基于Qt设计的的多人网络聊天室

#include "dialog.h" #include "ui_dialog.h" Dialog::Dialog(QWidget *parent) : QDialog(parent), ui(new Ui::Dialog) { ui->setupUi(this); //抢占上层 setWindowFlags(Qt::WindowStaysOnTopHint); //创建子窗口对象 mydialog=new MyDialog(this); colorDialod =new QColorDialog(this); //创建按钮组管理按钮 group =new QButtonGroup(this); group->addButton(ui->pushButtonConnect,1); group->addButton(ui->pushButtonSetName,2); group->addButton(ui->pushButtonChangeName,3); group->addButton(ui->pushButtonSendMsg,4); group->addButton(ui->pushButtonHistory,5); group->addButton(ui->pushButtonClear,6); group->addButton(ui->pushButtonDeleteHistory,7); group->addButton(ui->pushButtonExit,8); group->addButton(ui->pushButtonDefault,9); group->addButton(ui->pushButtonOnlineNum,10); group->addButton(ui->pushButtonFontColor,11); group->addButton(ui->pushButtonCloseHistory,12); connect(group,SIGNAL(buttonClicked(int)),this,SLOT(btnsClickedSlot(int))); //创建TCP通信对象 client =new QTcpSocket(this); connect(client,SIGNAL(disconnected()),this,SLOT(disconnectedSlot())); connect(client,SIGNAL(readyRead()),this,SLOT(readyReadSlot())); //创建数据库及表 connectDBAndCreatTable(); //捕获输入框内的回车事件，防止触发窗口其他按钮 ui->lineEditIP->setFocus(); ui->lineEditIP->installEventFilter(this); ui->lineEditName->setFocus(); ui->lineEditName->installEventFilter(this); ui->textEdit->setFocus(); //连接回车键对键入信息栏使能信号槽 connect(ui->radioButton,SIGNAL(toggled(bool)),this,SLOT(rdbtnToggledSlot(bool))); //连接字体选择信号槽 connect(ui->fontComboBox,SIGNAL(currentTextChanged(QString)),this,SLOT(fontBoxTextChangedSlot(QString))); //连接背景选择信号槽 connect(ui->comboBoxGroundColor,SIGNAL(currentIndexChanged(QString)),this,SLOT(currentIndexChangedSlot(QString))); //连接字号选择信号槽 connect(ui->comboBoxFontSize,SIGNAL(currentIndexChanged(QString)),this,SLOT(fontSizeChangedSlot(QString))); //连接颜色对话框选择颜色信号槽 connect(colorDialod,SIGNAL(colorSelected(QColor)),this,SLOT(colorSelectedSlot(QColor))); } Dialog::~Dialog() { if(client->isOpen()) client->close(); delete ui; } //获取IP连接服务器 void Dialog::btnConnectClicked() { QString ip=ui->lineEditIP->text(); int port=6226; client->connectToHost(ip,port); } //设置网名，修改需点击修改按钮重新设置 void Dialog::btnSetNameClicked() { name =ui->lineEditName->text(); if(name=="") { QMessageBox::warning(this,"提示","请设置您的网名"); return; } ui->pushButtonSetName->setEnabled(false); ui->pushButtonChangeName->setEnabled(true); } //修改网名 void Dialog::btnChangeNameClicked() { ui->pushButtonChangeName->setEnabled(false); ui->pushButtonSetName->setEnabled(true); } //向服务器发送信息，将发送的信息显示到信息显示对话框 //信息保存本地数据库 void Dialog::btnSendMsgClicked() { QString msg=ui->textEdit->toPlainText(); ui->textEdit->clear(); if(name=="") { QMessageBox::warning(this,"提示","请输入您的网名"); return; } if(msg=="") { QMessageBox::warning(this,"提示","请输入信息内容"); return; } if(msg.size()>1024) { QMessageBox::warning(this,"提示","信息字数过多，请重新发送"); return; } QString time=QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss"); QString