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Starting App from other class

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  • jsulmJ jsulm

    @HenrikSt-0 You can simply integrate this code in your app.

    ? Offline
    ? Offline
    A Former User
    wrote on last edited by
    #4

    @jsulm I know, but how?

    jsulmJ 1 Reply Last reply
    0
    • ? A Former User

      @jsulm I know, but how?

      jsulmJ Offline
      jsulmJ Offline
      jsulm
      Lifetime Qt Champion
      wrote on last edited by
      #5

      @HenrikSt-0 Via copy/paste. Add new class GraphDataGenerator to your project and copy the code from example into it. Then copy the code from main in the example into your main...

      https://forum.qt.io/topic/113070/qt-code-of-conduct

      ? 1 Reply Last reply
      0
      • jsulmJ jsulm

        @HenrikSt-0 Via copy/paste. Add new class GraphDataGenerator to your project and copy the code from example into it. Then copy the code from main in the example into your main...

        ? Offline
        ? Offline
        A Former User
        wrote on last edited by
        #6

        @jsulm Oh sorry, I did not explained correctly...
        The code above is in a .cpp file.

        And the function, where I want to start the "application in the .cpp file" is

        void MainWindow::GraphicalDiagramm()
        {
            //Start application from .cpp file here...
         }
        

        Do you understand?

        jsulmJ 1 Reply Last reply
        0
        • ? A Former User

          @jsulm Oh sorry, I did not explained correctly...
          The code above is in a .cpp file.

          And the function, where I want to start the "application in the .cpp file" is

          void MainWindow::GraphicalDiagramm()
          {
              //Start application from .cpp file here...
           }
          

          Do you understand?

          jsulmJ Offline
          jsulmJ Offline
          jsulm
          Lifetime Qt Champion
          wrote on last edited by
          #7

          @HenrikSt-0 said in Starting App from other class:

          Do you understand?

          No, because I don't know what "Start application" means here. Usually that would mean to start an external executable in its own process. @SGaist already asked you about that.
          If you mean executing the code in MainWindow::GraphicalDiagramm() nothing stops you from putting the code from the main of that example (except the QApplication stuff ofcourse) into MainWindow::GraphicalDiagramm().

          https://forum.qt.io/topic/113070/qt-code-of-conduct

          1 Reply Last reply
          0
          • ? Offline
            ? Offline
            A Former User
            wrote on last edited by
            #8

            This is my function, and I copied the mainfunction into it:

            void MainWindow::GrafischesDiagramm()
            {
                //! [0]
               // QApplication app(argc, argv);
                Q3DBars *graph = new Q3DBars();
                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() / 2));
                container->setMaximumSize(screenSize);
                container->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
                container->setFocusPolicy(Qt::StrongFocus);
            
                //! [1]
                QWidget widget;
                QVBoxLayout *layout = new QVBoxLayout(&widget);
                QTableWidget *tableWidget = new QTableWidget(&widget);
                layout->addWidget(container, 1);
                layout->addWidget(tableWidget, 1, Qt::AlignHCenter);
                //! [1]
            
                tableWidget->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
                tableWidget->setAlternatingRowColors(true);
                widget.setWindowTitle(QStringLiteral("Hours spent on the Internet"));
            
                //! [2]
                // Since we are dealing with QTableWidget, the model will already have data sorted properly
                // into rows and columns, so we simply set useModelCategories property to true to utilize this.
                QItemModelBarDataProxy *proxy = new QItemModelBarDataProxy(tableWidget->model());
                proxy->setUseModelCategories(true);
                QBar3DSeries *series = new QBar3DSeries(proxy);
                series->setMesh(QAbstract3DSeries::MeshPyramid);
                graph->addSeries(series);
                //! [2]
            
                //! [3]
                GraphDataGenerator generator(graph, tableWidget);
                QObject::connect(series, &QBar3DSeries::selectedBarChanged, &generator,
                                 &GraphDataGenerator::selectFromTable);
                QObject::connect(tableWidget, &QTableWidget::currentCellChanged, &generator,
                                 &GraphDataGenerator::selectedFromTable);
                //! [3]
            
                //! [4]
                widget.show();
                generator.start();
                //return app.exec();
            }
            
            

            And this is outside of the mainwindow class:

