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/**********************************************************************
** Copyright (C) 2000 Trolltech AS. All rights reserved.
**
** This file is part of Qtopia Environment.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** 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.
**
**********************************************************************/
#include <qlabel.h>
#include <qtimer.h>
#include <qfile.h>
#include <qtextstream.h>
#include <qlayout.h>
#include <qwhatsthis.h>
#include "graph.h"
#include "memory.h"
MemoryInfo::MemoryInfo( QWidget *parent, const char *name, WFlags f )
: QWidget( parent, name, f )
{
QVBoxLayout *vb = new QVBoxLayout( this, 5 );
totalMem = new QLabel( this );
vb->addWidget( totalMem );
data = new GraphData();
graph = new BarGraph( this );
graph->setFrameStyle( QFrame::Panel | QFrame::Sunken );
vb->addWidget( graph, 1 );
graph->setData( data );
legend = new GraphLegend( this );
vb->addWidget( legend );
legend->setData( data );
swapMem = new QLabel( this );
vb->addWidget( swapMem );
swapdata = new GraphData();
swapgraph = new BarGraph( this );
swapgraph->setFrameStyle( QFrame::Panel | QFrame::Sunken );
vb->addWidget( swapgraph, 1 );
swapgraph->setData( swapdata );
swaplegend = new GraphLegend( this );
vb->addWidget( swaplegend );
swaplegend->setData( swapdata );
vb->addStretch( 1 );
updateData();
QTimer *t = new QTimer( this );
connect( t, SIGNAL( timeout() ), this, SLOT( updateData() ) );
t->start( 5000 );
QWhatsThis::add( this, tr( "This page shows how memory (i.e. RAM) is being allocated on your device.\nMemory is categorized as follows:\n\n1. Used - memory used to by Opie and any running applications.\n2. Buffers - temporary storage used to improve performance\n3. Cached - information that has recently been used, but has not been freed yet.\n4. Free - memory not currently used by Opie or any running applications." ) );
}
MemoryInfo::~MemoryInfo()
{
delete data;
}
void MemoryInfo::updateData()
{
QFile file( "/proc/meminfo" );
if ( file.open( IO_ReadOnly ) )
{
// local variables
QString line;
QString identifier;
QString value;
int position;
QTextStream t( &file );
while ( !t.atEnd() )
{
// read a line
line = t.readLine();
// extract identifier and value from line
position = line.find( ":" );
identifier = line.left( position );
value = line.mid( position + 1, line.length() - position - 3 );
value = value.stripWhiteSpace();
// copy values in variables
if ( identifier == "MemTotal" )
{
total = value.toULong();
} else if ( identifier == "MemFree" )
{
memfree = value.toULong();
} else if ( identifier == "Buffers" )
{
buffers = value.toULong();
} else if ( identifier == "Cached" )
{
cached = value.toULong();
} else if ( identifier == "SwapCached" )
{
} else if ( identifier == "SwapTotal" )
{
swaptotal = value.toULong();
} else if ( identifier == "SwapFree" )
{
swapfree = value.toULong();
}
}
file.close();
// calculate values
used = total - memfree;
swapused = swaptotal - swapfree;
realUsed = total - ( buffers + cached + memfree );
// visualize values
totalMem->setText( tr( "Total Memory: %1 kB" ).arg( total ) );
data->clear();
data->addItem( tr("Used (%1 kB)").arg(realUsed), realUsed );
data->addItem( tr("Buffers (%1 kB)").arg(buffers), buffers );
data->addItem( tr("Cached (%1 kB)").arg(cached), cached );
data->addItem( tr("Free (%1 kB)").arg(memfree), memfree );
graph->hide();
graph->show();
legend->update();
if (swaptotal > 0)
{
swapMem->setText( tr( "Total Swap: %1 kB" ).arg( swaptotal ) );
swapdata->clear();
swapdata->addItem( tr("Used (%1 kB)").arg(swapused), swapused );
swapdata->addItem( tr("Free (%1 kB)").arg(swapfree), swapfree );
swapMem->show();
swapgraph->show();
swaplegend->show();
swapgraph->repaint( FALSE );
swaplegend->update();
}
else
{
swapMem->hide();
swapgraph->hide();
swaplegend->hide();
}
}
}
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