polarchartwidget.cpp

Enable keyboard shortcuts

// Copyright (C) 2023 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause

#include "polarchartview.h"

#include "polarchartwidget.h"

#include <QAreaSeries>

#include <QChart>

#include <QLineSeries>

#include <QPolarChart>

#include <QScatterSeries>

#include <QSplineSeries>

#include <QValueAxis>

PolarChartWidget::PolarChartWidget(QWidget *parent)

    : ContentWidget(parent)

    const qreal angularMin = -100;

    const qreal angularMax = 100;

    const qreal radialMin = -100;

    const qreal radialMax = 100;

    auto series1 = new QScatterSeries;

    series1->setName("scatter");

    for (int i = angularMin; i <= angularMax; i += 10)

        series1->append(i, (i / radialMax) * radialMax + 8.0);

    auto series2 = new QSplineSeries;

    series2->setName("spline");

    for (int i = angularMin; i <= angularMax; i += 10)

        series2->append(i, (i / radialMax) * radialMax);

    auto series3 = new QLineSeries;

    series3->setName("star outer");

    qreal ad = (angularMax - angularMin) / 8;

    qreal rd = (radialMax - radialMin) / 3 * 1.3;

    series3->append(angularMin, radialMax);

    series3->append(angularMin + ad * 1, radialMin + rd);

    series3->append(angularMin + ad * 2, radialMax);

    series3->append(angularMin + ad * 3, radialMin + rd);

    series3->append(angularMin + ad * 4, radialMax);

    series3->append(angularMin + ad * 5, radialMin + rd);

    series3->append(angularMin + ad * 6, radialMax);

    series3->append(angularMin + ad * 7, radialMin + rd);

    series3->append(angularMin + ad * 8, radialMax);

    auto series4 = new QLineSeries;

    series4->setName("star inner");

    ad = (angularMax - angularMin) / 8;

    rd = (radialMax - radialMin) / 3;

    series4->append(angularMin, radialMax);

    series4->append(angularMin + ad * 1, radialMin + rd);

    series4->append(angularMin + ad * 2, radialMax);

    series4->append(angularMin + ad * 3, radialMin + rd);

    series4->append(angularMin + ad * 4, radialMax);

    series4->append(angularMin + ad * 5, radialMin + rd);

    series4->append(angularMin + ad * 6, radialMax);

    series4->append(angularMin + ad * 7, radialMin + rd);

    series4->append(angularMin + ad * 8, radialMax);

    auto series5 = new QAreaSeries;

    series5->setName("star area");

    series5->setUpperSeries(series3);

    series5->setLowerSeries(series4);

    series5->setOpacity(0.5);

    //![1]

    auto chart = new QPolarChart;

    //![1]

    chart->addSeries(series1);

    chart->addSeries(series2);

    chart->addSeries(series3);

    chart->addSeries(series4);

    chart->addSeries(series5);

    chart->setTitle("Use arrow keys to scroll, +/- to zoom, and space to switch chart type.");

    //![2]

    auto angularAxis = new QValueAxis;

    angularAxis->setTickCount(9); // First and last ticks are co-located on 0/360 angle.

    angularAxis->setLabelFormat("%.1f");

    angularAxis->setShadesVisible(true);

    angularAxis->setShadesBrush(QBrush(QColor(249, 249, 255)));

    chart->addAxis(angularAxis, QPolarChart::PolarOrientationAngular);

    auto radialAxis = new QValueAxis;

    radialAxis->setTickCount(9);

    radialAxis->setLabelFormat("%d");

    chart->addAxis(radialAxis, QPolarChart::PolarOrientationRadial);

    //![2]

    series1->attachAxis(radialAxis);

    series1->attachAxis(angularAxis);

    series2->attachAxis(radialAxis);

    series2->attachAxis(angularAxis);

    series3->attachAxis(radialAxis);

    series3->attachAxis(angularAxis);

    series4->attachAxis(radialAxis);

    series4->attachAxis(angularAxis);

    series5->attachAxis(radialAxis);

    series5->attachAxis(angularAxis);

    radialAxis->setRange(radialMin, radialMax);

    angularAxis->setRange(angularMin, angularMax);

    auto chartView = new PolarChartView(this);

    chartView->setChart(chart);

    setDefaultChartView(chartView);