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/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the Qt Charts module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:GPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3 or (at your option) any later version
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** approved by the KDE Free Qt Foundation. The licenses are as published by
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** the Free Software Foundation and appearing in the file LICENSE.GPL3
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-3.0.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "view.h"
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#include <QtGui/QResizeEvent>
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#include <QtWidgets/QGraphicsScene>
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#include <QtCharts/QChart>
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#include <QtCharts/QLineSeries>
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#include <QtCharts/QSplineSeries>
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#include <QtWidgets/QGraphicsTextItem>
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#include "callout.h"
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#include <QtGui/QMouseEvent>
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View::View(QWidget *parent)
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: QGraphicsView(new QGraphicsScene, parent),
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m_coordX(0),
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m_coordY(0),
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m_chart(0),
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m_tooltip(0)
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{
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setDragMode(QGraphicsView::NoDrag);
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setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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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_chart->setAcceptHoverEvents(true);
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setRenderHint(QPainter::Antialiasing);
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scene()->addItem(m_chart);
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m_coordX = new QGraphicsSimpleTextItem(m_chart);
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m_coordX->setPos(m_chart->size().width()/2 - 50, m_chart->size().height());
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m_coordX->setText("X: ");
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m_coordY = new QGraphicsSimpleTextItem(m_chart);
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m_coordY->setPos(m_chart->size().width()/2 + 50, m_chart->size().height());
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m_coordY->setText("Y: ");
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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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this->setMouseTracking(true);
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}
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void View::resizeEvent(QResizeEvent *event)
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{
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if (scene()) {
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scene()->setSceneRect(QRect(QPoint(0, 0), event->size()));
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m_chart->resize(event->size());
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m_coordX->setPos(m_chart->size().width()/2 - 50, m_chart->size().height() - 20);
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m_coordY->setPos(m_chart->size().width()/2 + 50, m_chart->size().height() - 20);
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}
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QGraphicsView::resizeEvent(event);
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}
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void View::mouseMoveEvent(QMouseEvent *event)
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{
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m_coordX->setText(QString("X: %1").arg(m_chart->mapToValue(event->pos()).x()));
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m_coordY->setText(QString("Y: %1").arg(m_chart->mapToValue(event->pos()).y()));
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QGraphicsView::mouseMoveEvent(event);
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}
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void View::keepCallout()
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{
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m_tooltip = new Callout(m_chart);
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}
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void View::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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