chartdatetimeaxisx.cpp
131 lines
| 4.1 KiB
| text/x-c
|
CppLexer
Marek Rosa
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r1717 | /**************************************************************************** | ||
| ** | ||||
Titta Heikkala
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r2688 | ** Copyright (C) 2014 Digia Plc | ||
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Marek Rosa
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r1717 | ** All rights reserved. | ||
Titta Heikkala
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r2740 | ** For any questions to Digia, please use contact form at http://qt.io | ||
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Marek Rosa
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r1717 | ** | ||
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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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r1717 | ** | ||
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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 | ||||
| ** agreement between you and Digia. | ||||
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Marek Rosa
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r1717 | ** | ||
| ** If you have questions regarding the use of this file, please use | ||||
|
Titta Heikkala
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r2740 | ** contact form at http://qt.io | ||
|
Marek Rosa
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r1717 | ** | ||
| ****************************************************************************/ | ||||
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Titta Heikkala
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r2714 | #include <private/chartdatetimeaxisx_p.h> | ||
| #include <private/chartpresenter_p.h> | ||||
| #include <QtCharts/QDateTimeAxis> | ||||
| #include <private/abstractchartlayout_p.h> | ||||
| #include <QtWidgets/QGraphicsLayout> | ||||
| #include <QtCore/QDateTime> | ||||
| #include <QtCore/QtMath> | ||||
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r1735 | |||
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r2712 | QT_CHARTS_BEGIN_NAMESPACE | ||
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r1717 | |||
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r2483 | ChartDateTimeAxisX::ChartDateTimeAxisX(QDateTimeAxis *axis, QGraphicsItem *item) | ||
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r2273 | : HorizontalAxis(axis, item), | ||
Jani Honkonen
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r2131 | m_axis(axis) | ||
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Marek Rosa
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r1717 | { | ||
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r2483 | QObject::connect(m_axis, SIGNAL(tickCountChanged(int)), this, SLOT(handleTickCountChanged(int))); | ||
| QObject::connect(m_axis, SIGNAL(formatChanged(QString)), this, SLOT(handleFormatChanged(QString))); | ||||
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Marek Rosa
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r1717 | } | ||
| ChartDateTimeAxisX::~ChartDateTimeAxisX() | ||||
| { | ||||
| } | ||||
| QVector<qreal> ChartDateTimeAxisX::calculateLayout() const | ||||
| { | ||||
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Michal Klocek
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r2273 | int tickCount = m_axis->tickCount(); | ||
| Q_ASSERT(tickCount >= 2); | ||||
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r1717 | |||
| QVector<qreal> points; | ||||
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r2273 | points.resize(tickCount); | ||
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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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r1717 | return points; | ||
| } | ||||
| void ChartDateTimeAxisX::updateGeometry() | ||||
| { | ||||
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r2483 | const QVector<qreal>& layout = ChartAxisElement::layout(); | ||
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r2131 | if (layout.isEmpty()) | ||
| return; | ||||
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r2483 | setLabels(createDateTimeLabels(min(), max(), layout.size(), m_axis->format())); | ||
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Michal Klocek
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r2111 | HorizontalAxis::updateGeometry(); | ||
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Marek Rosa
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r1717 | } | ||
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Michal Klocek
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r2273 | void ChartDateTimeAxisX::handleTickCountChanged(int tick) | ||
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Marek Rosa
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r1717 | { | ||
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r2273 | Q_UNUSED(tick) | ||
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Michal Klocek
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r2335 | QGraphicsLayoutItem::updateGeometry(); | ||
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Miikka Heikkinen
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r2483 | if (presenter()) | ||
| presenter()->layout()->invalidate(); | ||||
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Marek Rosa
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r1717 | } | ||
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Marek Rosa
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r2326 | void ChartDateTimeAxisX::handleFormatChanged(const QString &format) | ||
| { | ||||
| Q_UNUSED(format); | ||||
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Michal Klocek
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r2335 | QGraphicsLayoutItem::updateGeometry(); | ||
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r2483 | if (presenter()) | ||
| presenter()->layout()->invalidate(); | ||||
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Marek Rosa
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r2326 | } | ||
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Jani Honkonen
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r2131 | QSizeF ChartDateTimeAxisX::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const | ||
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r1965 | { | ||
| Q_UNUSED(constraint) | ||||
| QSizeF sh; | ||||
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r2137 | QSizeF base = HorizontalAxis::sizeHint(which, constraint); | ||
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r2483 | QStringList ticksList = createDateTimeLabels(min(), max(), m_axis->tickCount(), m_axis->format()); | ||
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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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r2137 | qreal width = 0; | ||
| qreal height = 0; | ||||
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r2443 | if (ticksList.empty()) | ||
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r2273 | return sh; | ||
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r2131 | switch (which) { | ||
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r2483 | 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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Jani Honkonen
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r2131 | break; | ||
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r2137 | } | ||
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r2131 | 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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r2534 | if (firstWidth < 0.0) | ||
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r2443 | firstWidth = width; | ||
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r2412 | } | ||
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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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Jani Honkonen
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r2131 | break; | ||
| } | ||||
| default: | ||||
| break; | ||||
| } | ||||
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r1965 | |||
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r2131 | 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_chartdatetimeaxisx_p.cpp" | ||
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Titta Heikkala
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r2712 | QT_CHARTS_END_NAMESPACE | ||