Qt实现Kermit协议(五)

3 实现

3.4 KermitFileSender

该模块实现了Kermit异步发送文件功能。

3.4.1 KermitFileSender定义

class QSerialPort;
class KermitSendFile;
class KermitFileSender : public QObject
{Q_OBJECT
public:explicit KermitFileSender(QSerialPort *serial, QObject *parent = nullptr);~KermitFileSender();signals:void start_send(QString const& fileName);void cancel_send();void gotFileSize(quint64 filesize);void progressInfo(quint32 blockNumber, quint64 bytesOfSend);void finished();void error(QString const& e);
public:void start(QString const& fileName);void stop();void cancel();
private:QThread workerThread;KermitSendFile* worker_;
};

公共接口：

start 开始发送文件
stop 停止传输文件
cancel 中断传输文件

信号：

gotFileSize 文件大小信号
progressInfo 传输进度信号
error 出错信号
finished 传输结束信号
start_send 开始发送文件信号
cancel_send 中断传输文件信号

3.4.2 KermitFileSender实现

3.4.2.1 构造函数/析构函数

KermitFileSender::KermitFileSender(QSerialPort *serial, QObject *parent): QObject(parent)
{KermitSendFile* worker = new KermitSendFile(serial);serial->moveToThread(&workerThread);worker->moveToThread(&workerThread);connect(&workerThread, &QThread::finished, worker, &QObject::deleteLater);connect(this, &KermitFileSender::start_send, worker, &KermitSendFile::start);connect(this, &KermitFileSender::cancel_send, worker, &KermitSendFile::cancel);connect(worker, &KermitSendFile::gotFileSize, this, &KermitFileSender::gotFileSize);connect(worker, &KermitSendFile::progressInfo, this, &KermitFileSender::progressInfo);connect(worker, &KermitSendFile::finished, this, &KermitFileSender::finished);connect(worker, &KermitSendFile::error, this, &KermitFileSender::error);worker_ = worker;workerThread.start();
}KermitFileSender::~KermitFileSender()
{workerThread.quit();workerThread.wait();
}

函数说明:

构造函数
- 将serial和worker移动到workerThread线程
- 连接信号和槽函数
- 启动线程
析构函数
- 退出线程
- 等待线程退出

3.4.2.2 start/stop/cancel

KermitFileSender::~KermitFileSender()
{workerThread.quit();workerThread.wait();
}void KermitFileSender::start(QString const& fileName)
{emit start_send(fileName);
}void KermitFileSender::stop()
{worker_->stop();
}void KermitFileSender::cancel()
{emit cancel_send();
}