The following code is based on the
Qt Spin Box Delegate Example.
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
'''
PyQt4 conversion of Qt Model-View Tutorial
The Spin Box Delegate example shows how to create an editor for a
custom delegate in the model/view framework by reusing a standard
Qt editor widget.
The model/view framework provides a standard delegate that is used
by default with the standard view classes. For most purposes, the
selection of editor widgets available through this delegate is
sufficient for editing text, boolean values, and other simple data
types. However, for specific data types, it is sometimes necessary
to use a custom delegate to either display the data in a specific
way, or allow the user to edit it with a custom control.
NOTES:
=====
In the C++ code, static_casts are used to cast the
editor to a QSpinBox; this isn't necessary in Python
last modified: 2012-01-28 jg
ref:
http://developer.qt.nokia.com/doc/qt-4.8/itemviews-spinboxdelegate.html
'''
from PyQt4.QtGui import (QApplication, QMainWindow, QItemDelegate, QTableView,
QStyleOptionViewItem, QSpinBox, QStandardItemModel)
from PyQt4.QtCore import (Qt, QModelIndex)
class SpinBoxDelegate(QItemDelegate):
def __init__(self, parent=None): # initialise base class
super(SpinBoxDelegate, self).__init__(parent)
# no further initialisation required
def createEditor(self, parent, option, index):
# create an editor that restricts values from the model
# to integers between between 0 and 100
editor = QSpinBox(parent)
editor.setMinimum(0)
editor.setMaximum(100)
return editor
def setEditorData(self, editor, index):
# get the data from the model and update the editor
value = index.model().data(index, Qt.EditRole)
editor.setValue(value)
def setModelData(self, editor, model, index):
# read the contents of the spin box and update the model
editor.interpretText()
value = editor.value()
model.setData(index, value, Qt.EditRole)
def updateEditorGeometry(self, editor, option, index):
# update the editor's geometry using information
# from the style option
editor.setGeometry(option.rect)
class MainWindow(QMainWindow):
def __init__(self, parent=None): # initialise base class
super(MainWindow, self).__init__(parent)
model = QStandardItemModel(4, 2)
tableView = QTableView(self)
tableView.setModel(model)
tableView.setItemDelegate(SpinBoxDelegate(self))
tableView.horizontalHeader().setStretchLastSection(True)
# insert example data
for row in range(4):
for col in range(2):
index = model.index(row, col, QModelIndex())
model.setData(index, (row + 1) * (col + 1))
self.setCentralWidget(tableView)
# main ========================================================================
def main():
import sys
app = QApplication(sys.argv)
mw = MainWindow()
mw.setWindowTitle("Spin Box Delegate Example")
mw.show()
sys.exit(app.exec_())
if __name__ == '__main__':
main()