            //Grafisches Diagramm
            #include <QtDataVisualization/q3dbars.h>
            #include <QtDataVisualization/qcategory3daxis.h>
            #include <QtDataVisualization/qitemmodelbardataproxy.h>
            #include <QtDataVisualization/qvalue3daxis.h>
            #include <QtDataVisualization/q3dscene.h>
            #include <QtDataVisualization/q3dcamera.h>
            #include <QtDataVisualization/qbar3dseries.h>
            #include <QtDataVisualization/q3dtheme.h>
            
            
            #include <QtWidgets/QApplication>
            #include <QtWidgets/QVBoxLayout>
            #include <QtWidgets/QTableWidget>
            #include <QtGui/QScreen>
            #include <QtCore/QRandomGenerator>
            #include <QtCore/QTimer>
            #include <QtGui/QFont>
            #include <QtCore/QDebug>
            #include <QtWidgets/QHeaderView>
            #include <QtWidgets/QMessageBox>
            
            #define USE_STATIC_DATA
            
            using namespace QtDataVisualization;
            
            class GraphDataGenerator : public QObject
            {
            public:
                explicit GraphDataGenerator(Q3DBars *bargraph, QTableWidget *tableWidget);
                ~GraphDataGenerator();
            
                void setupModel();
                void addRow();
                void changeStyle();
                void changePresetCamera();
                void changeTheme();
                void start();
                void selectFromTable(const QPoint &selection);
                void selectedFromTable(int currentRow, int currentColumn, int previousRow, int previousColumn);
                void fixTableSize();
            
            private:
                Q3DBars *m_graph;
                QTimer *m_dataTimer;
                int m_columnCount;
                int m_rowCount;
                QTableWidget *m_tableWidget; // not owned
            };
            
            GraphDataGenerator::GraphDataGenerator(Q3DBars *bargraph, QTableWidget *tableWidget)
                : m_graph(bargraph),
                  m_dataTimer(0),
                  m_columnCount(100),
                  m_rowCount(50),
                  m_tableWidget(tableWidget)
            {
                //! [5]
                // Set up bar specifications; make the bars as wide as they are deep,
                // and add a small space between them
                m_graph->setBarThickness(1.0f);
                m_graph->setBarSpacing(QSizeF(0.2, 0.2));
            
                //! [5]
            #ifndef USE_STATIC_DATA
                // Set up sample space; make it as deep as it's wide
                m_graph->rowAxis()->setRange(0, m_rowCount);
                m_graph->columnAxis()->setRange(0, m_columnCount);
                m_tableWidget->setColumnCount(m_columnCount);
            
                // Set selection mode to full
                m_graph->setSelectionMode(QAbstract3DGraph::SelectionItemRowAndColumn);
            
                // Hide axis labels by explicitly setting one empty string as label list
                m_graph->rowAxis()->setLabels(QStringList(QString()));
                m_graph->columnAxis()->setLabels(QStringList(QString()));
            
                m_graph->seriesList().at(0)->setItemLabelFormat(QStringLiteral("@valueLabel"));
            #else
                //! [6]
                // Set selection mode to slice row
                m_graph->setSelectionMode(QAbstract3DGraph::SelectionItemAndRow | QAbstract3DGraph::SelectionSlice);
            
                //! [6]
            #endif
            
                //! [7]
                // Set theme
                m_graph->activeTheme()->setType(Q3DTheme::ThemeDigia);
            
                // Set font
                m_graph->activeTheme()->setFont(QFont("Impact", 20));
            
                // Set preset camera position
                m_graph->scene()->activeCamera()->setCameraPreset(Q3DCamera::CameraPresetFront);
                //! [7]
            }
            
            GraphDataGenerator::~GraphDataGenerator()
            {
                if (m_dataTimer) {
                    m_dataTimer->stop();
                    delete m_dataTimer;
                }
                delete m_graph;
            }
            
            void GraphDataGenerator::start()
            {
            #ifndef USE_STATIC_DATA
                m_dataTimer = new QTimer();
                m_dataTimer->setTimerType(Qt::CoarseTimer);
                QObject::connect(m_dataTimer, &QTimer::timeout, this, &GraphDataGenerator::addRow);
                m_dataTimer->start(0);
                m_tableWidget->setFixedWidth(m_graph->width());
            #else
                //! [8]
                setupModel();
            
