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#include "axisitem_p.h"
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#include <QPainter>
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#include <QDebug>
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#define LABEL_PADDING 5
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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AxisItem::AxisItem(AxisType type,QGraphicsItem* parent) :
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ChartItem(parent),
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m_ticks(4),
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m_type(type)
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{
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}
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AxisItem::~AxisItem()
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{
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}
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void AxisItem::setLength(int length)
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{
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QPainterPath path;
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path.moveTo(QPointF(0,0));
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path.lineTo(length,0);
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// path.lineTo(length-4,0);
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// path.lineTo(length,3);
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// path.lineTo(length-4,6);
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// path.lineTo(length-4,4);
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// path.lineTo(0,4);
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// path.lineTo(0,2);
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m_path=path;
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update();
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}
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QRectF AxisItem::boundingRect() const
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{
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return m_rect;
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}
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void AxisItem::setPlotDomain(const PlotDomain& plotDomain)
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{
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m_plotDomain = plotDomain;
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createItems();
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}
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void AxisItem::setSize(const QSizeF &size)
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{
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m_rect = QRectF(QPoint(0,0),size);
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createItems();
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}
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/*
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void AxisItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,QWidget *widget)
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{
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if (!m_rect.isValid())
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return;
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if(m_type==X_AXIS) {
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const qreal deltaX = m_rect.width() / m_ticks;
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for (int i = 0; i <= m_ticks; ++i) {
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int x = i * deltaX + m_rect.left();
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if(i==0) x--;
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if(i==m_ticks) x++;
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qreal label = m_plotDomain.m_minX + (i * m_plotDomain.spanX()
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/ m_ticks);
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painter->drawLine(x, m_rect.top()-1, x, m_rect.bottom()+1);
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// painter->drawLine(x, m_rect.bottom()-1, x, m_rect.bottom()-1 + 5);
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painter->drawText(x - 50, m_rect.bottom() + 5, 100, 20,Qt::AlignHCenter | Qt::AlignTop, QString::number(label));
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}
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}
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if(m_type==Y_AXIS) {
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const qreal deltaY = (m_rect.height()) / m_ticks;
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for (int j = 0; j <= m_ticks; ++j) {
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int y = j * -deltaY + m_rect.bottom();
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if(j==0) y++;
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if(j==m_ticks) y--;
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qreal label = m_plotDomain.m_minY + (j * m_plotDomain.spanY()
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/ m_ticks);
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painter->drawLine(m_rect.left()-1, y, m_rect.right()+1, y);
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//painter->drawLine(m_rect.left() - 5, y, m_rect.left(), y);
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//TODO : margin = 50 ;
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painter->drawText(m_rect.left() - 50, y - 10, 50 - 5, 20,
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Qt::AlignRight | Qt::AlignVCenter,
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QString::number(label));
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}
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}
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//painter->drawRect(m_rect.adjusted(0, 0, -1, -1));
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}
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*/
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void AxisItem::createItems()
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{
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//TODO: this is very inefficient handling
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qDeleteAll(m_shades);
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m_shades.clear();
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qDeleteAll(m_grid);
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m_grid.clear();
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qDeleteAll(m_labels);
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m_labels.clear();
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if(m_type==X_AXIS) {
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const qreal deltaX = m_rect.width() / m_ticks;
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for (int i = 0; i <= m_ticks; ++i) {
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int x = i * deltaX + m_rect.left();
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qreal label = m_plotDomain.m_minX + (i * m_plotDomain.spanX()/ m_ticks);
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m_grid<<new QGraphicsLineItem(x, m_rect.top(), x, m_rect.bottom(),this);
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QGraphicsSimpleTextItem* text = new QGraphicsSimpleTextItem(QString::number(label),this);
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QPointF center = text->boundingRect().center();
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text->setPos(x - center.x(), m_rect.bottom() + LABEL_PADDING);
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//text->rotate(-45);
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m_labels<<text;
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}
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}
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if(m_type==Y_AXIS) {
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const qreal deltaY = m_rect.height()/ m_ticks;
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for (int j = 0; j <= m_ticks; ++j) {
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int y = j * -deltaY + m_rect.bottom();
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qreal label = m_plotDomain.m_minY + (j * m_plotDomain.spanY()
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/ m_ticks);
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m_grid<<new QGraphicsLineItem(m_rect.left() , y, m_rect.right(), y,this);
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QGraphicsSimpleTextItem* text = new QGraphicsSimpleTextItem(QString::number(label),this);
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QPointF center = text->boundingRect().center();
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text->setPos(m_rect.left() - text->boundingRect().width() - LABEL_PADDING , y-center.y());
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//text->rotate(-45);
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m_labels<<text;
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}
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}
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//painter->drawRect(m_rect.adjusted(0, 0, -1, -1));
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}
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//TODO "nice numbers algorithm"
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QTCOMMERCIALCHART_END_NAMESPACE
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