QAbstractListModel example 1

QAbstractListModel_eg_1.py

#!/usr/bin/env python

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


class MyModel(QAbstractListModel):

    def __init__(self, parent=None):
        QAbstractListModel.__init__(self, parent)
        self.__data = ['row1', 'row2', 'row3']

    def rowCount(self, parent=QModelIndex()):
        return len(self.__data)

    def data(self, index, role):
        if not index.isValid():
            return QVariant()

        if index.row() >= len(self.__data):
            return QVariant()

        if role == Qt.DisplayRole:
            return QVariant(self.__data[index.row()])
        else:
            return QVariant()


class MyWidget(QMainWindow):

    def __init__(self, parent=None):
        QWidget.__init__(self, parent)
        self.listView = QListView(self)
        model = MyModel(self)
        self.listView.setModel(model)
        self.setCentralWidget(self.listView)

if __name__ == "__main__":
    app = QApplication(sys.argv)
    widget = MyWidget()
    widget.show()
    sys.exit(app.exec_())

QAbstractListModel_eg_1_apiv2.py

#!/usr/bin/env python

from sip import setapi
setapi("QVariant", 2)

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


class MyModel(QAbstractListModel):

    def __init__(self, parent=None):
        QAbstractListModel.__init__(self, parent)
        self.__data = ['row1', 'row2', 'row3']

    def rowCount(self, parent=QModelIndex()):
        return len(self.__data)

    def data(self, index, role):
        if not index.isValid():
            return None

        if index.row() >= len(self.__data):
            return None

        if role == Qt.DisplayRole:
            return self.__data[index.row()]
        else:
            return None


class MyWidget(QMainWindow):

    def __init__(self, parent=None):
        QWidget.__init__(self, parent)
        self.listView = QListView(self)
        model = MyModel(self)
        self.listView.setModel(model)
        self.setCentralWidget(self.listView)

if __name__ == "__main__":
    app = QApplication(sys.argv)
    widget = MyWidget()
    widget.show()
    sys.exit(app.exec_())