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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 | |
43 | using namespace QtDataVisualization; |
44 | |
45 | RainfallGraph::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 | |
104 | RainfallGraph::~RainfallGraph() |
105 | { |
106 | delete m_mapping; |
107 | delete m_dataSet; |
108 | delete m_graph; |
109 | } |
110 | |
111 | void RainfallGraph::start() |
112 | { |
113 | addDataSet(); |
114 | } |
115 | |
116 | void 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] |
126 | void 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 | |