Qt数据库应用之实现通用数据库请求

#include "frmdbhttp.h"
#include "ui_frmdbhttp.h"
#include "quihelper.h"
#include "dbhelper.h"
#include "dbhttpthread.h"

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

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

void frmDbHttp::showEvent(QShowEvent *)
{
    static bool isShow = false;
    if (!isShow) {
        isShow = true;
        QTimer::singleShot(100, this, SLOT(on_btnStart_clicked()));
    }
}

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

    maxCount = 100;
    currentCount = 0;

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

    //实例化网络请求采集数据通信类
    dbHttp = new DbHttpThread(this);
    connect(dbHttp, SIGNAL(debug(QString)), this, SLOT(debug(QString)));
    connect(dbHttp, SIGNAL(error(QString)), this, SLOT(error(QString)));
    connect(dbHttp, SIGNAL(receiveData(QString, QStringList, int)), this, SLOT(receiveData(QString, QStringList, int)));

    //设置参数
    dbHttp->setUrl("http://127.0.0.1:6000");
    QMap<QString, QString> tables;
    tables.insert("NodeData", "PositionID,NodeValue,NodeStatus,SaveTime");
    dbHttp->setTables(tables);
}

void frmDbHttp::initConfig()
{

}

void frmDbHttp::saveConfig()
{

}

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

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

void frmDbHttp::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 frmDbHttp::on_btnDo_clicked()
{
    dbHttp->select("NodeData", "PositionID,NodeValue,NodeStatus,SaveTime");
}

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