chartdatetimeaxisx.cpp
133 lines
| 3.9 KiB
| text/x-c
|
CppLexer
Marek Rosa
|
r1717 | /**************************************************************************** | ||
| ** | ||||
Miikka Heikkinen
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r2432 | ** Copyright (C) 2013 Digia Plc | ||
|
Marek Rosa
|
r1717 | ** All rights reserved. | ||
| ** For any questions to Digia, please use contact form at http://qt.digia.com | ||||
| ** | ||||
| ** This file is part of the Qt Commercial Charts Add-on. | ||||
| ** | ||||
| ** $QT_BEGIN_LICENSE$ | ||||
| ** Licensees holding valid Qt Commercial licenses may use this file in | ||||
| ** accordance with the Qt Commercial License Agreement provided with the | ||||
| ** Software or, alternatively, in accordance with the terms contained in | ||||
| ** a written agreement between you and Digia. | ||||
| ** | ||||
| ** If you have questions regarding the use of this file, please use | ||||
| ** contact form at http://qt.digia.com | ||||
| ** $QT_END_LICENSE$ | ||||
| ** | ||||
| ****************************************************************************/ | ||||
| #include "chartdatetimeaxisx_p.h" | ||||
| #include "chartpresenter_p.h" | ||||
| #include "qdatetimeaxis.h" | ||||
Michal Klocek
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r2137 | #include "chartlayout_p.h" | ||
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Marek Rosa
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r1717 | #include <QGraphicsLayout> | ||
| #include <QDateTime> | ||||
|
Michal Klocek
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r1735 | #include <QFontMetrics> | ||
| #include <qmath.h> | ||||
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Marek Rosa
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r1717 | QTCOMMERCIALCHART_BEGIN_NAMESPACE | ||
|
Michal Klocek
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r2273 | ChartDateTimeAxisX::ChartDateTimeAxisX(QDateTimeAxis *axis, QGraphicsItem* item) | ||
| : HorizontalAxis(axis, item), | ||||
Jani Honkonen
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r2131 | m_axis(axis) | ||
|
Marek Rosa
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r1717 | { | ||
|
Michal Klocek
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r2273 | QObject::connect(m_axis,SIGNAL(tickCountChanged(int)),this, SLOT(handleTickCountChanged(int))); | ||
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Marek Rosa
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r2326 | 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 | ||||
| { | ||||
|
Michal Klocek
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r2273 | int tickCount = m_axis->tickCount(); | ||
| Q_ASSERT(tickCount >= 2); | ||||
|
Marek Rosa
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r1717 | |||
| QVector<qreal> points; | ||||
|
Michal Klocek
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r2273 | points.resize(tickCount); | ||
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Jani Honkonen
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r2131 | const QRectF &gridRect = gridGeometry(); | ||
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Miikka Heikkinen
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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(); | ||||
|
Marek Rosa
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r1717 | return points; | ||
| } | ||||
| void ChartDateTimeAxisX::updateGeometry() | ||||
| { | ||||
| const QVector<qreal>& layout = ChartAxis::layout(); | ||||
|
Jani Honkonen
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r2131 | if (layout.isEmpty()) | ||
| return; | ||||
|
Michal Klocek
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r2273 | setLabels(createDateTimeLabels(min(),max(), layout.size(),m_axis->format())); | ||
|
Michal Klocek
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r2111 | HorizontalAxis::updateGeometry(); | ||
|
Marek Rosa
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r1717 | } | ||
|
Michal Klocek
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r2273 | void ChartDateTimeAxisX::handleTickCountChanged(int tick) | ||
|
Marek Rosa
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r1717 | { | ||
|
Michal Klocek
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r2273 | Q_UNUSED(tick) | ||
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Michal Klocek
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r2335 | QGraphicsLayoutItem::updateGeometry(); | ||
|
Michal Klocek
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r2273 | if(presenter()) presenter()->layout()->invalidate(); | ||
|
Marek Rosa
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r1717 | } | ||
|
Marek Rosa
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r2326 | void ChartDateTimeAxisX::handleFormatChanged(const QString &format) | ||
| { | ||||
| Q_UNUSED(format); | ||||
|
Michal Klocek
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r2335 | QGraphicsLayoutItem::updateGeometry(); | ||
|
Marek Rosa
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r2326 | if(presenter()) presenter()->layout()->invalidate(); | ||
| } | ||||
|
Jani Honkonen
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r2131 | QSizeF ChartDateTimeAxisX::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const | ||
|
Michal Klocek
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r1965 | { | ||
| Q_UNUSED(constraint) | ||||
|
Michal Klocek
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r2111 | QFontMetrics fn(font()); | ||
|
Michal Klocek
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r1965 | QSizeF sh; | ||
|
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r2137 | QSizeF base = HorizontalAxis::sizeHint(which, constraint); | ||
|
Michal Klocek
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r2273 | QStringList ticksList = createDateTimeLabels(min(),max(),m_axis->tickCount(),m_axis->format()); | ||
|
Miikka Heikkinen
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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. | ||||
|
Michal Klocek
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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) { | ||
|
Michal Klocek
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r2137 | case Qt::MinimumSize:{ | ||
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r2412 | QRectF boundingRect = labelBoundingRect(fn, "..."); | ||
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Miikka Heikkinen
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r2443 | width = boundingRect.width() / 2.0; | ||
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Miikka Heikkinen
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r2412 | height = boundingRect.height() + labelPadding(); | ||
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Michal Klocek
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r2137 | height += base.height(); | ||
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r2412 | sh = QSizeF(width, height); | ||
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Jani Honkonen
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r2131 | break; | ||
|
Michal Klocek
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r2137 | } | ||
|
Jani Honkonen
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r2131 | case Qt::PreferredSize: { | ||
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r2412 | int labelHeight = 0; | ||
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r2443 | int firstWidth = -1; | ||
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r2412 | foreach (const QString& s, ticksList) { | ||
| QRect rect = labelBoundingRect(fn, s); | ||||
| labelHeight = qMax(rect.height(), labelHeight); | ||||
|
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r2443 | width = rect.width(); | ||
| if (firstWidth < 0) | ||||
| firstWidth = width; | ||||
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r2412 | } | ||
| height = labelHeight + labelPadding(); | ||||
| height += base.height(); | ||||
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r2443 | width = qMax(width, qreal(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; | ||||
| } | ||||
|
Michal Klocek
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r1965 | |||
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Jani Honkonen
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r2131 | return sh; | ||
|
Michal Klocek
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r1965 | } | ||
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Michal Klocek
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r2273 | #include "moc_chartdatetimeaxisx_p.cpp" | ||
|
Marek Rosa
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r1717 | QTCOMMERCIALCHART_END_NAMESPACE | ||