slideshow.cpp

Trolltech公司发布的图形界面操作系统。可在qt-embedded-2.3.10平台上编译为嵌入式图形界面操作系统。

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** Copyright (C) 2000-2005 Trolltech AS.  All rights reserved.
**
** This file is part of the Qtopia Environment.
** 
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** under the terms of the GNU General Public License as published by the
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** LICENSE.GPL.
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** the code of this program with Qtopia applications copyrighted, developed
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#include "slideshow.h"

SlideShow::SlideShow( QObject* parent, const char* name )
    : QObject( parent, name )
{
    // When timeout advance to next image in collection
    connect( &timer, SIGNAL( timeout() ), this, SLOT( advance() ) );
}

void SlideShow::setFirstImage( const DocLnk& image )
{
    // Find image in collection and update iterator with this image
    QValueList<DocLnk>::ConstIterator it;
    for( it = collection.begin(); 
        it != collection.end() && (*it).file() != image.file(); ++it );
    if( it != collection.end() ) emit changed( *( collection_iterator = it ) ); 
}

void SlideShow::stop()
{
    timer.stop();
    emit stopped();
}

void SlideShow::advance()
{
    // If at end of collection and not looping through, stop slideshow
    // Otherwise, advance to next image in collection
    ++collection_iterator;
    if( collection_iterator == collection.end() && !loop_through ) {
        timer.stop();
        emit stopped();
    } else {
        if( collection.count() > 1 ) {
            if( collection_iterator == collection.end() )
                collection_iterator = collection.begin();
            emit changed( *collection_iterator );
        }
    }
}