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/**
* Copyright (C) 2001-2015 Klaralvdalens Datakonsult AB. All rights reserved.
*
* This file is part of the KD Chart library.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#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"
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