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path: root/core/settings/citytime/stylusnormalizer.cpp
authorkergoth <kergoth>2002-01-25 22:14:26 (UTC)
committer kergoth <kergoth>2002-01-25 22:14:26 (UTC)
commit15318cad33835e4e2dc620d033e43cd930676cdd (patch) (side-by-side diff)
treec2fa0399a2c47fda8e2cd0092c73a809d17f68eb /core/settings/citytime/stylusnormalizer.cpp
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Initial revision
Diffstat (limited to 'core/settings/citytime/stylusnormalizer.cpp') (more/less context) (ignore whitespace changes)
-rw-r--r--core/settings/citytime/stylusnormalizer.cpp98
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diff --git a/core/settings/citytime/stylusnormalizer.cpp b/core/settings/citytime/stylusnormalizer.cpp
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+++ b/core/settings/citytime/stylusnormalizer.cpp
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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;
+} \ No newline at end of file