105 lines
2.7 KiB
C++
105 lines
2.7 KiB
C++
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#include "graphdialog.h"
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#include "ui_graphdialog.h"
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#include <QSqlQuery>
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#include <QSqlError>
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#include <QDateTime>
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#include <QDebug>
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#include <QLineSeries>
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#include <QDateTimeAxis>
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#include <QValueAxis>
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GraphDialog::GraphDialog(QSqlDatabase &database, QWidget *parent) :
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QDialog(parent),
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m_ui(std::make_unique<Ui::GraphDialog>()),
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m_database(database)
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{
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m_ui->setupUi(this);
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QString sql;
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if (m_database.driverName() == "QSQLITE")
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{
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sql = "SELECT "
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"`Timestamp`, "
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"COUNT(`Timestamp`) "
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"FROM "
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"`Logs` "
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"GROUP BY "
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"STRFTIME('%Y-%m-%d %H:00:00.000', `Timestamp`)";
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}
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else if (m_database.driverName() == "QMYSQL")
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{
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sql = "SELECT "
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"`Timestamp`, "
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"COUNT(`Timestamp`) "
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"FROM "
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"`Logs` "
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"GROUP BY "
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"DATE_FORMAT(`Timestamp`, '%Y-%m-%d %H:%i:00.000')";
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}
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else
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qFatal("unknown sql driver");
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QSqlQuery query(sql, m_database);
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if (query.lastError().isValid())
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qCritical() << query.lastError().text();
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auto chart = new QtCharts::QChart();
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chart->legend()->hide();
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chart->setTitle(tr("Charts-Test"));
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auto series = new QtCharts::QLineSeries();
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chart->addSeries(series);
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QDateTime minDt, maxDt;
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int maxCount{};
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while (query.next())
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{
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const auto timestampStr = query.value(0).toString();
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qDebug() << timestampStr;
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const auto timestamp = QDateTime::fromString(timestampStr, QStringLiteral("yyyy-MM-dd HH:mm:ss.zzz"));
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Q_ASSERT(timestamp.isValid());
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if (minDt.isNull() || timestamp < minDt)
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minDt = timestamp;
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if (maxDt.isNull() || timestamp > maxDt)
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maxDt = timestamp;
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const auto count = query.value(1).toInt();
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if (count > maxCount)
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maxCount = count;
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qDebug() << timestamp << count;
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series->append(timestamp.toMSecsSinceEpoch(), count);
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}
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qDebug() << minDt << maxDt;
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auto axisX = new QtCharts::QDateTimeAxis;
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axisX->setRange(minDt, maxDt);
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axisX->setTickCount(20);
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axisX->setFormat("HH:mm:ss");
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axisX->setTitleText("Timestamp");
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chart->addAxis(axisX, Qt::AlignBottom);
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series->attachAxis(axisX);
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auto axisY = new QtCharts::QValueAxis;
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axisY->setMax(maxCount);
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axisY->setLabelFormat("%i");
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axisY->setTitleText("Logs count");
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chart->addAxis(axisY, Qt::AlignLeft);
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series->attachAxis(axisY);
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m_ui->chartView->setRenderHint(QPainter::Antialiasing);
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m_ui->chartView->setChart(chart);
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}
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GraphDialog::~GraphDialog() = default;
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