("verticalLayoutWidget"))
            self.verticalLayout_2 = QtGui.QVBoxLayout(self.verticalLayoutWidget)
            self.verticalLayout_2.setMargin(0)
            self.verticalLayout_2.setObjectName(_fromUtf8("verticalLayout_2"))

            self.retranslateUi(Form)
            QtCore.QMetaObject.connectSlotsByName(Form)

        def retranslateUi(self, Form):
            Form.setWindowTitle(_translate("Form", "Form", None))
            self.label.setText(_translate("Form", "UserName:", None))
            self.label_2.setText(_translate("Form", "Password:", None))

This is the script test.py script:

import sys
from PyQt4 import QtCore, QtGui

from untitled import Ui_Form
from collections import OrderedDict

class GetInfo():
    def __init__(self):
        self.info = OrderedDict([('userName', None),
                     ('passWord', ' ')]

    def login_name(self):
        name = raw_input("Enter Login Name: ")
        self.login_info["login_name"] = name

    def password(self):
        name = raw_input("Enter Password: ")
        self.login_info["password"] = name


class TextLineModel(QtCore.QAbstractListModel):
        def __init__(self, text, parent = none):
             QtCore.QAbstractListModel.__init__(self, parent)
             self._text = text

         def data(self, index, roll):
                if role == QtCore.Qt.DisplayRole:
                    value = self._text
                    return value



class MyForm(QtGui.QMainWindow):
    def __init__(self, parent=None):
        QtGui.QWidget.__init__(self, parent)
        self.ui = Ui_Form()
        self.ui.setupUi(self)


if __name__ == "__main__":
    x = GetInfo()
    app = QtGui.QApplication(sys.argv)
    myapp = MyForm()
    myapp.show()
    sys.exit(app.exec_())

Answer 1

1) You have to link up your model and your widgets using QDataWidgetmapper.

2)No, you should have a single model for a single class of data. In your case it should be QAbstractTablemodel.

3)You can call QDataWidgetmapper.revert() to update widgets with data from the model. The model is either updated automatically after user is done with widget editing, or by manually calling QDataWidgetmapper.submit() (see QDataWidgetmapper.submitPolicy)