|
|
/****************************************************************************
|
|
|
**
|
|
|
** Copyright (C) 2013 Digia Plc
|
|
|
** 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 "chartlogvalueaxisy_p.h"
|
|
|
#include "chartpresenter_p.h"
|
|
|
#include "qlogvalueaxis.h"
|
|
|
#include "chartlayout_p.h"
|
|
|
#include <QGraphicsLayout>
|
|
|
#include <QFontMetrics>
|
|
|
#include <qmath.h>
|
|
|
#include <QDebug>
|
|
|
|
|
|
QTCOMMERCIALCHART_BEGIN_NAMESPACE
|
|
|
|
|
|
ChartLogValueAxisY::ChartLogValueAxisY(QLogValueAxis *axis, QGraphicsItem* item)
|
|
|
: VerticalAxis(axis, item),
|
|
|
m_axis(axis)
|
|
|
{
|
|
|
QObject::connect(m_axis, SIGNAL(baseChanged(qreal)),this, SLOT(handleBaseChanged(qreal)));
|
|
|
QObject::connect(m_axis,SIGNAL(labelFormatChanged(QString)),this, SLOT(handleLabelFormatChanged(QString)));
|
|
|
}
|
|
|
|
|
|
ChartLogValueAxisY::~ChartLogValueAxisY()
|
|
|
{
|
|
|
}
|
|
|
|
|
|
QVector<qreal> ChartLogValueAxisY::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());
|
|
|
qreal leftEdge = logMin < logMax ? logMin : logMax;
|
|
|
qreal ceilEdge = ceil(leftEdge);
|
|
|
int tickCount = qAbs(ceil(logMax) - ceil(logMin));
|
|
|
|
|
|
points.resize(tickCount);
|
|
|
const QRectF &gridRect = gridGeometry();
|
|
|
const qreal deltaY = gridRect.height() / qAbs(logMax - logMin);
|
|
|
for (int i = 0; i < tickCount; ++i)
|
|
|
points[i] = (ceilEdge + i) * -deltaY - leftEdge * -deltaY + gridRect.bottom();
|
|
|
|
|
|
return points;
|
|
|
}
|
|
|
|
|
|
|
|
|
void ChartLogValueAxisY::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()));
|
|
|
VerticalAxis::updateGeometry();
|
|
|
}
|
|
|
|
|
|
void ChartLogValueAxisY::handleBaseChanged(qreal base)
|
|
|
{
|
|
|
Q_UNUSED(base);
|
|
|
QGraphicsLayoutItem::updateGeometry();
|
|
|
if(presenter()) presenter()->layout()->invalidate();
|
|
|
}
|
|
|
|
|
|
void ChartLogValueAxisY::handleLabelFormatChanged(const QString &format)
|
|
|
{
|
|
|
Q_UNUSED(format);
|
|
|
QGraphicsLayoutItem::updateGeometry();
|
|
|
if(presenter()) presenter()->layout()->invalidate();
|
|
|
}
|
|
|
|
|
|
QSizeF ChartLogValueAxisY::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
|
|
|
{
|
|
|
Q_UNUSED(constraint)
|
|
|
|
|
|
QFontMetrics fn(font());
|
|
|
QSizeF sh;
|
|
|
|
|
|
QSizeF base = VerticalAxis::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());
|
|
|
int tickCount = qAbs(ceil(logMax) - ceil(logMin));
|
|
|
if (m_axis->max() > m_axis->min() && tickCount > 0)
|
|
|
ticksList = createLogValueLabels(m_axis->min(), m_axis->max(), m_axis->base(), tickCount, m_axis->labelFormat());
|
|
|
else
|
|
|
ticksList.append(QString(" "));
|
|
|
qreal width = 0;
|
|
|
// Height of vertical axis sizeHint indicates the maximum distance labels can extend past
|
|
|
// first and last ticks. Base height is irrelevant.
|
|
|
qreal height = 0;
|
|
|
|
|
|
switch (which) {
|
|
|
case Qt::MinimumSize: {
|
|
|
QRectF boundingRect = labelBoundingRect(fn, "...");
|
|
|
width = boundingRect.width() + labelPadding();
|
|
|
width += base.width();
|
|
|
height = boundingRect.height() / 2.0;
|
|
|
sh = QSizeF(width, height);
|
|
|
break;
|
|
|
}
|
|
|
case Qt::PreferredSize: {
|
|
|
int labelWidth = 0;
|
|
|
int firstHeight = -1;
|
|
|
foreach (const QString& s, ticksList) {
|
|
|
QRect rect = labelBoundingRect(fn, s);
|
|
|
labelWidth = qMax(rect.width(), labelWidth);
|
|
|
height = rect.height();
|
|
|
if (firstHeight < 0)
|
|
|
firstHeight = height;
|
|
|
}
|
|
|
width = labelWidth + labelPadding() + 2; //two pixels of tolerance
|
|
|
width += base.width();
|
|
|
height = qMax(height, qreal(firstHeight)) / 2.0;
|
|
|
sh = QSizeF(width, height);
|
|
|
break;
|
|
|
}
|
|
|
default:
|
|
|
break;
|
|
|
}
|
|
|
|
|
|
return sh;
|
|
|
}
|
|
|
|
|
|
#include "moc_chartlogvalueaxisy_p.cpp"
|
|
|
|
|
|
QTCOMMERCIALCHART_END_NAMESPACE
|
|
|
|
