[SOLVED] Populate a QML ListView with a custom C++ model

? Offline

Hi,

I have a custom Model representing a tree based on this example:
http://qt-project.org/doc/qt-5/qtwidgets-itemviews-simpletreemodel-example.html

My internal model is correctly populated and I can manually output it to console to check that it works perfectly.

In the QML, I do something like:
@ ListView
{
id: sceneGraphView
anchors.fill: parent

model: sceneGraphModel
delegate: sceneNodeDelegate

}@

Unfortunately, I only get the first element of my model. Is this the correct way to populate a ListView?

Also, the model's methods called when I launch the application are:
@rowCount
roleNames
index
rowCount
columnCount
data @

Thanks for any help.

p3c0

Hi,

Are you calling "beginInsertRows":https://qt-project.org/doc/qt-5.1/qtcore/qabstractitemmodel.html#beginInsertRows and "endInsertRows":https://qt-project.org/doc/qt-5.1/qtcore/qabstractitemmodel.html#endInsertRows when populating the list ?
See "this":https://qt-project.org/doc/qt-5.1/qtquick/qtquick-modelviewsdata-cppmodels.html example for how to use C++ model in QML

? Offline

Thanks for your answer.

The model is already populated when the view access it the first time calling rowCount.

My main concern is about the C++ model members called from the QML ListView. I am not sure it is correct and sufficient.

Best regards.

? Offline

Ok, it seems that the QML View I use is not appropriate for that. When testing with a QTreeView, it worked immediately. What QML view should I use then to display a Tree in QML? it seems that none are present for the moment.

Thanks for any help.

p3c0

Hi,

Currently there's no of Treeview for QML. But there are some work around's
For eg. See "this":http://qt-project.org/forums/viewthread/30521/#136940

? Offline

Ok, I see. Thanks a lot for your help!