logger.h

QT4的utils库源码包.解压后运行./configure配置,然后make.使用时在.pro文件中加入两行:LIBS+=-L$$(CPPLIBS)-lutils及INCLUDEPATH+=$$(C

#ifndef LOGGER_H
#define LOGGER_H

#include "myexport.h"
#include <QObject>
#include <QMap>
#include <QString>

/** @short A simple object for communicating log messages 
  between objects/threads.
    
  Inspired by the Logger class of the JDK 1.5, 
  (which was inspired by Apache log4j).
  
  Loggers have a signal data(QString) which can be connected to 
  slots of other Qt objects - especially the
  @ref LogWindow class, which is designed for it.
  @author Alan Ezust
  @see Command
*/

class UTILS_EXPORT Logger : public QObject {
    Q_OBJECT

    public:

    /**
       Factory named-singleton manager.
       Creates or returns an existing Logger object
       whose name is logname. if logname is "debug", installs a
       QDebugHandler so that qDebug() messages go through this
       log also.
     */
    static Logger* getLogger(QString logname = QString());

    static void myDebugHandler( QtMsgType type, const char *msg );

    public slots:
    
    /** Send some info to this log */
    void info(QString str);

    signals:
    /** Emitted whenever anyone writes anything to this log */
    void data(const QString &str);

    protected:
    /**
    You don't create them directly. Use Logger::getLogger(logname)
    */
    Logger(QString logname) {
        setObjectName(logname);
    }
    
    private:
    static QMap<QString, Logger*> sm_LogMap;
//    static Logger* sm_Debug;
};

#endif        //  #ifndef LOGGER_H