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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 "chartvalueaxisy_p.h"
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#include "qabstractaxis.h"
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#include "chartpresenter_p.h"
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#include "qvalueaxis.h"
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#include <QGraphicsLayout>
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#include <QFontMetrics>
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#include <qmath.h>
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#include <QDebug>
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static int label_padding = 5;
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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ChartValueAxisY::ChartValueAxisY(QAbstractAxis *axis,ChartPresenter *presenter) : ChartAxis(axis,presenter),
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m_tickCount(0)
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{
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}
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ChartValueAxisY::~ChartValueAxisY()
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{
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}
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QVector<qreal> ChartValueAxisY::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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QRectF rect = presenter()->chartsGeometry();
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const qreal deltaY = rect.height()/(m_tickCount-1);
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for (int i = 0; i < m_tickCount; ++i) {
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int y = i * -deltaY + rect.bottom();
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points[i] = y;
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}
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return points;
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}
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void ChartValueAxisY::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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QStringList ticksList = createNumberLabels(m_min,m_max,layout.size());
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QList<QGraphicsItem *> lines = m_grid->childItems();
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QList<QGraphicsItem *> labels = m_labels->childItems();
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QList<QGraphicsItem *> shades = m_shades->childItems();
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QList<QGraphicsItem *> axis = m_arrow->childItems();
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Q_ASSERT(labels.size() == ticksList.size());
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Q_ASSERT(layout.size() == ticksList.size());
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QRectF chartRect = presenter()->chartsGeometry();
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qreal height = m_rect.bottom();
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QGraphicsLineItem *lineItem = static_cast<QGraphicsLineItem*>(axis.at(0));
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lineItem->setLine( chartRect.left() , chartRect.top(), chartRect.left(), chartRect.bottom());
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QFontMetrics fn(m_font);
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for (int i = 0; i < layout.size(); ++i) {
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QGraphicsLineItem *lineItem = static_cast<QGraphicsLineItem*>(lines.at(i));
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lineItem->setLine( chartRect.left() , layout[i], chartRect.right(), layout[i]);
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QGraphicsSimpleTextItem *labelItem = static_cast<QGraphicsSimpleTextItem*>(labels.at(i));
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QString text = ticksList.at(i);
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if (fn.boundingRect(text).width() > chartRect.left() - m_rect.left() - label_padding )
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{
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QString label = text + "...";
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while (fn.boundingRect(label).width() > chartRect.left() - m_rect.left() - label_padding && label.length() > 3)
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label.remove(label.length() - 4, 1);
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labelItem->setText(label);
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}else{
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labelItem->setText(text);
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}
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const QRectF& rect = labelItem->boundingRect();
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QPointF center = rect.center();
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labelItem->setTransformOriginPoint(center.x(), center.y());
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labelItem->setPos( chartRect.left() - rect.width() - label_padding , layout[i]-center.y());
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if(labelItem->pos().y() + rect.height() > height ||
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labelItem->pos().y() < m_rect.top()) {
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labelItem->setVisible(false);
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lineItem->setVisible(false);
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}else{
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labelItem->setVisible(true);
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lineItem->setVisible(true);
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height=labelItem->pos().y();
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}
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if ((i+1)%2 && i>1) {
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QGraphicsRectItem *rectItem = static_cast<QGraphicsRectItem*>(shades.at(i/2-1));
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rectItem->setRect( chartRect.left(),layout[i], chartRect.width(),layout[i-1]-layout[i]);
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}
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lineItem = static_cast<QGraphicsLineItem*>(axis.at(i+1));
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lineItem->setLine( chartRect.left()-5,layout[i], chartRect.left(),layout[i]);
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}
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}
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void ChartValueAxisY::handleAxisUpdated()
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{
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//TODO:: fix this
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QValueAxis* axis = qobject_cast<QValueAxis*>(m_chartAxis);
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m_tickCount = axis->tickCount();
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ChartAxis::handleAxisUpdated();
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}
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QSizeF ChartValueAxisY::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(m_font);
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QSizeF sh;
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QSizeF base = ChartAxis::sizeHint(which, constraint);
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QStringList ticksList = createNumberLabels(m_min,m_max,m_tickCount);
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qreal width=0;
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qreal height=0;
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switch (which) {
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case Qt::MinimumSize: {
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int count = qMax(ticksList.first().count() , ticksList.last().count());
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width=fn.averageCharWidth()*count+label_padding;
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height=fn.height();
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height=qMax(height,base.height());
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width+=base.width();
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sh = QSizeF(width,height);
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break;
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}
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case Qt::PreferredSize:
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{
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for (int i = 0; i < ticksList.size(); ++i)
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{
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width=qMax(qreal(fn.averageCharWidth()*ticksList.at(i).count())+label_padding,width);
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height+=fn.height();
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}
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height=qMax(height,base.height());
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width+=base.width();
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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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