chartlogvalueaxisy.cpp
136 lines
| 4.7 KiB
| text/x-c
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CppLexer
Marek Rosa
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r2274 | /**************************************************************************** | ||
| ** | ||||
Titta Heikkala
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r2776 | ** Copyright (C) 2015 The Qt Company Ltd | ||
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Marek Rosa
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r2274 | ** All rights reserved. | ||
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Titta Heikkala
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r2776 | ** For any questions to The Qt Company, please use contact form at http://qt.io | ||
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Marek Rosa
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r2274 | ** | ||
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Titta Heikkala
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r2740 | ** This file is part of the Qt Charts module. | ||
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Marek Rosa
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r2274 | ** | ||
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Titta Heikkala
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r2740 | ** Licensees holding valid commercial license for Qt may use this file in | ||
| ** accordance with the Qt License Agreement provided with the Software | ||||
| ** or, alternatively, in accordance with the terms contained in a written | ||||
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Titta Heikkala
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r2776 | ** agreement between you and The Qt Company. | ||
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Marek Rosa
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r2274 | ** | ||
| ** If you have questions regarding the use of this file, please use | ||||
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Titta Heikkala
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r2740 | ** contact form at http://qt.io | ||
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Marek Rosa
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r2274 | ** | ||
| ****************************************************************************/ | ||||
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Titta Heikkala
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r2714 | #include <private/chartlogvalueaxisy_p.h> | ||
| #include <private/chartpresenter_p.h> | ||||
| #include <QtCharts/QLogValueAxis> | ||||
| #include <private/abstractchartlayout_p.h> | ||||
| #include <QtWidgets/QGraphicsLayout> | ||||
| #include <QtCore/QtMath> | ||||
| #include <QtCore/QDebug> | ||||
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Titta Heikkala
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r2775 | #include <cmath> | ||
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r2274 | |||
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r2712 | QT_CHARTS_BEGIN_NAMESPACE | ||
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r2274 | |||
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r2483 | ChartLogValueAxisY::ChartLogValueAxisY(QLogValueAxis *axis, QGraphicsItem *item) | ||
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Marek Rosa
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r2274 | : VerticalAxis(axis, item), | ||
| m_axis(axis) | ||||
| { | ||||
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Miikka Heikkinen
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r2483 | QObject::connect(m_axis, SIGNAL(baseChanged(qreal)), this, SLOT(handleBaseChanged(qreal))); | ||
| QObject::connect(m_axis, SIGNAL(labelFormatChanged(QString)), this, SLOT(handleLabelFormatChanged(QString))); | ||||
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Marek Rosa
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r2274 | } | ||
| ChartLogValueAxisY::~ChartLogValueAxisY() | ||||
| { | ||||
| } | ||||
| QVector<qreal> ChartLogValueAxisY::calculateLayout() const | ||||
| { | ||||
| QVector<qreal> points; | ||||
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Titta Heikkala
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r2775 | qreal logMax = std::log10(m_axis->max()) / std::log10(m_axis->base()); | ||
| qreal logMin = std::log10(m_axis->min()) / std::log10(m_axis->base()); | ||||
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Marek Rosa
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r2275 | qreal leftEdge = logMin < logMax ? logMin : logMax; | ||
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Titta Heikkala
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r2775 | qreal ceilEdge = qCeil(leftEdge); | ||
| int tickCount = qAbs(qCeil(logMax) - qCeil(logMin)); | ||||
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r2274 | |||
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r2759 | points.resize(tickCount); | ||
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r2274 | const QRectF &gridRect = gridGeometry(); | ||
| const qreal deltaY = gridRect.height() / qAbs(logMax - logMin); | ||||
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Titta Heikkala
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r2759 | for (int i = 0; i < tickCount; ++i) | ||
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r2483 | points[i] = (ceilEdge + qreal(i)) * -deltaY - leftEdge * -deltaY + gridRect.bottom(); | ||
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Marek Rosa
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r2274 | |||
| return points; | ||||
| } | ||||
| void ChartLogValueAxisY::updateGeometry() | ||||
| { | ||||
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Miikka Heikkinen
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r2483 | const QVector<qreal> &layout = ChartAxisElement::layout(); | ||
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Marek Rosa
