#include "widget.h"
#include "ui_widget.h"
#include <QMessageBox>

Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
    ui->setupUi(this);
    //1.socket对象
    tcpSocket = new QTcpSocket(this);

}

Widget::~Widget()
{
    delete ui;
}

void Widget::on_btnConnect_clicked()
{
    //2.打开连接
    tcpSocket->connectToHost(ui->editIpInput->text(),ui->editPortInput->text().toUInt());
    if(tcpSocket->waitForConnected(1000)){
        QMessageBox::information(this,"提示","连接成功");
    }else{
        QMessageBox::critical(this,"提示","连接失败");
    }
    //3.连接成功时连接函数
    //3.`connected()`这个信号在调用connectToHost()并成功建立连接之后发出。
    connect(tcpSocket,SIGNAL(connected()),this,SLOT(connected_Slot()));
}
//3.连接成功槽函数
void Widget::connected_Slot(){
    //4.新数据时，连接函数
    //`readyRead()`有新数据到来时触发
    connect(tcpSocket,SIGNAL(readyRead()),this,SLOT(readyRead_Slot()));
}
//4.新数据时槽函数
//发送数据到接收框
void Widget::readyRead_Slot(){
    QString buff;
    buff = tcpSocket->readAll();
    ui->pteMessageRCV->appendPlainText(buff);
}

//5.发送数据槽函数
void Widget::on_btnSend_clicked()
{
    //toLocal8Bit()转化为字符数组，data()转化为字符指针
    tcpSocket->write(ui->editMessageSend->text().toLocal8Bit().data());
}


//6.关闭连接槽函数
void Widget::on_btnClose_clicked()
{
    tcpSocket->close();
    //tcpSocket->disconnectFromHost();
    QMessageBox::information(this,"提示","断开连接");
}