chartcategoryaxisy.cpp
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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/chartcategoryaxisy_p.h> | ||||
#include <QtCharts/QCategoryAxis> | ||||
#include <QtCharts/QAbstractAxis> | ||||
#include <private/chartpresenter_p.h> | ||||
#include <private/abstractchartlayout_p.h> | ||||
#include <QtWidgets/QGraphicsLayout> | ||||
#include <QtCore/QtMath> | ||||
#include <QtCore/QDebug> | ||||
QT_CHARTS_BEGIN_NAMESPACE | ||||
ChartCategoryAxisY::ChartCategoryAxisY(QCategoryAxis *axis, QGraphicsItem* item) | ||||
: VerticalAxis(axis, item, true), | ||||
m_axis(axis) | ||||
{ | ||||
QObject::connect(axis, SIGNAL(categoriesChanged()), this, SLOT(handleCategoriesChanged())); | ||||
} | ||||
ChartCategoryAxisY::~ChartCategoryAxisY() | ||||
{ | ||||
} | ||||
QVector<qreal> ChartCategoryAxisY::calculateLayout() const | ||||
{ | ||||
int tickCount = m_axis->categoriesLabels().count() + 1; | ||||
QVector<qreal> points; | ||||
if (tickCount < 2) | ||||
return points; | ||||
const QRectF &gridRect = gridGeometry(); | ||||
qreal range = max() - min(); | ||||
if (range > 0) { | ||||
points.resize(tickCount); | ||||
qreal scale = gridRect.height() / range; | ||||
for (int i = 0; i < tickCount; ++i) { | ||||
if (i < tickCount - 1) { | ||||
qreal y = -(m_axis->startValue(m_axis->categoriesLabels().at(i)) - min()) * scale + gridRect.bottom(); | ||||
points[i] = y; | ||||
} else { | ||||
qreal y = -(m_axis->endValue(m_axis->categoriesLabels().at(i - 1)) - min()) * scale + gridRect.bottom(); | ||||
points[i] = y; | ||||
} | ||||
} | ||||
} | ||||
return points; | ||||
} | ||||
void ChartCategoryAxisY::updateGeometry() | ||||
{ | ||||
setLabels(m_axis->categoriesLabels() << QString()); | ||||
VerticalAxis::updateGeometry(); | ||||
} | ||||
QSizeF ChartCategoryAxisY::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const | ||||
{ | ||||
Q_UNUSED(constraint) | ||||
QSizeF sh; | ||||
QSizeF base = VerticalAxis::sizeHint(which, constraint); | ||||
QStringList ticksList = m_axis->categoriesLabels(); | ||||
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; | ||||
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; | ||||
sh = QSizeF(width, height); | ||||
break; | ||||
} | ||||
default: | ||||
break; | ||||
} | ||||
return sh; | ||||
} | ||||
void ChartCategoryAxisY::handleCategoriesChanged() | ||||
{ | ||||
QGraphicsLayoutItem::updateGeometry(); | ||||
presenter()->layout()->invalidate(); | ||||
} | ||||
#include "moc_chartcategoryaxisy_p.cpp" | ||||
QT_CHARTS_END_NAMESPACE | ||||