Qt 5.7 | Qt Data Visualization | Scatter Example | main.cpp Example File

Qt 5.7.1 Reference Documentation

# main.cpp Example File

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.
      **
      ** $QT_BEGIN_LICENSE:GPL$
      ** Commercial License Usage
      ** Licensees holding valid commercial Qt licenses may use this file in
      ** accordance with the commercial license agreement provided with the
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      ** information use the contact form at https://www.qt.io/contact-us.
      **
      ** GNU General Public License Usage
      ** Alternatively, this file may be used under the terms of the GNU
      ** General Public License version 3 or (at your option) any later version
      ** approved by the KDE Free Qt Foundation. The licenses are as published by
      ** the Free Software Foundation and appearing in the file LICENSE.GPL3
      ** included in the packaging of this file. Please review the following
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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();
      }