1/****************************************************************************
2**
3** Copyright (C) 2016 The Qt Company Ltd.
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the Qt Data Visualization module of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:GPL$
9** Commercial License Usage
10** Licensees holding valid commercial Qt licenses may use this file in
11** accordance with the commercial license agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and The Qt Company. For licensing terms
14** and conditions see https://www.qt.io/terms-conditions. For further
15** information use the contact form at https://www.qt.io/contact-us.
16**
17** GNU General Public License Usage
18** Alternatively, this file may be used under the terms of the GNU
19** General Public License version 3 or (at your option) any later version
20** approved by the KDE Free Qt Foundation. The licenses are as published by
21** the Free Software Foundation and appearing in the file LICENSE.GPL3
22** included in the packaging of this file. Please review the following
23** information to ensure the GNU General Public License requirements will
24** be met: https://www.gnu.org/licenses/gpl-3.0.html.
25**
26** $QT_END_LICENSE$
27**
28****************************************************************************/
29
30#include "rainfallgraph.h"
31#include <QtDataVisualization/qcategory3daxis.h>
32#include <QtDataVisualization/qvalue3daxis.h>
33#include <QtDataVisualization/q3dscene.h>
34#include <QtDataVisualization/q3dcamera.h>
35#include <QtDataVisualization/qbar3dseries.h>
36#include <QtDataVisualization/q3dtheme.h>
37#include <QtGui/QGuiApplication>
38#include <QtGui/QFont>
39#include <QtCore/QDebug>
40#include <QtCore/QTextStream>
41#include <QtCore/QFile>
42
43using namespace QtDataVisualization;
44
45RainfallGraph::RainfallGraph(Q3DBars *rainfall)
46 : m_graph(rainfall)
47{
48 // In data file the months are in numeric format, so create custom list
49 for (int i = 1; i <= 12; i++)
50 m_numericMonths << QString::number(i);
51
52 m_columnCount = m_numericMonths.size();
53
54 m_proxy = new VariantBarDataProxy;
55 QBar3DSeries *series = new QBar3DSeries(m_proxy);
56 m_graph->addSeries(series);
57
58 updateYearsList(start: 2000, end: 2012);
59
60 // Set up bar specifications; make the bars as wide as they are deep,
61 // and add a small space between the bars
62 m_graph->setBarThickness(1.0f);
63 m_graph->setBarSpacing(QSizeF(1.1, 1.1));
64
65 // Set axis labels and titles
66 QStringList months;
67 months << "January" << "February" << "March" << "April" << "May" << "June" << "July" << "August" << "September" << "October" << "November" << "December";
68 m_graph->rowAxis()->setTitle("Year");
69 m_graph->columnAxis()->setTitle("Month");
70 m_graph->valueAxis()->setTitle("rainfall");
71 m_graph->valueAxis()->setLabelFormat("%d mm");
72 m_graph->valueAxis()->setSegmentCount(5);
73 m_graph->rowAxis()->setLabels(m_years);
74 m_graph->columnAxis()->setLabels(months);
75
76 // Set bar type to cylinder
77 series->setMesh(QAbstract3DSeries::MeshCylinder);
78
79 // Set shadows to medium
80 m_graph->setShadowQuality(QAbstract3DGraph::ShadowQualityMedium);
81
82 // Set selection mode to bar and column
83 m_graph->setSelectionMode(QAbstract3DGraph::SelectionItemAndColumn | QAbstract3DGraph::SelectionSlice);
84
85 // Set theme
86 m_graph->activeTheme()->setType(Q3DTheme::ThemeArmyBlue);
87
88 // Override font in theme
89 m_graph->activeTheme()->setFont(QFont("Century Gothic", 30));
90
91 // Override label background for theme
92 m_graph->activeTheme()->setLabelBackgroundEnabled(false);
93
94 // Set camera position and zoom
95 m_graph->scene()->activeCamera()->setCameraPreset(Q3DCamera::CameraPresetIsometricRightHigh);
96
97 // Set window title
98 m_graph->setTitle(QStringLiteral("Monthly rainfall in Northern Finland"));
99
100 // Set reflections on
101 m_graph->setReflection(true);
102}
103
104RainfallGraph::~RainfallGraph()
105{
106 delete m_mapping;
107 delete m_dataSet;
108 delete m_graph;
109}
110
111void RainfallGraph::start()
112{
113 addDataSet();
114}
115
116void RainfallGraph::updateYearsList(int start, int end)
117{
118 m_years.clear();
119 for (int i = start; i <= end; i++)
120 m_years << QString::number(i);
121
122 m_rowCount = m_years.size();
123}
124
125//! [0]
126void RainfallGraph::addDataSet()
127{
128 // Create a new variant data set and data item list
129 m_dataSet = new VariantDataSet;
130 VariantDataItemList *itemList = new VariantDataItemList;
131
132 // Read data from a data file into the data item list
133 QTextStream stream;
134 QFile dataFile(":/data/raindata.txt");
135 if (dataFile.open(flags: QIODevice::ReadOnly | QIODevice::Text)) {
136 stream.setDevice(&dataFile);
137 while (!stream.atEnd()) {
138 QString line = stream.readLine();
139 if (line.startsWith(s: "#")) // Ignore comments
140 continue;
141 QStringList strList = line.split(sep: ",", behavior: Qt::SkipEmptyParts);
142 // Each line has three data items: Year, month, and rainfall value
143 if (strList.size() < 3) {
144 qWarning() << "Invalid row read from data:" << line;
145 continue;
146 }
147 // Store year and month as strings, and rainfall value as double
148 // into a variant data item and add the item to the item list.
149 VariantDataItem *newItem = new VariantDataItem;
150 for (int i = 0; i < 2; i++)
151 newItem->append(t: strList.at(i).trimmed());
152 newItem->append(t: strList.at(i: 2).trimmed().toDouble());
153 itemList->append(t: newItem);
154 }
155 } else {
156 qWarning() << "Unable to open data file:" << dataFile.fileName();
157 }
158
159 //! [1]
160 // Add items to the data set and set it to the proxy
161 m_dataSet->addItems(itemList);
162 m_proxy->setDataSet(m_dataSet);
163
164 // Create new mapping for the data and set it to the proxy
165 m_mapping = new VariantBarDataMapping(0, 1, 2, m_years, m_numericMonths);
166 m_proxy->setMapping(m_mapping);
167 //! [1]
168}
169//! [0]
170

source code of qtdatavis3d/examples/datavisualization/customproxy/rainfallgraph.cpp