meter.h

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//
//  Copyright (c) 1994, 1995, 2006 by Mike Romberg ( mike.romberg@noaa.gov )
//
//  This file may be distributed under terms of the GPL
//
 
#ifndef _METER_H_
#define _METER_H_
 
#include "xosview.h"
#include <iostream>
 
 
class Meter {
public:
  Meter( XOSView *parent, const char *title = "", const char *legend ="",
     int docaptions = 0, int dolegends = 0, int dousedlegends = 0 );
  virtual ~Meter( void );
 
  virtual const char *name( void ) const { return "Meter"; }
  void resize( int x, int y, int width, int height );
  virtual void checkevent( void ) = 0;
  virtual void draw( void ) = 0;
  void title( const char *title );
  const char *title( void ) { return title_; }
  void legend( const char *legend );
  const char *legend( void ) { return legend_; }
  void docaptions( int val ) { docaptions_ = val; }
  void dolegends( int val ) { dolegends_ = val; }
  void dousedlegends( int val ) { dousedlegends_ = val; }
  int requestevent( void ){
    if (priority_ == 0) {
      std::cerr << "Warning:  meter " << name() << " had an invalid priority "
                << "of 0. Resetting to 1..." << std::endl;
      priority_ = 1;
    }
    int rval = counter_ % priority_;
    counter_ = (counter_ + 1) % priority_;
    return !rval;
  }
 
  int getX() const { return x_; }
  int getY() const { return y_; }
  int getWidth() const { return width_; }
  int getHeight() const { return height_; }
 
  virtual void checkResources( void );
 
  static double scaleValue( double value, char *scale, bool metric );
 
protected:
  XOSView *parent_;
  int x_, y_, width_, height_, docaptions_, dolegends_, dousedlegends_;
  int priority_, counter_;
  char *title_, *legend_;
  unsigned long textcolor_;
  double samplesPerSecond() { return 1.0*MAX_SAMPLES_PER_SECOND/priority_; }
  double secondsPerSample() { return 1.0/samplesPerSecond(); }
 
private:
};
 
#endif