Simple-logger: Difference between revisions
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Example of using | Example of using | ||
<code> | <code> | ||
QPlainTextEdit *editor = new QPlainTextEdit(this); | |||
QString fileName = "c:.txt"; | |||
Logger *logger = new Logger(this, fileName, editor); | |||
logger.write("Hello Qt"); | |||
</code> | |||
Logger.h | Logger.h | ||
<code> | |||
#ifndef LOGGER_H | |||
#define LOGGER_H | |||
#include | #include <QObject> | ||
#include <QPlainTextEdit> | |||
#include <QFile> | |||
#include <QTextStream> | |||
#include <QDateTime> | |||
class Logger : public QObject | class Logger : public QObject | ||
{ | |||
Q_OBJECT | |||
public: | |||
explicit Logger(QObject *parent, QString fileName, QPlainTextEdit *editor = 0); | |||
~Logger(); | |||
void setShowDateTime(bool value); | |||
private: | private: | ||
QFile *file; | |||
QPlainTextEdit *m_editor; | |||
bool m_showDate; | |||
signals: | signals: | ||
public slots: | public slots: | ||
void write(const QString &value); | |||
}; | }; | ||
#endif // LOGGER_H | #endif // LOGGER_H | ||
</code> | |||
Logger.cpp | Logger.cpp | ||
<code> | |||
#include "Logger.h" | |||
Logger::Logger(QObject *parent, QString fileName, | Logger::Logger(QObject *parent, QString fileName, | ||
QPlainTextEdit *editor) : QObject(parent) { | |||
m_editor = editor; | 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) { | 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) { | void Logger::setShowDateTime(bool value) { | ||
m_showDate = value; | |||
} | |||
Logger::~Logger() { | Logger::~Logger() { | ||
if (file != 0) | |||
file->close(); | |||
} | |||
</code> |
Revision as of 10:04, 25 February 2015
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 &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();
}