                // Table needs to be shown before the size of its headers can be accurately obtained,
                // so we postpone it a bit
                m_dataTimer = new QTimer();
                m_dataTimer->setSingleShot(true);
                QObject::connect(m_dataTimer, &QTimer::timeout, this, &GraphDataGenerator::fixTableSize);
                m_dataTimer->start(0);
                //! [8]
            #endif
            }
            
            void GraphDataGenerator::setupModel()
            {
                //! [9]
                // Set up row and column names
                QStringList days;
                days << "Monday" << "Tuesday" << "Wednesday" << "Thursday" << "Friday" << "Saturday" << "Sunday";
                QStringList weeks;
                weeks << "week 1" << "week 2" << "week 3" << "week 4" << "week 5";
            
                // Set up data         Mon  Tue  Wed  Thu  Fri  Sat  Sun
                float hours[5][7] = {{2.0f, 1.0f, 3.0f, 0.2f, 1.0f, 5.0f, 10.0f},     // week 1
                                     {0.5f, 1.0f, 3.0f, 1.0f, 2.0f, 2.0f, 3.0f},      // week 2
                                     {1.0f, 1.0f, 2.0f, 1.0f, 4.0f, 4.0f, 4.0f},      // week 3
                                     {0.0f, 1.0f, 0.0f, 0.0f, 2.0f, 2.0f, 0.3f},      // week 4
                                     {3.0f, 3.0f, 6.0f, 2.0f, 2.0f, 1.0f, 1.0f}};     // week 5
                //! [9]
            
                // Add labels
                //! [10]
                m_graph->rowAxis()->setTitle("Week of year");
                m_graph->rowAxis()->setTitleVisible(true);
                m_graph->columnAxis()->setTitle("Day of week");
                m_graph->columnAxis()->setTitleVisible(true);
                m_graph->valueAxis()->setTitle("Hours spent on the Internet");
                m_graph->valueAxis()->setTitleVisible(true);
                m_graph->valueAxis()->setLabelFormat("%.1f h");
                //! [10]
            
                //! [11]
                m_tableWidget->setRowCount(5);
                m_tableWidget->setColumnCount(7);
                m_tableWidget->setHorizontalHeaderLabels(days);
                m_tableWidget->setVerticalHeaderLabels(weeks);
                m_tableWidget->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
                m_tableWidget->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
                m_tableWidget->setCurrentCell(-1, -1);
                m_tableWidget->setSelectionMode(QAbstractItemView::SingleSelection);
                //! [11]
            
                //! [12]
                for (int week = 0; week < weeks.size(); week++) {
                    for (int day = 0; day < days.size(); day++) {
                        QModelIndex index = m_tableWidget->model()->index(week, day);
                        m_tableWidget->model()->setData(index, hours[week][day]);
                    }
                }
                //! [12]
            }
            
            void GraphDataGenerator::addRow()
            {
                m_tableWidget->model()->insertRow(0);
                if (m_tableWidget->model()->rowCount() > m_rowCount)
                    m_tableWidget->model()->removeRow(m_rowCount);
                for (int i = 0; i < m_columnCount; i++) {
                    QModelIndex index = m_tableWidget->model()->index(0, i);
                    m_tableWidget->model()->setData(index,
                        ((float)i / (float)m_columnCount) / 2.0f +
                                                    (float)(QRandomGenerator::global()->bounded(30)) / 100.0f);
                }
                m_tableWidget->resizeColumnsToContents();
            }
            
            //! [13]
            void GraphDataGenerator::selectFromTable(const QPoint &selection)
            {
                m_tableWidget->setFocus();
                m_tableWidget->setCurrentCell(selection.x(), selection.y());
            }
            //! [13]
            
            //! [14]
            void GraphDataGenerator::selectedFromTable(int currentRow, int currentColumn,
                                                       int previousRow, int previousColumn)
            {
                Q_UNUSED(previousRow)
                Q_UNUSED(previousColumn)
                m_graph->seriesList().at(0)->setSelectedBar(QPoint(currentRow, currentColumn));
            }
            //! [14]
            
            void GraphDataGenerator::fixTableSize()
            {
                int width = m_tableWidget->horizontalHeader()->length();
                width += m_tableWidget->verticalHeader()->width();
                m_tableWidget->setFixedWidth(width + 2);
                int height = m_tableWidget->verticalHeader()->length();
                height += m_tableWidget->horizontalHeader()->height();
                m_tableWidget->setFixedHeight(height + 2);
            }
            
            

            But it says:unknown type name 'QBar3DSeries, QItemModelBarDataProxy, ...

