|
|
/****************************************************************************
|
|
|
**
|
|
|
** 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 Enterprise Charts Add-on.
|
|
|
**
|
|
|
** $QT_BEGIN_LICENSE$
|
|
|
** Licensees holding valid Qt Enterprise licenses may use this file in
|
|
|
** accordance with the Qt Enterprise 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 "chartdatetimeaxisx_p.h"
|
|
|
#include "chartpresenter_p.h"
|
|
|
#include "qdatetimeaxis.h"
|
|
|
#include "abstractchartlayout_p.h"
|
|
|
#include <QGraphicsLayout>
|
|
|
#include <QDateTime>
|
|
|
#include <qmath.h>
|
|
|
|
|
|
QTCOMMERCIALCHART_BEGIN_NAMESPACE
|
|
|
|
|
|
ChartDateTimeAxisX::ChartDateTimeAxisX(QDateTimeAxis *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(formatChanged(QString)), this, SLOT(handleFormatChanged(QString)));
|
|
|
}
|
|
|
|
|
|
ChartDateTimeAxisX::~ChartDateTimeAxisX()
|
|
|
{
|
|
|
}
|
|
|
|
|
|
QVector<qreal> ChartDateTimeAxisX::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() / (qreal(tickCount) - 1.0);
|
|
|
for (int i = 0; i < tickCount; ++i)
|
|
|
points[i] = qreal(i) * deltaX + gridRect.left();
|
|
|
return points;
|
|
|
}
|
|
|
|
|
|
void ChartDateTimeAxisX::updateGeometry()
|
|
|
{
|
|
|
const QVector<qreal>& layout = ChartAxisElement::layout();
|
|
|
if (layout.isEmpty())
|
|
|
return;
|
|
|
setLabels(createDateTimeLabels(min(), max(), layout.size(), m_axis->format()));
|
|
|
HorizontalAxis::updateGeometry();
|
|
|
}
|
|
|
|
|
|
void ChartDateTimeAxisX::handleTickCountChanged(int tick)
|
|
|
{
|
|
|
Q_UNUSED(tick)
|
|
|
QGraphicsLayoutItem::updateGeometry();
|
|
|
if (presenter())
|
|
|
presenter()->layout()->invalidate();
|
|
|
}
|
|
|
|
|
|
void ChartDateTimeAxisX::handleFormatChanged(const QString &format)
|
|
|
{
|
|
|
Q_UNUSED(format);
|
|
|
QGraphicsLayoutItem::updateGeometry();
|
|
|
if (presenter())
|
|
|
presenter()->layout()->invalidate();
|
|
|
}
|
|
|
|
|
|
QSizeF ChartDateTimeAxisX::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
|
|
|
{
|
|
|
Q_UNUSED(constraint)
|
|
|
|
|
|
QSizeF sh;
|
|
|
|
|
|
QSizeF base = HorizontalAxis::sizeHint(which, constraint);
|
|
|
QStringList ticksList = createDateTimeLabels(min(), max(), m_axis->tickCount(), m_axis->format());
|
|
|
// Width of horizontal axis sizeHint indicates the maximum distance labels can extend past
|
|
|
// first and last ticks. Base width is irrelevant.
|
|
|
qreal width = 0;
|
|
|
qreal height = 0;
|
|
|
|
|
|
if (ticksList.empty())
|
|
|
return sh;
|
|
|
|
|
|
switch (which) {
|
|
|
case Qt::MinimumSize: {
|
|
|
QRectF boundingRect = ChartPresenter::textBoundingRect(axis()->labelsFont(), "...", axis()->labelsAngle());
|
|
|
width = boundingRect.width() / 2.0;
|
|
|
height = boundingRect.height() + labelPadding() + base.height() + 1.0;
|
|
|
sh = QSizeF(width, height);
|
|
|
break;
|
|
|
}
|
|
|
case Qt::PreferredSize: {
|
|
|
qreal labelHeight = 0.0;
|
|
|
qreal firstWidth = -1.0;
|
|
|
foreach (const QString& s, ticksList) {
|
|
|
QRectF rect = ChartPresenter::textBoundingRect(axis()->labelsFont(), s, axis()->labelsAngle());
|
|
|
labelHeight = qMax(rect.height(), labelHeight);
|
|
|
width = rect.width();
|
|
|
if (firstWidth < 0.0)
|
|
|
firstWidth = width;
|
|
|
}
|
|
|
height = labelHeight + labelPadding() + base.height() + 1.0;
|
|
|
width = qMax(width, firstWidth) / 2.0;
|
|
|
sh = QSizeF(width, height);
|
|
|
break;
|
|
|
}
|
|
|
default:
|
|
|
break;
|
|
|
}
|
|
|
|
|
|
return sh;
|
|
|
}
|
|
|
|
|
|
#include "moc_chartdatetimeaxisx_p.cpp"
|
|
|
|
|
|
QTCOMMERCIALCHART_END_NAMESPACE
|
|
|
|
