chartbarcategoryaxisy.cpp
151 lines
| 5.0 KiB
| text/x-c
|
CppLexer
|
r0 | /**************************************************************************** | ||
** | ||||
** 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/chartbarcategoryaxisy_p.h> | ||||
#include <private/chartpresenter_p.h> | ||||
#include <private/qbarcategoryaxis_p.h> | ||||
#include <private/abstractchartlayout_p.h> | ||||
#include <QtCore/QtMath> | ||||
#include <QtCore/QDebug> | ||||
QT_CHARTS_BEGIN_NAMESPACE | ||||
ChartBarCategoryAxisY::ChartBarCategoryAxisY(QBarCategoryAxis *axis, QGraphicsItem* item) | ||||
: VerticalAxis(axis, item, true), | ||||
m_categoriesAxis(axis) | ||||
{ | ||||
QObject::connect( m_categoriesAxis,SIGNAL(categoriesChanged()),this, SLOT(handleCategoriesChanged())); | ||||
handleCategoriesChanged(); | ||||
} | ||||
ChartBarCategoryAxisY::~ChartBarCategoryAxisY() | ||||
{ | ||||
} | ||||
QVector<qreal> ChartBarCategoryAxisY::calculateLayout() const | ||||
{ | ||||
QVector<qreal> points; | ||||
const QRectF& gridRect = gridGeometry(); | ||||
qreal range = max() - min(); | ||||
const qreal delta = gridRect.height() / range; | ||||
if (delta < 2) | ||||
return points; | ||||
qreal adjustedMin = min() + 0.5; | ||||
qreal offset = (qCeil(adjustedMin) - adjustedMin) * delta; | ||||
int count = qFloor(range); | ||||
if (count < 1) | ||||
return points; | ||||
points.resize(count + 2); | ||||
for (int i = 0; i < count + 2; ++i) | ||||
points[i] = gridRect.bottom() - (qreal(i) * delta) - offset; | ||||
return points; | ||||
} | ||||
QStringList ChartBarCategoryAxisY::createCategoryLabels(const QVector<qreal>& layout) const | ||||
{ | ||||
QStringList result; | ||||
const QRectF &gridRect = gridGeometry(); | ||||
qreal d = (max() - min()) / gridRect.height(); | ||||
for (int i = 0; i < layout.count() - 1; ++i) { | ||||
qreal x = qFloor(((gridRect.height() - (layout[i + 1] + layout[i]) / 2 + gridRect.top()) * d + min() + 0.5)); | ||||
if ((x < m_categoriesAxis->categories().count()) && (x >= 0)) { | ||||
result << m_categoriesAxis->categories().at(x); | ||||
} else { | ||||
// No label for x coordinate | ||||
result << QString(); | ||||
} | ||||
} | ||||
result << QString(); | ||||
return result; | ||||
} | ||||
void ChartBarCategoryAxisY::updateGeometry() | ||||
{ | ||||
const QVector<qreal>& layout = ChartAxisElement::layout(); | ||||
if (layout.isEmpty()) | ||||
return; | ||||
setLabels(createCategoryLabels(layout)); | ||||
VerticalAxis::updateGeometry(); | ||||
} | ||||
void ChartBarCategoryAxisY::handleCategoriesChanged() | ||||
{ | ||||
QGraphicsLayoutItem::updateGeometry(); | ||||
if(presenter()) presenter()->layout()->invalidate(); | ||||
} | ||||
QSizeF ChartBarCategoryAxisY::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const | ||||
{ | ||||
Q_UNUSED(constraint) | ||||
QSizeF sh; | ||||
QSizeF base = VerticalAxis::sizeHint(which, constraint); | ||||
QStringList ticksList = m_categoriesAxis->categories(); | ||||
qreal width = 0; | ||||
qreal height = 0; // Height is irrelevant for Y axes with interval labels | ||||
switch (which) { | ||||
case Qt::MinimumSize: { | ||||
QRectF boundingRect = ChartPresenter::textBoundingRect(axis()->labelsFont(), | ||||
QStringLiteral("..."), | ||||
axis()->labelsAngle()); | ||||
width = boundingRect.width() + labelPadding() + base.width() + 1.0; | ||||
if (base.width() > 0.0) | ||||
width += labelPadding(); | ||||
sh = QSizeF(width, height); | ||||
break; | ||||
} | ||||
case Qt::PreferredSize:{ | ||||
qreal labelWidth = 0.0; | ||||
foreach (const QString& s, ticksList) { | ||||
QRectF rect = ChartPresenter::textBoundingRect(axis()->labelsFont(), s, axis()->labelsAngle()); | ||||
labelWidth = qMax(rect.width(), labelWidth); | ||||
} | ||||
width = labelWidth + labelPadding() + base.width() + 1.0; | ||||
if (base.width() > 0.0) | ||||
width += labelPadding(); | ||||
sh = QSizeF(width, height); | ||||
break; | ||||
} | ||||
default: | ||||
break; | ||||
} | ||||
return sh; | ||||
} | ||||
#include "moc_chartbarcategoryaxisy_p.cpp" | ||||
QT_CHARTS_END_NAMESPACE | ||||