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Starting App from other class



  • Hello everybody,
    I have for example this code:

    /****************************************************************************
    **
    ** 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
    ** Software or, alternatively, in accordance with the terms contained in
    ** a written agreement between you and The Qt Company. For licensing terms
    ** and conditions see https://www.qt.io/terms-conditions. For further
    ** 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
    ** information to ensure the GNU General Public License requirements will
    ** be met: https://www.gnu.org/licenses/gpl-3.0.html.
    **
    ** $QT_END_LICENSE$
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    ****************************************************************************/
    
    #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>
    
    //MainWindow
    #include <ui_mainwindow.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);
    }
    
    int main(int argc, char **argv)
    {
        //! [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();
        //! [4]
    }
    
    

    It's an QT-example for datavizalisation.

    and now my question: How can I start this App from another class?
    I can't use the Main() function for that, am I right?

    Thanks
    Henrik


  • Qt Champions 2019

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


  • Lifetime Qt Champion

    Hi and welcome to devnet,

    Do you mean starting the executable that can be generated from the example or re-use the code in your own application ?



  • @jsulm I know, but how?


  • Qt Champions 2019

    @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...



  • @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?


  • Qt Champions 2019

    @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().



  • 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 :)


  • Qt Champions 2019

    @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>
    


  • @jsulm Yes, I have added them there


  • Qt Champions 2019

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



  • @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


  • Qt Champions 2019

    @HenrikSt-0 Change the includes like this:

    #include <QBar3DSeries>
    

    Add

    QT += datavisualization
    

    to your pro file.



  • @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...


  • Lifetime Qt Champion

    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.


  • Qt Champions 2019

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

    GraphDataGenerator

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