97 lines
2.1 KiB
C++
97 lines
2.1 KiB
C++
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// clock.cxx - an electric-powered turn indicator.
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// Written by Melchior FRANZ, started 2003.
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//
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// This file is in the Public Domain and comes with no warranty.
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//
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// $Id$
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#include "clock.hxx"
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#include <simgear/timing/sg_time.hxx>
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#include <Main/fg_props.hxx>
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#include <Main/util.hxx>
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Clock::Clock ()
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: _is_serviceable(true),
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_gmt_time_sec(0),
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_offset_sec(0),
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_indicated_sec(0),
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_standstill_offset(0)
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{
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_indicated_string[0] = '\0';
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}
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Clock::~Clock ()
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{
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}
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void
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Clock::init ()
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{
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_serviceable_node = fgGetNode("/instrumentation/clock/serviceable", true);
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_offset_node = fgGetNode("/instrumentation/clock/offset-sec", true);
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_sec_node = fgGetNode("/instrumentation/clock/indicated-sec", true);
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_string_node = fgGetNode("/instrumentation/clock/indicated-string", true);
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}
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void
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Clock::update (double delta_time_sec)
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{
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if (!_serviceable_node->getBoolValue()) {
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if (_is_serviceable) {
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_string_node->setStringValue("");
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_is_serviceable = false;
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}
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return;
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}
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struct tm *t = globals->get_time_params()->getGmt();
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int hour = t->tm_hour;
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int min = t->tm_min;
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int sec = t->tm_sec;
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long gmt = (hour * 60 + min) * 60 + sec;
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int offset = _offset_node->getLongValue();
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if (!_is_serviceable) {
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_standstill_offset -= gmt - _gmt_time_sec;
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} else if (_gmt_time_sec == gmt && _offset_sec == offset)
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return;
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_gmt_time_sec = gmt;
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_offset_sec = offset;
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_indicated_sec = _gmt_time_sec + offset + _standstill_offset;
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_sec_node->setLongValue(_indicated_sec);
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sec += offset;
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while (sec < 0) {
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sec += 60;
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min--;
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}
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while (sec >= 60) {
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sec -= 60;
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min++;
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}
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while (min < 0) {
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min += 60;
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hour--;
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}
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while (min >= 60) {
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min -= 60;
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hour++;
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}
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while (hour < 0)
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hour += 24;
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while (hour >= 24)
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hour -= 24;
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sprintf(_indicated_string, "%02d:%02d:%02d", hour, min, sec);
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_string_node->setStringValue(_indicated_string);
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_is_serviceable = true;
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}
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// end of clock.cxx
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