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/****************************************************************************
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**
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** Copyright (C) 2013 Digia Plc
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** All rights reserved.
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** For any questions to Digia, please use contact form at http://qt.digia.com
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**
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** This file is part of the Qt Commercial Charts Add-on.
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**
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** $QT_BEGIN_LICENSE$
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt Commercial License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Digia.
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**
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** If you have questions regarding the use of this file, please use
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** contact form at http://qt.digia.com
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "mainwidget.h"
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#include <QChart>
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#include <QChartView>
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#include <QPushButton>
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#include <QLabel>
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#include <QDebug>
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#include <QLegend>
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#include <QFormLayout>
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#include <QLegendMarker>
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#include <QLineSeries>
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#include <QXYLegendMarker>
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#include <qmath.h>
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QTCOMMERCIALCHART_USE_NAMESPACE
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MainWidget::MainWidget(QWidget *parent) :
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QWidget(parent)
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{
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// Create chart view with the chart
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m_chart = new QChart();
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m_chartView = new QChartView(m_chart, this);
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// Create layout for grid and detached legend
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m_mainLayout = new QGridLayout();
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m_mainLayout->addWidget(m_chartView, 0, 1, 3, 1);
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setLayout(m_mainLayout);
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// Add few series
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addSeries();
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addSeries();
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addSeries();
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addSeries();
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connectMarkers();
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// Set the title and show legend
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m_chart->setTitle("Legendmarker example (click on legend)");
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m_chart->legend()->setVisible(true);
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m_chart->legend()->setAlignment(Qt::AlignBottom);
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m_chartView->setRenderHint(QPainter::Antialiasing);
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}
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void MainWidget::addSeries()
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{
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QLineSeries *series = new QLineSeries();
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m_series.append(series);
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series->setName(QString("line " + QString::number(m_series.count())));
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// Make some sine wave for data
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QList<QPointF> data;
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int offset = m_chart->series().count();
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for (int i = 0; i < 360; i++) {
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qreal x = offset * 20 + i;
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data.append(QPointF(i, qSin(2.0 * 3.141592 * x / 360.0)));
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}
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series->append(data);
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m_chart->addSeries(series);
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if (m_series.count() == 1) {
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m_chart->createDefaultAxes();
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}
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}
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void MainWidget::removeSeries()
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{
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// Remove last series from chart
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if (m_series.count() > 0) {
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QLineSeries *series = m_series.last();
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m_chart->removeSeries(series);
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m_series.removeLast();
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delete series;
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}
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}
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void MainWidget::connectMarkers()
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{
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//![1]
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// Connect all markers to handler
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foreach (QLegendMarker* marker, m_chart->legend()->markers()) {
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// Disconnect possible existing connection to avoid multiple connections
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QObject::disconnect(marker, SIGNAL(clicked()), this, SLOT(handleMarkerClicked()));
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QObject::connect(marker, SIGNAL(clicked()), this, SLOT(handleMarkerClicked()));
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}
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//![1]
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}
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void MainWidget::disconnectMarkers()
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{
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//![2]
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foreach (QLegendMarker* marker, m_chart->legend()->markers()) {
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QObject::disconnect(marker, SIGNAL(clicked()), this, SLOT(handleMarkerClicked()));
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}
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//![2]
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}
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void MainWidget::handleMarkerClicked()
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{
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//![3]
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QLegendMarker* marker = qobject_cast<QLegendMarker*> (sender());
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Q_ASSERT(marker);
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//![3]
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//![4]
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switch (marker->type())
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//![4]
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{
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case QLegendMarker::LegendMarkerTypeXY:
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{
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//![5]
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// Toggle visibility of series
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marker->series()->setVisible(!marker->series()->isVisible());
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// Turn legend marker back to visible, since hiding series also hides the marker
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// and we don't want it to happen now.
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marker->setVisible(true);
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//![5]
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//![6]
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// Dim the marker, if series is not visible
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qreal alpha = 1.0;
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if (!marker->series()->isVisible()) {
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alpha = 0.5;
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}
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QColor color;
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QBrush brush = marker->labelBrush();
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color = brush.color();
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color.setAlphaF(alpha);
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brush.setColor(color);
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marker->setLabelBrush(brush);
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brush = marker->brush();
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color = brush.color();
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color.setAlphaF(alpha);
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brush.setColor(color);
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marker->setBrush(brush);
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QPen pen = marker->pen();
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color = pen.color();
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color.setAlphaF(alpha);
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pen.setColor(color);
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marker->setPen(pen);
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//![6]
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break;
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}
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default:
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{
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qDebug() << "Unknown marker type";
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break;
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}
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}
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}
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