view.cpp
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| text/x-c
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r0 | /**************************************************************************** | ||
| ** | ||||
| ** 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, SIGNAL(clicked(QPointF)), this, SLOT(keepCallout())); | ||||
| connect(series, SIGNAL(hovered(QPointF, bool)), this, SLOT(tooltip(QPointF,bool))); | ||||
| connect(series2, SIGNAL(clicked(QPointF)), this, SLOT(keepCallout())); | ||||
| connect(series2, SIGNAL(hovered(QPointF, bool)), this, SLOT(tooltip(QPointF,bool))); | ||||
| 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); | ||||
| } | ||||
| 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_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())); | ||||
| QXYSeries *series = qobject_cast<QXYSeries *>(sender()); | ||||
| m_tooltip->setAnchor(m_chart->mapToPosition(point, series)); | ||||
| m_tooltip->setPos(m_chart->mapToPosition(point, series) + QPoint(10, -50)); | ||||
| m_tooltip->setZValue(11); | ||||
| m_tooltip->show(); | ||||
| } else { | ||||
| m_tooltip->hide(); | ||||
| } | ||||
| } | ||||