flightgear/src/Cockpit/hud_scal.cxx

#include "hud.hxx"


//============== Top of instr_scale class memeber definitions ===============
//
// Notes:
// 1. instr_scales divide the specified location into half and then
//    the half opposite the read direction in half again. A bar is
//    then drawn along the second divider. Scale ticks are drawn
//    between the middle and quarter section lines (minor division
//    markers) or just over the middle line.
//
// 2.  This class was not intended to be instanciated. See moving_scale
//     and guage_instr classes.
//============================================================================
instr_scale ::
instr_scale ( int       x,
              int       y,
              UINT      width,
              UINT      height,
              FLTFNPTR  load_fn,
              UINT      options,
              float    show_range,
              float    maxValue,
              float    minValue,
              float    disp_scale,
              UINT      major_divs,
              UINT      minor_divs,
              UINT      rollover,
              int       dp_showing,
              bool      working ) :
                instr_item( x, y, width, height,
                            load_fn, disp_scale, options, working),
                range_shown  ( show_range ),
                Maximum_value( maxValue   ),
                Minimum_value( minValue   ),
                Maj_div      ( major_divs ),
                Min_div      ( minor_divs ),
                Modulo       ( rollover   ),
                signif_digits( dp_showing )
{
int temp;

  scale_factor   = (float)get_span() / range_shown;
  if( show_range < 0 ) {
    range_shown = -range_shown;
    }
  temp = FloatToInt(Maximum_value - Minimum_value) / 100;
  if( range_shown < temp ) {
    range_shown = temp;
    }
}

instr_scale ::
  instr_scale( const instr_scale & image ) :
            instr_item( (const instr_item &) image),
            range_shown  ( image.range_shown   ),
            Maximum_value( image.Maximum_value ),
            Minimum_value( image.Minimum_value ),
            scale_factor ( image.scale_factor  ),
            Maj_div      ( image.Maj_div       ),
            Min_div      ( image.Min_div       ),
            Modulo       ( image.Modulo        ),
            signif_digits( image.signif_digits )
{
}

instr_scale & instr_scale :: operator = (const instr_scale & rhs )
{
  if( !(this == &rhs)) {
    instr_item::operator = (rhs);
    range_shown   = rhs.range_shown;
    scale_factor  = rhs.scale_factor;
    Maximum_value = rhs.Maximum_value;
    Minimum_value = rhs.Minimum_value;
    Maj_div       = rhs.Maj_div;
    Min_div       = rhs.Min_div;
    Modulo        = rhs.Modulo;
    signif_digits = rhs.signif_digits;
    }
  return *this;
}

instr_scale :: ~ instr_scale () {}