#include <QPainter>
#include "graphicsItem/itemExtend.h"

ItemExtend::ItemExtend(QGraphicsItem *parent)
    : HandleRect(parent)
{
    setAcceptHoverEvents(true);
    setFlag(QGraphicsItem::ItemIsSelectable, true);
    setFlag(QGraphicsItem::ItemIsFocusable, true);
    m_penWidth = 2;
    m_normalColor = QColor(52, 152, 219);  // 蓝色
    m_hoverColor = QColor(41, 128, 185);    // 深蓝
    m_currentColor = m_normalColor;
}

ItemExtend::~ItemExtend()
{
}

void ItemExtend::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
{
    painter->save();
    painter->setRenderHint(QPainter::Antialiasing, true);

    // 绘制圆形背景
    QBrush bgBrush(m_currentColor);
    painter->setBrush(bgBrush);
    painter->setPen(Qt::NoPen);
    painter->drawEllipse(boundingRect());

    // 绘制白色"+"号
    QPen pen(Qt::white, m_penWidth);
    pen.setCapStyle(Qt::RoundCap);
    pen.setJoinStyle(Qt::MiterJoin);
    painter->setPen(pen);

    QRectF rect = boundingRect().adjusted(4, 4, -4, -4);
    qreal centerX = rect.center().x();
    qreal centerY = rect.center().y();
    qreal lineLength = rect.width() * 0.4;

    // 横线
    painter->drawLine(QLineF(centerX - lineLength/2, centerY,
                             centerX + lineLength/2, centerY));
    // 竖线
    painter->drawLine(QLineF(centerX, centerY - lineLength/2,
                             centerX, centerY + lineLength/2));

    painter->restore();
}