Added KDE3 version of ktechlab

git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/applications/ktechlab@1095338 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 278 insertions, 0 deletions

diff --git a/src/gui/doublespinbox.cpp b/src/gui/doublespinbox.cpp
new file mode 100644
index 0000000..b8672b5
--- /dev/null
+++ b/src/gui/doublespinbox.cpp
@@ -0,0 +1,278 @@
+/***************************************************************************
+ *   Copyright (C) 2003-2004 by David Saxton                               *
+ *   david@bluehaze.org                                                    *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ ***************************************************************************/
+
+#include "cnitem.h"
+#include "doublespinbox.h"
+
+#include <kdebug.h>
+#include <kglobal.h>
+#include <klocale.h>
+
+#include <qlineedit.h>
+#include <qregexp.h>
+#include <qtimer.h>
+
+#include <algorithm>
+#include <cmath>
+using namespace std;
+
+
+inline int roundDouble( double val )
+{
+	return (val > 0) ? int(val+0.5) : int(val-0.5);
+}
+
+
+DoubleSpinBox::DoubleSpinBox( double lower, double upper, double minAbs, double value, const QString &unit, QWidget * parent )
+	: QSpinBox( parent )
+{
+	m_lastEmittedValue = value;
+	m_unit = unit;
+	m_minValue = lower;
+	m_maxValue = upper;
+	m_minAbsValue = minAbs;
+	m_queuedSuffix = QString::null;
+	
+	editor()->setAlignment( Qt::AlignRight );
+	
+	connect( this, SIGNAL(valueChanged(int)), this, SLOT(checkIfChanged()) );
+	QSpinBox::setMinValue( -(1<<30) );
+	QSpinBox::setMaxValue( +(1<<30) );	
+	setValue( value );
+	
+	setValidator( 0 );
+}
+
+
+DoubleSpinBox::~DoubleSpinBox()
+{
+}
+
+
+double DoubleSpinBox::value()
+{
+	return getDisplayedNumber( 0 ) * getMult();
+}
+
+
+void DoubleSpinBox::setValue( double value )
+{
+	if ( value > maxValue() )
+		value = maxValue();
+	
+	else if ( value < minValue() )
+		value = minValue();
+	
+	if ( std::abs(value) < m_minAbsValue*0.9999 )
+		value = 0.0;
+	
+	updateSuffix( value );
+	
+	QSpinBox::setValue( roundDouble( (value / Item::getMultiplier( value )) * 100 ) );
+}
+
+
+void DoubleSpinBox::setUnit( const QString & unit )
+{
+	updateSuffix( value() );
+	m_unit = unit;
+}
+
+
+void DoubleSpinBox::updateSuffix( double value )
+{
+	m_queuedSuffix = " " + CNItem::getNumberMag( value ) + m_unit;
+	
+	// Set suffix to be empty if it is nothing but white space
+	if ( m_queuedSuffix.stripWhiteSpace().isEmpty() )
+		m_queuedSuffix = "";
+	
+	QTimer::singleShot( 0, this, SLOT(setQueuedSuffix()) );
+}
+
+
+void DoubleSpinBox::setQueuedSuffix()
+{
+	bool changed = false;
+	if ( !m_queuedSuffix.isNull() && suffix() != m_queuedSuffix )
+	{
+		setSuffix( m_queuedSuffix );
+		changed = true;
+	}
+	m_queuedSuffix = QString::null;
+	
+	if ( changed )
+		emit valueChanged( value() );
+}
+
+
+double DoubleSpinBox::getMult()
+{
+	QString text = this->text().stripWhiteSpace();
+	if ( !m_queuedSuffix.isNull() )
+	{
+		QString nsSuffix = suffix().stripWhiteSpace();
+		
+		if ( nsSuffix.isEmpty() )
+			text.append( m_queuedSuffix );
+		else
+			text.replace( nsSuffix, m_queuedSuffix );
