chartvalueaxisy.cpp
128 lines
| 4.0 KiB
| text/x-c
|
CppLexer
Marek Rosa
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r1555 | /**************************************************************************** | ||
| ** | ||||
Miikka Heikkinen
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r2432 | ** Copyright (C) 2013 Digia Plc | ||
|
Marek Rosa
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r1555 | ** 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 | ||||
| ** $QT_END_LICENSE$ | ||||
| ** | ||||
| ****************************************************************************/ | ||||
|
Marek Rosa
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r1805 | #include "chartvalueaxisy_p.h" | ||
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Marek Rosa
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r1555 | #include "qabstractaxis.h" | ||
| #include "chartpresenter_p.h" | ||||
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r1805 | #include "qvalueaxis.h" | ||
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r2483 | #include "abstractchartlayout_p.h" | ||
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r1555 | #include <QGraphicsLayout> | ||
Michal Klocek
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r1735 | #include <qmath.h> | ||
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Michal Klocek
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r2133 | #include <QDebug> | ||
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r1555 | |||
| QTCOMMERCIALCHART_BEGIN_NAMESPACE | ||||
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r2483 | ChartValueAxisY::ChartValueAxisY(QValueAxis *axis, QGraphicsItem *item) | ||
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Michal Klocek
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r2273 | : VerticalAxis(axis, item), | ||
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r2131 | m_axis(axis) | ||
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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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r1555 | } | ||
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r1805 | ChartValueAxisY::~ChartValueAxisY() | ||
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r1555 | { | ||
| } | ||||
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r1805 | QVector<qreal> ChartValueAxisY::calculateLayout() const | ||
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r1555 | { | ||
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Michal Klocek
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r2273 | int tickCount = m_axis->tickCount(); | ||
| 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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r2111 | |||
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r2447 | const qreal deltaY = gridRect.height() / (qreal(tickCount) - 1.0); | ||
| for (int i = 0; i < tickCount; ++i) | ||||
| points[i] = qreal(i) * -deltaY + gridRect.bottom(); | ||||
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r1561 | |||
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r1555 | return points; | ||
| } | ||||
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r1805 | void ChartValueAxisY::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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Michal Klocek
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r2273 | setLabels(createValueLabels(min(),max(),layout.size(),m_axis->labelFormat())); | ||
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Michal Klocek
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r2111 | VerticalAxis::updateGeometry(); | ||
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Marek Rosa
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r1555 | } | ||
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Michal Klocek
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r2273 | void ChartValueAxisY::handleTickCountChanged(int tick) | ||
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Michal Klocek
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r1698 | { | ||
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Michal Klocek
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r2273 | 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 ChartValueAxisY::handleLabelFormatChanged(const QString &format) | ||
| { | ||||
| Q_UNUSED(format); | ||||
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Michal Klocek
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r2333 | QGraphicsLayoutItem::updateGeometry(); | ||
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r2323 | if(presenter()) presenter()->layout()->invalidate(); | ||
| } | ||||
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r2131 | QSizeF ChartValueAxisY::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 = VerticalAxis::sizeHint(which, constraint); | ||
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r2273 | QStringList ticksList = createValueLabels(min(),max(),m_axis->tickCount(),m_axis->labelFormat()); | ||
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r2131 | 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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r2131 | qreal height = 0; | ||
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r1965 | |||
| switch (which) { | ||||
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r2093 | case Qt::MinimumSize: { | ||
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r2539 | QRectF boundingRect = ChartPresenter::textBoundingRect(axis()->labelsFont(), "...", axis()->labelsAngle()); | ||
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r2534 | width = boundingRect.width() + labelPadding() + base.width() + 1.0; | ||
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r2443 | height = boundingRect.height() / 2.0; | ||
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r2412 | sh = QSizeF(width, height); | ||
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r2093 | break; | ||
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r2105 | } | ||
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r2412 | 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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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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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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r2412 | sh = QSizeF(width, height); | ||
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r2093 | break; | ||
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r2105 | } | ||
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Marek Rosa
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r2093 | default: | ||
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Michal Klocek
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r1965 | break; | ||
| } | ||||
| return sh; | ||||
| } | ||||
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Michal Klocek
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r1698 | |||
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Michal Klocek
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r2273 | #include "moc_chartvalueaxisy_p.cpp" | ||
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Marek Rosa
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r1555 | QTCOMMERCIALCHART_END_NAMESPACE | ||