text=name+QString(":")+msg; ui->textBrowser->append(time); ui->textBrowser->append(text); //向服务器发送消息内容 QTextStream output(client); output<<text; //信息保存数据库 text.prepend("(我)"); insertDataToTable(time,text); } //新建窗口显示历史记录 void Dialog::btnHistoryClicked() { ui->pushButtonHistory->setEnabled(false); ui->pushButtonCloseHistory->setEnabled(true); mydialog->changePosition(this->x()+this->width(),this->y(),ui->textBrowser->width(),this->height()); mydialog->show(); mydialog->selectAllHistory(); } //清空消息对话框 void Dialog::btnClearClicked() { ui->textBrowser->clear(); } //清空历史记录表 void Dialog::btnDeleteHisClicked() { QString sql="DELETE FROM history"; QSqlQuery sq; if(sq.exec(sql)) { qDebug()<<"删除成功"; }else { qDebug()<<"失败"; } //判断历史记录子窗口是否显示可见 if(mydialog->isVisible()) { mydialog->close(); btnHistoryClicked(); } } //退出聊天室 void Dialog::btnExitClicked() { client->disconnectFromHost(); } //恢复对话框默认设置 void Dialog::btnDefaultClicked() { ui->fontComboBox->setCurrentText("宋体"); ui->comboBoxFontSize->setCurrentText("默认"); ui->comboBoxGroundColor->setCurrentIndex(0); QColor color(0,0,0); colorSelectedSlot(color); } //获取在线人数 void Dialog::btnOnlineClicked() { QString text="Online users"; QTextStream output(client); output<<text; } //更改对话框文字颜色按钮按下，显示颜色对话框 void Dialog::btnFontColorClicked() { colorDialod->open(); } //关闭历史记录窗口 void Dialog::btnCloseHisClicked() { mydialog->close(); ui->pushButtonCloseHistory->setEnabled(false); ui->pushButtonHistory->setEnabled(true); } //连接数据库并创历史记录表 void Dialog::connectDBAndCreatTable() { QSqlDatabase db=QSqlDatabase::addDatabase("QSQLITE"); db.setDatabaseName("history.db"); if(db.open()) { qDebug()<<"数据库连接成功"; QString sql="CREATE TABLE history(time CHAR,msg CHAR);"; QSqlQuery sq; if(sq.exec(sql)) { qDebug()<<"创表ok"; }else { qDebug()<<sq.lastError().text().prepend("创表失败："); } }else { QString text =db.lastError().text(); QMessageBox::critical(this,"错误",text.prepend("数据库连接失败！")); } } //数据库表中插入数据 void Dialog::insertDataToTable(const QString &time, const QString &msg) { QString sql="INSERT INTO history VALUES(?,?)"; QSqlQuery sq; sq.prepare(sql); sq.addBindValue(time); sq.addBindValue(msg); if(sq.exec()) { qDebug()<<"添加成功"; }else { qDebug()<<"失败"; } } //按钮组点击槽函数 void Dialog::btnsClickedSlot(int id) { if(id==1) { btnConnectClicked(); }else if(id ==2) { btnSetNameClicked(); }else if(id ==3) { btnChangeNameClicked(); }else if(id ==4) { btnSendMsgClicked(); }else if(id==5) { btnHistoryClicked(); }else if(id==6) { btnClearClicked(); }else if(id==7) { btnDeleteHisClicked(); }else if(id==8) { btnExitClicked(); }else if(id==9) { btnDefaultClicked(); }else if(id==10) { btnOnlineClicked(); }else if(id==11) { btnFontColorClicked(); }else if(id==12) { btnCloseHisClicked(); } } //聊天室断开连接信号对应的槽函数 void Dialog::disconnectedSlot() { QMessageBox::information(this,"提示","已从聊天室断开连接"); btnCloseHisClicked(); ui->textBrowser->clear(); ui->textEdit->clear(); ui->lineEditName->clear(); btnDefaultClicked(); ui->pushButtonConnect->setEnabled(true); ui->pushButtonSetName->setEnabled(false)