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/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd
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** All rights reserved.
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** For any questions to The Qt Company, please use contact form at http://qt.io
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**
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** This file is part of the Qt Charts module.
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**
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** Licensees holding valid commercial license for Qt may use this file in
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** accordance with the Qt License Agreement provided with the Software
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** or, alternatively, in accordance with the terms contained in a written
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** agreement between you and The Qt Company.
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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.io
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**
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****************************************************************************/
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#include "mainwidget.h"
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#include <QtCharts/QChart>
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#include <QtCharts/QChartView>
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#include <QtWidgets/QPushButton>
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#include <QtWidgets/QLabel>
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#include <QtCore/QDebug>
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#include <QtCharts/QBarSet>
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#include <QtCharts/QBarSeries>
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#include <QtCharts/QLegend>
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#include <QtWidgets/QFormLayout>
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QT_CHARTS_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 buttons for ui
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m_buttonLayout = new QGridLayout();
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QPushButton *detachLegendButton = new QPushButton("Toggle attached");
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connect(detachLegendButton, SIGNAL(clicked()), this, SLOT(toggleAttached()));
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m_buttonLayout->addWidget(detachLegendButton, 0, 0);
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QPushButton *addSetButton = new QPushButton("add barset");
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connect(addSetButton, SIGNAL(clicked()), this, SLOT(addBarset()));
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m_buttonLayout->addWidget(addSetButton, 2, 0);
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QPushButton *removeBarsetButton = new QPushButton("remove barset");
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connect(removeBarsetButton, SIGNAL(clicked()), this, SLOT(removeBarset()));
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m_buttonLayout->addWidget(removeBarsetButton, 3, 0);
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QPushButton *alignButton = new QPushButton("Align (Bottom)");
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connect(alignButton, SIGNAL(clicked()), this, SLOT(setLegendAlignment()));
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m_buttonLayout->addWidget(alignButton, 4, 0);
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QPushButton *boldButton = new QPushButton("Toggle bold");
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connect(boldButton, SIGNAL(clicked()), this, SLOT(toggleBold()));
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m_buttonLayout->addWidget(boldButton, 8, 0);
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QPushButton *italicButton = new QPushButton("Toggle italic");
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connect(italicButton, SIGNAL(clicked()), this, SLOT(toggleItalic()));
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m_buttonLayout->addWidget(italicButton, 9, 0);
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m_legendPosX = new QDoubleSpinBox();
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m_legendPosY = new QDoubleSpinBox();
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m_legendWidth = new QDoubleSpinBox();
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m_legendHeight = new QDoubleSpinBox();
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connect(m_legendPosX, SIGNAL(valueChanged(double)), this, SLOT(updateLegendLayout()));
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connect(m_legendPosY, SIGNAL(valueChanged(double)), this, SLOT(updateLegendLayout()));
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connect(m_legendWidth, SIGNAL(valueChanged(double)), this, SLOT(updateLegendLayout()));
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connect(m_legendHeight, SIGNAL(valueChanged(double)), this, SLOT(updateLegendLayout()));
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QFormLayout *legendLayout = new QFormLayout();
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legendLayout->addRow("HPos", m_legendPosX);
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legendLayout->addRow("VPos", m_legendPosY);
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legendLayout->addRow("Width", m_legendWidth);
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legendLayout->addRow("Height", m_legendHeight);
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m_legendSettings = new QGroupBox("Detached legend");
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m_legendSettings->setLayout(legendLayout);
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m_buttonLayout->addWidget(m_legendSettings);
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m_legendSettings->setVisible(false);
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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 spinbox to modify font size
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m_fontSize = new QDoubleSpinBox();
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m_fontSize->setValue(m_chart->legend()->font().pointSizeF());
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connect(m_fontSize, SIGNAL(valueChanged(double)), this, SLOT(fontSizeChanged()));
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QFormLayout *fontLayout = new QFormLayout();
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fontLayout->addRow("Legend font size", m_fontSize);
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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->addLayout(m_buttonLayout, 0, 0);
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m_mainLayout->addLayout(fontLayout, 1, 0);
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m_mainLayout->addWidget(m_chartView, 0, 1, 3, 1);
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setLayout(m_mainLayout);
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createSeries();
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}
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void MainWidget::createSeries()
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{
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m_series = new QBarSeries();
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addBarset();
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addBarset();
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addBarset();
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addBarset();
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m_chart->addSeries(m_series);
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m_chart->setTitle("Legend detach example");
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m_chart->createDefaultAxes();
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//![1]
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m_chart->legend()->setVisible(true);
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m_chart->legend()->setAlignment(Qt::AlignBottom);
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//![1]
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m_chartView->setRenderHint(QPainter::Antialiasing);
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}
