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#include "widget.h"
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#include <QGraphicsScene>
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#include <QGraphicsView>
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#include <QVBoxLayout>
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#include <QChart>
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#include <QLineSeries>
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#include <QSplineSeries>
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#include <QGraphicsTextItem>
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#include <QGraphicsLineItem>
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#include "callout.h"
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QTCOMMERCIALCHART_USE_NAMESPACE
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Widget::Widget(QWidget *parent)
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: QWidget(parent),
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m_scene(0),
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m_chart(0),
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m_view(0),
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m_tooltip(0)
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{
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// chart
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m_chart = new QChart;
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m_chart->setMinimumSize(640, 480);
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m_chart->setTitle("Hover the line to show callout. Click the line to make it stay");
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m_chart->legend()->hide();
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QLineSeries *series = new QLineSeries;
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series->append(1, 3);
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series->append(4, 5);
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series->append(5, 4.5);
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series->append(7, 1);
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series->append(11, 2);
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m_chart->addSeries(series);
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QSplineSeries *series2 = new QSplineSeries;
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series2->append(1.6, 1.4);
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series2->append(2.4, 3.5);
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series2->append(3.7, 2.5);
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series2->append(7, 4);
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series2->append(10, 2);
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m_chart->addSeries(series2);
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m_chart->createDefaultAxes();
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m_scene = new QGraphicsScene;
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m_view = new QGraphicsView(m_scene);
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m_view->setRenderHint(QPainter::Antialiasing);
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m_scene->addItem(m_chart);
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QVBoxLayout *mainLayout = new QVBoxLayout;
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mainLayout->addWidget(m_view);
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setLayout(mainLayout);
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connect(series, SIGNAL(clicked(QPointF)), this, SLOT(keepCallout()));
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connect(series, SIGNAL(hovered(QPointF, bool)), this, SLOT(tooltip(QPointF,bool)));
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connect(series2, SIGNAL(clicked(QPointF)), this, SLOT(keepCallout()));
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connect(series2, SIGNAL(hovered(QPointF, bool)), this, SLOT(tooltip(QPointF,bool)));
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}
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Widget::~Widget()
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{
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}
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void Widget::keepCallout()
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{
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m_tooltip = new Callout(m_chart);
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}
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void Widget::tooltip(QPointF point, bool state)
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{
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if (m_tooltip == 0)
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m_tooltip = new Callout(m_chart);
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if (state) {
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m_tooltip->setText(QString("X: %1 \nY: %2 ").arg(point.x()).arg(point.y()));
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QXYSeries *series = qobject_cast<QXYSeries *>(sender());
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m_tooltip->setAnchor(m_chart->mapToPosition(point, series));
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m_tooltip->setPos(m_chart->mapToPosition(point, series) + QPoint(10, -50));
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m_tooltip->setZValue(11);
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m_tooltip->show();
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} else {
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m_tooltip->hide();
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}
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}
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