| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the Qt Charts module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:GPL$ |
| ** Commercial License Usage |
| ** Licensees holding valid commercial Qt licenses may use this file in |
| ** accordance with the commercial license agreement provided with the |
| ** Software or, alternatively, in accordance with the terms contained in |
| ** a written agreement between you and The Qt Company. For licensing terms |
| ** and conditions see https://www.qt.io/terms-conditions. For further |
| ** information use the contact form at https://www.qt.io/contact-us. |
| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU |
| ** General Public License version 3 or (at your option) any later version |
| ** approved by the KDE Free Qt Foundation. The licenses are as published by |
| ** the Free Software Foundation and appearing in the file LICENSE.GPL3 |
| ** included in the packaging of this file. Please review the following |
| ** information to ensure the GNU General Public License requirements will |
| ** be met: https://www.gnu.org/licenses/gpl-3.0.html. |
| ** |
| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| #include "view.h" |
| #include <QtGui/QResizeEvent> |
| #include <QtWidgets/QGraphicsScene> |
| #include <QtCharts/QChart> |
| #include <QtCharts/QLineSeries> |
| #include <QtCharts/QSplineSeries> |
| #include <QtWidgets/QGraphicsTextItem> |
| #include "callout.h" |
| #include <QtGui/QMouseEvent> |
| |
| View::View(QWidget *parent) |
| : QGraphicsView(new QGraphicsScene, parent), |
| m_coordX(0), |
| m_coordY(0), |
| m_chart(0), |
| m_tooltip(0) |
| { |
| setDragMode(QGraphicsView::NoDrag); |
| setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff); |
| setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff); |
| |
| // chart |
| m_chart = new QChart; |
| m_chart->setMinimumSize(640, 480); |
| m_chart->setTitle("Hover the line to show callout. Click the line to make it stay"); |
| m_chart->legend()->hide(); |
| QLineSeries *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); |
| |
| QSplineSeries *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); |
| |
| setRenderHint(QPainter::Antialiasing); |
| scene()->addItem(m_chart); |
| |
| m_coordX = new QGraphicsSimpleTextItem(m_chart); |
| m_coordX->setPos(m_chart->size().width()/2 - 50, m_chart->size().height()); |
| m_coordX->setText("X: "); |
| m_coordY = new QGraphicsSimpleTextItem(m_chart); |
| m_coordY->setPos(m_chart->size().width()/2 + 50, m_chart->size().height()); |
| m_coordY->setText("Y: "); |
| |
| connect(series, &QLineSeries::clicked, this, &View::keepCallout); |
| connect(series, &QLineSeries::hovered, this, &View::tooltip); |
| |
| connect(series2, &QSplineSeries::clicked, this, &View::keepCallout); |
| connect(series2, &QSplineSeries::hovered, this, &View::tooltip); |
| |
| this->setMouseTracking(true); |
| } |
| |
| void View::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 - 50, m_chart->size().height() - 20); |
| m_coordY->setPos(m_chart->size().width()/2 + 50, m_chart->size().height() - 20); |
| const auto callouts = m_callouts; |
| for (Callout *callout : callouts) |
| callout->updateGeometry(); |
| } |
| QGraphicsView::resizeEvent(event); |
| } |
| |
| void View::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 View::keepCallout() |
| { |
| m_callouts.append(m_tooltip); |
| m_tooltip = new Callout(m_chart); |
| } |
| |
| void View::tooltip(QPointF point, bool state) |
| { |
| if (m_tooltip == 0) |
| 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(); |
| } |
| } |