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static ap_math math;
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static ap_math math;
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// this is the number of degrees between top centre of scale and
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// this is the number of degrees between top centre of scale and
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// left or right hand end of scale : 90 degrees produces a semicircle.
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// left or right hand end of scale : 90 degrees produces a semicircle.
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displayDial_t::displayDial_t(uint8_t x, uint8_t y, uint8_t siz) : m_xo(x),m_yo(y),m_siz(siz),m_a1(90)
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displayDial_t::displayDial_t(display_t & display,uint8_t x, uint8_t y, uint8_t siz,uint16_t angle_) :m_display(display), m_xo(x),m_yo(y),m_siz(siz),m_a1(angle_)
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{
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{
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}
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}
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/* position is integer from 0 to SINE_STEPS */
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/* position is integer from 0 to SINE_STEPS */
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void
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void
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displayDial_t::draw_needle (display_t & display, uint16_t position)
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displayDial_t::draw_needle (int16_t position)
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{
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{
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  int ang = math.SINE_SCALING * ((position - (math.SINE_STEPS/2)) * m_a1) / (math.SINE_STEPS/2);
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  int ang = math.SINE_SCALING * ((position - (math.SINE_STEPS/2)) * m_a1) / (math.SINE_STEPS/2);
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  int si = math.ap_sin (ang);
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  int si = math.ap_sin (ang);
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  int co = math.ap_cos (ang);
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  int co = math.ap_cos (ang);
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  xs = -xl;
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  xs = -xl;
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  ys = -yl;
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  ys = -yl;
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  int step;
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  int step;
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  for(step =0; step < 3; step++)
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  for(step =0; step < 3; step++)
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    {
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    {
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    display.drawLine (math.AP_SCALE(si*si2-xs) + m_xo, m_yo - math.AP_SCALE(co * si2 - ys),
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    m_display.drawLine (math.AP_SCALE(si*si2-xs) + m_xo, m_yo - math.AP_SCALE(co * si2 - ys),
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    math.AP_SCALE(si*si3-xs) + m_xo,m_yo - math.AP_SCALE(co * si3 - ys), INVERT);
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    math.AP_SCALE(si*si3-xs) + m_xo,m_yo - math.AP_SCALE(co * si3 - ys), INVERT);
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    xs+=xl;
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    xs+=xl;
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    ys+=yl;
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    ys+=yl;
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    }
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    }
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 }
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 }
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void displayDial_t::draw_scale (display_t & display, int16_t low, int16_t high, uint8_t width, uint8_t num_step,int16_t scale)
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void displayDial_t::draw_scale ( int16_t low, int16_t high, uint8_t width, uint8_t num_step,int16_t scale)
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{
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{
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  int sz;
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  int ang;
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  int ang;
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  int sc_low  = low/scale;
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  int sc_low  = low/scale;
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  int sc_high = high/scale;
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  int sc_high = high/scale;
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  int step = 256 * m_a1 * 2 / (4 * (sc_high - sc_low));
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  int step = 256 * m_a1 * 2 / (4 * (sc_high - sc_low));
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  int t;
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  int t;
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        case -2:
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        case -2:
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          len = width / 2;
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          len = width / 2;
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          break;
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          break;
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        }
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        }
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      display.drawLine (math.AP_SCALE((m_siz)*si) + m_xo, m_yo - math.AP_SCALE((m_siz) * co),
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      m_display.drawLine (math.AP_SCALE((m_siz)*si) + m_xo, m_yo - math.AP_SCALE((m_siz) * co),
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      math.AP_SCALE((m_siz-len)*si) + m_xo,
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      math.AP_SCALE((m_siz-len)*si) + m_xo,
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                m_yo - math.AP_SCALE((m_siz - len) * co), WHITE);
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                m_yo - math.AP_SCALE((m_siz - len) * co), WHITE);
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      ang += step;
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      ang += step;
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    }
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    }
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