chartvalueaxisy.cpp
133 lines
| 3.9 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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r1555 | #include "qabstractaxis.h" | ||
| #include "chartpresenter_p.h" | ||||
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r1805 | #include "qvalueaxis.h" | ||
Michal Klocek
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r2106 | #include "chartlayout_p.h" | ||
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r1555 | #include <QGraphicsLayout> | ||
| #include <QFontMetrics> | ||||
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r1735 | #include <qmath.h> | ||
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r2133 | #include <QDebug> | ||
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r1555 | |||
| QTCOMMERCIALCHART_BEGIN_NAMESPACE | ||||
|
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r2273 | ChartValueAxisY::ChartValueAxisY(QValueAxis *axis, QGraphicsItem* item) | ||
| : VerticalAxis(axis, item), | ||||
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r2131 | m_axis(axis) | ||
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r1555 | { | ||
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r2273 | QObject::connect(m_axis,SIGNAL(tickCountChanged(int)),this, SLOT(handleTickCountChanged(int))); | ||
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r2323 | 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 | { | ||
|
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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r2273 | const qreal deltaY = gridRect.height() / (tickCount - 1); | ||
| for (int i = 0; i < tickCount; ++i) { | ||||
|
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r2144 | points[i] = i * -deltaY + gridRect.bottom(); | ||
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r1555 | } | ||
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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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r1561 | const QVector<qreal> &layout = ChartAxis::layout(); | ||
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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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r2111 | VerticalAxis::updateGeometry(); | ||
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r1555 | } | ||
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Michal Klocek
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r2273 | void ChartValueAxisY::handleTickCountChanged(int tick) | ||
|
Michal Klocek
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r1698 | { | ||
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r2273 | Q_UNUSED(tick); | ||
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r2333 | QGraphicsLayoutItem::updateGeometry(); | ||
|
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r2273 | if(presenter()) presenter()->layout()->invalidate(); | ||
|
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r1698 | } | ||
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r2323 | void ChartValueAxisY::handleLabelFormatChanged(const QString &format) | ||
| { | ||||
| Q_UNUSED(format); | ||||
|
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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) | ||||
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r2111 | QFontMetrics fn(font()); | ||
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r1965 | 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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r2412 | QRectF boundingRect = labelBoundingRect(fn, "..."); | ||
| width = boundingRect.width() + labelPadding(); | ||||
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r2131 | width += base.width(); | ||
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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: { | ||
| int labelWidth = 0; | ||||
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r2443 | int firstHeight = -1; | ||
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r2412 | foreach (const QString& s, ticksList) { | ||
| QRect rect = labelBoundingRect(fn, s); | ||||
| labelWidth = qMax(rect.width(), labelWidth); | ||||
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r2443 | height = rect.height(); | ||
| if (firstHeight < 0) | ||||
| firstHeight = height; | ||||
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r2412 | } | ||
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r2336 | width = labelWidth + labelPadding() + 2; //two pixels of tolerance | ||
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r2131 | width += base.width(); | ||
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r2443 | height = qMax(height, qreal(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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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 | ||