            Why? I did it like you said :)

            jsulmJ 1 Reply Last reply
            0
            • ? A Former User

              This is my function, and I copied the mainfunction into it:

              void MainWindow::GrafischesDiagramm()
              {
                  //! [0]
                 // QApplication app(argc, argv);
                  Q3DBars *graph = new Q3DBars();
                  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() / 2));
                  container->setMaximumSize(screenSize);
                  container->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
                  container->setFocusPolicy(Qt::StrongFocus);
              
                  //! [1]
                  QWidget widget;
                  QVBoxLayout *layout = new QVBoxLayout(&widget);
                  QTableWidget *tableWidget = new QTableWidget(&widget);
                  layout->addWidget(container, 1);
                  layout->addWidget(tableWidget, 1, Qt::AlignHCenter);
                  //! [1]
              
                  tableWidget->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
                  tableWidget->setAlternatingRowColors(true);
                  widget.setWindowTitle(QStringLiteral("Hours spent on the Internet"));
              
                  //! [2]
                  // Since we are dealing with QTableWidget, the model will already have data sorted properly
                  // into rows and columns, so we simply set useModelCategories property to true to utilize this.
                  QItemModelBarDataProxy *proxy = new QItemModelBarDataProxy(tableWidget->model());
                  proxy->setUseModelCategories(true);
                  QBar3DSeries *series = new QBar3DSeries(proxy);
                  series->setMesh(QAbstract3DSeries::MeshPyramid);
                  graph->addSeries(series);
                  //! [2]
              
                  //! [3]
                  GraphDataGenerator generator(graph, tableWidget);
                  QObject::connect(series, &QBar3DSeries::selectedBarChanged, &generator,
                                   &GraphDataGenerator::selectFromTable);
                  QObject::connect(tableWidget, &QTableWidget::currentCellChanged, &generator,
                                   &GraphDataGenerator::selectedFromTable);
                  //! [3]
              
                  //! [4]
                  widget.show();
                  generator.start();
                  //return app.exec();
              }
              
              

              And this is outside of the mainwindow class:

              //Grafisches Diagramm
              #include <QtDataVisualization/q3dbars.h>
              #include <QtDataVisualization/qcategory3daxis.h>
              #include <QtDataVisualization/qitemmodelbardataproxy.h>
              #include <QtDataVisualization/qvalue3daxis.h>
              #include <QtDataVisualization/q3dscene.h>
              #include <QtDataVisualization/q3dcamera.h>
              #include <QtDataVisualization/qbar3dseries.h>
              #include <QtDataVisualization/q3dtheme.h>
              
              
              #include <QtWidgets/QApplication>
              #include <QtWidgets/QVBoxLayout>
              #include <QtWidgets/QTableWidget>
              #include <QtGui/QScreen>
              #include <QtCore/QRandomGenerator>
              #include <QtCore/QTimer>
              #include <QtGui/QFont>
              #include <QtCore/QDebug>
              #include <QtWidgets/QHeaderView>
              #include <QtWidgets/QMessageBox>
              
              #define USE_STATIC_DATA
              
              using namespace QtDataVisualization;
              
              class GraphDataGenerator : public QObject
              {
              public:
                  explicit GraphDataGenerator(Q3DBars *bargraph, QTableWidget *tableWidget);
                  ~GraphDataGenerator();
              
                  void setupModel();
                  void addRow();
                  void changeStyle();
                  void changePresetCamera();
                  void changeTheme();
                  void start();
                  void selectFromTable(const QPoint &selection);
                  void selectedFromTable(int currentRow, int currentColumn, int previousRow, int previousColumn);
                  void fixTableSize();
              
              private:
                  Q3DBars *m_graph;
                  QTimer *m_dataTimer;
                  int m_columnCount;
                  int m_rowCount;
                  QTableWidget *m_tableWidget; // not owned
              };
              
              GraphDataGenerator::GraphDataGenerator(Q3DBars *bargraph, QTableWidget *tableWidget)
                  : m_graph(bargraph),
                    m_dataTimer(0),
                    m_columnCount(100),
                    m_rowCount(50),
                    m_tableWidget(tableWidget)
              {
                  //! [5]
                  // Set up bar specifications; make the bars as wide as they are deep,
                  // and add a small space between them
                  m_graph->setBarThickness(1.0f);
                  m_graph->setBarSpacing(QSizeF(0.2, 0.2));
              
