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meter.h

/***************************************************************************
 *   Copyright (C) 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.                                   *
 ***************************************************************************/

#ifndef METER_H
#define METER_H

#include <component.h>

/**
@author David Saxton
*/
00019 class Meter : public Component
{
public:
      Meter( ICNDocument *icnDocument, bool newItem, const char *id );
      ~Meter();
      
      virtual void stepNonLogic();
00026       virtual bool doesStepNonLogic() const { return true; }
      virtual void drawShape( QPainter &p );
      virtual bool contentChanged() const;
      
protected:
      QString displayText();
      virtual void dataChanged();
      /**
       * Return the value / current, or whatever the meter is measuring
       */
      virtual double meterValue() = 0;
      
      double calcProp( double v ) const;
      
      bool b_firstRun; // If true, then update the text dispalyed
      bool b_timerStarted; // The timer to change the text is started on change
      double m_timeSinceUpdate;
      double m_avgValue;
      double m_old_value;
      double m_minValue;
      double m_maxValue;
      Text *p_displayText;
      QString m_unit;
      
      double m_prevProp; // Used in contentChanged()
};

/**
@short Measures the frequency at a point in the circuit
@author David Saxton
*/
00057 class FrequencyMeter : public Meter
{
public:
      FrequencyMeter( ICNDocument *icnDocument, bool newItem, const char *id = 0L );
      ~FrequencyMeter();
      
      static Item* construct( ItemDocument *itemDocument, bool newItem, const char *id );
      static LibraryItem *libraryItem();
      
protected:
      virtual double meterValue();
      ECNode *m_probeNode;
};

/**
@short Simple resistor
@author David Saxton
*/
00075 class ECAmmeter : public Meter
{
public:
      ECAmmeter( ICNDocument *icnDocument, bool newItem, const char *id = 0L );
      ~ECAmmeter();
      
      static Item* construct( ItemDocument *itemDocument, bool newItem, const char *id );
      static LibraryItem *libraryItem();
      
protected:
      virtual double meterValue();

private:
      VoltageSource *m_voltageSource;
};

/**
@short Displays voltage across terminals
@author David Saxton
*/
00095 class ECVoltMeter : public Meter
{
public:
      ECVoltMeter( ICNDocument *icnDocument, bool newItem, const char *id = 0L );
      ~ECVoltMeter();
      
      static Item* construct( ItemDocument *itemDocument, bool newItem, const char *id );
      static LibraryItem *libraryItem();
      
protected:
      virtual double meterValue();
};

#endif

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