+	}
+	
+	if ( text.length() == 0 )
+		return 1.0;
+	
+	if ( text.endsWith( m_unit, false ) )
+		text = text.remove( text.length() - m_unit.length(), m_unit.length() );
+	
+	text.stripWhiteSpace();
+	
+	QChar siExp = text[ text.length()-1 ];
+	
+	if ( siExp.isLetter() || siExp.isSymbol() ) 
+		return CNItem::getMultiplier((QString)siExp);
+	
+	else
+		return 1;
+}
+
+
+double DoubleSpinBox::getDisplayedNumber( bool * ok )
+{
+	KLocale * locale = KGlobal::locale();
+	
+	// Fetch the characters that we don't want to discard
+	const QString exclude = locale->decimalSymbol()
+			+ locale->thousandsSeparator()
+			+ locale->positiveSign()
+			+ locale->negativeSign();
+	
+	QString number = cleanText().remove( QRegExp("[^"+exclude+"\\d]") );
+	
+	return locale->readNumber( number, ok );
+}
+
+
+int DoubleSpinBox::mapTextToValue( bool * ok )
+{
+	(void)ok;
+	
+	double value = this->value();
+	
+	if ( value > maxValue() )
+		value = maxValue();
+	
+	else if ( value < minValue() )
+		value = minValue();
+	
+	if ( std::abs(value) < m_minAbsValue*0.9999 )
+		value = 0.0;
+	
+	updateSuffix( value );
+	
+	value /= Item::getMultiplier( value );
+	
+	// Precision of 2 extra digits
+	return int( value * 100 );
+}
+
+
+QString DoubleSpinBox::mapValueToText( int v )
+{
+	double val = double(v)/100.0;
+	
+	int leftDigits = (int)floor( log10( abs(val) ) ) + 1;
+	if ( leftDigits < 0 )
+		leftDigits = 0;
+	else if ( leftDigits > 3 )
+		leftDigits = 3;
+	
+	KLocale * locale = KGlobal::locale();
+	return locale->formatNumber( val, 3-leftDigits );
+}
+
+
+void DoubleSpinBox::checkIfChanged()
+{
+	double newValue = value();
+	
+	if ( m_lastEmittedValue == newValue )
+		return;
+	
+	m_lastEmittedValue = newValue;
+	emit valueChanged( m_lastEmittedValue );
+}
+
+
+double DoubleSpinBox::roundToOneSF( double value )
+{
+	if ( value == 0.0 )
+		return 0.0;
+	
+	value *= 1.000001;
+	double tens = pow( 10.0, floor(log10( abs(value) )) );
+	
+	return int ( value / tens ) * tens;
+}
+
+
+void DoubleSpinBox::stepUp()
+{
+	double value = roundToOneSF( this->value() );
+	
+	if ( value == 0 )
+		value = m_minAbsValue;
+	
+	else if ( value > 0 )
+		value += std::pow( 10., std::floor( std::log10(value) ) );
+	
+	else
+	{
+		double sub = std::pow(10., std::floor( std::log10(std::abs(value))-1) );
+		value += std::pow( 10., std::floor( std::log10(std::abs(value)-sub) ) );
+	}
+	
+	value *= 1.00001;
+	
+	if ( std::abs(value) < m_minAbsValue )
+		value = 0.;
+	
+	setValue( value );
+}
+
+
+void DoubleSpinBox::stepDown()
+{
+	double value = roundToOneSF( this->value() );
+	
+	if ( value == 0 )
+		value = -m_minAbsValue;
+	
+	else if ( value > 0 )
+	{
+		double sub = std::pow(10., std::floor( std::log10(value)-1) );
+		value -= std::pow( 10., std::floor( std::log10(value-sub) ) );
+	}
+	else
+	{
+		double add = std::pow(10., std::floor( std::log10(std::abs(value))-1) );
+		value -= std::pow( 10., std::floor( std::log10(std::abs(value)+add) ) );
+	}
+	
+	value *= 1.00001;
+	
+	if ( std::abs(value) < m_minAbsValue )
+		value = 0.;
+	
+	setValue( value );
+}
+
+#include "doublespinbox.moc"
+