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/****************************************************************************
**
** Copyright (C) 2012 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 <QGraphicsLayout>
#include <QFontMetrics>
#include <qmath.h>
#include <QDebug>
static int label_padding = 5;
QTCOMMERCIALCHART_BEGIN_NAMESPACE
ChartValueAxisX::ChartValueAxisX(QAbstractAxis *axis,ChartPresenter *presenter) : ChartAxis(axis,presenter),
m_tickCount(0)
{
}
ChartValueAxisX::~ChartValueAxisX()
{
}
QVector<qreal> ChartValueAxisX::calculateLayout() const
{
Q_ASSERT(m_tickCount>=2);
QVector<qreal> points;
points.resize(m_tickCount);
QRectF rect = presenter()->chartsGeometry();
const qreal deltaX = rect.width()/(m_tickCount-1);
for (int i = 0; i < m_tickCount; ++i) {
int x = i * deltaX + rect.left();
points[i] = x;
}
return points;
}
void ChartValueAxisX::updateGeometry()
{
const QVector<qreal>& layout = ChartAxis::layout();
if(layout.isEmpty()) return;
QStringList ticksList = createNumberLabels(m_min,m_max,layout.size());
QList<QGraphicsItem *> lines = m_grid->childItems();
QList<QGraphicsItem *> labels = m_labels->childItems();
QList<QGraphicsItem *> shades = m_shades->childItems();
QList<QGraphicsItem *> axis = m_arrow->childItems();
Q_ASSERT(labels.size() == ticksList.size());
Q_ASSERT(layout.size() == ticksList.size());
QRectF chartRrect = presenter()->chartsGeometry();
QGraphicsLineItem *lineItem = static_cast<QGraphicsLineItem*>(axis.at(0));
// lineItem->setLine(chartRrect.left(), chartRrect.bottom(), chartRrect.right(), chartRrect.bottom());
if (m_chartAxis->alternativePlacement())
lineItem->setLine(chartRrect.left(), m_internalRect.top(), chartRrect.right(), m_internalRect.top());
else
lineItem->setLine(chartRrect.left(), m_internalRect.bottom(), chartRrect.right(), m_internalRect.bottom());
qreal width = 0;
for (int i = 0; i < layout.size(); ++i) {
QGraphicsLineItem *lineItem = static_cast<QGraphicsLineItem*>(lines.at(i));
lineItem->setLine(layout[i], chartRrect.top(), layout[i], chartRrect.bottom());
QGraphicsSimpleTextItem *labelItem = static_cast<QGraphicsSimpleTextItem*>(labels.at(i));
labelItem->setText(ticksList.at(i));
const QRectF& rect = labelItem->boundingRect();
QPointF center = rect.center();
labelItem->setTransformOriginPoint(center.x(), center.y());
// labelItem->setPos(layout[i] - center.x(), chartRrect.bottom() + label_padding);
if (m_chartAxis->alternativePlacement())
labelItem->setPos(layout[i] - center.x(), m_internalRect.top() - rect.height() - label_padding);
else
labelItem->setPos(layout[i] - center.x(), m_internalRect.bottom() + label_padding);
if(labelItem->pos().x() <= width ||
labelItem->pos().x() < m_rect.left() ||
labelItem->pos().x() + rect.width() > m_rect.right()){
labelItem->setVisible(false);
lineItem->setVisible(false);
}else{
labelItem->setVisible(true);
lineItem->setVisible(true);
width=rect.width()+labelItem->pos().x();
}
if ((i+1)%2 && i>1) {
QGraphicsRectItem *rectItem = static_cast<QGraphicsRectItem*>(shades.at(i/2-1));
rectItem->setRect(layout[i-1],chartRrect.top(),layout[i]-layout[i-1],chartRrect.height());
}
lineItem = static_cast<QGraphicsLineItem*>(axis.at(i+1));
// lineItem->setLine(layout[i],chartRrect.bottom(),layout[i],chartRrect.bottom()+5);
if (m_chartAxis->alternativePlacement())
lineItem->setLine(layout[i],m_internalRect.top(),layout[i],m_internalRect.top()-5);
else
lineItem->setLine(layout[i],m_internalRect.bottom(),layout[i],m_internalRect.bottom()+5);
}
}
void ChartValueAxisX::handleAxisUpdated()
{
//TODO:: fix this
QValueAxis* axis = qobject_cast<QValueAxis*>(m_chartAxis);
m_tickCount = axis->tickCount();
ChartAxis::handleAxisUpdated();
}
QSizeF ChartValueAxisX::sizeHint(Qt::SizeHint which, const QSizeF& constraint) const
{
Q_UNUSED(constraint)
QFontMetrics fn(m_font);
QSizeF sh;
QSizeF base = ChartAxis::sizeHint(which, constraint);
QStringList ticksList = createNumberLabels(m_min,m_max,m_tickCount);
qreal width=0;
qreal height=0;
switch (which) {
case Qt::MinimumSize:{
int count = qMax(ticksList.last().count(),ticksList.first().count());
width=fn.averageCharWidth()*count;
height=fn.height()+label_padding;
width=qMax(width,base.width());
height+=base.height();
sh = QSizeF(width,height);
break;
}
case Qt::PreferredSize:{
for (int i = 0; i < ticksList.size(); ++i)
{
width+=fn.averageCharWidth()*ticksList.at(i).count();
}
height=fn.height()+label_padding;
width=qMax(width,base.width());
height+=base.height();
sh = QSizeF(width,height);
break;
}
default:
break;
}
return sh;
}
QTCOMMERCIALCHART_END_NAMESPACE
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