On Sun, 2007-12-02 at 12:00 +0100, Sibylle Koczian wrote:
> Hello, Daniel,
>
> Am Montag, 26. November 2007 13:59:52 schrieb Daniel Lundqvist:
> > Hey,
> >
> > I've been struggling to get the above to work correctly. I've looked
> > around but haven't found a solution to my problem yet.
> >
> > The issue I'm having is I can't get the mapper to update the widgets at
> > all. Not even when I call setCurrentIndex(n).
> >
> > I'm attaching my sample project that shows the problem. The sample
> > contains a simple model with two columns. One combo box show column 0
> > from the model and a QLineEdit should show second column from the index
> > selected in the combo box. (I've also tried connecting
> > QComboBox::activated(int) -> QDataWidgetMapper::setCurrentIndex(int) to
> > no avail).
> >
>
> Did you solve your problem? I've tried several variations, but the only one
> that did help was putting your data into a QStandardItemModel.
Yes, sorry for not getting back here. The main error was in data(). It
did not correctly return data when role was EditRole (which is what
QDataWidgetMapper asks for).
> Things I tried:
> - subclassing QAbstractTableModel instead of QAbstractItemModel, because your
> model isn't hierarchical
Yeah, I guess this makes more sense. Some of the functions in my model
can be eliminated then.
> - making column 1 of the model editable
Did you do that by returning ItemIsEditable from flags()?
> What does the QDataWidgetMapper expect from a model?
Nothing more than it being correct :)
I used the modeltest.py from contrib to fix some things in my model (but
it had no way of detecting my error in data()).
Thanks for looking into this. Attaching a corrected model.
--
daniel
from PyQt4 import QtGui, QtCore
words = [
{'name' : 'day',
'opposite' : 'night'
},
{'name' : 'sunny',
'opposite' : 'rainy'
}
]
class MyModel(QtCore.QAbstractItemModel):
def __init__(self, parent = None):
QtCore.QAbstractItemModel.__init__(self, parent)
self.cache = {}
def index(self, row, column, parent = None):
if row < 0 or column < 0 or row >= self.rowCount(parent) or column >= self.columnCount(parent):
return QtCore.QModelIndex()
return QtCore.QAbstractItemModel.createIndex(self, row, column);
def parent(self, index):
return QtCore.QModelIndex()
def rowCount(self, parent):
if not parent.isValid():
return len(words)
else:
return 0
def columnCount(self, parent):
return 2
def data(self, index, role):
if index.isValid() == 0:
return QtCore.QVariant();
if index.column() > 1:
return QtCore.QVariant();
if index.row() > len(words) - 1:
return QtCore.QVariant();
if role == QtCore.Qt.DisplayRole or role == QtCore.Qt.EditRole:
if index.column() == 0:
return QtCore.QVariant(words[index.row()]['name'])
else:
return QtCore.QVariant(words[index.row()]['opposite'])
else:
return QtCore.QVariant()
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