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

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

}

QRectF Comparator::boundingRect() const
{
    return QRectF(-22, -20, 44, 40);
}

void Comparator::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *)
{
    painter->setRenderHint(QPainter::Antialiasing);
    if (type_ == "比较") {
        painter->drawRect(QRectF(-12, -8, 24, 16));
        painter->setFont(QFont("Arial", 8));
        painter->drawText(QRectF(-10, -8, 20, 16), Qt::AlignCenter, "CP");

        // 锚点
        painter->setBrush(Qt::darkGray);
        painter->setPen(Qt::NoPen);
        painter->drawEllipse(QPointF(-18, 0), 4, 4);
        painter->drawEllipse(QPointF(18, 0), 4, 4);
    }
        painter->save();
        painter->setFont(QFont("Arial", 8));
        painter->setPen(Qt::black);
        if (!registerId_.isEmpty()) {
            QString text = QString("%1: %2").arg(registerId_).arg(registerValue_);
            painter->drawText(QRectF(-20, -25, 40, 20), Qt::AlignCenter, text);
        }

        // 在右上角显示第二个寄存器
        if (!registerId2_.isEmpty()) {
            QString text = QString("%1: %2").arg(registerId2_).arg(registerValue2_);
            painter->drawText(QRectF(-20, 5, 40, 20), 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());
    }
}

void Comparator::setRegisterId(const QString &id)
{
    if (registerId_.isEmpty())
    {
        registerId_ = id;
    }
    else if(registerId2_.isEmpty())
    {
        registerId2_ = id;
    }
}

void Comparator::setRegisterValue(const QString &registerId, quint16 value)
{
    if (registerId_ == registerId)
    {
        registerValue_ = value;
        update(); // 触发重绘
    }
    if (registerId2_ == registerId)
    {
        registerValue2_ = value;
        update(); // 触发重绘
    }
}