                  //! [5]
              #ifndef USE_STATIC_DATA
                  // Set up sample space; make it as deep as it's wide
                  m_graph->rowAxis()->setRange(0, m_rowCount);
                  m_graph->columnAxis()->setRange(0, m_columnCount);
                  m_tableWidget->setColumnCount(m_columnCount);
              
                  // Set selection mode to full
                  m_graph->setSelectionMode(QAbstract3DGraph::SelectionItemRowAndColumn);
              
                  // Hide axis labels by explicitly setting one empty string as label list
                  m_graph->rowAxis()->setLabels(QStringList(QString()));
                  m_graph->columnAxis()->setLabels(QStringList(QString()));
              
                  m_graph->seriesList().at(0)->setItemLabelFormat(QStringLiteral("@valueLabel"));
              #else
                  //! [6]
                  // Set selection mode to slice row
                  m_graph->setSelectionMode(QAbstract3DGraph::SelectionItemAndRow | QAbstract3DGraph::SelectionSlice);
              
                  //! [6]
              #endif
              
                  //! [7]
                  // Set theme
                  m_graph->activeTheme()->setType(Q3DTheme::ThemeDigia);
              
                  // Set font
                  m_graph->activeTheme()->setFont(QFont("Impact", 20));
              
                  // Set preset camera position
                  m_graph->scene()->activeCamera()->setCameraPreset(Q3DCamera::CameraPresetFront);
                  //! [7]
              }
              
              GraphDataGenerator::~GraphDataGenerator()
              {
                  if (m_dataTimer) {
                      m_dataTimer->stop();
                      delete m_dataTimer;
                  }
                  delete m_graph;
              }
              
              void GraphDataGenerator::start()
              {
              #ifndef USE_STATIC_DATA
                  m_dataTimer = new QTimer();
                  m_dataTimer->setTimerType(Qt::CoarseTimer);
                  QObject::connect(m_dataTimer, &QTimer::timeout, this, &GraphDataGenerator::addRow);
                  m_dataTimer->start(0);
                  m_tableWidget->setFixedWidth(m_graph->width());
              #else
                  //! [8]
                  setupModel();
              
                  // Table needs to be shown before the size of its headers can be accurately obtained,
                  // so we postpone it a bit
                  m_dataTimer = new QTimer();
                  m_dataTimer->setSingleShot(true);
                  QObject::connect(m_dataTimer, &QTimer::timeout, this, &GraphDataGenerator::fixTableSize);
                  m_dataTimer->start(0);
                  //! [8]
              #endif
              }
              
              void GraphDataGenerator::setupModel()
              {
                  //! [9]
                  // Set up row and column names
                  QStringList days;
                  days << "Monday" << "Tuesday" << "Wednesday" << "Thursday" << "Friday" << "Saturday" << "Sunday";
                  QStringList weeks;
                  weeks << "week 1" << "week 2" << "week 3" << "week 4" << "week 5";
              
                  // Set up data         Mon  Tue  Wed  Thu  Fri  Sat  Sun
                  float hours[5][7] = {{2.0f, 1.0f, 3.0f, 0.2f, 1.0f, 5.0f, 10.0f},     // week 1
                                       {0.5f, 1.0f, 3.0f, 1.0f, 2.0f, 2.0f, 3.0f},      // week 2
                                       {1.0f, 1.0f, 2.0f, 1.0f, 4.0f, 4.0f, 4.0f},      // week 3
                                       {0.0f, 1.0f, 0.0f, 0.0f, 2.0f, 2.0f, 0.3f},      // week 4
                                       {3.0f, 3.0f, 6.0f, 2.0f, 2.0f, 1.0f, 1.0f}};     // week 5
                  //! [9]
              
                  // Add labels
                  //! [10]
                  m_graph->rowAxis()->setTitle("Week of year");
                  m_graph->rowAxis()->setTitleVisible(true);
                  m_graph->columnAxis()->setTitle("Day of week");
                  m_graph->columnAxis()->setTitleVisible(true);
                  m_graph->valueAxis()->setTitle("Hours spent on the Internet");
                  m_graph->valueAxis()->setTitleVisible(true);
                  m_graph->valueAxis()->setLabelFormat("%.1f h");
                  //! [10]
              
