demultiplexer.cpp

/***************************************************************************
 *   Copyright (C) 2004-2005 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 "demultiplexer.h"

#include "logic.h"
#include "libraryitem.h"

#include <kiconloader.h>
#include <klocale.h>

#include <cmath>

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

LibraryItem* Demultiplexer::libraryItem()
{
        return new LibraryItem(
                "ec/demultiplexer",
                i18n("Demultiplexer"),
                i18n("Integrated Circuits"),
                "ic1.png",
                LibraryItem::lit_component,
                Demultiplexer::construct
                        );
}

Demultiplexer::Demultiplexer( ICNDocument *icnDocument, bool newItem, const char *id )
        : Component( icnDocument, newItem, id ? id : "demultiplexer" )
{
        m_name = i18n("Demultiplexer");
        m_desc = i18n("Seperates the input data stream into components. The value of the input is passed to the \"X\" output selected by the binary number given by the \"A\" inputs.");
        
        m_input = 0;
        
        createProperty( "addressSize", Variant::Type::Int );
        property("addressSize")->setCaption( i18n("Address Size") );
        property("addressSize")->setMinValue(1);
        property("addressSize")->setMaxValue(8);
        property("addressSize")->setValue(1);
        
        // For backwards compatibility
        createProperty( "numInput", Variant::Type::Int );
        property("numInput")->setMinValue(-1);
        property("numInput")->setValue(-1);
        property("numInput")->setHidden(true);
}

Demultiplexer::~Demultiplexer()
{
}


void Demultiplexer::dataChanged()
{
        if ( hasProperty("numInput") && dataInt("numInput") != -1 )
        {
                int addressSize = int( std::ceil( std::log( (double)dataInt("numInput") ) / std::log(2.0) ) );
                property("numInput")->setValue(-1);
                
                if ( addressSize < 1 )
                        addressSize = 1;
                else if ( addressSize > 8 )
                        addressSize = 8;
                
                // This function will get called again when we set the value of numInput
                property("addressSize")->setValue(addressSize);
                return;
        }
        
        if ( hasProperty("numInput") )
        {
                m_variantData["numInput"]->deleteLater();
                m_variantData.remove("numInput");
        }
        
        initPins( unsigned(dataInt("addressSize")) );
}


void Demultiplexer::inStateChanged( bool /*state*/ )
{
        unsigned long long pos = 0;
        for ( unsigned i = 0; i < m_aLogic.size(); ++i )
        {
                if ( m_aLogic[i]->isHigh() )
                        pos += 1 << i;
        }
        for ( unsigned i = 0; i < m_xLogic.size(); ++i )
                m_xLogic[i]->setHigh( (pos == i) && m_input->isHigh() );
}


void Demultiplexer::initPins( unsigned newAddressSize )
{
        unsigned oldAddressSize = m_aLogic.size();
        unsigned long long oldXLogicCount = m_xLogic.size();
        unsigned long long newXLogicCount = 1 << newAddressSize;
        
        if ( newXLogicCount == oldXLogicCount )
                return;
        
        QStringList pins;
        
        for ( unsigned i=0; i<newAddressSize; ++i )
                pins += "A"+QString::number(i);
        for ( unsigned i=newAddressSize; i<(newXLogicCount+(newXLogicCount%2))/2; ++i )
                pins += "";
        pins += "X";
        for ( unsigned i=(newXLogicCount+(newXLogicCount%2))/2+1; i<newXLogicCount; ++i )
                pins += "";
        for ( int i=newXLogicCount-1; i>=0; --i )
                pins += "X"+QString::number(i);
        
        initDIPSymbol( pins, 64 );
        initDIP(pins);
        
        ECNode *node;
        
        if (!m_input)
        {
                node =  ecNodeWithID("X");
                m_input = createLogicIn(node);
                m_input->setCallback( this, (CallbackPtr)(&Demultiplexer::inStateChanged) );
        }
        
        if ( newXLogicCount > oldXLogicCount )
        {
                m_xLogic.resize(newXLogicCount);
                for ( unsigned i = oldXLogicCount; i < newXLogicCount; ++i )
                {
                        node = ecNodeWithID("X"+QString::number(i));
                        m_xLogic.insert( i, createLogicOut(node,false) );
                }
                
                m_aLogic.resize(newAddressSize);
                for ( unsigned i = oldAddressSize; i < newAddressSize; ++i )
                {
                        node = ecNodeWithID("A"+QString::number(i));
                        m_aLogic.insert( i, createLogicIn(node) );
                        m_aLogic[i]->setCallback( this, (CallbackPtr)(&Demultiplexer::inStateChanged) );
                }
        }
        else
        {
                for ( unsigned i = newXLogicCount; i < oldXLogicCount; ++i )
                {
                        QString id = "X"+QString::number(i);
                        removeDisplayText(id);
                        removeElement( m_xLogic[i], false );
                        removeNode(id);
                }
                m_xLogic.resize(newXLogicCount);
                
                for ( unsigned i = newAddressSize; i < oldAddressSize; ++i )
                {
                        QString id = "A"+QString::number(i);
                        removeDisplayText(id);
                        removeElement( m_aLogic[i], false );
                        removeNode(id);
                }
                m_aLogic.resize(newAddressSize);
        }
}

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