| /**************************************************************************** |
| ** |
| ** 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 "chartview.h" |
| #include <QtGui/QMouseEvent> |
| #include <QtCore/QDebug> |
| #include <QtCharts/QAbstractAxis> |
| #include <QtCharts/QValueAxis> |
| |
| QT_CHARTS_USE_NAMESPACE |
| |
| ChartView::ChartView(QWidget *parent) |
| : QChartView(parent) |
| { |
| } |
| |
| //![1] |
| void ChartView::keyPressEvent(QKeyEvent *event) |
| { |
| switch (event->key()) { |
| case Qt::Key_Plus: |
| chart()->zoomIn(); |
| break; |
| case Qt::Key_Minus: |
| chart()->zoomOut(); |
| break; |
| case Qt::Key_Left: |
| chart()->scroll(-1.0, 0); |
| break; |
| case Qt::Key_Right: |
| chart()->scroll(1.0, 0); |
| break; |
| case Qt::Key_Up: |
| chart()->scroll(0, 1.0); |
| break; |
| case Qt::Key_Down: |
| chart()->scroll(0, -1.0); |
| break; |
| case Qt::Key_Space: |
| switchChartType(); |
| break; |
| default: |
| QGraphicsView::keyPressEvent(event); |
| break; |
| } |
| } |
| //![1] |
| |
| //![2] |
| void ChartView::switchChartType() |
| { |
| QChart *newChart; |
| QChart *oldChart = chart(); |
| |
| if (oldChart->chartType() == QChart::ChartTypeCartesian) |
| newChart = new QPolarChart(); |
| else |
| newChart = new QChart(); |
| |
| // Move series and axes from old chart to new one |
| const QList<QAbstractSeries *> seriesList = oldChart->series(); |
| const QList<QAbstractAxis *> axisList = oldChart->axes(); |
| QList<QPair<qreal, qreal> > axisRanges; |
| |
| for (QAbstractAxis *axis : axisList) { |
| QValueAxis *valueAxis = static_cast<QValueAxis *>(axis); |
| axisRanges.append(QPair<qreal, qreal>(valueAxis->min(), valueAxis->max())); |
| } |
| |
| for (QAbstractSeries *series : seriesList) |
| oldChart->removeSeries(series); |
| |
| for (QAbstractAxis *axis : axisList) { |
| oldChart->removeAxis(axis); |
| newChart->addAxis(axis, axis->alignment()); |
| } |
| |
| for (QAbstractSeries *series : seriesList) { |
| newChart->addSeries(series); |
| for (QAbstractAxis *axis : axisList) |
| series->attachAxis(axis); |
| } |
| |
| int count = 0; |
| for (QAbstractAxis *axis : axisList) { |
| axis->setRange(axisRanges[count].first, axisRanges[count].second); |
| count++; |
| } |
| |
| newChart->setTitle(oldChart->title()); |
| setChart(newChart); |
| delete oldChart; |
| } |
| //![2] |