                  //! [11]
                  m_tableWidget->setRowCount(5);
                  m_tableWidget->setColumnCount(7);
                  m_tableWidget->setHorizontalHeaderLabels(days);
                  m_tableWidget->setVerticalHeaderLabels(weeks);
                  m_tableWidget->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
                  m_tableWidget->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
                  m_tableWidget->setCurrentCell(-1, -1);
                  m_tableWidget->setSelectionMode(QAbstractItemView::SingleSelection);
                  //! [11]
              
                  //! [12]
                  for (int week = 0; week < weeks.size(); week++) {
                      for (int day = 0; day < days.size(); day++) {
                          QModelIndex index = m_tableWidget->model()->index(week, day);
                          m_tableWidget->model()->setData(index, hours[week][day]);
                      }
                  }
                  //! [12]
              }
              
              void GraphDataGenerator::addRow()
              {
                  m_tableWidget->model()->insertRow(0);
                  if (m_tableWidget->model()->rowCount() > m_rowCount)
                      m_tableWidget->model()->removeRow(m_rowCount);
                  for (int i = 0; i < m_columnCount; i++) {
                      QModelIndex index = m_tableWidget->model()->index(0, i);
                      m_tableWidget->model()->setData(index,
                          ((float)i / (float)m_columnCount) / 2.0f +
                                                      (float)(QRandomGenerator::global()->bounded(30)) / 100.0f);
                  }
                  m_tableWidget->resizeColumnsToContents();
              }
              
              //! [13]
              void GraphDataGenerator::selectFromTable(const QPoint &selection)
              {
                  m_tableWidget->setFocus();
                  m_tableWidget->setCurrentCell(selection.x(), selection.y());
              }
              //! [13]
              
              //! [14]
              void GraphDataGenerator::selectedFromTable(int currentRow, int currentColumn,
                                                         int previousRow, int previousColumn)
              {
                  Q_UNUSED(previousRow)
                  Q_UNUSED(previousColumn)
                  m_graph->seriesList().at(0)->setSelectedBar(QPoint(currentRow, currentColumn));
              }
              //! [14]
              
              void GraphDataGenerator::fixTableSize()
              {
                  int width = m_tableWidget->horizontalHeader()->length();
                  width += m_tableWidget->verticalHeader()->width();
                  m_tableWidget->setFixedWidth(width + 2);
                  int height = m_tableWidget->verticalHeader()->length();
                  height += m_tableWidget->horizontalHeader()->height();
                  m_tableWidget->setFixedHeight(height + 2);
              }
              
              

              But it says:unknown type name 'QBar3DSeries, QItemModelBarDataProxy, ...

              Why? I did it like you said :)

              jsulmJ Offline
              jsulmJ Offline
              jsulm
              Lifetime Qt Champion
              wrote on last edited by
              #9

              @HenrikSt-0 said in Starting App from other class:

              Why?

              Did you add the needed includes in your MainWindow also? Like

              #include <QtDataVisualization/qbar3dseries.h>
              

              https://forum.qt.io/topic/113070/qt-code-of-conduct

              ? 1 Reply Last reply
              0
              • jsulmJ jsulm

                @HenrikSt-0 said in Starting App from other class:

                Why?

                Did you add the needed includes in your MainWindow also? Like

                #include <QtDataVisualization/qbar3dseries.h>
                
                ? Offline
                ? Offline
                A Former User
                wrote on last edited by
                #10

                @jsulm Yes, I have added them there

                jsulmJ 1 Reply Last reply
                0
                • ? A Former User

                  @jsulm Yes, I have added them there

                  jsulmJ Offline
                  jsulmJ Offline
                  jsulm
                  Lifetime Qt Champion
                  wrote on last edited by
                  #11

                  @HenrikSt-0 Can you show the pro file from that example?

                  https://forum.qt.io/topic/113070/qt-code-of-conduct

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                  • jsulmJ jsulm

                    @HenrikSt-0 Can you show the pro file from that example?

