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ExtensibleEllipseItem.cpp
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ExtensibleEllipseItem.cpp
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#include "ExtensibleEllipseItem.hpp"
ExtensibleEllipseItem::ExtensibleEllipseItem(QObject *parent) :
QObject(parent)
{
this->setFlag(QGraphicsItem::ItemIsSelectable);
}
void ExtensibleEllipseItem::wheelEvent(QGraphicsSceneWheelEvent *event)
{
if (isSelected() && event->delta() != 0)
{
QRectF cur = rect();
int sign = (event->delta() > 0) ? 1 : -1;
cur.setWidth(cur.width() + sign * 0.00005);
cur.setHeight(cur.height() + sign * 0.00005);
if (cur.width() >= 0.0001)
{
setRect(cur);
event->accept();
emit change();
}
else
{
event->ignore();
}
}
else
{
event->ignore();
}
}
void ExtensibleEllipseItem::paint(QPainter *painter,
const QStyleOptionGraphicsItem *option,
QWidget *widget)
{
Q_UNUSED(option)
Q_UNUSED(widget)
QColor color = isSelected() ? brush().color().lighter(125) : brush().color();
painter->setPen(color.darker());
painter->setBrush(QBrush(color));
painter->drawEllipse(rect());
}