Qt数据库应用之实现通用数据库采集

#include "frmdbdownload.h"
#include "ui_frmdbdownload.h"
#include "quihelper.h"
#include "dbconnthread.h"

frmDbDownload::frmDbDownload(QWidget *parent) : QWidget(parent), ui(new Ui::frmDbDownload)
{
    ui->setupUi(this);
    this->initForm();
    this->initConfig();
    this->initTable();
}

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

void frmDbDownload::initForm()
{
    ui->frame->setFixedWidth(AppConfig::RightWidth);
    QUIHelper::initTableView(ui->tableWidget);

    maxCount = 100;
    currentCount = 0;
    columnCount = 0;

    timer = new QTimer(this);
    timer->setInterval(1000);
    connect(timer, SIGNAL(timeout()), this, SLOT(on_btnDo_clicked()));

    //实例化数据库通信类
    dbConn = new DbConnThread(this);
    dbConn->setDbFlag("云端");
    connect(dbConn, SIGNAL(debug(QString)), this, SLOT(debug(QString)));
    connect(dbConn, SIGNAL(error(QString)), this, SLOT(error(QString)));
    connect(dbConn, SIGNAL(receiveData(QString, QStringList, int)), this, SLOT(receiveData(QString, QStringList, int)));
}

void frmDbDownload::initConfig()
{
    ui->cboxDbType->addItems(DbHelper::getDbType());
    ui->cboxDbType->setCurrentIndex(ui->cboxDbType->findText(AppConfig::DbType6));
    connect(ui->cboxDbType, SIGNAL(currentIndexChanged(int)), this, SLOT(saveConfig()));

    ui->txtDbName->setText(AppConfig::DbName6);
    connect(ui->txtDbName, SIGNAL(textChanged(QString)), this, SLOT(saveConfig()));

    ui->txtHostName->setText(AppConfig::HostName6);
    connect(ui->txtHostName, SIGNAL(textChanged(QString)), this, SLOT(saveConfig()));

    ui->txtHostPort->setText(QString::number(AppConfig::HostPort6));
    connect(ui->txtHostPort, SIGNAL(textChanged(QString)), this, SLOT(saveConfig()));

    ui->txtUserName->setText(AppConfig::UserName6);
    connect(ui->txtUserName, SIGNAL(textChanged(QString)), this, SLOT(saveConfig()));

    ui->txtUserPwd->setText(AppConfig::UserPwd6);
    connect(ui->txtUserPwd, SIGNAL(textChanged(QString)), this, SLOT(saveConfig()));
}

void frmDbDownload::saveConfig()
{
    AppConfig::DbType6 = ui->cboxDbType->currentText();
    AppConfig::DbName6 = ui->txtDbName->text();
    AppConfig::HostName6 = ui->txtHostName->text();
    AppConfig::HostPort6 = ui->txtHostPort->text().toInt();
    AppConfig::UserName6 = ui->txtUserName->text();
    AppConfig::UserPwd6 = ui->txtUserPwd->text();
    AppConfig::writeConfig();
}

void frmDbDownload::initTable()
{
    QStringList columnNames;
    columnNames << "位号" << "当前值" << "状态" << "时间";
    QList<int> columnWidths;
    columnWidths << 160 << 100 << 100 << 220;

    columnCount = columnNames.count();
    ui->tableWidget->setColumnCount(columnCount);
    ui->tableWidget->setHorizontalHeaderLabels(columnNames);
    for (int i = 0; i < columnCount; i++) {
        ui->tableWidget->setColumnWidth(i, columnWidths.at(i));
    }
}

void frmDbDownload::debug(const QString &msg)
{
    QUIHelper::appendMsg(ui->txtMain, 0, msg, maxCount, currentCount);
}

void frmDbDownload::error(const QString &msg)
{
    QUIHelper::appendMsg(ui->txtMain, 1, msg, maxCount, currentCount);
}

void frmDbDownload::receiveData(const QString &tag, const QStringList &data, int msec)
{
    QString msg = QString("用时( %1 秒)  标识( %2 )  数据( %3 )").arg(QString::number((double)msec / 1000, 'f', 3)).arg(tag).arg(data.join("|"));
    QUIHelper::appendMsg(ui->txtMain, 3, msg, maxCount, currentCount);

    //显示到表格中
    int count = data.count();
    ui->tableWidget->setRowCount(count / columnCount);
    int row = -1;
    for (int i = 0; i < count; i = i + columnCount) {
        row++;
        for (int j = 0; j < columnCount; ++j) {
            ui->tableWidget->setItem(row, j, new QTableWidgetItem(data.at(i + j)));
        }
    }
}

void frmDbDownload::on_btnOpen_clicked()
{
    if (ui->btnOpen->text() == "打开数据库") {
        DbInfo dbInfo;
        dbInfo.connName = this->objectName();
        dbInfo.dbName = AppConfig::DbName6;
        dbInfo.hostName = AppConfig::HostName6;
        dbInfo.hostPort = AppConfig::HostPort6;
        dbInfo.userName = AppConfig::UserName6;
        dbInfo.userPwd = AppConfig::UserPwd6;

        QString dbType = AppConfig::DbType6.toUpper();
        if (dbType == "SQLITE") {
            dbInfo.dbName = DbHelper::getDbDefaultFile();
        }

        dbConn->setConnInfo(DbHelper::getDbType(dbType), dbInfo);
        if (dbConn->openDb()) {
            dbConn->start();
            ui->btnOpen->setText("关闭数据库");
        } else {
            QString error = dbConn->getDatabase().lastError().text();
            QUIHelper::showMessageBoxError("打开数据库失败!\n" + error, 3);
        }
    } else {
        dbConn->stop();
        dbConn->closeDb();
        ui->btnOpen->setText("打开数据库");
        on_btnClear_clicked();
    }

    QTimer::singleShot(1000, this, SLOT(on_btnStart_clicked()));
}

void frmDbDownload::on_btnCopy_clicked()
{
    //将数据库设置参数一键粘贴过来
    ui->cboxDbType->setCurrentIndex(ui->cboxDbType->findText(AppConfig::LocalDbType));
    ui->txtDbName->setText(AppConfig::LocalDbName);
    ui->txtHostName->setText(AppConfig::LocalHostName);
    ui->txtHostPort->setText(QString::number(AppConfig::LocalHostPort));
    ui->txtUserName->setText(AppConfig::LocalUserName);
    ui->txtUserPwd->setText(AppConfig::LocalUserPwd);
}

void frmDbDownload::on_btnDo_clicked()
{
    if (!dbConn->getOk()) {
        return;
    }

    dbConn->select("NodeData", "PositionID,NodeValue,NodeStatus,SaveTime");
}

void frmDbDownload::on_btnStart_clicked()
{
    if (ui->btnStart->text() == "启动服务") {
        on_btnDo_clicked();
        timer->start();
        ui->btnStart->setText("停止服务");
    } else {
        timer->stop();
        ui->btnStart->setText("启动服务");
    }
}

void frmDbDownload::on_btnClear_clicked()
{
    QUIHelper::appendMsg(ui->txtMain, 0, "", maxCount, currentCount);
}