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void MainWidget::showLegendSpinbox()
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{
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m_legendSettings->setVisible(true);
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QRectF chartViewRect = m_chartView->rect();
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m_legendPosX->setMinimum(0);
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m_legendPosX->setMaximum(chartViewRect.width());
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m_legendPosX->setValue(150);
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m_legendPosY->setMinimum(0);
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m_legendPosY->setMaximum(chartViewRect.height());
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m_legendPosY->setValue(150);
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m_legendWidth->setMinimum(0);
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m_legendWidth->setMaximum(chartViewRect.width());
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m_legendWidth->setValue(150);
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m_legendHeight->setMinimum(0);
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m_legendHeight->setMaximum(chartViewRect.height());
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m_legendHeight->setValue(75);
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}
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void MainWidget::hideLegendSpinbox()
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{
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m_legendSettings->setVisible(false);
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}
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void MainWidget::toggleAttached()
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{
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QLegend *legend = m_chart->legend();
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if (legend->isAttachedToChart()) {
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//![2]
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legend->detachFromChart();
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m_chart->legend()->setBackgroundVisible(true);
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m_chart->legend()->setBrush(QBrush(QColor(128, 128, 128, 128)));
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m_chart->legend()->setPen(QPen(QColor(192, 192, 192, 192)));
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//![2]
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showLegendSpinbox();
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updateLegendLayout();
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} else {
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//![3]
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legend->attachToChart();
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legend->setBackgroundVisible(false);
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//![3]
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hideLegendSpinbox();
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}
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update();
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}
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void MainWidget::addBarset()
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{
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QBarSet *barSet = new QBarSet(QString("set ") + QString::number(m_series->count()));
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qreal delta = m_series->count() * 0.1;
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*barSet << 1 + delta << 2 + delta << 3 + delta << 4 + delta;
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m_series->append(barSet);
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}
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void MainWidget::removeBarset()
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{
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QList<QBarSet *> sets = m_series->barSets();
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if (sets.count() > 0) {
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m_series->remove(sets.at(sets.count() - 1));
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}
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}
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void MainWidget::setLegendAlignment()
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{
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QPushButton *button = qobject_cast<QPushButton *>(sender());
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switch (m_chart->legend()->alignment()) {
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case Qt::AlignTop:
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m_chart->legend()->setAlignment(Qt::AlignLeft);
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if (button)
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button->setText("Align (Left)");
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break;
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case Qt::AlignLeft:
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m_chart->legend()->setAlignment(Qt::AlignBottom);
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if (button)
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button->setText("Align (Bottom)");
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break;
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case Qt::AlignBottom:
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m_chart->legend()->setAlignment(Qt::AlignRight);
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if (button)
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button->setText("Align (Right)");
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break;
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default:
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if (button)
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button->setText("Align (Top)");
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m_chart->legend()->setAlignment(Qt::AlignTop);
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break;
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}
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}
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void MainWidget::toggleBold()
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{
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QFont font = m_chart->legend()->font();
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font.setBold(!font.bold());
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m_chart->legend()->setFont(font);
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}
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void MainWidget::toggleItalic()
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{
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QFont font = m_chart->legend()->font();
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font.setItalic(!font.italic());
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m_chart->legend()->setFont(font);
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}
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void MainWidget::fontSizeChanged()
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{
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QFont font = m_chart->legend()->font();
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font.setPointSizeF(m_fontSize->value());
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m_chart->legend()->setFont(font);
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}
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void MainWidget::updateLegendLayout()
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{
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//![4]
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m_chart->legend()->setGeometry(QRectF(m_legendPosX->value(),
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m_legendPosY->value(),
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m_legendWidth->value(),
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m_legendHeight->value()));
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m_chart->legend()->update();
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//![4]
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}
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