|
|
#include "piesliceitem_p.h"
|
|
|
#include "piechartitem_p.h"
|
|
|
#include "qpieseries.h"
|
|
|
#include "qpieslice.h"
|
|
|
#include "chartpresenter_p.h"
|
|
|
#include <QPainter>
|
|
|
#include <QDebug>
|
|
|
#include <qmath.h>
|
|
|
#include <QGraphicsSceneEvent>
|
|
|
#include <QTime>
|
|
|
|
|
|
QTCOMMERCIALCHART_BEGIN_NAMESPACE
|
|
|
|
|
|
#define PI 3.14159265 // TODO: is this defined in some header?
|
|
|
|
|
|
QPointF offset(qreal angle, qreal length)
|
|
|
{
|
|
|
qreal dx = qSin(angle*(PI/180)) * length;
|
|
|
qreal dy = qCos(angle*(PI/180)) * length;
|
|
|
return QPointF(dx, -dy);
|
|
|
}
|
|
|
|
|
|
PieSliceItem::PieSliceItem(QGraphicsItem* parent)
|
|
|
:QGraphicsObject(parent)
|
|
|
{
|
|
|
setAcceptHoverEvents(true);
|
|
|
setAcceptedMouseButtons(Qt::MouseButtonMask);
|
|
|
setZValue(ChartPresenter::PieSeriesZValue);
|
|
|
}
|
|
|
|
|
|
PieSliceItem::~PieSliceItem()
|
|
|
{
|
|
|
|
|
|
}
|
|
|
|
|
|
QRectF PieSliceItem::boundingRect() const
|
|
|
{
|
|
|
return m_boundingRect;
|
|
|
}
|
|
|
|
|
|
QPainterPath PieSliceItem::shape() const
|
|
|
{
|
|
|
// Don't include the label and label arm.
|
|
|
// This is used to detect a mouse clicks. We do not want clicks from label.
|
|
|
return m_slicePath;
|
|
|
}
|
|
|
|
|
|
void PieSliceItem::paint(QPainter* painter, const QStyleOptionGraphicsItem* /*option*/, QWidget* /*widget*/)
|
|
|
{
|
|
|
painter->setClipRect(parentItem()->boundingRect());
|
|
|
|
|
|
painter->save();
|
|
|
painter->setPen(m_data.m_slicePen);
|
|
|
painter->setBrush(m_data.m_sliceBrush);
|
|
|
painter->drawPath(m_slicePath);
|
|
|
painter->restore();
|
|
|
|
|
|
if (m_data.m_isLabelVisible) {
|
|
|
painter->setPen(m_data.m_labelPen);
|
|
|
painter->drawPath(m_labelArmPath);
|
|
|
// the pen color will affect the font color as well
|
|
|
painter->setFont(m_data.m_labelFont);
|
|
|
painter->drawText(m_labelTextRect.bottomLeft(), m_data.m_labelText);
|
|
|
}
|
|
|
}
|
|
|
|
|
|
void PieSliceItem::hoverEnterEvent(QGraphicsSceneHoverEvent* /*event*/)
|
|
|
{
|
|
|
emit hoverEnter();
|
|
|
}
|
|
|
|
|
|
void PieSliceItem::hoverLeaveEvent(QGraphicsSceneHoverEvent* /*event*/)
|
|
|
{
|
|
|
emit hoverLeave();
|
|
|
}
|
|
|
|
|
|
void PieSliceItem::mousePressEvent(QGraphicsSceneMouseEvent *event)
|
|
|
{
|
|
|
emit clicked(event->buttons());
|
|
|
}
|
|
|
|
|
|
void PieSliceItem::setSliceData(PieSliceData sliceData)
|
|
|
{
|
|
|
m_data = sliceData;
|
|
|
}
|
|
|
|
|
|
void PieSliceItem::updateGeometry()
|
|
|
{
|
|
|
if (m_data.m_radius <= 0)
|
|
|
return;
|
|
|
|
|
|
prepareGeometryChange();
|
|
|
|
|
|
// update slice path
|
|
|
qreal centerAngle;
|
|
|
QPointF armStart;
|
|
|
m_slicePath = slicePath(m_data.m_center, m_data.m_radius, m_data.m_startAngle, m_data.m_angleSpan, ¢erAngle, &armStart);
|
|
|
|
|
|
// update text rect
|
|
|
