On Saturday 20 November 2010 14:30:19 Thomas Perl wrote: > Hi! Hi, I did a example to show, test and learn how to export a QAbstractItemModel do QML, including user defined roles and... it works! :-D
The example is attached, I'll upload it to git soon.
> I'm trying to display a list of arbitrary Python objects inside a QML
> ListView where I can leave the representation of each Python object to
> the delegate. Ideally (ignoring all wrapping in QObjects with slots,
> properties, etc..), I'd like to do something along those lines:
>
> class Person:
> def __init__(self, id, name):
> self.id = id
> self.name = name
>
> # Imagine this is properly wrapped as slot in a QObject
> def person_selected(p):
> print 'user clicked on person:', p.name, 'with id:', p.id
>
> persons = [
> Person(1, 'AA'),
> Person(2, 'BB'),
> Person(3, 'CC')
> ]
>
> # ... create QDeclarativeView ...
> # ... get root context as "ctx" ...
>
> ctx.setContextProperty('persons', persons)
> ctx.setContextProperty('person_selected', person_selected)
>
> In my QML file, I then want to set "persons" as the model for my
> ListView, and set up the mouse handler in the delegate to call
> person_selected() with the person that has been clicked. In the
> delegate, I want to access the attributes of Person (e.g. p.name), and
> (thinking about future uses), I might also use methods of it (e.g.
> p.formatBirthday()) as well, not just attributes.
>
> In the pyside-examples repository, I've only found a simple example
> that deals with a list of strings (in
> examples/declarative/scrolling.py), which works and is nice, but does
> not really map to my real-world use case where I want to display a
> list of items that have different properties and where I also want to
> retrieve the original item in a "item selected" callback.
>
> Trying to come up with something as described above does not give me
> any results. I have tried playing around with QAbstractListModel as
> alternative already, which resulted in
> http://bugs.openbossa.org/show_bug.cgi?id=477.
>
> Any pointers and suggestions on how to best create such a selection
> list of Python objects is greatly appreciated!
>
> Thanks!
> Thomas
> _______________________________________________
> PySide mailing list
> [email protected]
> http://lists.openbossa.org/listinfo/pyside
--
Hugo Parente Lima
INdT - Instituto Nokia de Tecnologia
--
Hugo Parente Lima
INdT - Instituto Nokia de Tecnologia
/**************************************************************************** ** ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). ** All rights reserved. ** Contact: Nokia Corporation ([email protected]) ** ** This file is part of the QtDeclarative module of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** You may use this file under the terms of the BSD license as follows: ** ** "Redistribution and use in source and binary forms, with or without ** modification, are permitted provided that the following conditions are ** met: ** * Redistributions of source code must retain the above copyright ** notice, this list of conditions and the following disclaimer. ** * Redistributions in binary form must reproduce the above copyright ** notice, this list of conditions and the following disclaimer in ** the documentation and/or other materials provided with the ** distribution. ** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor ** the names of its contributors may be used to endorse or promote ** products derived from this software without specific prior written ** permission. ** ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ** $QT_END_LICENSE$ ** ****************************************************************************/ import Qt 4.7 ListView { width: 100 height: 100 anchors.fill: parent model: myModel delegate: Component { Rectangle { height: 25 width: 100 Text { text: modelData } } } }
import sys
from PySide.QtCore import *
from PySide.QtGui import *
from PySide.QtDeclarative import *
class PersonModel (QAbstractListModel):
MyRole = Qt.UserRole + 1
def __init__(self, parent = None):
QAbstractListModel.__init__(self, parent)
self.setRoleNames({
PersonModel.MyRole : 'modelData',
Qt.DisplayRole : 'display' # Qt asserts if you don't define a display role
})
self._data = []
def rowCount(self, index):
return len(self._data)
def data(self, index, role):
d = self._data[index.row()]
if role == Qt.DisplayRole:
return d['name']
elif role == Qt.DecorationRole:
return Qt.black
elif role == PersonModel.MyRole:
return d['myrole']
return None
def populate(self):
self._data.append({'name':'Qt', 'myrole':'role1'})
self._data.append({'name':'PySide', 'myrole':'role2'})
if __name__ == '__main__':
app = QApplication(sys.argv)
view = QDeclarativeView()
myModel = PersonModel()
myModel.populate()
view.rootContext().setContextProperty("myModel", myModel)
view.setSource('view.qml')
view.show()
app.exec_()
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