Simple-logger

h1. Simple Logger

This code shows as possibly of logging with recording to the file. Also if necessary it is possible show logging information in QPlainTextEdit

Example of using

QPlainTextEdit *editor = new QPlainTextEdit(this);
QString fileName = "c:.txt";
Logger *logger = new Logger(this, fileName, editor);
logger.write("Hello Qt");

Logger.h

#ifndef LOGGER_H
#define LOGGER_H

#include <QObject>
#include <QPlainTextEdit>
#include <QFile>
#include <QTextStream>
#include <QDateTime>

class Logger : public QObject
{
 Q_OBJECT
public:
 explicit Logger(QObject *parent, QString fileName, QPlainTextEdit *editor = 0);
 ~Logger();
 void setShowDateTime(bool value);

private:
 QFile *file;
 QPlainTextEdit *m_editor;
 bool m_showDate;

signals:

public slots:
 void write(const QString &amp;value);

};

#endif // LOGGER_H

Logger.cpp

#include "Logger.h"

Logger::Logger(QObject *parent, QString fileName,
 QPlainTextEdit *editor) : QObject(parent) {

m_editor = editor;
 m_showDate = true;
 if (!fileName.isEmpty()) {
 file = new QFile;
 file->setFileName(fileName);
 file->open(QIODevice::Append | QIODevice::Text);
 }
}

void Logger::write(const QString &value) {
 QString text = value;// + "";
 if (m_showDate)
 text = QDateTime::currentDateTime().toString("dd.MM.yyyy hh:mm:ss ") + text;
 QTextStream out(file);
 out.setCodec("UTF-8");
 if (file != 0) {
 out << text;
 }
 if (m_editor != 0)
 m_editor->appendPlainText(text);
}

void Logger::setShowDateTime(bool value) {
 m_showDate = value;
}

Logger::~Logger() {
 if (file != 0)
 file->close();
}