m_labelTextRect = labelTextRect(m_data.m_labelFont, m_data.m_labelText);
|
|
|
|
|
|
// update label arm path
|
|
|
QPointF labelTextStart;
|
|
|
m_labelArmPath = labelArmPath(armStart, centerAngle, m_data.m_radius * m_data.m_labelArmLengthFactor, m_labelTextRect.width(), &labelTextStart);
|
|
|
|
|
|
// update text position
|
|
|
m_labelTextRect.moveBottomLeft(labelTextStart);
|
|
|
|
|
|
// update bounding rect
|
|
|
m_boundingRect = m_slicePath.boundingRect().united(m_labelArmPath.boundingRect()).united(m_labelTextRect);
|
|
|
}
|
|
|
|
|
|
QPointF PieSliceItem::sliceCenter(QPointF point, qreal radius, QPieSlice *slice)
|
|
|
{
|
|
|
if (slice->isExploded()) {
|
|
|
qreal centerAngle = slice->startAngle() + ((slice->endAngle() - slice->startAngle())/2);
|
|
|
qreal len = radius * slice->explodeDistanceFactor();
|
|
|
qreal dx = qSin(centerAngle*(PI/180)) * len;
|
|
|
qreal dy = -qCos(centerAngle*(PI/180)) * len;
|
|
|
point += QPointF(dx, dy);
|
|
|
}
|
|
|
return point;
|
|
|
}
|
|
|
|
|
|
QPainterPath PieSliceItem::slicePath(QPointF center, qreal radius, qreal startAngle, qreal angleSpan, qreal* centerAngle, QPointF* armStart)
|
|
|
{
|
|
|
// calculate center angle
|
|
|
*centerAngle = startAngle + (angleSpan/2);
|
|
|
|
|
|
// calculate slice rectangle
|
|
|
QRectF rect(center.x()-radius, center.y()-radius, radius*2, radius*2);
|
|
|
|
|
|
// slice path
|
|
|
// TODO: draw the shape so that it might have a hole in the center
|
|
|
QPainterPath path;
|
|
|
path.moveTo(rect.center());
|
|
|
path.arcTo(rect, -startAngle + 90, -angleSpan);
|
|
|
path.closeSubpath();
|
|
|
|
|
|
// calculate label arm start point
|
|
|
*armStart = center;
|
|
|
*armStart += offset(*centerAngle, radius + PIESLICE_LABEL_GAP);
|
|
|
|
|
|
return path;
|
|
|
}
|
|
|
|
|
|
QPainterPath PieSliceItem::labelArmPath(QPointF start, qreal angle, qreal length, qreal textWidth, QPointF* textStart)
|
|
|
{
|
|
|
qreal dx = qSin(angle*(PI/180)) * length;
|
|
|
qreal dy = -qCos(angle*(PI/180)) * length;
|
|
|
QPointF parm1 = start + QPointF(dx, dy);
|
|
|
|
|
|
QPointF parm2 = parm1;
|
|
|
if (angle < 180) { // arm swings the other way on the left side
|
|
|
parm2 += QPointF(textWidth, 0);
|
|
|
*textStart = parm1;
|
|
|
}
|
|
|
else {
|
|
|
parm2 += QPointF(-textWidth,0);
|
|
|
*textStart = parm2;
|
|
|
}
|
|
|
|
|
|
// elevate the text position a bit so that it does not hit the line
|
|
|
*textStart += QPointF(0, -5);
|
|
|
|
|
|
QPainterPath path;
|
|
|
path.moveTo(start);
|
|
|
path.lineTo(parm1);
|
|
|
path.lineTo(parm2);
|
|
|
|
|
|
return path;
|
|
|
}
|
|
|
|
|
|
QRectF PieSliceItem::labelTextRect(QFont font, QString text)
|
|
|
{
|
|
|
QFontMetricsF fm(font);
|
|
|
return fm.boundingRect(text);
|
|
|
}
|
|
|
|
|
|
#include "moc_piesliceitem_p.cpp"
|
|
|
|
|
|
QTCOMMERCIALCHART_END_NAMESPACE
|
|
|
|
