图书馆自习室座位管理系统

#include "mainwindow.h" #include "ui_mainwindow.h" #include <QtNetwork> #include <QtWidgets/QApplication> #include <qdebug.h> MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) { setupUi(this); rowClicked = NULL; statusLabel->setText(tr("Click REFRESH")); BookButton->setDisabled(true); LeaveButton->setDisabled(true); tableWidget->verticalHeader()->hide(); tableWidget->setEditTriggers(QAbstractItemView::NoEditTriggers); tableWidget->setSelectionBehavior(QTableWidget::SelectRows);//一次选中一行 tableWidget->setSelectionMode(QAbstractItemView::SingleSelection);//只能单选 connect(RefreshButton,SIGNAL(clicked(bool)), this,SLOT(connectToServer())); connect(BookButton,SIGNAL(clicked(bool)), this,SLOT(connectToServer())); connect(LeaveButton,SIGNAL(clicked(bool)), this,SLOT(connectToServer())); connect(StopButton,SIGNAL(clicked(bool)), this,SLOT(connectionClosedByServer())); connect(RefreshButton,SIGNAL(clicked(bool)), this,SLOT(sendRefreshRequest())); connect(&tcpSocket,SIGNAL(readyRead()), this,SLOT(updateTableWidget())); connect(BookButton,SIGNAL(clicked(bool)), this,SLOT(sendBookRequest())); connect(LeaveButton,SIGNAL(clicked(bool)), this,SLOT(sendLeaveRequest())); connect(&tcpSocket,SIGNAL(error(QAbstractSocket::SocketError)), this,SLOT(error())); } void MainWindow::sendRefreshRequest() { tableWidget->setRowCount(0); tableWidget->clearContents(); QByteArray block; QDataStream out(&block, QIODevice::WriteOnly); out.setVersion(QDataStream::Qt_4_3); out<< quint16(0)<<quint8('R')<< comboBox->currentText(); out.device()->seek(0); out<<quint16(block.size() - sizeof(quint16)); tcpSocket.write(block); nextBlockSize = 0; rowClicked = NULL; statusLabel->setText(tr("Ready")); } void MainWindow::sendBookRequest() { checkNULL(); QByteArray block; QDataStream out(&block, QIODevice::WriteOnly); out.setVersion(QDataStream::Qt_4_3); out<< quint16(0)<<quint8('B')<<rowClassroom; out.device()->seek(0); out<<quint16(block.size() - sizeof(quint16)); tcpSocket.write(block); QString str = QString::number( --rowRemains); tableWidget->setItem(rowClicked,1,new QTableWidgetItem(str)); statusLabel->setText(tr("Don't forget to click LEAVE")); } void MainWindow::sendLeaveRequest() { checkNULL(); QByteArray block; QDataStream out(&block, QIODevice::WriteOnly); out.setVersion(QDataStream::Qt_4_3); out<< quint16(0)<<quint8('L')<<rowClassroom; out.device()->seek(0); out<<quint16(block.size() - sizeof(quint16)); tcpSocket.write(block); QString str = QString::number(++rowRemains ); tableWidget->setItem(rowClicked,1,new QTableWidgetItem(str)); statusLabel->setText(tr("Have a good day")); } void MainWindow::connectToServer() { tcpSocket.connectToHost(QHostAddress::LocalHost, 12345); nextBlockSize = 0; statusLabel->setText(tr("Connecting")); } void MainWindow::updateTableWidget() { QDataStream in(&tcpSocket); in.setVersion(QDataStream::Qt_4_3); forever{ int row = tableWidget->rowCount(); if(nextBlockSize == 0){ if(tcpSocket.bytesAvailable() < sizeof(quint16)){ qDebug()<<"bBreak"; qDebug()<<tcpSocket.bytesAvailable()<<","<<sizeof(quint16); break; } in >> nextBlockSize; } if (nextBlockSize == 0xFFFF) { qDebug()<<"0Break"; break; } if(tcpSocket.bytesAvailable() < nextBlockSize){ qDebug()<<"nBreak"; break; } QString classroom; QString remains; in >> classroom >>remains; tableWidget->setRowCount(row + 1); QStringList list; list << classroom << remains; for(int i = 0;i<list.count();++i) tableWidget->setItem(row,i,new QTableWidgetItem(list[i])); nextBlockSize = 0; } BookButton->setEnabled(true); LeaveButton->setEnabled(true); } void MainWindow::connectionClosedByServer() { closeConnection(); } void MainWindow::error() { statusLabel_2->setText(tcpSocket.errorString()); closeConnection(); } void MainWindow::checkNULL() { if (rowClicked == NULL) { rowClicked = 0; rowClassroom = tableWidget->item(0,0)->text().toInt(); rowRemains = tableWidget->item(0,1)->text().toInt(); } } void MainWindow::closeConnection() { tcpSocket.close(); } MainWindow::~MainWindow() { delete ui; } void MainWindow::on_tableWidget_cellClicked(int row, int column) { rowClassroom = tableWidget->item(row,0)->text().toInt(); rowRemains = tableWidget->item(row,1)->text().toInt(); rowClicked = row; }