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#include "PieLegend.h"
#include "PieChartScene.h"
PieLegend::PieLegend(const QPointF& pos, const PieChartScene* scene):
scene(scene)
{
setPos(pos);
addLabels();
}
QRectF PieLegend::boundingRect() const
{
return QRectF(-Width / 2, -Width / 2, Width, Width);
}
void PieLegend::addLabels()
{
for(int i = 0; i < scene->getDataSet().size(); i++)
addLabel(i, getLabelPos(i));
}
QPointF PieLegend::getLabelPos(int index) const
{
return boundingRect().topLeft() +
QPointF(SquareSide / 2, SquareSide / 2) +
index * QPointF(0, SquareSide + LabelSpacing);
}
void PieLegend::addLabel(int index, const QPointF& pos)
{
QRectF squareRect(-SquareSide / 2., -SquareSide / 2.,
SquareSide, SquareSide);
QGraphicsRectItem* squareItem = new QGraphicsRectItem(squareRect, this);
squareItem->setBrush(QColor(scene->getColors()[index]));
squareItem->setPos(pos);
QGraphicsSimpleTextItem* textItem =
new QGraphicsSimpleTextItem(scene->getDataSet()[index].label, this);
textItem->setPos(getTextPos(pos, textItem));
}
QPointF PieLegend::getTextPos(const QPointF& squarePos,
const QGraphicsSimpleTextItem* textItem) const
{
return squarePos +
QPointF(SquareSide / 2. + LabelTextSpacing,
-textItem->boundingRect().height() / 2);
}
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