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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 <KChartChart>
#include <KChartPieDiagram>
#include <KChartDataValueAttributes>
#include <KChartBackgroundAttributes>
#include <KChartPieAttributes>
#include <KChartPosition>
#include <QApplication>
using namespace KChart;
class ChartWidget : public QWidget {
Q_OBJECT
public:
explicit ChartWidget(QWidget* parent = nullptr)
: QWidget(parent)
{
m_model.insertRows( 0, 1, QModelIndex() );
m_model.insertColumns( 0, 6, QModelIndex() );
for (int row = 0; row < 1; ++row) {
for (int column = 0; column < 6; ++column) {
QModelIndex index = m_model.index(row, column, QModelIndex());
m_model.setData(index, QVariant(row+1 * column+1) );
// this shows the index as static comments:
// m_model.setData(index, QString("row: %1, column: %2").arg(row).arg(column), KChart::CommentRole);
// this shows the index as volatile tooltips:
m_model.setData(index, QString("row: %1, column: %2").arg(row).arg(column), Qt::ToolTipRole);
}
}
// We need a Polar plane for the Pie type
PolarCoordinatePlane* polarPlane = new PolarCoordinatePlane( &m_chart );
// replace the default Cartesian plane with
// our Polar plane
m_chart.replaceCoordinatePlane( polarPlane );
// assign the model to our pie diagram
PieDiagram* diagram = new PieDiagram;
diagram->setModel(&m_model);
// Configure some Pie specifical attributes
// explode a section
PieAttributes pa( diagram->pieAttributes() );
pa.setExplodeFactor( 0.1 );
// Assign the attributes
// to the diagram
diagram->setPieAttributes( 1, pa );
// Configure a generic attribute
// available to all chart types
QPen sectionPen;
sectionPen.setWidth( 5 );
sectionPen.setStyle( Qt::DashLine );
sectionPen.setColor( Qt::magenta );
diagram->setPen( 1, sectionPen );
// Display data values
// not implemented yet - disable for now
const QFont font(QFont( "Comic", 10 ));
const int colCount = diagram->model()->columnCount();
for ( int iColumn = 0; iColumn<colCount; ++iColumn ) {
DataValueAttributes dva( diagram->dataValueAttributes( iColumn ) );
TextAttributes ta( dva.textAttributes() );
ta.setRotation( 0 );
ta.setFont( font );
ta .setPen( QPen( Qt::darkBlue ) );
ta.setVisible( true );
dva.setTextAttributes( ta );
BackgroundAttributes back( dva.backgroundAttributes() );
back.setBrush( QBrush( QColor(255,0,0) ) );
back.setVisible( true );
dva.setBackgroundAttributes( back );
RelativePosition posPos( dva.positivePosition() );
posPos.setReferencePosition( KChart::Position::North );
posPos.setAlignment( Qt::AlignCenter );
posPos.setHorizontalPadding( KChart::Measure(0.0) );
posPos.setVerticalPadding( KChart::Measure(-1000.0) );
dva.setPositivePosition( posPos );
dva.setVisible( true );
diagram->setDataValueAttributes( iColumn, dva);
}
// Assign our diagram to the Chart
m_chart.coordinatePlane()->replaceDiagram(diagram);
QVBoxLayout* l = new QVBoxLayout(this);
l->addWidget(&m_chart);
setLayout(l);
}
private:
Chart m_chart;
QStandardItemModel m_model;
};
int main( int argc, char** argv ) {
QApplication app( argc, argv );
ChartWidget w;
w.show();
return app.exec();
}
#include "main.moc"
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