qt-everywhere-src-5.15.1/qtdatavis3d/examples/datavisualization/scatter/main.cpp

/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Data Visualization module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL$
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** the Free Software Foundation and appearing in the file LICENSE.GPL3
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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)
{
    //! [0]
    QApplication app(argc, argv);
    Q3DScatter *graph = new Q3DScatter();
    QWidget *container = QWidget::createWindowContainer(graph);
    //! [0]

    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);

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

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

    //! [4]
    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"));
    //! [4]

    //! [5]
    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);
    //! [5]

    //! [2]
    ScatterDataModifier *modifier = new ScatterDataModifier(graph);
    //! [2]

    //! [6]
    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);
    //! [6]

    //! [3]
    widget->show();
    return app.exec();
    //! [3]
}