QTreeView and StylingSheets for QTreeView

**Nfrancisj** · 12th July 2016, 05:30

Well...no joy! I tried QVariant, but still didn't change the header. When you have a free moment, would you mind trying to create a qFileSystemModel, and try to change the header please? Just wondering if setHeaderData() actually works on a Qfilesystemmodel, or if I'm doing something wrong somewhere. Wondering if the default headers are even editable.

deriving from QFileSystemModel and reimplementing headerData()

Can you explain this a bit more please? How do I reimplement headerData() ? Do you mean subClass QFileSystemModel? Or create a QstandardItemModel and copy the info from my QFileSystemModel? is that possible?

Thanks!
Cheers!

**anda_skoa** · 12th July 2016, 10:11

Originally Posted by Nfrancisj

Just wondering if setHeaderData() actually works on a Qfilesystemmodel, or if I'm doing something wrong somewhere. Wondering if the default headers are even editable.

Could very likely be the case that these are not modifyable.
Hence the suggestion to overwrite headerData().

Originally Posted by Nfrancisj

Can you explain this a bit more please? How do I reimplement headerData() ? Do you mean subClass QFileSystemModel?

Yes.
Derive from (create a subclass of) the model class, then provide your own headerData() method.

Cheers,
_

**ChrisW67** · 12th July 2016, 11:46

QFileSystemModel::headerData() is hard coded to return translated versions of "Name", "Size", "Type" or "Kind" and there is no implementation of setHeaderData(). You could use a simple subclass of QFileSystemModel. Something like:

Qt Code:

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#!/usr/bin/python
# -*- coding: utf-8 -*-
 
import sys
from PyQt4 import QtGui, QtCore
 
class FileSystemModel(QtGui.QFileSystemModel):
    def __init__(self):
        QtGui.QFileSystemModel.__init__(self)
 
    def headerData(self, section, orientation, role):
        if orientation == QtCore.Qt.Horizontal and role == QtCore.Qt.DisplayRole:
            if section == 0:
                result = self.tr('Foo')
            elif section == 1:
                result = self.tr('Bar')
            elif section == 2:
                result = self.tr('Baz')
            elif section == 3:
                result = self.tr('Bob')
            else:
                result = QtCore.QVariant()
        else:
            result = super(QtGui.QFileSystemModel, self).headerData(section, orientation, role)
        return result
 
 
def main():
 
    app = QtGui.QApplication(sys.argv)
 
    m = FileSystemModel()
    m.setRootPath('/')
 
    w = QtGui.QTreeView()
    w.setModel(m);
    w.resize(640, 480)
    w.move(300, 300)
    w.setWindowTitle('Simple')
    w.show()
 
    sys.exit(app.exec_())
 
 
if __name__ == '__main__':
    main()

#!/usr/bin/python
# -*- coding: utf-8 -*-

import sys
from PyQt4 import QtGui, QtCore

class FileSystemModel(QtGui.QFileSystemModel):
    def __init__(self):
        QtGui.QFileSystemModel.__init__(self)

    def headerData(self, section, orientation, role):
        if orientation == QtCore.Qt.Horizontal and role == QtCore.Qt.DisplayRole:
            if section == 0:
                result = self.tr('Foo')
            elif section == 1:
                result = self.tr('Bar')
            elif section == 2:
                result = self.tr('Baz')
            elif section == 3:
                result = self.tr('Bob')
            else:
                result = QtCore.QVariant()
        else:
            result = super(QtGui.QFileSystemModel, self).headerData(section, orientation, role)
        return result


def main():

    app = QtGui.QApplication(sys.argv)

    m = FileSystemModel()
    m.setRootPath('/')

    w = QtGui.QTreeView()
    w.setModel(m);
    w.resize(640, 480)
    w.move(300, 300)
    w.setWindowTitle('Simple')
    w.show()

    sys.exit(app.exec_())


if __name__ == '__main__':
    main()

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**Nfrancisj** · 14th July 2016, 02:53

Instead of messing with the QFileSystemModel, I'd like to try and copy the data from it and transfer it to a QStandardItemModel.
How do I do that? I saw on stackoverflow, there's a method "clone", but i cant seem to find it.

I'm hoping there's a fancy Q Class/Method that will easily transfer data.

.....but I'm guessing that I have to iterate through the model and add them based on the index, rows, and column.

Cheers!

**anda_skoa** · 14th July 2016, 10:47

Instead of making a small adjustment you want to create huge overhead in code and memory usage and manually synchronize between two models?

Cheers,
_

**Nfrancisj** · 14th July 2016, 16:32

Well, I'm not really writing anything for production. This is all just to learn how things work, and what's possible.

I already know how to subclass, just trying to figure out Models.

btw, for other newbies who are following, great explanation on models here:
http://youtu.be/T0HXWcpPItk

**anda_skoa** · 14th July 2016, 17:27

ok, but in any real application you would go for either the subclass or a proxy model, never for duplicating data and keeping in manually synchronized.

Cheers,
_