File indexing completed on 2024-06-09 04:18:33

 /*
  * 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 "KChartTernaryLineDiagram.h"
 #include "KChartTernaryLineDiagram_p.h"
 
 #include <limits>
 
 #include <QPainter>
 
 #include <KChartPaintContext.h>
 
 #include "KChartLineAttributes.h"
 #include "KChartDataValueAttributes.h"
 #include "KChartMarkerAttributes.h"
 #include "TernaryPoint.h"
 #include "TernaryConstants.h"
 #include "KChartPainterSaver_p.h"
 
 using namespace KChart;
 
 #define d d_func()
 
 TernaryLineDiagram::Private::Private()
     : AbstractTernaryDiagram::Private()
 {
 }
 
 TernaryLineDiagram::TernaryLineDiagram ( QWidget* parent,
                                          TernaryCoordinatePlane* plane )
     : AbstractTernaryDiagram( new Private(), parent, plane )
 {
     init();
     setDatasetDimensionInternal( 3 ); // the third column is implicit
 
     DataValueAttributes dataValueAttributes;
     dataValueAttributes.setVisible( true );
     MarkerAttributes markerAttributes;
     markerAttributes.setMarkerStyle( MarkerAttributes::MarkerCircle );
     markerAttributes.setVisible( true );
     dataValueAttributes.setMarkerAttributes( markerAttributes );
     attributesModel()->setDefaultForRole(
         KChart::DataValueLabelAttributesRole,
         QVariant::fromValue( dataValueAttributes ) );
 }
 
 TernaryLineDiagram::~TernaryLineDiagram()
 {
 }
 
 void TernaryLineDiagram::init()
 {
 }
 
 void  TernaryLineDiagram::resize (const QSizeF& area)
 {
     AbstractTernaryDiagram::resize( area );
 }
 
 void  TernaryLineDiagram::paint (PaintContext *paintContext)
 {
     d->reverseMapper.clear();
 
     d->paint( paintContext );
     // sanity checks:
     if ( model() == nullptr ) return;
 
     QPainter* p = paintContext->painter();
     PainterSaver s( p );
 
     TernaryCoordinatePlane* plane =
         (TernaryCoordinatePlane*) paintContext->coordinatePlane();
     Q_ASSERT( plane );
 
     qreal x, y, z;
 
     // for some reason(?) TernaryPointDiagram is using per-diagram DVAs only:
     const DataValueAttributes attrs( dataValueAttributes() );
 
     d->forgetAlreadyPaintedDataValues();
 
     int columnCount = model()->columnCount( rootIndex() );
     QPointF start;
     for (int column=0; column<columnCount; column+=datasetDimension() )
     {
         int numrows = model()->rowCount( rootIndex() );
         for ( int row = 0; row < numrows; row++ )
         {
             // see if there is data otherwise skip
             QModelIndex base = model()->index( row, column ); // checked
             if ( ! model()->data( base ).isNull() )
             {
                 p->setPen( PrintingParameters::scalePen( pen( base ) ) );
                 p->setBrush( brush( base ) );
 
                 // retrieve data
                 x = qMax<qreal>( model()->data( model()->index( row, column, rootIndex() ) ).toReal(), // checked
                           0.0 );
                 y = qMax<qreal>( model()->data( model()->index( row, column+1, rootIndex() ) ).toReal(), // checked
                           0.0 );
                 z = qMax<qreal>( model()->data( model()->index( row, column+2, rootIndex() ) ).toReal(), // checked
                           0.0 );
 
                 qreal total = x + y + z;
                 if ( fabs( total ) > 3 * std::numeric_limits<qreal>::epsilon() ) {
                     TernaryPoint tPunkt( x / total, y / total );
                     QPointF diagramLocation = translate( tPunkt );
                     QPointF widgetLocation = plane->translate( diagramLocation );
 
                     if ( row > 0 ) {
                         p->drawLine( start, widgetLocation );
                     }
                     paintMarker( p, model()->index( row, column, rootIndex() ), widgetLocation ); // checked
                     start = widgetLocation;
                     // retrieve text and data value attributes
                     // FIXME use data model DisplayRole text
                     QString text = tr( "(%1, %2, %3)", "(x, y, z) values of the data point" )
                                    .arg( x * 100, 0, 'f', 0 )
                                    .arg( y * 100, 0, 'f', 0 )
                                    .arg( z * 100, 0, 'f', 0 );
                     d->paintDataValueText( p, attrs, widgetLocation, true, text, true );
                 } else {
                     // ignore and do not paint this point, garbage data
                     qDebug() << "TernaryPointDiagram::paint: data point x/y/z:"
                              << x << "/" << y << "/" << z << "ignored, unusable.";
                 }
             }
         }
     }
 }
 
 const QPair< QPointF, QPointF >  TernaryLineDiagram::calculateDataBoundaries () const
 {
     // this is a constant, because we defined it to be one:
     static QPair<QPointF, QPointF> Boundaries(
         TriangleBottomLeft,
         QPointF( TriangleBottomRight.x(), TriangleHeight ) );
     return Boundaries;
 }