From 15318cad33835e4e2dc620d033e43cd930676cdd Mon Sep 17 00:00:00 2001
From: kergoth <kergoth>
Date: Fri, 25 Jan 2002 22:14:26 +0000
Subject: Initial revision

---
(limited to 'core/settings/citytime/stylusnormalizer.cpp')

diff --git a/core/settings/citytime/stylusnormalizer.cpp b/core/settings/citytime/stylusnormalizer.cpp
new file mode 100644
index 0000000..62de28b
--- a/dev/null
+++ b/core/settings/citytime/stylusnormalizer.cpp
@@ -0,0 +1,98 @@
+/**********************************************************************
+** 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
--
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