| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the Qt Data Visualization 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 |
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| ** |
| ** 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 |
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| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| #include "rainfallgraph.h" |
| #include <QtDataVisualization/qcategory3daxis.h> |
| #include <QtDataVisualization/qvalue3daxis.h> |
| #include <QtDataVisualization/q3dscene.h> |
| #include <QtDataVisualization/q3dcamera.h> |
| #include <QtDataVisualization/qbar3dseries.h> |
| #include <QtDataVisualization/q3dtheme.h> |
| #include <QtGui/QGuiApplication> |
| #include <QtGui/QFont> |
| #include <QtCore/QDebug> |
| #include <QtCore/QTextStream> |
| #include <QtCore/QFile> |
| |
| using namespace QtDataVisualization; |
| |
| RainfallGraph::RainfallGraph(Q3DBars *rainfall) |
| : m_graph(rainfall) |
| { |
| // In data file the months are in numeric format, so create custom list |
| for (int i = 1; i <= 12; i++) |
| m_numericMonths << QString::number(i); |
| |
| m_columnCount = m_numericMonths.size(); |
| |
| m_proxy = new VariantBarDataProxy; |
| QBar3DSeries *series = new QBar3DSeries(m_proxy); |
| m_graph->addSeries(series); |
| |
| updateYearsList(2000, 2012); |
| |
| // Set up bar specifications; make the bars as wide as they are deep, |
| // and add a small space between the bars |
| m_graph->setBarThickness(1.0f); |
| m_graph->setBarSpacing(QSizeF(1.1, 1.1)); |
| |
| // Set axis labels and titles |
| QStringList months; |
| months << "January" << "February" << "March" << "April" << "May" << "June" << "July" << "August" << "September" << "October" << "November" << "December"; |
| m_graph->rowAxis()->setTitle("Year"); |
| m_graph->columnAxis()->setTitle("Month"); |
| m_graph->valueAxis()->setTitle("rainfall"); |
| m_graph->valueAxis()->setLabelFormat("%d mm"); |
| m_graph->valueAxis()->setSegmentCount(5); |
| m_graph->rowAxis()->setLabels(m_years); |
| m_graph->columnAxis()->setLabels(months); |
| |
| // Set bar type to cylinder |
| series->setMesh(QAbstract3DSeries::MeshCylinder); |
| |
| // Set shadows to medium |
| m_graph->setShadowQuality(QAbstract3DGraph::ShadowQualityMedium); |
| |
| // Set selection mode to bar and column |
| m_graph->setSelectionMode(QAbstract3DGraph::SelectionItemAndColumn | QAbstract3DGraph::SelectionSlice); |
| |
| // Set theme |
| m_graph->activeTheme()->setType(Q3DTheme::ThemeArmyBlue); |
| |
| // Override font in theme |
| m_graph->activeTheme()->setFont(QFont("Century Gothic", 30)); |
| |
| // Override label background for theme |
| m_graph->activeTheme()->setLabelBackgroundEnabled(false); |
| |
| // Set camera position and zoom |
| m_graph->scene()->activeCamera()->setCameraPreset(Q3DCamera::CameraPresetIsometricRightHigh); |
| |
| // Set window title |
| m_graph->setTitle(QStringLiteral("Monthly rainfall in Northern Finland")); |
| |
| // Set reflections on |
| m_graph->setReflection(true); |
| } |
| |
| RainfallGraph::~RainfallGraph() |
| { |
| delete m_mapping; |
| delete m_dataSet; |
| delete m_graph; |
| } |
| |
| void RainfallGraph::start() |
| { |
| addDataSet(); |
| } |
| |
| void RainfallGraph::updateYearsList(int start, int end) |
| { |
| m_years.clear(); |
| for (int i = start; i <= end; i++) |
| m_years << QString::number(i); |
| |
| m_rowCount = m_years.size(); |
| } |
| |
| //! [0] |
| void RainfallGraph::addDataSet() |
| { |
| // Create a new variant data set and data item list |
| m_dataSet = new VariantDataSet; |
| VariantDataItemList *itemList = new VariantDataItemList; |
| |
| // Read data from a data file into the data item list |
| QTextStream stream; |
| QFile dataFile(":/data/raindata.txt"); |
| if (dataFile.open(QIODevice::ReadOnly | QIODevice::Text)) { |
| stream.setDevice(&dataFile); |
| while (!stream.atEnd()) { |
| QString line = stream.readLine(); |
| if (line.startsWith("#")) // Ignore comments |
| continue; |
| QStringList strList = line.split(",", QString::SkipEmptyParts); |
| // Each line has three data items: Year, month, and rainfall value |
| if (strList.size() < 3) { |
| qWarning() << "Invalid row read from data:" << line; |
| continue; |
| } |
| // Store year and month as strings, and rainfall value as double |
| // into a variant data item and add the item to the item list. |
| VariantDataItem *newItem = new VariantDataItem; |
| for (int i = 0; i < 2; i++) |
| newItem->append(strList.at(i).trimmed()); |
| newItem->append(strList.at(2).trimmed().toDouble()); |
| itemList->append(newItem); |
| } |
| } else { |
| qWarning() << "Unable to open data file:" << dataFile.fileName(); |
| } |
| |
| //! [1] |
| // Add items to the data set and set it to the proxy |
| m_dataSet->addItems(itemList); |
| m_proxy->setDataSet(m_dataSet); |
| |
| // Create new mapping for the data and set it to the proxy |
| m_mapping = new VariantBarDataMapping(0, 1, 2, m_years, m_numericMonths); |
| m_proxy->setMapping(m_mapping); |
| //! [1] |
| } |
| //! [0] |