| /**************************************************************************** |
| ** |
| ** 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 |
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| ** GNU General Public License Usage |
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| ** General Public License version 3 or (at your option) any later version |
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| ** the Free Software Foundation and appearing in the file LICENSE.GPL3 |
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| ****************************************************************************/ |
| |
| #include <private/chartvalueaxisx_p.h> |
| #include <QtCharts/QAbstractAxis> |
| #include <private/chartpresenter_p.h> |
| #include <QtCharts/QValueAxis> |
| #include <private/abstractchartlayout_p.h> |
| #include <private/valueaxislabel_p.h> |
| #include <QtWidgets/QGraphicsLayout> |
| #include <QtCore/QtMath> |
| #include <QtCore/QDebug> |
| |
| |
| QT_CHARTS_BEGIN_NAMESPACE |
| |
| ChartValueAxisX::ChartValueAxisX(QValueAxis *axis, QGraphicsItem *item ) |
| : HorizontalAxis(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))); |
| } |
| |
| ChartValueAxisX::~ChartValueAxisX() |
| { |
| } |
| |
| QVector<qreal> ChartValueAxisX::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 deltaX = gridRect.width() / (qreal(tickCount) - 1.0); |
| for (int i = 0; i < tickCount; ++i) |
| points[i] = qreal(i) * deltaX + gridRect.left(); |
| return points; |
| } else { // QValueAxis::TicksDynamic |
| 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 deltaX = gridRect.width() / (maxValue - minValue); |
| |
| QVector<qreal> points; |
| const qreal leftPos = gridRect.left(); |
| while (value <= maxValue || qFuzzyCompare(value, maxValue)) { |
| points << (value - minValue) * deltaX + leftPos; |
| value += interval; |
| } |
| |
| return points; |
| } |
| } |
| |
| void ChartValueAxisX::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())); |
| HorizontalAxis::updateGeometry(); |
| updateLabelsValues(m_axis); |
| } |
| |
| void ChartValueAxisX::handleTickCountChanged(int tick) |
| { |
| Q_UNUSED(tick); |
| QGraphicsLayoutItem::updateGeometry(); |
| if (presenter()) presenter()->layout()->invalidate(); |
| } |
| |
| void ChartValueAxisX::handleMinorTickCountChanged(int tick) |
| { |
| Q_UNUSED(tick); |
| QGraphicsLayoutItem::updateGeometry(); |
| if (presenter()) |
| presenter()->layout()->invalidate(); |
| } |
| |
| void ChartValueAxisX::handleLabelFormatChanged(const QString &format) |
| { |
| Q_UNUSED(format); |
| QGraphicsLayoutItem::updateGeometry(); |
| if (presenter()) presenter()->layout()->invalidate(); |
| } |
| |
| void ChartValueAxisX::handleTickIntervalChanged(qreal interval) |
| { |
| Q_UNUSED(interval) |
| QGraphicsLayoutItem::updateGeometry(); |
| if (presenter()) presenter()->layout()->invalidate(); |
| } |
| |
| void ChartValueAxisX::handleTickAnchorChanged(qreal anchor) |
| { |
| Q_UNUSED(anchor) |
| QGraphicsLayoutItem::updateGeometry(); |
| if (presenter()) presenter()->layout()->invalidate(); |
| } |
| |
| void ChartValueAxisX::handleTickTypeChanged(QValueAxis::TickType type) |
| { |
| Q_UNUSED(type) |
| QGraphicsLayoutItem::updateGeometry(); |
| if (presenter()) presenter()->layout()->invalidate(); |
| } |
| |
| QSizeF ChartValueAxisX::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const |
| { |
| Q_UNUSED(constraint) |
| |
| QSizeF sh; |
| |
| QSizeF base = HorizontalAxis::sizeHint(which, constraint); |
| QStringList ticksList = createValueLabels(min(), max(), m_axis->tickCount(), |
| m_axis->tickInterval(), m_axis->tickAnchor(), |
| m_axis->tickType(), m_axis->labelFormat()); |
| // Width of horizontal axis sizeHint indicates the maximum distance labels can extend past |
| // first and last ticks. Base width is irrelevant. |
| qreal width = 0; |
| qreal height = 0; |
| |
| switch (which) { |
| case Qt::MinimumSize: { |
| QRectF boundingRect = ChartPresenter::textBoundingRect(axis()->labelsFont(), |
| QStringLiteral("..."), |
| axis()->labelsAngle()); |
| width = boundingRect.width() / 2.0; |
| height = boundingRect.height() + labelPadding() + base.height() + 1.0; |
| sh = QSizeF(width, height); |
| break; |
| } |
| case Qt::PreferredSize: { |
| qreal labelHeight = 0.0; |
| qreal firstWidth = -1.0; |
| foreach (const QString& s, ticksList) { |
| QRectF rect = ChartPresenter::textBoundingRect(axis()->labelsFont(), s, axis()->labelsAngle()); |
| labelHeight = qMax(rect.height(), labelHeight); |
| width = rect.width(); |
| if (firstWidth < 0.0) |
| firstWidth = width; |
| } |
| height = labelHeight + labelPadding() + base.height() + 1.0; |
| width = qMax(width, firstWidth) / 2.0; |
| sh = QSizeF(width, height); |
| break; |
| } |
| default: |
| break; |
| } |
| return sh; |
| } |
| |
| QT_CHARTS_END_NAMESPACE |
| |
| #include "moc_chartvalueaxisx_p.cpp" |