chartvalueaxisx.cpp
128 lines
| 4.2 KiB
| text/x-c
|
CppLexer
Marek Rosa
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r1555 | /**************************************************************************** | ||
| ** | ||||
Titta Heikkala
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r2776 | ** Copyright (C) 2015 The Qt Company Ltd | ||
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Marek Rosa
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r1555 | ** 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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r1555 | ** | ||
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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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r1555 | ** | ||
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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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r1555 | ** | ||
| ** 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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r1555 | ** | ||
| ****************************************************************************/ | ||||
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Titta Heikkala
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r2714 | #include <private/chartvalueaxisx_p.h> | ||
| #include <QtCharts/QAbstractAxis> | ||||
| #include <private/chartpresenter_p.h> | ||||
| #include <QtCharts/QValueAxis> | ||||
| #include <private/abstractchartlayout_p.h> | ||||
| #include <QtWidgets/QGraphicsLayout> | ||||
| #include <QtCore/QtMath> | ||||
| #include <QtCore/QDebug> | ||||
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r1555 | |||
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r2106 | |||
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r2712 | QT_CHARTS_BEGIN_NAMESPACE | ||
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r1555 | |||
Miikka Heikkinen
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r2483 | ChartValueAxisX::ChartValueAxisX(QValueAxis *axis, QGraphicsItem *item ) | ||
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Michal Klocek
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r2273 | : HorizontalAxis(axis, item), | ||
| m_axis(axis) | ||||
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Marek Rosa
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r1555 | { | ||
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r2483 | QObject::connect(m_axis, SIGNAL(tickCountChanged(int)), this, SLOT(handleTickCountChanged(int))); | ||
| QObject::connect(m_axis, SIGNAL(labelFormatChanged(QString)), this, SLOT(handleLabelFormatChanged(QString))); | ||||
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Marek Rosa
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r1555 | } | ||
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Marek Rosa
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r1805 | ChartValueAxisX::~ChartValueAxisX() | ||
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Marek Rosa
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r1555 | { | ||
| } | ||||
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r1805 | QVector<qreal> ChartValueAxisX::calculateLayout() const | ||
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Marek Rosa
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r1555 | { | ||
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r2712 | int tickCount = m_axis->tickCount(); | ||
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Michal Klocek
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r2273 | |||
| Q_ASSERT(tickCount >= 2); | ||||
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r1555 | |||
| QVector<qreal> points; | ||||
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r2273 | points.resize(tickCount); | ||
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r1555 | |||
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r2131 | const QRectF &gridRect = gridGeometry(); | ||
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r2447 | const qreal deltaX = gridRect.width() / (qreal(tickCount) - 1.0); | ||
| for (int i = 0; i < tickCount; ++i) | ||||
| points[i] = qreal(i) * deltaX + gridRect.left(); | ||||
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Marek Rosa
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r1555 | return points; | ||
| } | ||||
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r1805 | void ChartValueAxisX::updateGeometry() | ||
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r1555 | { | ||
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r2483 | const QVector<qreal>& layout = ChartAxisElement::layout(); | ||
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Jani Honkonen
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r2131 | if (layout.isEmpty()) | ||
| return; | ||||
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r2483 | setLabels(createValueLabels(min(), max(), layout.size(), m_axis->labelFormat())); | ||
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Michal Klocek
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r2111 | HorizontalAxis::updateGeometry(); | ||
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Marek Rosa
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r1555 | } | ||
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Michal Klocek
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r2273 | void ChartValueAxisX::handleTickCountChanged(int tick) | ||
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Michal Klocek
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r1698 | { | ||
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r2712 | Q_UNUSED(tick); | ||
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Michal Klocek
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r2333 | QGraphicsLayoutItem::updateGeometry(); | ||
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Michal Klocek
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r2273 | if(presenter()) presenter()->layout()->invalidate(); | ||
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Michal Klocek
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r1698 | } | ||
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r2323 | void ChartValueAxisX::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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r2131 | QSizeF ChartValueAxisX::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const | ||
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r1965 | { | ||
| Q_UNUSED(constraint) | ||||
| QSizeF sh; | ||||
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r2138 | QSizeF base = HorizontalAxis::sizeHint(which, constraint); | ||
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r2273 | QStringList ticksList = createValueLabels(min(),max(),m_axis->tickCount(),m_axis->labelFormat()); | ||
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r2443 | // Width of horizontal axis sizeHint indicates the maximum distance labels can extend past | ||
| // first and last ticks. Base width is irrelevant. | ||||
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Jani Honkonen
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r2131 | qreal width = 0; | ||
| qreal height = 0; | ||||
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r1965 | |||
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r2093 | switch (which) { | ||
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Michal Klocek
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r2353 | case Qt::MinimumSize: { | ||
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r2712 | QRectF boundingRect = ChartPresenter::textBoundingRect(axis()->labelsFont(), | ||
| QStringLiteral("..."), | ||||
| axis()->labelsAngle()); | ||||
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r2443 | width = boundingRect.width() / 2.0; | ||
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r2534 | height = boundingRect.height() + labelPadding() + base.height() + 1.0; | ||
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r2412 | sh = QSizeF(width, height); | ||
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r2353 | break; | ||
| } | ||||
| case Qt::PreferredSize: { | ||||
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r2534 | qreal labelHeight = 0.0; | ||
| qreal firstWidth = -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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r2412 | labelHeight = qMax(rect.height(), labelHeight); | ||
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r2443 | width = rect.width(); | ||
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Miikka Heikkinen
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r2534 | if (firstWidth < 0.0) | ||
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r2443 | firstWidth = width; | ||
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Michal Klocek
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r2353 | } | ||
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r2534 | height = labelHeight + labelPadding() + base.height() + 1.0; | ||
| width = qMax(width, firstWidth) / 2.0; | ||||
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r2412 | sh = QSizeF(width, height); | ||
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r2353 | break; | ||
| } | ||||
| default: | ||||
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r2412 | break; | ||
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Marek Rosa
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r2093 | } | ||
| return sh; | ||||
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Michal Klocek
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r1965 | } | ||
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Michal Klocek
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r2273 | #include "moc_chartvalueaxisx_p.cpp" | ||
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Titta Heikkala
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r2712 | QT_CHARTS_END_NAMESPACE | ||