Organize/Align multiple QGraphicsItems in a Layout? QGraphicsScene

[StudentScripter]

I know that somehow its needed to create a QGraphicsLinearLayout and inherit with my QGraphicsItem subclass from QGraphicsLayoutItem too. But somehow it doesn't looks like there is a layout created at all. I still can freely move my graphicsitems in the scene even when beeing added to the layout:

CustomGraphicsScene::CustomGraphicsScene(QObject *parent)
    : QGraphicsScene(parent)
{   
 // Create a layout and a widget to hold the items
    layout = new QGraphicsLinearLayout(Qt::Vertical);
    QGraphicsWidget *widget = new QGraphicsWidget;
    widget->setLayout(layout);
    addItem(widget);  
}



void CustomGraphicsScene::dropEvent(QGraphicsSceneDragDropEvent *event)
{
    if(event->mimeData()->property("Key").canConvert(QMetaType(QMetaType::Int))){

        int key = event->mimeData()->property("Key").toInt();
        
        switch(key){
        
            case 10: {
            clearSelection();
            ResizablePixmapItem * pixItem = new ResizablePixmapItem(QPixmap(":/resource/quick.png"));
            pixItem->setRect(0,0,100,100);
            pixItem->setFlags(QGraphicsItem::ItemIsMovable | QGraphicsItem::ItemIsSelectable | QGraphicsItem::ItemSendsScenePositionChanges);
            addItem(pixItem);
            pixItem->setPos(event->scenePos() - QPointF(pixItem->boundingRect().width()/2, pixItem->boundingRect().height()/2));
            pixItem->setSelected(true);
            
            layout->addItem(pixItem);
            



            //Erhöht den Counter für jedes gedroppete Item
            SceneItemCounter++;
            pixItem->setSceneID(SceneItemCounter);
            qDebug() << "SceneID: " << pixItem->getSceneID();
            
           
            emit SendNewItemWasAddedtoScene(pixItem);
            emit SendItemsInSceneSelected();  
            }
            break;

Does anyone know how to do it properly? My goal is to control the aligment and position of all qgraphicsitems within the layout.

[Pl45m4]

@StudentScripter

Have you checked the QGraphicsLayout example already?

• https://doc.qt.io/qt-6/qtwidgets-graphicsview-basicgraphicslayouts-example.html