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r2274 | setLabels(createLogValueLabels(m_axis->min(), m_axis->max(), m_axis->base(), layout.size(), m_axis->labelFormat())); | ||
| VerticalAxis::updateGeometry(); | ||||
| } | ||||
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Marek Rosa
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r2322 | void ChartLogValueAxisY::handleBaseChanged(qreal base) | ||
| { | ||||
| Q_UNUSED(base); | ||||
Michal Klocek
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r2333 | QGraphicsLayoutItem::updateGeometry(); | ||
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Marek Rosa
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r2322 | if(presenter()) presenter()->layout()->invalidate(); | ||
| } | ||||
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r2274 | |||
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r2323 | void ChartLogValueAxisY::handleLabelFormatChanged(const QString &format) | ||
| { | ||||
| Q_UNUSED(format); | ||||
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Michal Klocek
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r2333 | QGraphicsLayoutItem::updateGeometry(); | ||
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Marek Rosa
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r2323 | if(presenter()) presenter()->layout()->invalidate(); | ||
| } | ||||
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Marek Rosa
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r2274 | QSizeF ChartLogValueAxisY::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const | ||
| { | ||||
| Q_UNUSED(constraint) | ||||
| QSizeF sh; | ||||
| QSizeF base = VerticalAxis::sizeHint(which, constraint); | ||||
| QStringList ticksList; | ||||
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Titta Heikkala
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r2775 | qreal logMax = std::log10(m_axis->max()) / std::log10(m_axis->base()); | ||
| qreal logMin = std::log10(m_axis->min()) / std::log10(m_axis->base()); | ||||
| int tickCount = qAbs(qCeil(logMax) - qCeil(logMin)); | ||||
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Miikka Heikkinen
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r2460 | if (m_axis->max() > m_axis->min() && tickCount > 0) | ||
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Marek Rosa
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r2274 | ticksList = createLogValueLabels(m_axis->min(), m_axis->max(), m_axis->base(), tickCount, m_axis->labelFormat()); | ||
| else | ||||
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Titta Heikkala
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r2712 | ticksList.append(QStringLiteral(" ")); | ||
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Marek Rosa
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r2274 | qreal width = 0; | ||
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r2443 | // Height of vertical axis sizeHint indicates the maximum distance labels can extend past | ||
| // first and last ticks. Base height is irrelevant. | ||||
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Marek Rosa
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r2274 | qreal height = 0; | ||
| switch (which) { | ||||
| case Qt::MinimumSize: { | ||||
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r2712 | QRectF boundingRect = ChartPresenter::textBoundingRect(axis()->labelsFont(), | ||
| QStringLiteral("..."), | ||||
| axis()->labelsAngle()); | ||||
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Miikka Heikkinen
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r2534 | width = boundingRect.width() + labelPadding() + base.width() + 1.0; | ||
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Miikka Heikkinen
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r2443 | height = boundingRect.height() / 2.0; | ||
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r2412 | sh = QSizeF(width, height); | ||
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Marek Rosa
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r2274 | break; | ||
| } | ||||
| case Qt::PreferredSize: { | ||||
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r2534 | qreal labelWidth = 0.0; | ||
| qreal firstHeight = -1.0; | ||||
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r2412 | foreach (const QString& s, ticksList) { | ||
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r2539 | QRectF rect = ChartPresenter::textBoundingRect(axis()->labelsFont(), s, axis()->labelsAngle()); | ||
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Miikka Heikkinen
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r2412 | labelWidth = qMax(rect.width(), labelWidth); | ||
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r2443 | height = rect.height(); | ||
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r2534 | if (firstHeight < 0.0) | ||
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r2443 | firstHeight = height; | ||
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Miikka Heikkinen
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r2412 | } | ||
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r2534 | width = labelWidth + labelPadding() + base.width() + 2.0; //two pixels of tolerance | ||
| height = qMax(height, firstHeight) / 2.0; | ||||
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Miikka Heikkinen
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r2412 | sh = QSizeF(width, height); | ||
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Marek Rosa
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r2274 | break; | ||
| } | ||||
| default: | ||||
| break; | ||||
| } | ||||
| return sh; | ||||
| } | ||||
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Marek Rosa
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r2322 | #include "moc_chartlogvalueaxisy_p.cpp" | ||
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Titta Heikkala
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r2712 | QT_CHARTS_END_NAMESPACE | ||