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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 <qpoint.h>
#include <qtimer.h>
#include "stylusnormalizer.h"
static const int FLUSHTIME = 100;
_StylusEvent::_StylusEvent( const QPoint& newPt )
: _pt( newPt ),
_t( QTime::currentTime() )
{
}
_StylusEvent::~_StylusEvent()
{
}
StylusNormalizer::StylusNormalizer( QWidget *parent, const char* name )
: QWidget( parent, name ),
_next( 0 ),
bFirst( true )
{
// initialize _ptList
int i;
for (i = 0; i < SAMPLES; i++ ) {
_ptList[i].setPoint( -1, -1 );
}
_tExpire = new QTimer( this );
QObject::connect( _tExpire, SIGNAL( timeout() ),
this, SLOT( slotAveragePoint() ) );
}
StylusNormalizer::~StylusNormalizer()
{
}
void StylusNormalizer::addEvent( const QPoint& pt )
{
_ptList[_next].setPoint( pt );
_ptList[_next++].setTime( QTime::currentTime() );
if ( _next >= SAMPLES ) {
_next = 0;
}
// make a single mouse click work
if ( bFirst ) {
slotAveragePoint();
bFirst = false;
}
}
void StylusNormalizer::slotAveragePoint( void )
{
QPoint pt( 0, 0 );
QTime tCurr = QTime::currentTime();
int i,
size;
size = 0;
for ( i = 0; i < SAMPLES; i++ ) {
if ( ( (_ptList[i]).time().msecsTo( tCurr ) < FLUSHTIME ) &&
( _ptList[i].point() != QPoint( -1, -1 ) ) ) {
pt += _ptList[i].point();
size++;
}
}
if ( size > 0 )
emit signalNewPoint( pt /= size );
}
void StylusNormalizer::start( void )
{
_tExpire->start( FLUSHTIME );
}
void StylusNormalizer::stop( void )
{
_tExpire->stop();
bFirst = true;
}
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