/**
 * 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 <QStandardItemModel>
#include <KChartChart>
#include <KChartBarDiagram>
#include <KChartLegend>
#include <KChartPosition>
#include <KChartBackgroundAttributes>
#include <KChartFrameAttributes>
#include <QApplication>

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) );
            }
    }

    BarDiagram* diagram = new BarDiagram;
    diagram->setModel(&m_model);

    m_chart.coordinatePlane()->replaceDiagram(diagram);

    // Add at one legend and set it up
    Legend* legend = new Legend( diagram, &m_chart );
    legend->setPosition( Position::North );
    legend->setAlignment( Qt::AlignCenter );
    legend->setShowLines( true );
    legend->setSpacing( 5 );
    legend->setTitleText( tr( "Legend" ) );
    legend->setOrientation( Qt::Horizontal );
    m_chart.addLegend( legend );

    // Configure the items markers
    MarkerAttributes lma ( legend->markerAttributes( 0 ) );
    lma.setMarkerStyle( MarkerAttributes::MarkerDiamond );
    legend->setMarkerAttributes( 0,  lma );
    lma.setMarkerStyle( MarkerAttributes::MarkerCircle );
    legend->setMarkerAttributes( 1,  lma );

    // Configure Legend Title and labels
    legend->setTitleText( "Bars" );
    legend->setText( 0,  "Series 1" );
    legend->setText( 1,  "Series 2" );
    legend->setText( 2,  "Series 3" );

    // adjust the legend item's font:
    TextAttributes lta( legend->textAttributes() );
    lta.setPen( QPen( Qt::darkGray ) );
    Measure me( lta.fontSize() );
    me.setValue( me.value() * 1.5 );
    lta.setFontSize( Measure( 9, KChartEnums::MeasureCalculationModeAbsolute ) );
    legend->setTextAttributes(  lta );

    // adjust the legend title's font:
    lta = legend->titleTextAttributes();
    lta.setPen( QPen( Qt::darkGray ) );
    me = lta.fontSize();
    me.setValue( me.value() * 1.5 );
    lta.setFontSize( me );
    legend->setTitleTextAttributes(  lta );

    // Configure a pen to surround
    // the markers with a border
    QPen markerPen;
    markerPen.setColor(  Qt::darkGray );
    markerPen.setWidth( 2 );
    // Pending Michel use datasetCount() here as soon
    // as it is fixed
    for (  uint i = 0; i < /*legend->datasetCount()*/ 3; i++ )
        legend->setPen( i,  markerPen );

    // Add a background to your legend
    BackgroundAttributes ba;
    ba.setBrush(  Qt::white );
    ba.setVisible( true );
    legend->setBackgroundAttributes(  ba );

    FrameAttributes fa;
    fa.setPen( markerPen );
    fa.setVisible( true );
    legend->setFrameAttributes(  fa );

    QVBoxLayout* l = new QVBoxLayout(this);
    l->addWidget(&m_chart);
    m_chart.setGlobalLeadingTop( 10 );
    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"
