editor/coil.cpp

#include "coil.h"
#include <QPainter>
#include <QStyleOptionGraphicsItem>

Coil::Coil(const QString &type) : Item(type)
{

}

void Coil::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *)
{
        painter->setRenderHint(QPainter::Antialiasing);

        if (state()) {
            painter->setBrush(Qt::green); // 激活状态
        } else {
            painter->setBrush(Qt::white); // 未激活状态
        }
        if (type_ == "线圈") {
            // 绘制线圈样式: 两边线段+中间椭圆
            painter->drawLine(-12, 0, -5, 0);
            painter->drawEllipse(QRectF(-5, -8, 10, 16));
            painter->drawLine(5, 0, 12, 0);

            // 画锚点
            painter->setBrush(Qt::darkGray);
            painter->setPen(Qt::NoPen);
            painter->drawEllipse(QPointF(-12, 0), 4, 4);   // 左锚点
            painter->drawEllipse(QPointF(12, 0), 4, 4);    // 右锚点
        }
        if (!registerId_.isEmpty()) {
            painter->save();
            painter->setFont(QFont("Arial", 8));
            painter->setPen(Qt::black);
            QString text = QString("%1: %2").arg(registerId()).arg(registerValue_);
            painter->drawText(boundingRect(), Qt::AlignBottom | Qt::AlignHCenter, text);
            painter->restore();
        }
        if (option->state & QStyle::State_Selected) {
            QPen pen(Qt::DashLine);
            pen.setColor(Qt::blue);
            pen.setWidth(2);
            painter->setPen(pen);
            painter->setBrush(Qt::NoBrush);
            painter->drawRect(boundingRect());
        }
}

bool Coil::state() const
{
    return registerValue_ > 0;
}