[PyQt] table view/model/delegate issue

[Kerri Reno]

Hello!

I hope someone can help me with this.  I have a QTableView with 3 columns,
the 3rd column is editable, and the first two are not.  My problem is when I
double click on the 3rd column, any existing text is cleared.  I want to be
able to edit the existing text.  I'm using a QItemDelegate, and putting the
text into a QTextEdit editor.  I can't see what I'm doing wrong.  Please
take a look at my stripped down example, below.  I've highlighted the code
that I think should put the text in the editor.  What am I doing wrong?

I'm using PyQt 4.7.2 and Python 2.6.5.

Thanks in Advance for any help you can give me!
Kerri

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

class notesView(QTableView):

        def __init__(self,parent,data):

                QTableView.__init__(self,parent)
                self.setSizePolicy(QSizePolicy.MinimumExpanding,
                        QSizePolicy.MinimumExpanding)

                model = notesModel(data)
                self.setModel(model)
                self.setItemDelegate(notesDelegate(self))
                self.setFixedWidth(400)
                self.show()

class notesModel(QAbstractTableModel):

        def __init__(self,data):
                QAbstractTableModel.__init__(self)
                self.notes = data

        def flags(self,index):
                if not index.isValid():
                        return Qt.ItemIsEnabled
                column = index.column()
                if column == 2:
                        return
Qt.ItemFlags(QAbstractTableModel.flags(self,index)|
                                        Qt.ItemIsEditable)
                return Qt.ItemFlags(QAbstractTableModel.flags(self,index))

        def rowCount(self, index=QModelIndex()):
                return len(self.notes)

        def columnCount(self,index=QModelIndex()):
                return 3

        def data(self,index,role=Qt.DisplayRole):
                if not index.isValid() or not (0 <= index.row() <
len(self.notes)):
                        return QVariant()

                note = self.notes[index.row()]
                column = index.column()

                if role == Qt.DisplayRole:
                        if column ==  0:
                                return
QVariant(QDate(note['stamp']).toString('MM/dd/yyyy'))
                        elif column == 1:
                                return
QVariant(QString("%1").arg(note['print_name']))
                        elif column == 2:
                                if note['note']:
                                        return
QVariant(QString("%1").arg(note['note']))
                                else:
                                        return QVariant('')
                elif role == Qt.TextAlignmentRole:
                        return QVariant(int(Qt.AlignLeft|Qt.AlignTop))

                return QVariant()

        def setData(self, index, value, role=Qt.EditRole):
                if index.isValid() and 0 <= index.row() < len(self.notes):
                        note = self.notes[index.row()]
                        column = index.column()
                        if column == 2:
                                note['note'] =
str(value.toString().trimmed())
                                note['stamp'] = datetime.datetime.now()
                        return True
                return False

class notesDelegate(QItemDelegate):

        def createEditor(self,parent,option,index):
                if index.column() == 2:
                        text = index.model().data(index).toString()
                        editor = QTextEdit(parent)
                        editor.setPlainText(text)
                        return editor
                else:
                        return
QItemDelegate.createEditor(self,parent,option,index)

        def setModelData(self, editor, model, index):
                if index.column() == 2:
                        model.setData(index,QVariant(editor.toPlainText()))
                else:
                        QItemDelegate.setModelData(self, editor, model,
index())

if __name__ == '__main__':

        app = QApplication(sys.argv)
        data = [{'note' : 'testing',
                'print_name' : 'John Anderson',
                'stamp' : datetime.datetime(2011,3,9,11,26,16)}]
        dlg = notesView(None,data = data)
        app.exec_()
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