Right. Thanks for pointing out that I still need to explicitly pass
"self."
I'm still not getting checkboxes displayed in the tree widget,
though. I believe the problem is in the nested return value in the
model's data() method.
The C++ example code I'm following uses a QMap data structure to hold
checkState values. After reading Assistant notes, a python
dir(QtCore), and some googling, I've found that QMap is not
implemented in PyQt. So I'm using a Dict instead. Still, my app
complains:
TypeError: invalid result type from DirModel.data()
Here's the C++ code I'm following:
virtual QVariant data(const QModelIndex &index, int role =
Qt::DisplayRole) const
{
if (role == Qt::CheckStateRole && index.column() == 0) {
return
checkstates.value(fileInfo(index).absoluteFilePath(), Qt::Unchecked);
}
return QDirModel::data(index, role);
}
private:
QMap<QString, Qt::CheckState> checkstates;
};
Here's my code:
class DirModel(QtGui.QDirModel):
def __init__(self, parent=None):
QtGui.QDirModel.__init__(self, parent)
self.checkstates = {}
def data(self, index, role=QtCore.Qt.DisplayRole):
if (role == QtCore.Qt.CheckStateRole and index.column() == 0):
self.checkstates[self.fileInfo(index).absoluteFilePath()] =
QtCore.Qt.Checked
return self.checkstates[self.fileInfo(index).absoluteFilePath()]
# <-- problem???
return QtGui.QDirModel.data(self, index, role)
Thanks in advance for your suggestions!
Scott
On Jul 9, 2008, at 11:36 PM, Phil Thompson wrote:
On Wed, 9 Jul 2008 22:39:27 -0700, Scott Frankel <[EMAIL PROTECTED]
>
wrote:
Hello,
I just joined this list and am new to PyQt (and Qt). I've scanned
the
archives, but I'm not sure even what I'm looking for to answer my
question.
I'm looking over some C++ code, trying to rewrite it in Python. (My
Spanish is much better than my C++!) I'm sub-classing and extending
QDirModel and getting the following error:
TypeError: first argument of unbound method QDirModel.data() must be
a QDirModel instance
The C++ methods are:
virtual QVariant data(const QModelIndex &index, int role =
Qt::DisplayRole) const
{
if (role == Qt::CheckStateRole && index.column() == 0) {
return
checkstates.value(fileInfo(index).absoluteFilePath(), Qt::Unchecked);
}
return QDirModel::data(index, role);
}
My translation so far looks like this:
[ ... ]
class DirModel(QtGui.QDirModel):
def data(self, index, role=QtCore.Qt.DisplayRole):
if (role == QtCore.Qt.CheckStateRole and index.column() == 0):
return
checkstates.value(fileInfo(index).absoluteFilePath(),
QtCore.Qt.Unchecked)
return QtGui.QDirModel.data(index, role)
[ ... ]
Not sure how to make the first argument (index or self?) be a
QDirModel instance. Ultimately I'm hoping for a directory tree with
check boxes.
Suggestions?
When using an unbound method (including __init__()) you must
explicitly
pass self. So...
return QtGui.QDirModel.data(self, index, role)
Phil
Scott Frankel
President/VFX Supervisor
Circle-S Studios
510-339-7477 (o)
510-332-2990 (c)
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