[SOLVED] update an item of qabstractlistmodel

[samidarko]

Hi,
I implemented qabstractlistmodel today following this documentation:
http://doc.qt.io/qt-5/qtquick-modelviewsdata-cppmodels.html

1. I don't get how to update one specific item of the list. I can access to the item by model index but I don't have any setter and I don't find any example, do anybody knows a doc explaining this?
   More specifically, I can access in QML to my Animal object like this:

• model[index].size
• model[index].size = 5 // this what I want to do

2. I usually use Class inheriting from QObject but I can't do that with qabstractlistmodel, is it still possible to set properties Q_PROPERTY in Animal?

Thanks by advance for your help

[Buttink]

@samidarko You could implement https://doc-snapshots.qt.io/qt5-5.4/qabstractitemmodel.html#setData or just change the value of your data and then just call the signal yourself.

[samidarko]

@Buttink Thanks, next time I'll read the doc more thoroughly ;-)
For my second question, do you think it is possible?

[Buttink]

@samidarko So for me, I use QObjects in my model with Q_PROPERTYs which means that If i change the same instance that the QmlEngine has then the notify signal will be fired for my property and Qml will reevaluate the binding. So for me I almost never check updates I only check when an Item is deleted or added to my model. Does that help?

[SGaist]

Hi and welcome to devnet,

QabstractListModel is a QObject so you can derive from it like you want. Put the macro when using e.g. signals and slots and you should be good to go.

[samidarko]

@Buttink what is bothering me with qabstractlistmodel, are the items/rows contained in the list. Many times I pass this Item in a detail page and I find very practical to have a QObject. I was thinking of using this:
https://qt.gitorious.org/qt-labs/qml-object-model
but the last commit is 2011...

[samidarko]

@SGaist Thanks, that's interesting but I want to use Q_PROPERTY in the Item/row of the list e.g. Animal (cf. Qt doc example) which are not QObject cause, in my case, the rows are "links" and I use StackView to push a new view with the current item as an argument.

[SGaist]

Ok, I understand your goal better

Just give it a run, it's not because it's old that it's outdated ;)

[samidarko]

Finally I gave a shot to https://qt.gitorious.org/qt-labs/qml-object-model
It works fine, just needed to reimplement setRoleNames (deprecated in qt5)
Thanks again to the community :D