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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 "chartbarcategoryaxisx_p.h"
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#include "chartpresenter_p.h"
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#include "qbarcategoryaxis_p.h"
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#include <QDebug>
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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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ChartBarCategoryAxisX::ChartBarCategoryAxisX(QBarCategoryAxis *axis,ChartPresenter *presenter) : ChartAxis(axis,presenter),
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m_categoriesAxis(axis)
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{
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}
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ChartBarCategoryAxisX::~ChartBarCategoryAxisX()
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{
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}
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QVector<qreal> ChartBarCategoryAxisX::calculateLayout() const
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{
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int count = m_categoriesAxis->d_ptr->count();
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Q_ASSERT(count>=1);
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QVector<qreal> points;
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points.resize(count+2);
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const qreal delta = m_rect.width()/(count);
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qreal offset =-m_min-0.5;
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if(delta<1) return points;
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if(offset<=0) {
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offset = int(offset * m_rect.width()/(m_max - m_min))%int(delta) + delta;
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}
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else {
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offset = int(offset * m_rect.width()/(m_max - m_min))%int(delta);
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}
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points[0] = m_rect.left();
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points[count+1] = m_rect.right();
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for (int i = 0; i < count; ++i) {
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qreal x = offset + i * delta + m_rect.left();
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points[i+1] = x;
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}
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return points;
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}
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QStringList ChartBarCategoryAxisX::createCategoryLabels(const QVector<qreal>& layout) const
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{
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QStringList result;
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qreal d = (m_max - m_min)/m_rect.width();
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for (int i = 0;i < layout.count()-1; ++i) {
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qreal x = qFloor((((layout[i+1] + layout[i])/2-m_rect.left())*d + m_min+0.5));
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if ((x < m_categoriesAxis->categories().count()) && (x >= 0)) {
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result << m_categoriesAxis->categories().at(x);
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}
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else {
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// No label for x coordinate
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result << "";
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}
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}
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result << "";
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return result;
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}
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void ChartBarCategoryAxisX::updateGeometry()
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{
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const QVector<qreal>& layout = ChartAxis::layout();
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m_minWidth = 0;
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m_minHeight = 0;
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if(layout.isEmpty()) return;
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QStringList ticksList = createCategoryLabels(layout);
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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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const qreal delta = m_rect.width()/(m_categoriesAxis->d_ptr->count());
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QGraphicsLineItem *lineItem = static_cast<QGraphicsLineItem*>(axis.at(0));
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lineItem->setLine(m_rect.left(), m_rect.bottom(), m_rect.right(), m_rect.bottom());
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qreal width = m_rect.left();
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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(layout[i], m_rect.top(), layout[i], m_rect.bottom());
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QGraphicsSimpleTextItem *labelItem = static_cast<QGraphicsSimpleTextItem*>(labels.at(i));
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labelItem->setText(ticksList.at(i));
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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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if(i==0){
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labelItem->setPos(layout[i+1] - (delta)/2 - center.x(), m_rect.bottom() + label_padding);
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}else{
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labelItem->setPos(layout[i] + (delta)/2 - center.x(), m_rect.bottom() + label_padding);
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}
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if(labelItem->pos().x()<=width || labelItem->pos().x()+ rect.width()>m_rect.right()) {
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labelItem->setVisible(false);
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}
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else {
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labelItem->setVisible(true);
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width=rect.width()+labelItem->pos().x();
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}
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m_minWidth+=rect.width();
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m_minHeight=qMax(rect.height()+label_padding,m_minHeight);
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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(layout[i-1],m_rect.top(),layout[i]-layout[i-1],m_rect.height());
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}
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lineItem = static_cast<QGraphicsLineItem*>(axis.at(i+1));
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lineItem->setLine(layout[i],m_rect.bottom(),layout[i],m_rect.bottom()+5);
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}
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}
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void ChartBarCategoryAxisX::handleAxisUpdated()
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{
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if(m_categoriesAxis->categories()!=m_categories)
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{
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m_categories=m_categoriesAxis->categories();
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if(ChartAxis::layout().count()==m_categoriesAxis->d_ptr->count()+2) updateGeometry();
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}
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ChartAxis::handleAxisUpdated();
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}
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QTCOMMERCIALCHART_END_NAMESPACE
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