Q3DScatter is too small in QWidget

horseface

Hi all, I am trying to create a Q3DScatter class that I can use in Qt Designer by promoting a QGraphicalView widget.
While I can display something, the size of the Q3DScatter is always very small.
Below is the example code I use to demo the problem:

This is the class I will promote my GraphicalView widget to:

#include <QtDataVisualization/q3dscatter.h>
#include <QtDataVisualization/qabstract3dseries.h>
#include <QtDataVisualization/q3dscatter.h>
#include <QtWidgets/QWidget>
#include <QtGui/QScreen>
#include <QtGui/QSurfaceFormat>
using namespace QtDataVisualization;
class Graph3d: public QWidget
{
private:

    Q3DScatter *scatter;
    QScatter3DSeries *series;
    QWindow *window;
public:
    Graph3d(QWidget *parent);
    ~Graph3d();
    
};

Graph3d::Graph3d(QWidget *parent)
{
    this->setParent(parent);
    this->scatter = new Q3DScatter();
    
    this->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    this->setFocusPolicy(Qt::StrongFocus);

    this->scatter->setMinimumSize(QSize(1000,1000));
    
    this->createWindowContainer(this->scatter,this);
    scatter->setFlags(scatter->flags() ^ Qt::FramelessWindowHint);
    this->series = new QScatter3DSeries;
    QScatterDataArray data;
    data << QVector3D(0.5f, 0.5f, 0.5f) << QVector3D(-0.3f, -0.5f, -0.4f) << QVector3D(0.0f, -0.3f, 0.2f)
    << QVector3D(1.5f, 0.5f, 0.5f) << QVector3D(-1.3f, -0.5f, -0.4f) << QVector3D(1.0f, -1.3f, 1.2f)
    << QVector3D(0.5f, 0.5f, 4.5f) << QVector3D(-0.3f, -3.5f, -0.4f) << QVector3D(0.0f, -0.3f, 2.2f)
    << QVector3D(0.5f, 0.5f, 5.5f) << QVector3D(-3.3f, -0.5f, -0.4f) << QVector3D(0.0f, -3.3f, 0.2f)
    << QVector3D(1.5f, 10.5f, 0.5f) << QVector3D(-5.3f, -0.5f, -0.4f) << QVector3D(4.0f, -0.3f, 0.2f);
    this->series->dataProxy()->addItems(data);
    scatter->addSeries(series);
    
}

Graph3d::~Graph3d()
{
}

And here is the main

#include <QtWidgets/QApplication>
#include <QtDataVisualization/q3dscatter.h>
#include <QtDataVisualization/qabstract3dseries.h>
#include <QtDataVisualization/q3dscatter.h>
#include <QtWidgets/QWidget>

using namespace QtDataVisualization;
#include "Graph3d.h"
#include <QtWidgets/QHBoxLayout>
int main(int argc, char **argv)
{
    QApplication app(argc,argv);
    QWidget *widget = new QWidget();
    QHBoxLayout *layout = new QHBoxLayout(widget);
    Graph3d *graph_3d = new Graph3d(widget);
    layout->addWidget(graph_3d);

    widget->setMinimumSize(QSize(1000,1000));

    widget->show();


    return app.exec();
}

No matter where I set the size, it does not affect the size of the scatter plot. What did I do wrong?

horseface

After few days of trying, I realized

this->createWindowContainer(this->scatter,this);

the return QWidget* will not be assigned to the base class, thus, not the correct method.
Perhaps it will be much easier to directly add the 3D scatter to a widget instead of promoting QGraphicalView.