|
|
#include "pieslice.h"
|
|
|
#include <QPainter>
|
|
|
#include <QDebug>
|
|
|
|
|
|
QTCOMMERCIALCHART_BEGIN_NAMESPACE
|
|
|
|
|
|
PieSlice::PieSlice(const QColor& color, qreal startAngle, qreal span, QRectF rect)
|
|
|
: m_color(color),
|
|
|
m_startAngle(startAngle),
|
|
|
m_span(span),
|
|
|
m_rect(rect)
|
|
|
{
|
|
|
setAcceptHoverEvents(true);
|
|
|
}
|
|
|
|
|
|
PieSlice::~PieSlice()
|
|
|
{
|
|
|
}
|
|
|
|
|
|
QRectF PieSlice::boundingRect() const
|
|
|
{
|
|
|
return m_rect;
|
|
|
}
|
|
|
|
|
|
QPainterPath PieSlice::shape() const
|
|
|
{
|
|
|
qreal angle = (-m_startAngle) + (90);
|
|
|
qreal span = -m_span;
|
|
|
|
|
|
QPainterPath path;
|
|
|
path.moveTo(boundingRect().center());
|
|
|
path.arcTo(boundingRect(), angle, span);
|
|
|
|
|
|
// TODO: draw the shape so that it might have a hole in the center
|
|
|
// - Sin & Cos will be needed to find inner/outer arc endpoints
|
|
|
|
|
|
// dx, dy are offsets from the center
|
|
|
//qreal l = boundingRect().height();
|
|
|
//qreal dx = qSin(angle*(M_PI/180)) * l;
|
|
|
//qreal dy = qCos(angle*(M_PI/180)) * l;
|
|
|
|
|
|
// TODO: exploded slice?
|
|
|
|
|
|
return path;
|
|
|
}
|
|
|
|
|
|
void PieSlice::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
|
|
|
{
|
|
|
// Setup painter
|
|
|
painter->setBrush(m_color);
|
|
|
QPen pen;
|
|
|
//pen.setColor(m_color.darker());
|
|
|
pen.setColor(Qt::gray);
|
|
|
pen.setWidth(1);
|
|
|
painter->setPen(pen);
|
|
|
|
|
|
// From Qt docs:
|
|
|
// The startAngle and spanAngle must be specified in 1/16th of a degree, i.e. a full circle equals 5760 (16 * 360).
|
|
|
// Positive values for the angles mean counter-clockwise while negative values mean the clockwise direction.
|
|
|
// Zero degrees is at the 3 o'clock position.
|
|
|
//
|
|
|
// For sake of simplicity convert this so that zero degrees is at 12 o'clock and full circle is 360.
|
|
|
//qreal angle = (-m_startAngle*16) + (90*16);
|
|
|
//qreal span = -m_span*16;
|
|
|
//painter->drawPie(boundingRect(), angle, span);
|
|
|
|
|
|
painter->drawPath(shape());
|
|
|
}
|
|
|
|
|
|
void PieSlice::hoverEnterEvent(QGraphicsSceneHoverEvent * event)
|
|
|
{
|
|
|
QGraphicsItem::hoverEnterEvent(event);
|
|
|
qDebug() << "hover" << m_color << m_startAngle << m_span;
|
|
|
}
|
|
|
|
|
|
QTCOMMERCIALCHART_END_NAMESPACE
|
|
|
|
