1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
|
/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Charts 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
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** 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
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <private/chartvalueaxisy_p.h>
#include <QtCharts/QAbstractAxis>
#include <private/chartpresenter_p.h>
#include <QtCharts/QValueAxis>
#include <private/abstractchartlayout_p.h>
#include <QtWidgets/QGraphicsLayout>
#include <QtCore/QtMath>
#include <QtCore/QDebug>
QT_CHARTS_BEGIN_NAMESPACE
ChartValueAxisY::ChartValueAxisY(QValueAxis *axis, QGraphicsItem *item)
: VerticalAxis(axis, item),
m_axis(axis)
{
QObject::connect(m_axis, SIGNAL(tickCountChanged(int)), this, SLOT(handleTickCountChanged(int)));
QObject::connect(m_axis, SIGNAL(minorTickCountChanged(int)),
this, SLOT(handleMinorTickCountChanged(int)));
QObject::connect(m_axis, SIGNAL(labelFormatChanged(QString)), this, SLOT(handleLabelFormatChanged(QString)));
QObject::connect(m_axis, SIGNAL(tickIntervalChanged(qreal)), this, SLOT(handleTickIntervalChanged(qreal)));
QObject::connect(m_axis, SIGNAL(tickAnchorChanged(qreal)), this, SLOT(handleTickAnchorChanged(qreal)));
QObject::connect(m_axis, SIGNAL(tickTypeChanged(QValueAxis::TickType)), this,
SLOT(handleTickTypeChanged(QValueAxis::TickType)));
}
ChartValueAxisY::~ChartValueAxisY()
{
}
QVector<qreal> ChartValueAxisY::calculateLayout() const
{
if (m_axis->tickType() == QValueAxis::TicksFixed) {
int tickCount = m_axis->tickCount();
Q_ASSERT(tickCount >= 2);
QVector<qreal> points;
points.resize(tickCount);
const QRectF &gridRect = gridGeometry();
const qreal deltaY = gridRect.height() / (qreal(tickCount) - 1.0);
for (int i = 0; i < tickCount; ++i)
points[i] = qreal(i) * -deltaY + gridRect.bottom();
return points;
} else {
const qreal interval = m_axis->tickInterval();
qreal value = m_axis->tickAnchor();
const qreal maxValue = max();
const qreal minValue = min();
// Find the first major tick right after the min of range
if (value > minValue)
value = value - int((value - minValue) / interval) * interval;
else
value = value + qCeil((minValue - value) / interval) * interval;
const QRectF &gridRect = gridGeometry();
const qreal deltaY = gridRect.height() / (maxValue - minValue);
QVector<qreal> points;
const qreal bottomPos = gridRect.bottom();
while (value <= maxValue || qFuzzyCompare(value, maxValue)) {
points << (value - minValue) * -deltaY + bottomPos;
value += interval;
}
return points;
}
}
void ChartValueAxisY::updateGeometry()
{
const QVector<qreal> &layout = ChartAxisElement::layout();
const QVector<qreal>& dynamicMinorTicklayout = ChartAxisElement::dynamicMinorTicklayout();
if (layout.isEmpty() && dynamicMinorTicklayout.isEmpty())
return;
setLabels(createValueLabels(min(), max(), layout.size(), m_axis->tickInterval(),
m_axis->tickAnchor(), m_axis->tickType(), m_axis->labelFormat()));
VerticalAxis::updateGeometry();
}
void ChartValueAxisY::handleTickCountChanged(int tick)
{
Q_UNUSED(tick);
QGraphicsLayoutItem::updateGeometry();
if (presenter()) presenter()->layout()->invalidate();
}
void ChartValueAxisY::handleMinorTickCountChanged(int tick)
{
Q_UNUSED(tick);
QGraphicsLayoutItem::updateGeometry();
if (presenter())
presenter()->layout()->invalidate();
}
void ChartValueAxisY::handleLabelFormatChanged(const QString &format)
{
Q_UNUSED(format);
QGraphicsLayoutItem::updateGeometry();
if (presenter()) presenter()->layout()->invalidate();
}
void ChartValueAxisY::handleTickIntervalChanged(qreal interval)
{
Q_UNUSED(interval)
QGraphicsLayoutItem::updateGeometry();
if (presenter()) presenter()->layout()->invalidate();
}
void ChartValueAxisY::handleTickAnchorChanged(qreal anchor)
{
Q_UNUSED(anchor)
QGraphicsLayoutItem::updateGeometry();
if (presenter()) presenter()->layout()->invalidate();
}
void ChartValueAxisY::handleTickTypeChanged(QValueAxis::TickType type)
{
Q_UNUSED(type)
QGraphicsLayoutItem::updateGeometry();
if (presenter()) presenter()->layout()->invalidate();
}
QSizeF ChartValueAxisY::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
{
Q_UNUSED(constraint)
QSizeF sh;
QSizeF base = VerticalAxis::sizeHint(which, constraint);
QStringList ticksList = createValueLabels(min(), max(), m_axis->tickCount(),
m_axis->tickInterval(), m_axis->tickAnchor(),
m_axis->tickType(), m_axis->labelFormat());
qreal width = 0;
// Height of vertical axis sizeHint indicates the maximum distance labels can extend past
// first and last ticks. Base height is irrelevant.
qreal height = 0;
switch (which) {
case Qt::MinimumSize: {
QRectF boundingRect = ChartPresenter::textBoundingRect(axis()->labelsFont(),
QStringLiteral("..."),
axis()->labelsAngle());
width = boundingRect.width() + labelPadding() + base.width() + 1.0;
height = boundingRect.height() / 2.0;
sh = QSizeF(width, height);
break;
}
case Qt::PreferredSize: {
qreal labelWidth = 0.0;
qreal firstHeight = -1.0;
foreach (const QString& s, ticksList) {
QRectF rect = ChartPresenter::textBoundingRect(axis()->labelsFont(), s, axis()->labelsAngle());
labelWidth = qMax(rect.width(), labelWidth);
height = rect.height();
if (firstHeight < 0.0)
firstHeight = height;
}
width = labelWidth + labelPadding() + base.width() + 2.0; //two pixels of tolerance
height = qMax(height, firstHeight) / 2.0;
sh = QSizeF(width, height);
break;
}
default:
break;
}
return sh;
}
#include "moc_chartvalueaxisy_p.cpp"
QT_CHARTS_END_NAMESPACE
|
