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/****************************************************************************
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**
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** Copyright (C) 2012 Digia Plc
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** All rights reserved.
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** For any questions to Digia, please use contact form at http://qt.digia.com
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**
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** This file is part of the Qt Commercial Charts Add-on.
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**
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** $QT_BEGIN_LICENSE$
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt Commercial License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Digia.
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**
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** If you have questions regarding the use of this file, please use
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** contact form at http://qt.digia.com
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "chartdatetimeaxisx_p.h"
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#include "chartpresenter_p.h"
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#include "qdatetimeaxis.h"
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#include <QGraphicsLayout>
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#include <QDateTime>
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#include <QFontMetrics>
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#include <qmath.h>
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static int label_padding = 5;
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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ChartDateTimeAxisX::ChartDateTimeAxisX(QDateTimeAxis *axis,ChartPresenter *presenter) : HorizontalAxis(axis,presenter),
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m_tickCount(0),m_axis(axis)
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{
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}
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ChartDateTimeAxisX::~ChartDateTimeAxisX()
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{
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}
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QVector<qreal> ChartDateTimeAxisX::calculateLayout() const
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{
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Q_ASSERT(m_tickCount>=2);
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QVector<qreal> points;
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points.resize(m_tickCount);
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const QRectF& gridRect = gridGeometry();
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const qreal deltaX = gridRect.width()/(m_tickCount-1);
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for (int i = 0; i < m_tickCount; ++i) {
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int x = i * deltaX + gridRect.left();
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points[i] = x;
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}
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return points;
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}
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void ChartDateTimeAxisX::updateGeometry()
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{
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const QVector<qreal>& layout = ChartAxis::layout();
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if(layout.isEmpty()) return;
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setLabels(createDateTimeLabels(m_axis->format(),layout.size()));
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HorizontalAxis::updateGeometry();
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}
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void ChartDateTimeAxisX::handleAxisUpdated()
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{
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m_tickCount = m_axis->tickCount();
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ChartAxis::handleAxisUpdated();
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}
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QSizeF ChartDateTimeAxisX::sizeHint(Qt::SizeHint which, const QSizeF& constraint) const
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{
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Q_UNUSED(constraint)
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QFontMetrics fn(font());
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QSizeF sh;
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switch (which) {
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case Qt::MinimumSize:
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sh = QSizeF(fn.boundingRect("...").width(),fn.height());
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break;
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case Qt::PreferredSize:{
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const QVector<qreal>& layout = ChartAxis::layout();
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if(layout.isEmpty()) break;
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QStringList ticksList;
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qreal width=0;
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qreal height=0;
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for (int i = 0; i < ticksList.size(); ++i)
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{
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QRectF rect = fn.boundingRect(ticksList.at(i));
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width+=rect.width();
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height+=qMax(rect.height()+label_padding,height);
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}
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sh = QSizeF(width,height);
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break;
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}
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default:
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break;
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}
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return sh;
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}
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QTCOMMERCIALCHART_END_NAMESPACE
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