/data/gitorious.org/libyui/libyui-master/src/YUI.h

/**************************************************************************
Copyright (C) 2000 - 2010 Novell, Inc.
All Rights Reserved.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

**************************************************************************/


/*---------------------------------------------------------------------\
|                                                                      |
|                      __   __    ____ _____ ____                      |
|                      \ \ / /_ _/ ___|_   _|___ \                     |
|                       \ V / _` \___ \ | |   __) |                    |
|                        | | (_| |___) || |  / __/                     |
|                        |_|\__,_|____/ |_| |_____|                    |
|                                                                      |
|                               core system                            |
|                                                        (C) SuSE GmbH |
\----------------------------------------------------------------------/

  File:         YUI.h

  Author:       Stefan Hundhammer <sh@suse.de>

/-*/

#ifndef YUI_h
#define YUI_h

#include <pthread.h>
#include <string>

#include "YTypes.h"

using std::string;

class YApplication;
class YWidget;
class YWidgetFactory;
class YOptionalWidgetFactory;
class YEvent;
class YBuiltinCaller;
class YDialog;
class YMacroPlayer;
class YMacroRecorder;


class YUI
{
    friend class YUIFunction;
    friend class YUITerminator;

protected:
    YUI( bool withThreads );

public:

    virtual ~YUI();

    void shutdownThreads();

    static YUI * ui();

    static YWidgetFactory * widgetFactory();

    static YOptionalWidgetFactory * optionalWidgetFactory();

    static YApplication * app();

    static YApplication * application() { return app(); }
    static YApplication * yApp()        { return app(); }

    static void ensureUICreated();

    
protected:
    
    virtual YWidgetFactory * createWidgetFactory() = 0;

    virtual YOptionalWidgetFactory * createOptionalWidgetFactory() = 0;

    virtual YApplication * createApplication() = 0;

    
public:

    virtual void blockEvents( bool block = true ) { _eventsBlocked = block; }

    void unblockEvents() { blockEvents( false ); }

    virtual bool eventsBlocked() const { return _eventsBlocked; }

    virtual void deleteNotify( YWidget * widget ) {}

    void topmostConstructorHasFinished();

    bool runningWithThreads() const { return _withThreads; }

    void uiThreadMainLoop();

    YBuiltinCaller * builtinCaller() const { return _builtinCaller; }

    void setBuiltinCaller( YBuiltinCaller * caller )
        { _builtinCaller = caller; }

    virtual YEvent * runPkgSelection( YWidget * packageSelector ) = 0;


protected:

    virtual void idleLoop( int fd_ycp ) = 0;

    void terminateUIThread();

    void createUIThread();
    friend void *start_ui_thread( void *ui_int );

    virtual void uiThreadDestructor();

    void signalUIThread();

    bool waitForUIThread();

    void signalYCPThread();

    bool waitForYCPThread();

    void setButtonOrderFromEnvironment();


    //
    // Data members
    //

    bool _withThreads;

    pthread_t _uiThread;

    YBuiltinCaller * _builtinCaller;

    int pipe_to_ui[2];

    int pipe_from_ui[2];

    bool _terminate_ui_thread;

    bool _eventsBlocked;

private:
    
    static YUI * _ui;
};



#endif // YUI_h