使用绘制事件完成钟表的绘制

头文件

#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>
#include<QTcpSocket>
#include<QMessageBox>

QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACE

class Widget : public QWidget
{
    Q_OBJECT

public:
    Widget(QWidget *parent = nullptr);
    ~Widget();

private slots:
    void on_connectBtn_clicked();

    void connected_slot();

    void readyRead_slot();

    void on_sendBtn_clicked();

    void on_disConnectBtn_clicked();

    void disconnected_slot();

private:
    Ui::Widget *ui;

    QTcpSocket *client;

    QString userName;
};
#endif // WIDGET_H

源文件

#include "widget.h"
#include "ui_widget.h"

Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);

    //实例化客户端对象
    client = new QTcpSocket(this);

    connect(client,&QTcpSocket::connected,this,&Widget::connected_slot);

    connect(client,&QTcpSocket::readyRead,this,&Widget::readyRead_slot);

    connect(client,&QTcpSocket::disconnected,this,&Widget::disconnected_slot);
}

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


void Widget::on_connectBtn_clicked()
{
    //获取ui界面上的数据
    QString ip = ui->ipEdit->text();
    quint16 port = ui->portEdit->text().toUInt();
    userName = ui->nameEdit->text();

    //调用套接字成员函数，连接服务器
    client->connectToHost(ip,port);


}

void Widget::connected_slot()
{
    QMessageBox::information(this,"成功","连接成功");

    ui->ipEdit->setEnabled(false);
    ui->nameEdit->setEnabled(false);
    ui->portEdit->setEnabled(false);
    ui->connectBtn->setEnabled(false);

    QString msg = userName + ":Ciallo～(∠·ω<)⌒☆";
    client->write(msg.toLocal8Bit());
}

void Widget::readyRead_slot()
{
    //从套接字中读取数据
    QByteArray msg = client->readAll();

    //将读取下来的数据展示到ui界面上
    ui->msglistWidget->addItem(QString::fromLocal8Bit(msg));
}

//消息发送
void Widget::on_sendBtn_clicked()
{
    //组织要发送的消息
    QString msg = userName + ":" + ui->msgEdit->text();

    //将消息发送给服务器
    client->write(msg.toLocal8Bit());

    //将消息展示到自己的界面上
    QListWidgetItem *item = new QListWidgetItem(msg);
    item->setTextAlignment(Qt::AlignRight);

    ui->msglistWidget->addItem(item);

    //清空消息发送框的内容
    ui->msgEdit->clear();
}

//断开连接
void Widget::on_disConnectBtn_clicked()
{
    QString msg = userName + ":离开聊天室";
    client->write(msg.toLocal8Bit());

    //断开连接
    client->disconnectFromHost();


}

void Widget::disconnected_slot()
{
    QMessageBox::information(this,"提示","成功断开连接");

    ui->ipEdit->setEnabled(true);
    ui->nameEdit->setEnabled(true);
    ui->portEdit->setEnabled(true);
    ui->connectBtn->setEnabled(true);
}