| /**************************************************************************** |
| ** |
| ** 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 |
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| ** |
| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| #include <private/chartbarcategoryaxisx_p.h> |
| #include <private/chartpresenter_p.h> |
| #include <private/qbarcategoryaxis_p.h> |
| #include <private/abstractchartlayout_p.h> |
| #include <QtCore/QDebug> |
| #include <QtCore/QtMath> |
| |
| QT_CHARTS_BEGIN_NAMESPACE |
| |
| ChartBarCategoryAxisX::ChartBarCategoryAxisX(QBarCategoryAxis *axis, QGraphicsItem* item) |
| : HorizontalAxis(axis, item, true), |
| m_categoriesAxis(axis) |
| { |
| QObject::connect(m_categoriesAxis,SIGNAL(categoriesChanged()),this, SLOT(handleCategoriesChanged())); |
| handleCategoriesChanged(); |
| } |
| |
| ChartBarCategoryAxisX::~ChartBarCategoryAxisX() |
| { |
| } |
| |
| QVector<qreal> ChartBarCategoryAxisX::calculateLayout() const |
| { |
| QVector<qreal> points; |
| const QRectF& gridRect = gridGeometry(); |
| qreal range = max() - min(); |
| const qreal delta = gridRect.width() / range; |
| |
| if (delta < 2) |
| return points; |
| |
| qreal adjustedMin = min() + 0.5; |
| qreal offset = (qRound(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] = offset + (qreal(i) * delta) + gridRect.left(); |
| |
| return points; |
| } |
| |
| QStringList ChartBarCategoryAxisX::createCategoryLabels(const QVector<qreal>& layout) const |
| { |
| QStringList result ; |
| const QRectF &gridRect = gridGeometry(); |
| qreal d = (max() - min()) / gridRect.width(); |
| |
| for (int i = 0; i < layout.count() - 1; ++i) { |
| int x = qFloor((((layout[i] + layout[i + 1]) / 2 - gridRect.left()) * d + min() + 0.5)); |
| if (x < max() && (x >= 0) && x < m_categoriesAxis->categories().count()) { |
| result << m_categoriesAxis->categories().at(x); |
| } else { |
| // No label for x coordinate |
| result << QString(); |
| } |
| } |
| result << QString(); |
| return result; |
| } |
| |
| |
| void ChartBarCategoryAxisX::updateGeometry() |
| { |
| const QVector<qreal>& layout = ChartAxisElement::layout(); |
| if (layout.isEmpty()) |
| return; |
| setLabels(createCategoryLabels(layout)); |
| HorizontalAxis::updateGeometry(); |
| } |
| |
| void ChartBarCategoryAxisX::handleCategoriesChanged() |
| { |
| QGraphicsLayoutItem::updateGeometry(); |
| if(presenter()) presenter()->layout()->invalidate(); |
| } |
| |
| QSizeF ChartBarCategoryAxisX::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const |
| { |
| Q_UNUSED(constraint) |
| |
| QSizeF sh; |
| QSizeF base = HorizontalAxis::sizeHint(which, constraint); |
| QStringList ticksList = m_categoriesAxis->categories(); |
| |
| 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; |
| } |
| |
| QT_CHARTS_END_NAMESPACE |
| |
| #include "moc_chartbarcategoryaxisx_p.cpp" |