                    ? Offline
                    ? Offline
                    A Former User
                    wrote on last edited by
                    #12

                    @jsulm Yes of course!
                    .pro file

                    android|ios|winrt {
                        error( "This example is not supported for android, ios, or winrt." )
                    }
                    
                    !include( ../examples.pri ) {
                        error( "Couldn't find the examples.pri file!" )
                    }
                    
                    SOURCES += main.cpp
                    
                    QT += widgets
                    requires(qtConfig(tablewidget))
                    
                    OTHER_FILES += doc/src/* \
                                   doc/images/*
                    
                    

                    .pri file

                    INCLUDEPATH += ../../../include
                    
                    LIBS += -L$$OUT_PWD/../../../lib
                    
                    TEMPLATE = app
                    
                    QT += datavisualization
                    
                    contains(TARGET, qml.*) {
                        QT += qml quick
                    }
                    
                    target.path = $$[QT_INSTALL_EXAMPLES]/datavisualization/$$TARGET
                    INSTALLS += target
                    
                    

                    QT += datavisualization i have added to my pro file

                    jsulmJ 1 Reply Last reply
                    0
                    • ? A Former User

                      @jsulm Yes of course!
                      .pro file

                      android|ios|winrt {
                          error( "This example is not supported for android, ios, or winrt." )
                      }
                      
                      !include( ../examples.pri ) {
                          error( "Couldn't find the examples.pri file!" )
                      }
                      
                      SOURCES += main.cpp
                      
                      QT += widgets
                      requires(qtConfig(tablewidget))
                      
                      OTHER_FILES += doc/src/* \
                                     doc/images/*
                      
                      

                      .pri file

                      INCLUDEPATH += ../../../include
                      
                      LIBS += -L$$OUT_PWD/../../../lib
                      
                      TEMPLATE = app
                      
                      QT += datavisualization
                      
                      contains(TARGET, qml.*) {
                          QT += qml quick
                      }
                      
                      target.path = $$[QT_INSTALL_EXAMPLES]/datavisualization/$$TARGET
                      INSTALLS += target
                      
                      

                      QT += datavisualization i have added to my pro file

                      jsulmJ Offline
                      jsulmJ Offline
                      jsulm
                      Lifetime Qt Champion
                      wrote on last edited by
                      #13

                      @HenrikSt-0 Change the includes like this:

                      #include <QBar3DSeries>
                      

                      Add

                      QT += datavisualization
                      

                      to your pro file.

                      https://forum.qt.io/topic/113070/qt-code-of-conduct

                      ? 1 Reply Last reply
                      1
                      • jsulmJ jsulm

                        @HenrikSt-0 Change the includes like this:

                        #include <QBar3DSeries>
                        

                        Add

                        QT += datavisualization
                        

                        to your pro file.

                        ? Offline
                        ? Offline
                        A Former User
                        wrote on last edited by
                        #14

                        @jsulm Yes, I did that..
                        But GraphDataGenerator also is an unknown type name...
                        Crazy..
                        This are my #includes in the mainwindow class:

                        #include <QBar3DSeries>
                        #include <Q3DBars>
                        #include <QCategory3DAxis>
                        #include <QItemModelBarDataProxy>
                        #include <QValue3DAxis>
                        #include <Q3DCamera>
                        #include <Q3DTheme>
                        

                        In the GraphDataGenerator class is everything fine and there are no #includes...

                        jsulmJ 1 Reply Last reply
                        0
                        • SGaistS Offline
                          SGaistS Offline
                          SGaist
                          Lifetime Qt Champion
                          wrote on last edited by
                          #15

                          One thing>

                          widget.show();
                          generator.start();

                          Both are local variables and will be destroyed at the end of your method so they won't have any effect.

                          Beside that, it looks like you did not copy the classes that are currently not compiling in your project.

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                          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                          1 Reply Last reply
                          1
                          • ? A Former User

                            @jsulm Yes, I did that..
                            But GraphDataGenerator also is an unknown type name...
                            Crazy..
                            This are my #includes in the mainwindow class:

                            #include <QBar3DSeries>
                            #include <Q3DBars>
                            #include <QCategory3DAxis>
                            #include <QItemModelBarDataProxy>
                            #include <QValue3DAxis>
                            #include <Q3DCamera>
                            #include <Q3DTheme>
                            

                            In the GraphDataGenerator class is everything fine and there are no #includes...

                            jsulmJ Offline
                            jsulmJ Offline
                            jsulm
                            Lifetime Qt Champion
                            wrote on last edited by
                            #16

                            @HenrikSt-0 said in Starting App from other class:

                            GraphDataGenerator

                            It is the class in the example - did you add it to your project?

                            https://forum.qt.io/topic/113070/qt-code-of-conduct

                            1 Reply Last reply
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