1 | // Copyright (C) 2016 The Qt Company Ltd. |
2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only |
3 | |
4 | #include <private/chartcategoryaxisy_p.h> |
5 | #include <QtCharts/QCategoryAxis> |
6 | #include <QtCharts/QAbstractAxis> |
7 | #include <private/chartpresenter_p.h> |
8 | #include <private/abstractchartlayout_p.h> |
9 | #include <QtWidgets/QGraphicsLayout> |
10 | #include <QtCore/QtMath> |
11 | #include <QtCore/QDebug> |
12 | |
13 | QT_BEGIN_NAMESPACE |
14 | |
15 | ChartCategoryAxisY::ChartCategoryAxisY(QCategoryAxis *axis, QGraphicsItem* item) |
16 | : VerticalAxis(axis, item, true), |
17 | m_axis(axis) |
18 | { |
19 | QObject::connect(sender: axis, SIGNAL(categoriesChanged()), receiver: this, SLOT(handleCategoriesChanged())); |
20 | } |
21 | |
22 | ChartCategoryAxisY::~ChartCategoryAxisY() |
23 | { |
24 | } |
25 | |
26 | QList<qreal> ChartCategoryAxisY::calculateLayout() const |
27 | { |
28 | int tickCount = m_axis->categoriesLabels().size() + 1; |
29 | QList<qreal> points; |
30 | |
31 | if (tickCount < 2) |
32 | return points; |
33 | |
34 | const QRectF &gridRect = gridGeometry(); |
35 | qreal range = max() - min(); |
36 | if (range > 0) { |
37 | points.resize(size: tickCount); |
38 | qreal scale = gridRect.height() / range; |
39 | for (int i = 0; i < tickCount; ++i) { |
40 | if (i < tickCount - 1) { |
41 | qreal y = -(m_axis->startValue(categoryLabel: m_axis->categoriesLabels().at(i)) - min()) * scale + gridRect.bottom(); |
42 | points[i] = y; |
43 | } else { |
44 | qreal y = -(m_axis->endValue(categoryLabel: m_axis->categoriesLabels().at(i: i - 1)) - min()) * scale + gridRect.bottom(); |
45 | points[i] = y; |
46 | } |
47 | } |
48 | } |
49 | |
50 | return points; |
51 | } |
52 | |
53 | void ChartCategoryAxisY::updateGeometry() |
54 | { |
55 | setLabels(m_axis->categoriesLabels() << QString()); |
56 | VerticalAxis::updateGeometry(); |
57 | } |
58 | |
59 | QSizeF ChartCategoryAxisY::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const |
60 | { |
61 | Q_UNUSED(constraint); |
62 | |
63 | QSizeF sh; |
64 | QSizeF base = VerticalAxis::sizeHint(which, constraint); |
65 | QStringList ticksList = m_axis->categoriesLabels(); |
66 | qreal width = 0; |
67 | qreal height = 0; // Height is irrelevant for Y axes with interval labels |
68 | |
69 | switch (which) { |
70 | case Qt::MinimumSize: { |
71 | if (labelsVisible()) { |
72 | QRectF boundingRect = ChartPresenter::textBoundingRect(font: axis()->labelsFont(), |
73 | QStringLiteral("..." ), |
74 | angle: axis()->labelsAngle()); |
75 | width = boundingRect.width() + labelPadding() + base.width() + 1.0; |
76 | } else { |
77 | width = base.width() + 1.0; |
78 | } |
79 | sh = QSizeF(width, height); |
80 | break; |
81 | } |
82 | case Qt::PreferredSize: { |
83 | if (labelsVisible()) { |
84 | qreal labelWidth = 0.0; |
85 | foreach (const QString& s, ticksList) { |
86 | QRectF rect = ChartPresenter::textBoundingRect(font: axis()->labelsFont(), text: s, angle: axis()->labelsAngle()); |
87 | labelWidth = qMax(a: rect.width(), b: labelWidth); |
88 | } |
89 | width = labelWidth + labelPadding() + base.width() + 1.0; |
90 | } else { |
91 | width = base.width() + 1.0; |
92 | } |
93 | sh = QSizeF(width, height); |
94 | break; |
95 | } |
96 | default: |
97 | break; |
98 | } |
99 | return sh; |
100 | } |
101 | |
102 | void ChartCategoryAxisY::handleCategoriesChanged() |
103 | { |
104 | QGraphicsLayoutItem::updateGeometry(); |
105 | presenter()->layout()->invalidate(); |
106 | } |
107 | |
108 | QT_END_NAMESPACE |
109 | |
110 | #include "moc_chartcategoryaxisy_p.cpp" |
111 | |