ecresistor.cpp

/***************************************************************************
 *   Copyright (C) 2003 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 "ecresistor.h"

#include "libraryitem.h"
#include "resistance.h"

#include <klocale.h>
#include <qpainter.h>

Item* ECResistor::construct( ItemDocument *itemDocument, bool newItem, const char *id )
{
        return new ECResistor( (ICNDocument*)itemDocument, newItem, id );
}

LibraryItem* ECResistor::libraryItem()
{
        return new LibraryItem(
                "ec/resistor",
                i18n("Resistor"),
                i18n("Discrete"),
                "resistor.png",
                LibraryItem::lit_component,
                ECResistor::construct );
}

ECResistor::ECResistor( ICNDocument *icnDocument, bool newItem, const char *id )
        : Component( icnDocument, newItem, id ? id : "resistor" )
{
        m_name = i18n("Resistor");
        m_desc = i18n("Limits the flow of current, obeying Ohms Law");
        setSize( -16, -8, 32, 16 );
        
        init1PinLeft();
        init1PinRight();
        m_resistance = createResistance( m_pPNode[0], m_pNNode[0], 1. );
        
        createProperty( "resistance", Variant::Type::Double );
        property("resistance")->setCaption( i18n("Resistance") );
        property("resistance")->setUnit( QChar(0x3a9) );
        property("resistance")->setValue(1e4);
        property("resistance")->setMinValue(1e-6);

// TODO: there are standard resistor values dependant on tolerance, user should
// be offered these before a custom resistor type. 
        
        addDisplayText( "res", QRect( -16, -22, 32, 12 ), "", false );
}

ECResistor::~ECResistor()
{
}

void ECResistor::dataChanged()
{
        double resistance = dataDouble("resistance");
        
        QString display = QString::number( resistance / getMultiplier(resistance), 'g', 3 ) + getNumberMag(resistance) + QChar(0x3a9);
        setDisplayText( "res", display );
        
        m_resistance->setResistance(resistance);
}

void ECResistor::drawShape( QPainter &p )
{
        initPainter(p);
        p.drawRect( (int)x()-16, (int)y()-6, width(), 12 );
        deinitPainter(p);
}

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