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/****************************************************************************
**
** 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 "chartvalueaxisx_p.h"
#include "qabstractaxis.h"
#include "chartpresenter_p.h"
#include "qvalueaxis.h"
#include "chartlayout_p.h"
#include <QGraphicsLayout>
#include <QFontMetrics>
#include <qmath.h>
#include <QDebug>
QTCOMMERCIALCHART_BEGIN_NAMESPACE
ChartValueAxisX::ChartValueAxisX(QValueAxis *axis, QGraphicsItem* item )
: HorizontalAxis(axis, item),
m_axis(axis)
{
QObject::connect(m_axis,SIGNAL(tickCountChanged(int)),this, SLOT(handleTickCountChanged(int)));
QObject::connect(m_axis,SIGNAL(labelFormatChanged(QString)),this, SLOT(handleLabelFormatChanged(QString)));
}
ChartValueAxisX::~ChartValueAxisX()
{
}
QVector<qreal> ChartValueAxisX::calculateLayout() const
{
int tickCount = m_axis->tickCount();
Q_ASSERT(tickCount >= 2);
QVector<qreal> points;
points.resize(tickCount);
const QRectF &gridRect = gridGeometry();
const qreal deltaX = gridRect.width() / (tickCount - 1);
for (int i = 0; i < tickCount; ++i) {
points[i] = i * deltaX + gridRect.left();
}
return points;
}
void ChartValueAxisX::updateGeometry()
{
const QVector<qreal>& layout = ChartAxis::layout();
if (layout.isEmpty())
return;
setLabels(createValueLabels(min(),max(),layout.size(),m_axis->labelFormat()));
HorizontalAxis::updateGeometry();
}
void ChartValueAxisX::handleTickCountChanged(int tick)
{
Q_UNUSED(tick);
QGraphicsLayoutItem::updateGeometry();
if(presenter()) presenter()->layout()->invalidate();
}
void ChartValueAxisX::handleLabelFormatChanged(const QString &format)
{
Q_UNUSED(format);
QGraphicsLayoutItem::updateGeometry();
if(presenter()) presenter()->layout()->invalidate();
}
QSizeF ChartValueAxisX::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
{
Q_UNUSED(constraint)
QFontMetrics fn(font());
QSizeF sh;
QSizeF base = HorizontalAxis::sizeHint(which, constraint);
QStringList ticksList = createValueLabels(min(),max(),m_axis->tickCount(),m_axis->labelFormat());
qreal width = 0;
qreal height = 0;
switch (which) {
case Qt::MinimumSize: {
QRectF boundingRect = labelBoundingRect(fn, "...");
width = qMax(boundingRect.width(), base.width());
height = boundingRect.height() + labelPadding();
height += base.height();
sh = QSizeF(width, height);
break;
}
case Qt::PreferredSize: {
int labelHeight = 0;
foreach (const QString& s, ticksList) {
QRect rect = labelBoundingRect(fn, s);
labelHeight = qMax(rect.height(), labelHeight);
width += rect.width();
}
height = labelHeight + labelPadding();
height += base.height();
width = qMax(width, base.width());
sh = QSizeF(width, height);
break;
}
default:
break;
}
return sh;
}
#include "moc_chartvalueaxisx_p.cpp"
QTCOMMERCIALCHART_END_NAMESPACE
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