chartlogvalueaxisx.cpp
141 lines
| 4.5 KiB
| text/x-c
|
CppLexer
Marek Rosa
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r2274 | /**************************************************************************** | ||
** | ||||
Miikka Heikkinen
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r2432 | ** Copyright (C) 2013 Digia Plc | ||
Marek Rosa
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r2274 | ** 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 "chartlogvalueaxisx_p.h" | ||||
#include "chartpresenter_p.h" | ||||
#include "qlogvalueaxis.h" | ||||
#include "chartlayout_p.h" | ||||
#include <QGraphicsLayout> | ||||
#include <QFontMetrics> | ||||
#include <qmath.h> | ||||
Michal Klocek
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r2333 | #include <QDebug> | ||
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r2274 | |||
QTCOMMERCIALCHART_BEGIN_NAMESPACE | ||||
ChartLogValueAxisX::ChartLogValueAxisX(QLogValueAxis *axis, QGraphicsItem* item) | ||||
: HorizontalAxis(axis, item), | ||||
m_axis(axis) | ||||
{ | ||||
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r2322 | QObject::connect(m_axis,SIGNAL(baseChanged(qreal)),this, SLOT(handleBaseChanged(qreal))); | ||
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r2323 | QObject::connect(m_axis,SIGNAL(labelFormatChanged(QString)),this, SLOT(handleLabelFormatChanged(QString))); | ||
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r2274 | } | ||
ChartLogValueAxisX::~ChartLogValueAxisX() | ||||
{ | ||||
} | ||||
QVector<qreal> ChartLogValueAxisX::calculateLayout() const | ||||
{ | ||||
QVector<qreal> points; | ||||
qreal logMax = log10(m_axis->max()) / log10(m_axis->base()); | ||||
qreal logMin = log10(m_axis->min()) / log10(m_axis->base()); | ||||
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r2275 | qreal leftEdge = logMin < logMax ? logMin : logMax; | ||
qreal ceilEdge = ceil(leftEdge); | ||||
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r2372 | int tickCount = qAbs(ceil(logMax) - ceil(logMin)); | ||
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r2274 | |||
points.resize(tickCount); | ||||
const QRectF &gridRect = gridGeometry(); | ||||
const qreal deltaX = gridRect.width() / qAbs(logMax - logMin); | ||||
for (int i = 0; i < tickCount; ++i) | ||||
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r2275 | points[i] = (ceilEdge + i) * deltaX - leftEdge * deltaX + gridRect.left(); | ||
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r2274 | |||
return points; | ||||
} | ||||
void ChartLogValueAxisX::updateGeometry() | ||||
{ | ||||
const QVector<qreal>& layout = ChartAxis::layout(); | ||||
if (layout.isEmpty()) | ||||
return; | ||||
setLabels(createLogValueLabels(m_axis->min(), m_axis->max(), m_axis->base(), layout.size(), m_axis->labelFormat())); | ||||
HorizontalAxis::updateGeometry(); | ||||
} | ||||
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r2322 | void ChartLogValueAxisX::handleBaseChanged(qreal base) | ||
{ | ||||
Q_UNUSED(base); | ||||
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r2333 | QGraphicsLayoutItem::updateGeometry(); | ||
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r2322 | if(presenter()) presenter()->layout()->invalidate(); | ||
} | ||||
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r2274 | |||
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r2323 | void ChartLogValueAxisX::handleLabelFormatChanged(const QString &format) | ||
{ | ||||
Q_UNUSED(format); | ||||
Michal Klocek
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r2333 | QGraphicsLayoutItem::updateGeometry(); | ||
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r2323 | if(presenter()) presenter()->layout()->invalidate(); | ||
} | ||||
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r2274 | QSizeF ChartLogValueAxisX::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const | ||
{ | ||||
Q_UNUSED(constraint) | ||||
QFontMetrics fn(font()); | ||||
QSizeF sh; | ||||
QSizeF base = HorizontalAxis::sizeHint(which, constraint); | ||||
QStringList ticksList; | ||||
qreal logMax = log10(m_axis->max()) / log10(m_axis->base()); | ||||
qreal logMin = log10(m_axis->min()) / log10(m_axis->base()); | ||||
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r2370 | int tickCount = qAbs(ceil(logMax) - ceil(logMin)); | ||
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r2460 | if (m_axis->max() > m_axis->min() && tickCount > 0) | ||
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r2274 | ticksList = createLogValueLabels(m_axis->min(), m_axis->max(), m_axis->base(), tickCount, m_axis->labelFormat()); | ||
else | ||||
ticksList.append(QString(" ")); | ||||
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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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r2274 | qreal width = 0; | ||
qreal height = 0; | ||||
switch (which) { | ||||
case Qt::MinimumSize:{ | ||||
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r2412 | QRectF boundingRect = labelBoundingRect(fn, "..."); | ||
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r2443 | width = boundingRect.width() / 2.0; | ||
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r2412 | height = boundingRect.height() + labelPadding(); | ||
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r2274 | height += base.height(); | ||
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r2412 | sh = QSizeF(width, height); | ||
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r2274 | break; | ||
} | ||||
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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r2274 | break; | ||
} | ||||
default: | ||||
break; | ||||
} | ||||
return sh; | ||||
} | ||||
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r2322 | #include "moc_chartlogvalueaxisx_p.cpp" | ||
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r2274 | QTCOMMERCIALCHART_END_NAMESPACE | ||