predicttabwidget.cpp

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/*
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                             Copyright (C) Opie Team <opie-devel@handhelds.org>
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*/

#include "predicttabwidget.h"

#include <qpe/config.h>
#include <qpe/timeconversion.h>

#include <qlabel.h>
#include <qlayout.h>
#include <qpushbutton.h>
#include <qscrollview.h>
#include <qtable.h>

#include <stdlib.h>

PredictTabWidget::PredictTabWidget( QWidget *parent )
        : QWidget( parent, 0x0, 0 )
{
/*
        QVBoxLayout *tmpvb = new QVBoxLayout( this );
        QScrollView *sv = new QScrollView( this );
        tmpvb->addWidget( sv, 0, 0 );
        sv->setResizePolicy( QScrollView::AutoOneFit );
        sv->setFrameStyle( QFrame::NoFrame );
        QWidget *container = new QWidget( sv->viewport() );
        sv->addChild( container );
*/

        QGridLayout *layout = new QGridLayout( this );
        layout->setMargin( 2 );
        layout->setSpacing( 4 );

        // Predicted time drift
        layout->addWidget( new QLabel( tr( "Predicted time drift" ), this ), 0, 0 );
        lblDrift = new QLabel( tr( "n/a" ), this );
        layout->addWidget( lblDrift, 0, 1 );

        // Estimated time difference
        layout->addWidget( new QLabel( tr( "Estimated shift" ), this ), 1, 0 );
        lblDiff = new QLabel( tr( "n/a" ), this );
        layout->addWidget( lblDiff, 1, 1 );

        // Predicted time
        layout->addWidget( new QLabel( tr( "Predicted time" ), this ), 2, 0 );
        lblPredicted = new QLabel( tr( "n/a" ), this );
        layout->addWidget( lblPredicted, 2, 1 );

        // Prediction table
        tblLookups = new QTable( 2, 3, this );
        QFont font(  tblLookups->font() );
        font.setPointSize( font.pointSize() - 2 );
        tblLookups->setFont( font );
        tblLookups->horizontalHeader()->setLabel( 0, tr( "Shift [s/h]" ) );
        tblLookups->horizontalHeader()->setLabel( 1, tr( "Last [h]" ) );
        tblLookups->horizontalHeader()->setLabel( 2, tr( "Offset [s]" ) );
        
        tblLookups->setMinimumHeight( 50 );
        tblLookups->setSizePolicy( QSizePolicy( QSizePolicy::Preferred, QSizePolicy::Maximum ) );
        layout->addMultiCellWidget( tblLookups, 3, 3, 0, 1 );

        // Predict time button
        QPushButton *pb = new QPushButton( tr( "Predict time" ), this );
        connect( pb, SIGNAL(clicked()), this, SLOT(slotPredictTime()) );
        layout->addWidget( pb, 4, 0 );

        // Set predicted time button
        pb = new QPushButton( tr( "Set predicted time" ), this );
        connect( pb, SIGNAL(clicked()), this, SLOT(slotSetPredictedTime()) );
        layout->addWidget( pb, 4, 1 );

        // Initialize values
        Config config( "ntp" );
        config.setGroup( "lookups" );
        int lookupCount = config.readNumEntry( "count", 0 );
        float last, shift, shiftPerSec;
        tblLookups->setNumRows( lookupCount );
        int cw = tblLookups->width() / 4;
        cw = 50;
        tblLookups->sortColumn( 0, FALSE, TRUE );
        _shiftPerSec = 0;
        QString grpname;
        for ( int i=0; i < lookupCount; i++ )
        {
                grpname = "lookup_";
                grpname.append( QString::number( i ) );
                config.setGroup( grpname );
                last = config.readEntry( "secsSinceLast", 0 ).toFloat();
                shift = QString( config.readEntry( "timeShift", 0 ) ).toFloat();
                shiftPerSec =  shift / last;
                _shiftPerSec += shiftPerSec;
                tblLookups->setText( i, 0, QString::number( shiftPerSec * 60 * 60 ) );
                tblLookups->setText( i, 2, QString::number( shift ) );
                tblLookups->setText( i, 1, QString::number( last / ( 60 * 60 ) ) );
        }
        if(lookupCount)
            _shiftPerSec /= lookupCount;
        QString drift = QString::number( _shiftPerSec * 60 * 60);
        drift.append( tr( " s/h" ) );
        lblDrift->setText( drift );

        Config lconfig( "locale" );
        lconfig.setGroup( "Location" );
        tz = lconfig.readEntry( "Timezone", "America/New_York" );
}

PredictTabWidget::~PredictTabWidget()
{
}

void PredictTabWidget::setShiftPerSec( int i )
{
        _shiftPerSec += i;
}

void PredictTabWidget::slotTZChanged( const QString &newtz )
{
        tz = newtz;
}

void PredictTabWidget::slotPredictTime()
{
        Config config( "ntp" );
        config.setGroup( "lookups" );
        int lastTime = config.readNumEntry( "time", 0 );
        config.writeEntry( "lastNtp", TRUE );
        setenv( "TZ", tz, 1 );
        int now = TimeConversion::toUTC( QDateTime::currentDateTime() );
        int corr = int( ( now - lastTime ) * _shiftPerSec );
        QString diff = QString::number( corr );
        diff.append( tr( " seconds" ) );
        lblDiff->setText( diff );
        predictedTime = QDateTime::currentDateTime().addSecs( corr );
        lblPredicted->setText( predictedTime.toString() );
}

void PredictTabWidget::slotSetPredictedTime()
{
        slotPredictTime();
        emit setTime( predictedTime );
}

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