editor/light.cpp

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

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

}

QRectF Light::boundingRect() const
{
    return QRectF(0, 0, 50, 50);
}

void Light::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_ == "指示灯") {
            painter->drawEllipse(0,0,50,50);
        }
        if (!registerId_.isEmpty()) {
            painter->save();
            painter->setFont(QFont("Arial", 8));
            painter->setPen(Qt::black);
            QString text = QString("%1").arg(registerId());
            painter->drawText(QRectF(13, 13, 26, 26), Qt::AlignCenter, 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 Light::state() const
{
    return registerValue_ > 0;
}