File indexing completed on 2024-05-12 04:20:13

 /**
  * SPDX-FileCopyrightText: 2001-2015 Klaralvdalens Datakonsult AB. All rights reserved.
  *
  * This file is part of the KD Chart library.
  *
  * SPDX-License-Identifier: GPL-2.0-or-later
  */
 
 #include <QStandardItemModel>
 #include <QTimer>
 #include <KChartChart>
 #include <KChartBarDiagram>
 
 #include <QApplication>
 
 
 class ChartWidget : public QWidget {
   Q_OBJECT
 public:
   explicit ChartWidget(QWidget* parent = nullptr)
     : QWidget(parent)
   {
 
     m_model.insertRows( 0, 2, QModelIndex() );
     m_model.insertColumns(  0,  3,  QModelIndex() );
     for (int row = 0; row < 3; ++row) {
             for (int column = 0; column < 3; ++column) {
                 QModelIndex index = m_model.index(row, column, QModelIndex());
                 m_model.setData(index, QVariant(row+1 * column) );
             }
     }
 
     KChart::BarDiagram* diagram = new KChart::BarDiagram;
     diagram->setModel(&m_model);
 
     m_chart.coordinatePlane()->replaceDiagram(diagram);
 
     QVBoxLayout* l = new QVBoxLayout(this);
     l->addWidget(&m_chart);
     setLayout(l);
     m_timer = new QTimer(this);
     connect( m_timer, SIGNAL(timeout()),
              this, SLOT(slotTimeout()) );
     m_timer->start( 200 );
   }
 
 private Q_SLOTS:
       void slotTimeout() {
           QModelIndex index = m_model.index( 0, 1, QModelIndex());
           qreal value = ( m_model.data( index ).toInt() % 24 ) +1;
           m_model.setData( index, value );
       }
 
 private:
   KChart::Chart m_chart;
   QStandardItemModel m_model;
   QTimer *m_timer;
 };
 
 int main( int argc, char** argv ) {
     QApplication app( argc, argv );
 
     ChartWidget w;
     w.show();
 
     return app.exec();
 }
 
 #include "main.moc"