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QML bar series categories
QML bar series categories

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piechartitem.cpp
191 lines | 5.3 KiB | text/x-c | CppLexer
#include "piechartitem_p.h"
#include "piesliceitem_p.h"
#include "qpieslice.h"
#include "qpiesliceprivate_p.h"
#include "qpieseries.h"
#include "chartpresenter_p.h"
#include "chartdataset_p.h"
#include "chartanimator_p.h"
#include <QDebug>
#include <QPainter>
#include <QTimer>
QTCOMMERCIALCHART_BEGIN_NAMESPACE
PieChartItem::PieChartItem(QPieSeries *series, ChartPresenter* presenter)
:ChartItem(presenter),
m_series(series)
{
Q_ASSERT(series);
connect(series, SIGNAL(added(QList<QPieSlice*>)), this, SLOT(handleSlicesAdded(QList<QPieSlice*>)));
connect(series, SIGNAL(removed(QList<QPieSlice*>)), this, SLOT(handleSlicesRemoved(QList<QPieSlice*>)));
connect(series, SIGNAL(piePositionChanged()), this, SLOT(handlePieLayoutChanged()));
connect(series, SIGNAL(pieSizeChanged()), this, SLOT(handlePieLayoutChanged()));
QTimer::singleShot(0, this, SLOT(initialize()));
// Note: the following does not affect as long as the item does not have anything to paint
setZValue(ChartPresenter::PieSeriesZValue);
}
PieChartItem::~PieChartItem()
{
// slices deleted automatically through QGraphicsItem
}
void PieChartItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *)
{
Q_UNUSED(painter)
// TODO: paint shadows for all components
// - get paths from items & merge & offset and draw with shadow color?
//painter->setBrush(QBrush(Qt::red));
//painter->drawRect(m_debugRect);
}
void PieChartItem::initialize()
{
handleSlicesAdded(m_series->slices());
}
void PieChartItem::handleSlicesAdded(QList<QPieSlice*> slices)
{
bool isEmpty = m_slices.isEmpty();
presenter()->theme()->decorate(m_series, presenter()->dataSet()->seriesIndex(m_series), false);
foreach (QPieSlice *s, slices) {
PieSliceItem* item = new PieSliceItem(this);
m_slices.insert(s, item);
connect(s, SIGNAL(changed()), this, SLOT(handleSliceChanged()));
connect(item, SIGNAL(clicked(Qt::MouseButtons)), s, SIGNAL(clicked(Qt::MouseButtons)));
connect(item, SIGNAL(hoverEnter()), s, SIGNAL(hoverEnter()));
connect(item, SIGNAL(hoverLeave()), s, SIGNAL(hoverLeave()));
PieSliceData data = sliceData(s);
if (animator())
animator()->addAnimation(this, s, data, isEmpty);
else
setLayout(s, data);
}
}
void PieChartItem::handleSlicesRemoved(QList<QPieSlice*> slices)
{
presenter()->theme()->decorate(m_series, presenter()->dataSet()->seriesIndex(m_series), false);
foreach (QPieSlice *s, slices) {
if (animator())
animator()->removeAnimation(this, s);
else
destroySlice(s);
}
}
void PieChartItem::handlePieLayoutChanged()
{
PieLayout layout = calculateLayout();
applyLayout(layout);
update();
}
void PieChartItem::handleSliceChanged()
{
QPieSlice* slice = qobject_cast<QPieSlice *>(sender());
Q_ASSERT(m_slices.contains(slice));
PieSliceData data = sliceData(slice);
updateLayout(slice, data);
update();
}
void PieChartItem::handleDomainChanged(qreal, qreal, qreal, qreal)
{
// TODO
}
void PieChartItem::handleGeometryChanged(const QRectF& rect)
{
prepareGeometryChange();
m_rect = rect;
handlePieLayoutChanged();
}
void PieChartItem::calculatePieLayout()
{
// find pie center coordinates
m_pieCenter.setX(m_rect.left() + (m_rect.width() * m_series->pieHorizontalPosition()));
m_pieCenter.setY(m_rect.top() + (m_rect.height() * m_series->pieVerticalPosition()));
// find maximum radius for pie
m_pieRadius = m_rect.height() / 2;
if (m_rect.width() < m_rect.height())
m_pieRadius = m_rect.width() / 2;
// apply size factor
m_pieRadius *= m_series->pieSize();
}
PieSliceData PieChartItem::sliceData(QPieSlice *slice)
{
PieSliceData sliceData = slice->data_ptr()->m_data;
sliceData.m_center = PieSliceItem::sliceCenter(m_pieCenter, m_pieRadius, slice);
sliceData.m_radius = m_pieRadius;
return sliceData;
}
PieLayout PieChartItem::calculateLayout()
{
calculatePieLayout();
PieLayout layout;
foreach (QPieSlice* s, m_series->slices()) {
if (m_slices.contains(s)) // calculate layout only for those slices that are already visible
layout.insert(s, sliceData(s));
}
return layout;
}
void PieChartItem::applyLayout(const PieLayout &layout)
{
if (animator())
animator()->updateLayout(this, layout);
else
setLayout(layout);
}
void PieChartItem::updateLayout(QPieSlice *slice, const PieSliceData &sliceData)
{
if (animator())
animator()->updateLayout(this, slice, sliceData);
else
setLayout(slice, sliceData);
}
void PieChartItem::setLayout(const PieLayout &layout)
{
foreach (QPieSlice *slice, layout.keys()) {
PieSliceItem *item = m_slices.value(slice);
Q_ASSERT(item);
item->setSliceData(layout.value(slice));
item->updateGeometry();
item->update();
}
}
void PieChartItem::setLayout(QPieSlice *slice, const PieSliceData &sliceData)
{
// find slice
PieSliceItem *item = m_slices.value(slice);
Q_ASSERT(item);
item->setSliceData(sliceData);
item->updateGeometry();
item->update();
}
void PieChartItem::destroySlice(QPieSlice *slice)
{
delete m_slices.take(slice);
}
#include "moc_piechartitem_p.cpp"
QTCOMMERCIALCHART_END_NAMESPACE