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Make pie work better with chartwidgettest
Make pie work better with chartwidgettest
Jani Honkonen - - Load All Authors

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r163:daab1c215b03
r163:daab1c215b03
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pieslice.cpp
122 lines | 2.9 KiB | text/x-c | CppLexer
/ src / piechart / pieslice.cpp
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Tero Ahola
Integrated draft version of pie series
 r51 #include "pieslice.h"
Jani Honkonen
Moved pie stuff to own .pri file and rename stuff
 r146 #include "piepresenter.h"
Jani Honkonen
Use signals from pieseries, visible hover and exploding slices
 r157 #include "qpieseries.h"
Tero Ahola
Integrated draft version of pie series
 r51 #include <QPainter>
#include <QDebug>
Jani Honkonen
Use signals from pieseries, visible hover and exploding slices
 r157 #include <qmath.h>
Jani Honkonen
Make pie work better with chartwidgettest
 r163 #include <QGraphicsSceneEvent>
Tero Ahola
Integrated draft version of pie series
 r51
QTCOMMERCIALCHART_BEGIN_NAMESPACE
Jani Honkonen
Use signals from pieseries, visible hover and exploding slices
 r157 #define PI 3.14159265
#define EXPLODE_OFFSET 20
QPointF offset(qreal angle, qreal length)
{
qreal dx = qSin(angle*(PI/180)) * length;
qreal dy = qCos(angle*(PI/180)) * length;
return QPointF(dx, -dy);
}
PieSlice::PieSlice(PiePresenter *presenter, int seriesIndex, qreal startAngle, qreal span)
:QGraphicsItem(presenter),
m_label(new QGraphicsTextItem(this)),
Jani Honkonen
Pie chart refactoring
 r142 m_seriesIndex(seriesIndex),
Tero Ahola
Integrated draft version of pie series
 r51 m_startAngle(startAngle),
Jani Honkonen
Pie chart refactoring
 r142 m_span(span)
Tero Ahola
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 r51 {
Jani Honkonen
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 r157 Q_ASSERT(presenter);
Tero Ahola
Integrated draft version of pie series
 r51 setAcceptHoverEvents(true);
Jani Honkonen
Pie chart refactoring
 r142 setAcceptedMouseButtons(Qt::LeftButton);
Jani Honkonen
Use signals from pieseries, visible hover and exploding slices
 r157 updateGeometry();
// TODO: use themes
m_pen = QPen(Qt::black);
m_brush = QBrush(sliceData().m_color);
Tero Ahola
Integrated draft version of pie series
 r51 }
PieSlice::~PieSlice()
{
}
QRectF PieSlice::boundingRect() const
{
Jani Honkonen
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 r157 return m_rect;
Tero Ahola
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 r51 }
QPainterPath PieSlice::shape() const
{
Jani Honkonen
Use signals from pieseries, visible hover and exploding slices
 r157 return m_path;
Tero Ahola
Integrated draft version of pie series
 r51 }
Jani Honkonen
Pie chart refactoring
 r142 void PieSlice::paint(QPainter* painter, const QStyleOptionGraphicsItem* /*option*/, QWidget* /*widget*/)
Tero Ahola
Integrated draft version of pie series
 r51 {
Tero Ahola
Theme now affects background, enabled zoom by default in QChartWidget
 r77 painter->setRenderHint(QPainter::Antialiasing);
Jani Honkonen
Pie chart refactoring
 r142
Jani Honkonen
Use signals from pieseries, visible hover and exploding slices
 r157 // TODO: themes
painter->setPen(m_pen);
painter->setBrush(m_brush);
painter->drawPath(m_path);
Jani Honkonen
Pie chart refactoring
 r142
// Draw the label
// TODO: do this better
Jani Honkonen
Use signals from pieseries, visible hover and exploding slices
 r157 //QTextItem text;
painter->drawText(m_center, sliceData().m_label);
Tero Ahola
Integrated draft version of pie series
 r51 }
Jani Honkonen
Make pie work better with chartwidgettest
 r163 void PieSlice::hoverEnterEvent(QGraphicsSceneHoverEvent* event)
Tero Ahola
Integrated draft version of pie series
 r51 {
Jani Honkonen
Use signals from pieseries, visible hover and exploding slices
 r157 m_brush = QBrush(sliceData().m_color.lighter());
update();
}
Jani Honkonen
Make pie work better with chartwidgettest
 r163 void PieSlice::hoverLeaveEvent(QGraphicsSceneHoverEvent* /*event*/)
Jani Honkonen
Use signals from pieseries, visible hover and exploding slices
 r157 {
m_brush = QBrush(sliceData().m_color);
update();
Tero Ahola
Integrated draft version of pie series
 r51 }
Jani Honkonen
Make pie work better with chartwidgettest
 r163 void PieSlice::mousePressEvent(QGraphicsSceneMouseEvent* /*event*/)
Jani Honkonen
Pie chart refactoring
 r142 {
Jani Honkonen
Use signals from pieseries, visible hover and exploding slices
 r157 QPieSlice data = sliceData();
data.m_isExploded = !data.m_isExploded;
(static_cast<PiePresenter*>(parentItem()))->m_pieSeries->update(m_seriesIndex, data);
}
void PieSlice::updateGeometry()
{
prepareGeometryChange();
PiePresenter *presenter = static_cast<PiePresenter*>(parentItem());
QRectF rect = presenter->pieRect();
rect.adjust(EXPLODE_OFFSET, EXPLODE_OFFSET, -EXPLODE_OFFSET ,-EXPLODE_OFFSET);
qreal centerAngle = m_startAngle + (m_span/2);
if (presenter->m_pieSeries->slice(m_seriesIndex).m_isExploded) {
QPointF d = offset((centerAngle), EXPLODE_OFFSET);
rect.translate(d.x(), d.y());
}
qreal angle = (-m_startAngle) + (90);
qreal span = -m_span;
QPainterPath path;
path.moveTo(rect.center());
path.arcTo(rect, angle, span);
// TODO: draw the shape so that it might have a hole in the center
m_path = path;
m_rect = path.boundingRect();
qreal radius = rect.height() / 2;
m_center = rect.center() + offset(centerAngle, radius / 2);
Jani Honkonen
Pie chart refactoring
 r142 }
Jani Honkonen
Use signals from pieseries, visible hover and exploding slices
 r157
QPieSlice PieSlice::sliceData()
{
return (static_cast<PiePresenter*>(parentItem()))->m_pieSeries->slice(m_seriesIndex);
}
Tero Ahola
Integrated draft version of pie series
 r51 QTCOMMERCIALCHART_END_NAMESPACE