Scatter Example

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 #include "scatterdatamodifier.h"

 #include <QtWidgets/QApplication>
 #include <QtWidgets/QWidget>
 #include <QtWidgets/QHBoxLayout>
 #include <QtWidgets/QVBoxLayout>
 #include <QtWidgets/QPushButton>
 #include <QtWidgets/QCheckBox>
 #include <QtWidgets/QComboBox>
 #include <QtWidgets/QFontComboBox>
 #include <QtWidgets/QLabel>
 #include <QtWidgets/QMessageBox>
 #include <QtGui/QScreen>
 #include <QtGui/QFontDatabase>

 int main(int argc, char **argv)
 {
     QApplication app(argc, argv);
     Q3DScatter *graph = new Q3DScatter();
     QWidget *container = QWidget::createWindowContainer(graph);

     if (!graph->hasContext()) {
         QMessageBox msgBox;
         msgBox.setText("Couldn't initialize the OpenGL context.");
         msgBox.exec();
         return -1;
     }

     QSize screenSize = graph->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);

     QWidget *widget = new QWidget;
     QHBoxLayout *hLayout = new QHBoxLayout(widget);
     QVBoxLayout *vLayout = new QVBoxLayout();
     hLayout->addWidget(container, 1);
     hLayout->addLayout(vLayout);

     widget->setWindowTitle(QStringLiteral("A Cosine Wave"));

     QComboBox *themeList = new QComboBox(widget);
     themeList->addItem(QStringLiteral("Qt"));
     themeList->addItem(QStringLiteral("Primary Colors"));
     themeList->addItem(QStringLiteral("Digia"));
     themeList->addItem(QStringLiteral("Stone Moss"));
     themeList->addItem(QStringLiteral("Army Blue"));
     themeList->addItem(QStringLiteral("Retro"));
     themeList->addItem(QStringLiteral("Ebony"));
     themeList->addItem(QStringLiteral("Isabelle"));
     themeList->setCurrentIndex(6);

     QPushButton *labelButton = new QPushButton(widget);
     labelButton->setText(QStringLiteral("Change label style"));

     QCheckBox *smoothCheckBox = new QCheckBox(widget);
     smoothCheckBox->setText(QStringLiteral("Smooth dots"));
     smoothCheckBox->setChecked(true);

     QComboBox *itemStyleList = new QComboBox(widget);
     itemStyleList->addItem(QStringLiteral("Sphere"), int(QAbstract3DSeries::MeshSphere));
     itemStyleList->addItem(QStringLiteral("Cube"), int(QAbstract3DSeries::MeshCube));
     itemStyleList->addItem(QStringLiteral("Minimal"), int(QAbstract3DSeries::MeshMinimal));
     itemStyleList->addItem(QStringLiteral("Point"), int(QAbstract3DSeries::MeshPoint));
     itemStyleList->setCurrentIndex(0);

     QPushButton *cameraButton = new QPushButton(widget);
     cameraButton->setText(QStringLiteral("Change camera preset"));

     QPushButton *itemCountButton = new QPushButton(widget);
     itemCountButton->setText(QStringLiteral("Toggle item count"));

     QCheckBox *backgroundCheckBox = new QCheckBox(widget);
     backgroundCheckBox->setText(QStringLiteral("Show background"));
     backgroundCheckBox->setChecked(true);

     QCheckBox *gridCheckBox = new QCheckBox(widget);
     gridCheckBox->setText(QStringLiteral("Show grid"));
     gridCheckBox->setChecked(true);

     QComboBox *shadowQuality = new QComboBox(widget);
     shadowQuality->addItem(QStringLiteral("None"));
     shadowQuality->addItem(QStringLiteral("Low"));
     shadowQuality->addItem(QStringLiteral("Medium"));
     shadowQuality->addItem(QStringLiteral("High"));
     shadowQuality->addItem(QStringLiteral("Low Soft"));
     shadowQuality->addItem(QStringLiteral("Medium Soft"));
     shadowQuality->addItem(QStringLiteral("High Soft"));
     shadowQuality->setCurrentIndex(4);

     QFontComboBox *fontList = new QFontComboBox(widget);
     fontList->setCurrentFont(QFont("Arial"));

     vLayout->addWidget(labelButton, 0, Qt::AlignTop);
     vLayout->addWidget(cameraButton, 0, Qt::AlignTop);
     vLayout->addWidget(itemCountButton, 0, Qt::AlignTop);
     vLayout->addWidget(backgroundCheckBox);
     vLayout->addWidget(gridCheckBox);
     vLayout->addWidget(smoothCheckBox, 0, Qt::AlignTop);
     vLayout->addWidget(new QLabel(QStringLiteral("Change dot style")));
     vLayout->addWidget(itemStyleList);
     vLayout->addWidget(new QLabel(QStringLiteral("Change theme")));
     vLayout->addWidget(themeList);
     vLayout->addWidget(new QLabel(QStringLiteral("Adjust shadow quality")));
     vLayout->addWidget(shadowQuality);
     vLayout->addWidget(new QLabel(QStringLiteral("Change font")));
     vLayout->addWidget(fontList, 1, Qt::AlignTop);

     ScatterDataModifier *modifier = new ScatterDataModifier(graph);

     QObject::connect(cameraButton, &QPushButton::clicked, modifier,
                      &ScatterDataModifier::changePresetCamera);
     QObject::connect(labelButton, &QPushButton::clicked, modifier,
                      &ScatterDataModifier::changeLabelStyle);
     QObject::connect(itemCountButton, &QPushButton::clicked, modifier,
                      &ScatterDataModifier::toggleItemCount);

     QObject::connect(backgroundCheckBox, &QCheckBox::stateChanged, modifier,
                      &ScatterDataModifier::setBackgroundEnabled);
     QObject::connect(gridCheckBox, &QCheckBox::stateChanged, modifier,
                      &ScatterDataModifier::setGridEnabled);
     QObject::connect(smoothCheckBox, &QCheckBox::stateChanged, modifier,
                      &ScatterDataModifier::setSmoothDots);

     QObject::connect(modifier, &ScatterDataModifier::backgroundEnabledChanged,
                      backgroundCheckBox, &QCheckBox::setChecked);
     QObject::connect(modifier, &ScatterDataModifier::gridEnabledChanged,
                      gridCheckBox, &QCheckBox::setChecked);
     QObject::connect(itemStyleList, SIGNAL(currentIndexChanged(int)), modifier,
                      SLOT(changeStyle(int)));

     QObject::connect(themeList, SIGNAL(currentIndexChanged(int)), modifier,
                      SLOT(changeTheme(int)));

     QObject::connect(shadowQuality, SIGNAL(currentIndexChanged(int)), modifier,
                      SLOT(changeShadowQuality(int)));

     QObject::connect(modifier, &ScatterDataModifier::shadowQualityChanged, shadowQuality,
                      &QComboBox::setCurrentIndex);
     QObject::connect(graph, &Q3DScatter::shadowQualityChanged, modifier,
                      &ScatterDataModifier::shadowQualityUpdatedByVisual);

     QObject::connect(fontList, &QFontComboBox::currentFontChanged, modifier,
                      &ScatterDataModifier::changeFont);

     QObject::connect(modifier, &ScatterDataModifier::fontChanged, fontList,
                      &QFontComboBox::setCurrentFont);

     widget->show();
     return app.exec();
 }