File indexing completed on 2025-01-26 04:02:44

 /**
  * 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 <QLabel>
 #include <QString>
 #include <QTextStream>
 
 #include <KChartChart>
 #include <KChartTernaryAxis>
 #include <KChartTernaryLineDiagram>
 #include <KChartTernaryPointDiagram>
 #include <KChartTernaryCoordinatePlane>
 
 #include "mainwindow.h"
 
 MainWindow::MainWindow( QWidget* parent )
     : QDialog( parent )
     , m_chart( nullptr )
     , m_diagram( nullptr )
     , m_ternaryPlane( nullptr )
 {
     setupUi( this );
     // make a chart
     m_chart = new KChart::Chart;
     // replace the default (cartesian) coordinate plane with a ternary one
     m_ternaryPlane = new KChart::TernaryCoordinatePlane;
     m_chart->replaceCoordinatePlane( m_ternaryPlane );
     // make a ternary line diagram
     m_diagram = new KChart::TernaryPointDiagram;
     // and replace the default diagram with it
     m_ternaryPlane->replaceDiagram( m_diagram );
 
     // add the three ternary axes, see the positions
     KChart::TernaryAxis* axisA = new KChart::TernaryAxis( m_diagram );
     axisA->setPosition( KChartEnums::PositionSouth );
     KChart::TernaryAxis* axisB = new KChart::TernaryAxis( m_diagram );
     axisB->setPosition( KChartEnums::PositionWest );
     KChart::TernaryAxis* axisC = new KChart::TernaryAxis( m_diagram );
     axisC->setPosition( KChartEnums::PositionEast );
 
     QHBoxLayout* chartLayout = new QHBoxLayout( frame );
     chartLayout->addWidget( m_chart );
 
     setupModel();
     m_diagram->setModel( &m_model );
     connect( m_diagram, SIGNAL(clicked(QModelIndex)),
              SLOT(indexClicked(QModelIndex)) );
 }
 
 void MainWindow::setupModel()
 {
     m_model.insertRows( 0, 5 );
     m_model.insertColumns(  0,  3 );
 
     const float column0Share = 1.0f/3.0f;
     const float column1Share = 1.0f/3.0f;
     const float column2Share = 1.0f/3.0f;
 
     for ( int row = 0; row < m_model.rowCount(); ++row ) {
         const qreal SkewX = column0Share * ( 1 - 1.0/( 5 * row*row*row + 1 ) );
         const qreal SkewY = SkewX;
         QModelIndex index;
 
         index = m_model.index( row, 0 );
         m_model.setData( index, QVariant( column0Share - SkewX ) );
         index = m_model.index( row, 1 );
         m_model.setData( index, QVariant( column1Share + SkewX - SkewY) );
         index = m_model.index( row, 2 );
         m_model.setData( index, QVariant( column2Share + SkewY ) );
     }
 }
 
 void MainWindow::indexClicked( const QModelIndex& index )
 {
     qDebug() << "MainWindow::indexClicked:" << index;
     if ( index.isValid() ) {
         QString text;
         QTextStream stream( &text );
         stream << "Row: " << index.row() << " - Column: " << index.column();
         label->setText( text );
     }
 }