Warning, file /graphics/kdiagram/examples/Background/main.cpp was not indexed or was modified since last indexation (in which case cross-reference links may be missing, inaccurate or erroneous).

 /**
  * 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 <QApplication>
 #include <QStandardItemModel>
 #include <QWidget>
 #include <KChartChart>
 #include <KChartBarDiagram>
 #include <KChartHeaderFooter>
 #include <KChartPosition>
 #include <KChartBackgroundAttributes>
 #include <KChartFrameAttributes>
 
 #include <QPixmap>
 
 using namespace KChart;
 
 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) );
             }
     }
 
     QPixmap* pixmap = new QPixmap ( "background.png" );
     BarDiagram* diagram = new BarDiagram;
     diagram->setModel(&m_model);
 
     m_chart.coordinatePlane()->replaceDiagram(diagram);
 
     // Add at one Header and set it up
     HeaderFooter* header = new HeaderFooter( &m_chart );
     header->setPosition( Position::North );
     header->setText( "A Simple Bar Chart" );
     m_chart.addHeaderFooter( header );
 
     // Configure the Header text attributes
     TextAttributes hta;
     hta.setPen( QPen(  Qt::blue ) );
 
     // let the header resize itself
     // together with the widget.
     // so-called relative size
     Measure m( 35.0 );
     m.setRelativeMode( header->autoReferenceArea(),
                        KChartEnums::MeasureOrientationMinimum );
     hta.setFontSize( m );
     // min font size
     m.setValue( 3.0 );
     m.setCalculationMode( KChartEnums::MeasureCalculationModeAbsolute );
     hta.setMinimalFontSize( m );
     header->setTextAttributes( hta );
 
     // Configure the plane's Background
     BackgroundAttributes pba;
     pba.setPixmap(  *pixmap );
     pba.setPixmapMode(  BackgroundAttributes::BackgroundPixmapModeStretched );
     pba.setVisible( true );
     diagram->coordinatePlane()->setBackgroundAttributes(  pba );
 
     // Configure the Header's Background
     BackgroundAttributes hba;
     hba.setBrush( Qt::white );
     hba.setVisible( true );
     header->setBackgroundAttributes(  hba );
 
     // Configure the plane Frame attributes
     FrameAttributes pfa;
     pfa.setPen( QPen ( QBrush( Qt::blue ), 2 ) );
     pfa.setVisible( true );
     diagram->coordinatePlane()->setFrameAttributes(  pfa );
 
     // Configure the header Frame attributes
     FrameAttributes hfa;
     hfa.setPen( QPen ( QBrush( Qt::darkGray ), 2 ) );
     hfa.setPadding( 2 );
     hfa.setVisible( true );
     header->setFrameAttributes(  hfa );
 
     QVBoxLayout* l = new QVBoxLayout(this);
     l->addWidget(&m_chart);
     setLayout(l);
   }
 
 private:
   Chart m_chart;
   QStandardItemModel m_model;
     QPixmap pixmap;
 };
 
 int main( int argc, char** argv ) {
     QApplication app( argc, argv );
 
     ChartWidget w;
     w.show();
 
     return app.exec();
 }
 
 #include "main.moc"