/****************************************************************************
**
** Copyright (C) 2012 Digia Plc
** All rights reserved.
** For any questions to Digia, please use contact form at http://qt.digia.com
**
** This file is part of the Qt Commercial Charts Add-on.
**
** $QT_BEGIN_LICENSE$
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.
**
** If you have questions regarding the use of this file, please use
** contact form at http://qt.digia.com
** $QT_END_LICENSE$
**
****************************************************************************/

#include "chartview.h"
#include <QLineSeries>
#include <QScatterSeries>
#include <QSplineSeries>
#include <QAreaSeries>
#include <QTime>

ChartView::ChartView(QChart* chart,QWidget* parent):
    QChartView(chart,parent),
    m_index(-1),
    m_chart(chart)
{
    m_chart->setTitle("Charts presenter");
    m_chart->setDropShadowEnabled(false);
    QObject::connect(&m_timer,SIGNAL(timeout()),this,SLOT(handleTimeout()));
    m_timer.setInterval(3000);

    //![1]
    QLineSeries* series0 = new QLineSeries();
    series0->setName("line");

    QScatterSeries* series1 = new QScatterSeries();
    series1->setName("scatter");

    QSplineSeries* series2 = new QSplineSeries();
    series2->setName("spline");

    QAreaSeries* series3 = new QAreaSeries(series0);
    series3->setName("area");
    //![1]

    //![2]
    int numPoints = 10;

    for (int x = 0; x <= numPoints; ++x) {
        qreal y = qrand() % 100;
        series0->append(x,y);
        series1->append(x,y);
        series2->append(x,y);
    }
    //![2]

    //![3]
    m_series<<series0;
    m_titles<< m_chart->title()+": LineChart";
    m_series<<series1;
    m_titles<< m_chart->title()+": ScatterChart";
    m_series<<series2;
    m_titles<< m_chart->title()+": SplineChart";
    m_series<<series3;
    m_titles<< m_chart->title()+": AreaChart";
    //![3]

    m_timer.start();
    handleTimeout();
}

ChartView::~ChartView()
{
    if(m_series.size() == 0) return;
    m_chart->removeSeries(m_series.at(m_index));
    m_series.removeLast();  //remove QAreaSeries instance since they will be deleted when QLineSeries instance is gone
    qDeleteAll(m_series);
}

//![4]
void ChartView::handleTimeout()
{
    if(m_series.size() == 0) return;
    if(m_index >= 0)
        m_chart->removeSeries(m_series.at(m_index));
    m_index++;
    m_index = m_index % m_series.size();
    m_chart->addSeries(m_series.at(m_index));
    m_chart->setTitle(m_titles.at(m_index));
    m_chart->createDefaultAxes();
}
//![4]