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qeventloop.h

This is the verbatim text of the qeventloop.h include file. It is provided only for illustration; the copyright remains with Trolltech.

/****************************************************************************
** $Id: qt/qeventloop.h   3.3.8   edited Jan 11 14:38 $
**
** Declaration of TQEventLoop class
**
** Copyright (C) 1992-2007 Trolltech ASA.  All rights reserved.
**
** This file is part of the kernel module of the TQt GUI Toolkit.
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** License versions 2.0 or 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Alternatively you may (at your option) use any
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** been publicly approved by Trolltech ASA (or its successors, if any)
** and the KDE Free TQt Foundation.
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**********************************************************************/

#ifndef TQEVENTLOOP_H
#define TQEVENTLOOP_H

#ifndef QT_H
#include "qobject.h"
#include "qsocketnotifier.h"
#endif // QT_H

class TQEventLoopPrivate;
class TQSocketNotifier;
class TQTimer;
#ifdef Q_WS_MAC
struct timeval; //stdc struct
struct TimerInfo; //internal structure (qeventloop_mac.cpp)
#endif

#if defined(QT_THREAD_SUPPORT)
class TQMutex;
#endif // QT_THREAD_SUPPORT


class Q_EXPORT TQEventLoop : public TQObject
{
    Q_OBJECT

public:
    TQEventLoop( TQObject *parent = 0, const char *name = 0 );
    ~TQEventLoop();

    enum ProcessEvents {
	AllEvents		= 0x00,
	ExcludeUserInput	= 0x01,
	ExcludeSocketNotifiers	= 0x02,
	WaitForMore		= 0x04
    };
    typedef uint ProcessEventsFlags;

    void processEvents( ProcessEventsFlags flags, int maxtime );
    virtual bool processEvents( ProcessEventsFlags flags );

    virtual bool hasPendingEvents() const;

    virtual void registerSocketNotifier( TQSocketNotifier * );
    virtual void unregisterSocketNotifier( TQSocketNotifier * );
    void setSocketNotifierPending( TQSocketNotifier * );
    int activateSocketNotifiers();

    int activateTimers();
    int timeToWait() const;

    virtual int exec();
    virtual void exit( int retcode = 0 );

    virtual int enterLoop();
    virtual void exitLoop();
    virtual int loopLevel() const;

    virtual void wakeUp();

signals:
    void awake();
    void aboutToBlock();

private:
#if defined(Q_WS_MAC)
    friend TQMAC_PASCAL void qt_mac_select_timer_callbk(EventLoopTimerRef, void *);
    int macHandleSelect(timeval *);
    void macHandleTimer(TimerInfo *);
#endif // Q_WS_MAC

    // internal initialization/cleanup - implemented in various platform specific files
    void init();
    void cleanup();
    virtual void appStartingUp();
    virtual void appClosingDown();

    // data for the default implementation - other implementations should not
    // use/need this data
    TQEventLoopPrivate *d;

    friend class TQApplication;
};

#endif // TQEVENTLOOP_H