/****************************************************************************
**
**
** This file is part of the Phone Edition of the Qtopia Toolkit.
**
** This software is licensed under the terms of the GNU General Public
** License (GPL) version 2.
**
** See http://www.trolltech.com/gpl/ for GPL licensing information.
**
** Contact info@trolltech.com if any conditions of this licensing are
** not clear to you.
**
**
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#include <qtopianamespace.h>
#include <qwindowsystem_qws.h>
#include <QStringList>
#include <QDir>
#include <qtopialog.h>
#include <qvaluespace.h>

#define CLASS_BACKLIGHT "/sys/class/backlight/"

QTOPIA_EXPORT int qpe_sysBrightnessSteps()
{
   	int nMax = 0; 

    	// List backlight class subdirectories
    	QDir iClassBacklight( CLASS_BACKLIGHT );
    	QStringList iDirectory( iClassBacklight.entryList() );
    	QDir iDeviceBacklight;
     	// if a directory is set then backlight module is loaded
    	if (iDirectory.count()==0) 
		return -1;

	QString szPath( CLASS_BACKLIGHT );
	szPath.append( iDirectory.at(2).toLocal8Bit().constData() );
	szPath.append( "/" );
	iDeviceBacklight.setPath( szPath );
    
	if (iDeviceBacklight.exists("max_brightness")) {
	
   		//Read and return value
		QFile file;
		QString szFile( CLASS_BACKLIGHT );
		szFile.append( iDirectory.at(2).toLocal8Bit().constData() );
		szFile.append( "/" );
		szFile.append( "max_brightness" );

		file.setFileName( szFile );
	     	file.open( QIODevice::ReadOnly | QIODevice::Text);
		//qWarning( file.readLine().toLatin1() );
		QString szRead( file.readLine() );
		//nMax = 64; //file.readLine().toInt();
     		file.close();

    	}
	return 255;
}

QTOPIA_EXPORT void qpe_setBrightness(int value)
{
    	int nMax = 0; 
	QString szvalue;

    	if(value <= 1) {
	      system("apm -s");
	}
	else {

	    	// List backlight class subdirectories
	    	QDir iClassBacklight( CLASS_BACKLIGHT );
	    	QStringList iDirectory( iClassBacklight.entryList() );
	    	QDir iDeviceBacklight;
	
		QString szPath( CLASS_BACKLIGHT );
		szPath.append( iDirectory.at(2).toLocal8Bit().constData() );
		szPath.append( "/" );
		iDeviceBacklight.setPath( szPath );
			
	        if (iDeviceBacklight.exists("brightness")) {
	
	                //Read and return value
	                QFile file;
	                QString szFile( CLASS_BACKLIGHT );
	                szFile.append( iDirectory.at(2).toLocal8Bit().constData() );
			szFile.append( "/" );
	                szFile.append( "brightness" );
	
	                file.setFileName( szFile );
	                file.open( QIODevice::ReadWrite | QIODevice::Text);
			value = value * 64 / 255;
	                file.write( szvalue.number(value,10).toLatin1() , szvalue.number(value,10).size() );
	                file.close();
		}
        }
}