mainwidget.cpp
177 lines
| 4.5 KiB
| text/x-c
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CppLexer
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r2196 | /**************************************************************************** | ||
** | ||||
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r2688 | ** Copyright (C) 2014 Digia Plc | ||
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r2196 | ** All rights reserved. | ||
** For any questions to Digia, please use contact form at http://qt.digia.com | ||||
** | ||||
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r2574 | ** This file is part of the Qt Enterprise Charts Add-on. | ||
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r2196 | ** | ||
** $QT_BEGIN_LICENSE$ | ||||
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r2574 | ** Licensees holding valid Qt Enterprise licenses may use this file in | ||
** accordance with the Qt Enterprise License Agreement provided with the | ||||
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r2196 | ** 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 "mainwidget.h" | ||||
#include <QChart> | ||||
#include <QChartView> | ||||
#include <QPushButton> | ||||
#include <QLabel> | ||||
#include <QDebug> | ||||
#include <QLegend> | ||||
#include <QFormLayout> | ||||
#include <QLegendMarker> | ||||
#include <QLineSeries> | ||||
#include <QXYLegendMarker> | ||||
#include <qmath.h> | ||||
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r2712 | QT_CHARTS_USE_NAMESPACE | ||
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r2196 | |||
MainWidget::MainWidget(QWidget *parent) : | ||||
QWidget(parent) | ||||
{ | ||||
// Create chart view with the chart | ||||
m_chart = new QChart(); | ||||
m_chartView = new QChartView(m_chart, this); | ||||
// Create layout for grid and detached legend | ||||
m_mainLayout = new QGridLayout(); | ||||
m_mainLayout->addWidget(m_chartView, 0, 1, 3, 1); | ||||
setLayout(m_mainLayout); | ||||
// Add few series | ||||
addSeries(); | ||||
addSeries(); | ||||
addSeries(); | ||||
addSeries(); | ||||
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r2313 | connectMarkers(); | ||
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r2196 | // Set the title and show legend | ||
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r2313 | m_chart->setTitle("Legendmarker example (click on legend)"); | ||
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r2196 | m_chart->legend()->setVisible(true); | ||
m_chart->legend()->setAlignment(Qt::AlignBottom); | ||||
m_chartView->setRenderHint(QPainter::Antialiasing); | ||||
} | ||||
void MainWidget::addSeries() | ||||
{ | ||||
QLineSeries *series = new QLineSeries(); | ||||
m_series.append(series); | ||||
series->setName(QString("line " + QString::number(m_series.count()))); | ||||
// Make some sine wave for data | ||||
QList<QPointF> data; | ||||
int offset = m_chart->series().count(); | ||||
for (int i = 0; i < 360; i++) { | ||||
qreal x = offset * 20 + i; | ||||
data.append(QPointF(i, qSin(2.0 * 3.141592 * x / 360.0))); | ||||
} | ||||
series->append(data); | ||||
m_chart->addSeries(series); | ||||
if (m_series.count() == 1) { | ||||
m_chart->createDefaultAxes(); | ||||
} | ||||
} | ||||
void MainWidget::removeSeries() | ||||
{ | ||||
// Remove last series from chart | ||||
if (m_series.count() > 0) { | ||||
QLineSeries *series = m_series.last(); | ||||
m_chart->removeSeries(series); | ||||
m_series.removeLast(); | ||||
delete series; | ||||
} | ||||
} | ||||
void MainWidget::connectMarkers() | ||||
{ | ||||
//![1] | ||||
// Connect all markers to handler | ||||
foreach (QLegendMarker* marker, m_chart->legend()->markers()) { | ||||
// Disconnect possible existing connection to avoid multiple connections | ||||
QObject::disconnect(marker, SIGNAL(clicked()), this, SLOT(handleMarkerClicked())); | ||||
QObject::connect(marker, SIGNAL(clicked()), this, SLOT(handleMarkerClicked())); | ||||
} | ||||
//![1] | ||||
} | ||||
void MainWidget::disconnectMarkers() | ||||
{ | ||||
//![2] | ||||
foreach (QLegendMarker* marker, m_chart->legend()->markers()) { | ||||
QObject::disconnect(marker, SIGNAL(clicked()), this, SLOT(handleMarkerClicked())); | ||||
} | ||||
//![2] | ||||
} | ||||
void MainWidget::handleMarkerClicked() | ||||
{ | ||||
//![3] | ||||
QLegendMarker* marker = qobject_cast<QLegendMarker*> (sender()); | ||||
Q_ASSERT(marker); | ||||
//![3] | ||||
//![4] | ||||
switch (marker->type()) | ||||
//![4] | ||||
{ | ||||
case QLegendMarker::LegendMarkerTypeXY: | ||||
{ | ||||
//![5] | ||||
// Toggle visibility of series | ||||
marker->series()->setVisible(!marker->series()->isVisible()); | ||||
// Turn legend marker back to visible, since hiding series also hides the marker | ||||
// and we don't want it to happen now. | ||||
marker->setVisible(true); | ||||
//![5] | ||||
//![6] | ||||
// Dim the marker, if series is not visible | ||||
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r2227 | qreal alpha = 1.0; | ||
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r2196 | |||
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r2227 | if (!marker->series()->isVisible()) { | ||
alpha = 0.5; | ||||
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r2196 | } | ||
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r2227 | QColor color; | ||
QBrush brush = marker->labelBrush(); | ||||
color = brush.color(); | ||||
color.setAlphaF(alpha); | ||||
brush.setColor(color); | ||||
marker->setLabelBrush(brush); | ||||
brush = marker->brush(); | ||||
color = brush.color(); | ||||
color.setAlphaF(alpha); | ||||
brush.setColor(color); | ||||
marker->setBrush(brush); | ||||
QPen pen = marker->pen(); | ||||
color = pen.color(); | ||||
color.setAlphaF(alpha); | ||||
pen.setColor(color); | ||||
marker->setPen(pen); | ||||
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r2196 | //![6] | ||
break; | ||||
} | ||||
default: | ||||
{ | ||||
qDebug() << "Unknown marker type"; | ||||
break; | ||||
} | ||||
} | ||||
} | ||||