我正在使用QtDataVisualization设置单点的3d图。
到目前为止,使用相应的Q3DScatter可以在Qt示例中记录的方式起作用:

QGuiApplication app(argc, argv);

Q3DScatter scatter;
scatter.setFlags(scatter.flags() ^ Qt::FramelessWindowHint);

QScatter3DSeries *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);
series->dataProxy()->addItems(data);
scatter.addSeries(series);

scatter.show();
return app.exec();

当我通过在该图周围包装QWidget进行修改时,该图未显示。小部件显示为空(灰色)。
QGuiApplication app(argc, argv);

Q3DScatter scatter;
scatter.setFlags(scatter.flags() ^ Qt::FramelessWindowHint);

QWidget *container = QWidget::createWindowContainer(scatter);
QSize screenSize = scatter->screen()->size();
container->setMinimumSize(QSize(screenSize.width() / 2, screenSize.height() / 1.5));
container->setMaximumSize(screenSize);
container->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
container->setFocusPolicy(Qt::StrongFocus);

QScatter3DSeries *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);
series->dataProxy()->addItems(data);
scatter.addSeries(series);

container->show();
return app.exec();

我的代码有问题吗?

最佳答案

QGuiApplication中,“对于基于QWidget的Qt应用程序,请改用QApplication,因为它提供了创建QWidget实例所需的某些功能”。然后可以执行以下操作:

    //    QGuiApplication app(argc, argv);
    QApplication app(argc, argv);
    QMainWindow w;

    Q3DScatter scatter;
    scatter.setFlags(scatter.flags() ^ Qt::FramelessWindowHint);

    QWidget *container = QWidget::createWindowContainer(&scatter);
    w.setCentralWidget(container);

    QSize screenSize = scatter.screen()->size();
    container->setMinimumSize(QSize(screenSize.width() / 2, screenSize.height() / 1.5));
    container->setMaximumSize(screenSize);
    container->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    container->setFocusPolicy(Qt::StrongFocus);

    QScatter3DSeries *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);
    series->dataProxy()->addItems(data);
    scatter.addSeries(series);

//    container->show();
    w.show();

    return app.exec();

10-07 19:25
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