KD Chart 2
[rev.2.5]
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00001 /**************************************************************************** 00002 ** Copyright (C) 2001-2012 Klaralvdalens Datakonsult AB. All rights reserved. 00003 ** 00004 ** This file is part of the KD Chart library. 00005 ** 00006 ** Licensees holding valid commercial KD Chart licenses may use this file in 00007 ** accordance with the KD Chart Commercial License Agreement provided with 00008 ** the Software. 00009 ** 00010 ** 00011 ** This file may be distributed and/or modified under the terms of the 00012 ** GNU General Public License version 2 and version 3 as published by the 00013 ** Free Software Foundation and appearing in the file LICENSE.GPL.txt included. 00014 ** 00015 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE 00016 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 00017 ** 00018 ** Contact info@kdab.com if any conditions of this licensing are not 00019 ** clear to you. 00020 ** 00021 **********************************************************************/ 00022 00023 #include "KDChartTernaryLineDiagram.h" 00024 #include "KDChartTernaryLineDiagram_p.h" 00025 00026 #include <limits> 00027 00028 #include <QPainter> 00029 00030 #include <KDChartPaintContext.h> 00031 00032 #include "KDChartLineAttributes.h" 00033 #include "KDChartDataValueAttributes.h" 00034 #include "KDChartMarkerAttributes.h" 00035 #include "TernaryPoint.h" 00036 #include "TernaryConstants.h" 00037 #include "KDChartPainterSaver_p.h" 00038 00039 using namespace KDChart; 00040 00041 #define d d_func() 00042 00043 TernaryLineDiagram::Private::Private() 00044 : AbstractTernaryDiagram::Private() 00045 { 00046 } 00047 00048 TernaryLineDiagram::TernaryLineDiagram ( QWidget* parent, 00049 TernaryCoordinatePlane* plane ) 00050 : AbstractTernaryDiagram( new Private(), parent, plane ) 00051 { 00052 init(); 00053 setDatasetDimensionInternal( 3 ); // the third column is implicit 00054 00055 DataValueAttributes dataValueAttributes; 00056 dataValueAttributes.setVisible( true ); 00057 MarkerAttributes markerAttributes; 00058 markerAttributes.setMarkerStyle( MarkerAttributes::MarkerCircle ); 00059 markerAttributes.setVisible( true ); 00060 dataValueAttributes.setMarkerAttributes( markerAttributes ); 00061 attributesModel()->setDefaultForRole( 00062 KDChart::DataValueLabelAttributesRole, 00063 qVariantFromValue( dataValueAttributes ) ); 00064 } 00065 00066 TernaryLineDiagram::~TernaryLineDiagram() 00067 { 00068 } 00069 00070 void TernaryLineDiagram::init() 00071 { 00072 } 00073 00074 void TernaryLineDiagram::resize (const QSizeF& area) 00075 { 00076 Q_UNUSED( area ); 00077 } 00078 00079 void TernaryLineDiagram::paint (PaintContext *paintContext) 00080 { 00081 d->reverseMapper.clear(); 00082 00083 d->paint( paintContext ); 00084 // sanity checks: 00085 if ( model() == 0 ) return; 00086 00087 QPainter* p = paintContext->painter(); 00088 PainterSaver s( p ); 00089 00090 TernaryCoordinatePlane* plane = 00091 (TernaryCoordinatePlane*) paintContext->coordinatePlane(); 00092 Q_ASSERT( plane ); 00093 00094 qreal x, y, z; 00095 00096 // for some reason(?) TernaryPointDiagram is using per-diagram DVAs only: 00097 const DataValueAttributes attrs( dataValueAttributes() ); 00098 00099 d->forgetAlreadyPaintedDataValues(); 00100 00101 int columnCount = model()->columnCount( rootIndex() ); 00102 QPointF start; 00103 for(int column=0; column<columnCount; column+=datasetDimension() ) 00104 { 00105 int numrows = model()->rowCount( rootIndex() ); 00106 for( int row = 0; row < numrows; row++ ) 00107 { 00108 // see if there is data otherwise skip 00109 QModelIndex base = model()->index( row, column ); // checked 00110 if( ! model()->data( base ).isNull() ) 00111 { 00112 p->setPen( PrintingParameters::scalePen( pen( base ) ) ); 00113 p->setBrush( brush( base ) ); 00114 00115 // retrieve data 00116 x = qMax( model()->data( model()->index( row, column, rootIndex() ) ).toReal(), // checked 00117 0.0 ); 00118 y = qMax( model()->data( model()->index( row, column+1, rootIndex() ) ).toReal(), // checked 00119 0.0 ); 00120 z = qMax( model()->data( model()->index( row, column+2, rootIndex() ) ).toReal(), // checked 00121 0.0 ); 00122 00123 qreal total = x + y + z; 00124 if ( fabs( total ) > 3 * std::numeric_limits<qreal>::epsilon() ) { 00125 TernaryPoint tPunkt( x / total, y / total ); 00126 QPointF diagramLocation = translate( tPunkt ); 00127 QPointF widgetLocation = plane->translate( diagramLocation ); 00128 00129 if ( row > 0 ) { 00130 p->drawLine( start, widgetLocation ); 00131 } 00132 paintMarker( p, model()->index( row, column, rootIndex() ), widgetLocation ); // checked 00133 start = widgetLocation; 00134 // retrieve text and data value attributes 00135 // FIXME use data model DisplayRole text 00136 QString text = tr( "(%1, %2, %3)" ) 00137 .arg( x * 100, 0, 'f', 0 ) 00138 .arg( y * 100, 0, 'f', 0 ) 00139 .arg( z * 100, 0, 'f', 0 ); 00140 d->paintDataValueText( p, attrs, widgetLocation, true, text, true ); 00141 } else { 00142 // ignore and do not paint this point, garbage data 00143 qDebug() << "TernaryPointDiagram::paint: data point x/y/z:" 00144 << x << "/" << y << "/" << z << "ignored, unusable."; 00145 } 00146 } 00147 } 00148 } 00149 } 00150 00151 const QPair< QPointF, QPointF > TernaryLineDiagram::calculateDataBoundaries () const 00152 { 00153 // this is a constant, because we defined it to be one: 00154 static QPair<QPointF, QPointF> Boundaries( 00155 TriangleBottomLeft, 00156 QPointF( TriangleBottomRight.x(), TriangleHeight ) ); 00157 return Boundaries; 00158 }