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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 <QBarSet>
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#include <QBarSeries>
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#include <QLegend>
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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 buttons for ui
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m_buttonLayout = new QGridLayout();
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QPushButton *detachLegendButton = new QPushButton("detach legend");
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connect(detachLegendButton, SIGNAL(clicked()), this, SLOT(detachLegend()));
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m_buttonLayout->addWidget(detachLegendButton, 0, 0);
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QPushButton *attachLegendButton = new QPushButton("attach legend");
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connect(attachLegendButton, SIGNAL(clicked()), this, SLOT(attachLegend()));
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m_buttonLayout->addWidget(attachLegendButton, 1, 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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// Create chart view with the chart
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//![1]
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m_chart = new QChart();
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m_chartView = new QChartView(m_chart, this);
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m_chartView->setRubberBand(QChartView::HorizonalRubberBand);
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//![1]
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// Create custom scene and view, where detached legend will be drawn
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//![2]
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m_customView = new QGraphicsView(this);
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m_customScene = new QGraphicsScene(this);
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m_customView->setScene(m_customScene);
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//![2]
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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->addWidget(m_chartView, 0, 1, 3, 1);
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m_mainLayout->addWidget(m_customView, 0, 2, 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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//![3]
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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->legend()->setVisible(true);
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m_chart->legend()->setAlignment(Qt::AlignBottom);
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m_chart->axisY()->setNiceNumbersEnabled(true);
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m_chartView->setRenderHint(QPainter::Antialiasing);
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//![3]
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}
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void MainWidget::detachLegend()
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{
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// Detach legend from chart and
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// put legend to our custom scene
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//![4]
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QLegend *legend = m_chart->legend();
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legend->detachFromChart();
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legend->setGeometry(m_customView->rect());
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m_customScene->addItem(legend);
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//![4]
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// This forces redraw
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QSize delta(1,1);
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resize(size() + delta);
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resize(size() - delta);
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}
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void MainWidget::attachLegend()
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{
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// Remove legend from custom scene and put it back to chartview scene.
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// Attach legend back to chart, so that layout works.
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//![5]
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QLegend *legend = m_chart->legend();
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if (m_customScene->items().contains(legend)) {
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m_customScene->removeItem(legend);
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m_chartView->scene()->addItem(legend);
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legend->attachToChart();
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}
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//![5]
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// This forces redraw
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QSize delta(1,1);
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resize(size() + delta);
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resize(size() - delta);
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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->barsetCount()));
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qreal delta = m_series->barsetCount() * 0.1;
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*barSet << QPointF(0.0 + delta, 1 + delta) << QPointF(1.0 + delta, 2 + delta) << QPointF(2.0 + delta, 3 + delta) << QPointF(3.0 + 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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