[PyQt] Can't get QCheckBox to work in a QTableView

[Chris Dunscombe]

Hi,

I'm trying to have a checkable column plus label with other columns in a table. I can't use
QTableWidget as one of the other columns is a ComboBox. After much trying, googling and reading of
Mark's excellent new book I just can't get it to work. I'm clearly doing something wrong

Main problem is that the label doesn't display unless it's being clicked. Also I can't check the
checkbox unless I've previously double-clicked in the area where the label is.

I'm using PyQt 4.3.1 and Python 2.5.1 on SUSE 10.2.

Any help, especially any real code examples etc as I'm really stuck and confused, much
appreciated.

Here's my trimmed down code with just the single column for the checkbox to show my problem. It
should run as is. 

Thanks,

Chris


#!/usr/bin/env python

import sys, os
print os.environ["PYTHONPATH"]
print sys.version
from PyQt4.QtCore import *
from PyQt4.QtGui import *

class window(QWidget):
    def __init__(self, parent = None, myList = None):
        QWidget.__init__(self, parent)

        self.colsTable = myTableView(parent = self, numRows = 2, dataObj = myList)
        mainLayout = QHBoxLayout()
        mainLayout.addWidget(self.colsTable)
        self.setLayout(mainLayout)
        index1 = self.colsTable.model.index(0, 0, QModelIndex())
        self.colsTable.model.setData(index1,Qt.Checked ,Qt.CheckStateRole)

class myTableView(QTableView):

    def __init__(self, parent = None, numRows = 0, dataObj = None):
        super(myTableView, self).__init__(parent)
        self.dataObj = dataObj

        # Setup the model
        self.model = myModel(dataObj = dataObj)

        self.setModel(self.model)
        # Add the single column
        self.model.insertColumn(0)

        # Add the rows
        for dummy in range(numRows):
            self.model.insertRow(0)

        self.itemDelegate = myDelegate(label = "Advanced", parent = parent)
        self.setItemDelegate(self.itemDelegate)

class myDelegate(QItemDelegate):

    def __init__(self, label = None, parent = None):
        super(myDelegate, self).__init__(parent)
        self.label = label

    def createEditor(self, parent, option, index):
        editor = QCheckBox(self.label, parent)
        return editor

    def setEditorData(self, editor, index):
        value = index.model().data(index, Qt.CheckStateRole).toInt()
        if value[0] == 0:
            checkState = Qt.Unchecked
        else:
            checkState = Qt.Checked
        editor.setCheckState(checkState)
        # Set the label again, just in case.
        editor.setText(self.label)

    def setModelData(self, editor, model, index):
        value = editor.checkState()
        model.setData(index, value, Qt.CheckStateRole)

    def updateEditorGeometry(self, editor, option, index):
        editor.setGeometry(option.rect)

class myModel(QStandardItemModel):

    def __init__(self, parent=None, dataObj = None):
        super(myModel, self).__init__(parent)
        self.dataObj = dataObj


    def data(self, index, role=Qt.DisplayRole):

        if role == Qt.CheckStateRole:
            if self.dataObj[index.row()] == 0:
                return QVariant(Qt.Unchecked)
            else:
                return QVariant(Qt.Checked)
        else:
            return QVariant()


    def setData(self, index, value, role):

        if role == Qt.CheckStateRole:
            if value == Qt.Checked:
                self.dataObj[index.row()] = 1
            else:
                self.dataObj[index.row()] = 0
        else:
            print "Set data with no CheckStateRole"

        self.emit(SIGNAL("dataChanged(QModelIndex,QModelIndex)"),index, index)
        return True

    def flags(self, index):
        if index.column() == 0:
            return Qt.ItemIsEnabled | Qt.ItemIsEditable | Qt.ItemIsUserCheckable |
Qt.ItemIsSelectable
        else:
            return Qt.ItemIsEnabled


myList = []
myList.append(0)
myList.append(1)

a = QApplication(sys.argv)
w = window(myList = myList)
w.show()
sys.exit(a.exec_())


      ____________________________________________________________________________________
Be a better pen pal. 
Text or chat with friends inside Yahoo! Mail. See how.  http://overview.mail.yahoo.com/