calloutview.cpp - mozsearch

Enable keyboard shortcuts

// Copyright (C) 2023 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause

#include "callout.h"

#include "calloutview.h"

#include <QChart>

#include <QGraphicsLayout>

#include <QGraphicsScene>

#include <QGraphicsTextItem>

#include <QGraphicsView>

#include <QLineSeries>

#include <QMouseEvent>

#include <QSplineSeries>

#include <QResizeEvent>

CalloutView::CalloutView(QWidget *parent)

    : QGraphicsView(new QGraphicsScene, parent)

    setDragMode(QGraphicsView::NoDrag);

    setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);

    setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);

    setFrameShape(QFrame::NoFrame);

    setBackgroundRole(QPalette::Window);

    setRenderHint(QPainter::Antialiasing);

    setMouseTracking(true);

    m_chart = new QChart;

    m_chart->setTitle("Hover the line to show callout. Click the line to make it stay.");

    m_chart->legend()->hide();

    auto series = new QLineSeries;

    series->append(1, 3);

    series->append(4, 5);

    series->append(5, 4.5);

    series->append(7, 1);

    series->append(11, 2);

    m_chart->addSeries(series);

    auto series2 = new QSplineSeries;

    series2->append(1.6, 1.4);

    series2->append(2.4, 3.5);

    series2->append(3.7, 2.5);

    series2->append(7, 4);

    series2->append(10, 2);

    m_chart->addSeries(series2);

    m_chart->createDefaultAxes();

    m_chart->setAcceptHoverEvents(true);

    scene()->addItem(m_chart);

    m_coordX = new QGraphicsSimpleTextItem(m_chart);

    m_coordX->setText("X: ");

    m_coordY = new QGraphicsSimpleTextItem(m_chart);

    m_coordY->setText("Y: ");

    connect(series, &QLineSeries::clicked, this, &CalloutView::keepCallout);

    connect(series, &QLineSeries::hovered, this, &CalloutView::tooltip);

    connect(series2, &QSplineSeries::clicked, this, &CalloutView::keepCallout);

    connect(series2, &QSplineSeries::hovered, this, &CalloutView::tooltip);

CalloutView::~CalloutView()

    delete scene();

void CalloutView::resizeEvent(QResizeEvent *event)

    if (scene()) {

        scene()->setSceneRect(QRect(QPoint(0, 0), event->size()));

        m_chart->resize(event->size());

        m_coordX->setPos(m_chart->size().width() / 2 - 70, m_chart->size().height() - 24);

        m_coordY->setPos(m_chart->size().width() / 2 + 30, m_chart->size().height() - 24);

        const auto callouts = m_callouts;

        for (Callout *callout : callouts)

            callout->updateGeometry();

    resize(size());

void CalloutView::mouseMoveEvent(QMouseEvent *event)

    m_coordX->setText(QString("X: %1").arg(m_chart->mapToValue(event->pos()).x()));

    m_coordY->setText(QString("Y: %1").arg(m_chart->mapToValue(event->pos()).y()));

    QGraphicsView::mouseMoveEvent(event);

void CalloutView::keepCallout()

    m_callouts.append(m_tooltip);

    m_tooltip = new Callout(m_chart);

void CalloutView::tooltip(QPointF point, bool state)

    if (!m_tooltip)

        m_tooltip = new Callout(m_chart);

    if (state) {

        m_tooltip->setText(QString("X: %1 \nY: %2 ").arg(point.x()).arg(point.y()));

        m_tooltip->setAnchor(point);

        m_tooltip->setZValue(11);

        m_tooltip->updateGeometry();

        m_tooltip->show();

    } else {

        m_tooltip->hide();