| /**************************************************************************** |
| ** |
| ** 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 |
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| ** |
| ** 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 |
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| ** |
| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| #include <private/chartcategoryaxisx_p.h> |
| #include <QtCharts/QCategoryAxis> |
| #include <QtCharts/QAbstractAxis> |
| #include <private/chartpresenter_p.h> |
| #include <private/abstractchartlayout_p.h> |
| #include <QtWidgets/QGraphicsLayout> |
| #include <QtCore/QtMath> |
| |
| QT_CHARTS_BEGIN_NAMESPACE |
| |
| ChartCategoryAxisX::ChartCategoryAxisX(QCategoryAxis *axis, QGraphicsItem* item) |
| : HorizontalAxis(axis, item, true), |
| m_axis(axis) |
| { |
| QObject::connect(axis, SIGNAL(categoriesChanged()), this, SLOT(handleCategoriesChanged())); |
| } |
| |
| ChartCategoryAxisX::~ChartCategoryAxisX() |
| { |
| } |
| |
| QVector<qreal> ChartCategoryAxisX::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.width() / range; |
| for (int i = 0; i < tickCount; ++i) { |
| if (i < tickCount - 1) { |
| qreal x = (m_axis->startValue(m_axis->categoriesLabels().at(i)) - min()) * scale + gridRect.left(); |
| points[i] = x; |
| } else { |
| qreal x = (m_axis->endValue(m_axis->categoriesLabels().at(i - 1)) - min()) * scale + gridRect.left(); |
| points[i] = x; |
| } |
| } |
| } |
| |
| return points; |
| } |
| |
| void ChartCategoryAxisX::updateGeometry() |
| { |
| setLabels(m_axis->categoriesLabels() << QString()); |
| HorizontalAxis::updateGeometry(); |
| } |
| |
| QSizeF ChartCategoryAxisX::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const |
| { |
| Q_UNUSED(constraint) |
| |
| QSizeF sh; |
| QSizeF base = HorizontalAxis::sizeHint(which, constraint); |
| QStringList ticksList = m_axis->categoriesLabels(); |
| qreal width = 0; // Width is irrelevant for X axes with interval labels |
| qreal height = 0; |
| |
| switch (which) { |
| case Qt::MinimumSize: { |
| QRectF boundingRect = ChartPresenter::textBoundingRect(axis()->labelsFont(), |
| QStringLiteral("..."), |
| axis()->labelsAngle()); |
| height = boundingRect.height() + labelPadding() + base.height() + 1.0; |
| sh = QSizeF(width, height); |
| break; |
| } |
| case Qt::PreferredSize: { |
| qreal labelHeight = 0.0; |
| foreach (const QString& s, ticksList) { |
| QRectF rect = ChartPresenter::textBoundingRect(axis()->labelsFont(), s, axis()->labelsAngle()); |
| labelHeight = qMax(rect.height(), labelHeight); |
| } |
| height = labelHeight + labelPadding() + base.height() + 1.0; |
| sh = QSizeF(width, height); |
| break; |
| } |
| default: |
| break; |
| } |
| |
| return sh; |
| } |
| |
| void ChartCategoryAxisX::handleCategoriesChanged() |
| { |
| QGraphicsLayoutItem::updateGeometry(); |
| presenter()->layout()->invalidate(); |
| } |
| |
| QT_CHARTS_END_NAMESPACE |
| |
| #include "moc_chartcategoryaxisx_p.cpp" |