HxUtils/HxBroadcast.cpp

#include "HxBroadcast.h"

#include <QHostAddress>

HxBroadcast *broadcast = nullptr;

HxBroadcast* HxBroadcast::context() { return broadcast; }

void HxBroadcast::initialization(int port)
{
    broadcast = new HxBroadcast();

    broadcast->port = port;
    broadcast->socket = new QUdpSocket();
    connect(broadcast->socket, &QUdpSocket::readyRead, broadcast, &HxBroadcast::receive_ready_read);
    connect(broadcast, &HxBroadcast::publish_event, broadcast, &HxBroadcast::publish_achieve);
}

void HxBroadcast::publish(QString message)
{
    emit broadcast->publish_event(message);
}

void HxBroadcast::publish_achieve(QString message)
{
    socket->writeDatagram(message.toUtf8(), QHostAddress::Broadcast, broadcast->port);
}

void HxBroadcast::receive_ready_read()
{
    /* 拥有等待的数据报 */
    while (socket->hasPendingDatagrams())
    {
        QByteArray datagram;

        /* 让datagram的大小为等待处理的数据报的大小，这样才能接收到完整的数据 */
        datagram.resize(socket->pendingDatagramSize());

        /* 接收数据报，将其存放到datagram中*/
        socket->readDatagram(datagram.data(), datagram.size());

        emit broadcast->receive_event(QString::fromLocal8Bit(datagram));
    }
}