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29 | |
30 | #include "customformatter.h" |
31 | #include <QtDataVisualization/QValue3DAxis> |
32 | #include <QtQml/QQmlExtensionPlugin> |
33 | #include <QtCore/QDebug> |
34 | |
35 | using namespace QtDataVisualization; |
36 | |
37 | Q_DECLARE_METATYPE(QValue3DAxisFormatter *) |
38 | |
39 | static const qreal oneDayMs = 60.0 * 60.0 * 24.0 * 1000.0; |
40 | |
41 | CustomFormatter::CustomFormatter(QObject *parent) : |
42 | QValue3DAxisFormatter(parent) |
43 | { |
44 | qRegisterMetaType<QValue3DAxisFormatter *>(); |
45 | } |
46 | |
47 | CustomFormatter::~CustomFormatter() |
48 | { |
49 | } |
50 | |
51 | //! [1] |
52 | QValue3DAxisFormatter *CustomFormatter::createNewInstance() const |
53 | { |
54 | return new CustomFormatter(); |
55 | } |
56 | |
57 | void CustomFormatter::populateCopy(QValue3DAxisFormatter ©) const |
58 | { |
59 | QValue3DAxisFormatter::populateCopy(copy); |
60 | |
61 | CustomFormatter *customFormatter = static_cast<CustomFormatter *>(©); |
62 | customFormatter->m_originDate = m_originDate; |
63 | customFormatter->m_selectionFormat = m_selectionFormat; |
64 | } |
65 | //! [1] |
66 | |
67 | //! [2] |
68 | void CustomFormatter::recalculate() |
69 | { |
70 | // We want our axis to always have gridlines at date breaks |
71 | |
72 | // Convert range into QDateTimes |
73 | QDateTime minTime = valueToDateTime(value: qreal(axis()->min())); |
74 | QDateTime maxTime = valueToDateTime(value: qreal(axis()->max())); |
75 | |
76 | // Find out the grid counts |
77 | QTime midnight(0, 0); |
78 | QDateTime minFullDate(minTime.date(), midnight); |
79 | int gridCount = 0; |
80 | if (minFullDate != minTime) |
81 | minFullDate = minFullDate.addDays(days: 1); |
82 | QDateTime maxFullDate(maxTime.date(), midnight); |
83 | |
84 | gridCount += minFullDate.daysTo(maxFullDate) + 1; |
85 | int subGridCount = axis()->subSegmentCount() - 1; |
86 | |
87 | // Reserve space for position arrays and label strings |
88 | gridPositions().resize(asize: gridCount); |
89 | subGridPositions().resize(asize: (gridCount + 1) * subGridCount); |
90 | labelPositions().resize(asize: gridCount); |
91 | labelStrings().reserve(alloc: gridCount); |
92 | |
93 | // Calculate positions and format labels |
94 | qint64 startMs = minTime.toMSecsSinceEpoch(); |
95 | qint64 endMs = maxTime.toMSecsSinceEpoch(); |
96 | qreal dateNormalizer = endMs - startMs; |
97 | qreal firstLineOffset = (minFullDate.toMSecsSinceEpoch() - startMs) / dateNormalizer; |
98 | qreal segmentStep = oneDayMs / dateNormalizer; |
99 | qreal subSegmentStep = 0; |
100 | if (subGridCount > 0) |
101 | subSegmentStep = segmentStep / qreal(subGridCount + 1); |
102 | |
103 | for (int i = 0; i < gridCount; i++) { |
104 | qreal gridValue = firstLineOffset + (segmentStep * qreal(i)); |
105 | gridPositions()[i] = float(gridValue); |
106 | labelPositions()[i] = float(gridValue); |
107 | labelStrings() << minFullDate.addDays(days: i).toString(format: axis()->labelFormat()); |
108 | } |
109 | |
110 | for (int i = 0; i <= gridCount; i++) { |
111 | if (subGridPositions().size()) { |
112 | for (int j = 0; j < subGridCount; j++) { |
113 | float position; |
114 | if (i) |
115 | position = gridPositions().at(i: i - 1) + subSegmentStep * (j + 1); |
116 | else |
117 | position = gridPositions().at(i: 0) - segmentStep + subSegmentStep * (j + 1); |
118 | if (position > 1.0f || position < 0.0f) |
119 | position = gridPositions().at(i: 0); |
120 | subGridPositions()[i * subGridCount + j] = position; |
121 | } |
122 | } |
123 | } |
124 | } |
125 | //! [2] |
126 | |
127 | //! [3] |
128 | QString CustomFormatter::stringForValue(qreal value, const QString &format) const |
129 | { |
130 | Q_UNUSED(format) |
131 | |
132 | return valueToDateTime(value).toString(format: m_selectionFormat); |
133 | } |
134 | //! [3] |
135 | |
136 | QDate CustomFormatter::originDate() const |
137 | { |
138 | return m_originDate; |
139 | } |
140 | |
141 | QString CustomFormatter::selectionFormat() const |
142 | { |
143 | return m_selectionFormat; |
144 | } |
145 | |
146 | void CustomFormatter::setOriginDate(const QDate &date) |
147 | { |
148 | if (m_originDate != date) { |
149 | m_originDate = date; |
150 | markDirty(labelsChange: true); |
151 | emit originDateChanged(date); |
152 | } |
153 | } |
154 | |
155 | void CustomFormatter::setSelectionFormat(const QString &format) |
156 | { |
157 | if (m_selectionFormat != format) { |
158 | m_selectionFormat = format; |
159 | markDirty(labelsChange: true); // Necessary to regenerate already visible selection label |
160 | emit selectionFormatChanged(format); |
161 | } |
162 | } |
163 | |
164 | //! [0] |
165 | QDateTime CustomFormatter::valueToDateTime(qreal value) const |
166 | { |
167 | return m_originDate.startOfDay().addMSecs(msecs: qint64(oneDayMs * value)); |
168 | } |
169 | //! [0] |
170 |