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#include "splinewidget.h"
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#include "qchartview.h"
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#include "qlineseries.h"
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#include <QGridLayout>
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#include <QPushButton>
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#include "qchartaxis.h"
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#include <qmath.h>
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QTCOMMERCIALCHART_USE_NAMESPACE
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SplineWidget::SplineWidget(QWidget *parent)
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: QWidget(parent)
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{
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qsrand(time(NULL));
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//! [1]
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//create QSplineSeries
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series = new QSplineSeries(this);
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//! [1]
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//! [2]
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// customize the series presentation settings
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QPen seriesPen(Qt::blue);
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seriesPen.setWidth(3);
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series->setPen(seriesPen);
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//! [2]
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//! [add points to series]
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//add data points to the series
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series->add(QPointF(150, 100));
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series->add(QPointF(200, 130));
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series->add(QPointF(250, 120));
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series->add(QPointF(300, 140));
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series->add(QPointF(350, 160));
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//! [add points to series]
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// series->add(QPointF(400, 120));
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// series->add(QPointF(450, 150));
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// series->add(QPointF(500, 145));
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// series->add(QPointF(550, 170));
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// series->add(QPointF(600, 190));
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// series->add(QPointF(650, 210));
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// series->add(QPointF(700, 190));
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// series->add(QPointF(750, 180));
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// series->add(QPointF(800, 170));
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//! [3]
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// create chart view
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QChartView* chart = new QChartView;
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chart->addSeries(series);
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chart->axisX()->setRange(0, 1500);
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chart->axisY()->setRange(0, 400);
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chart->setMinimumSize(800,600);
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//! [3]
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//! [4]
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//add new data point button
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QPushButton* addButton = new QPushButton("Add new point");
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connect(addButton, SIGNAL(clicked()), this, SLOT(addNewPoint()));
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// remove the last data point in the series
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QPushButton* removeButton = new QPushButton("Remove point");
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connect(removeButton, SIGNAL(clicked()), this, SLOT(removePoint()));
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//! [4]
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//! [5]
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//butttons layout
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QVBoxLayout* buttonsLayout = new QVBoxLayout;
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buttonsLayout->addWidget(addButton);
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buttonsLayout->addWidget(removeButton);
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buttonsLayout->addStretch();
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QGridLayout* mainLayout = new QGridLayout;
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mainLayout->addWidget(chart, 1, 0);
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mainLayout->addLayout(buttonsLayout, 1, 1);
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setLayout(mainLayout);
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//! [5]
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}
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//! [add point]
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void SplineWidget::addNewPoint()
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{
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if (series->count() > 0)
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series->add(QPointF(series->x(series->count() - 1) + 20 + qrand()%40, qAbs(series->y(series->count() - 1) - 50 + qrand()%100)));
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else
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series->add(QPointF(50, 50 + qrand()%50));
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}
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//! [add point]
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//! [remove point]
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void SplineWidget::removePoint()
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{
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if (series->count() > 0)
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series->remove(QPointF(series->x(series->count() - 1), series->y(series->count() - 1)));
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}
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//! [remove point]
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SplineWidget::~SplineWidget()
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{
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}
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