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Initial noon zone implementation
Initial tz_list.c generator
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src/c/watchface.c
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src/c/watchface.c
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static Window *s_main_window;
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static TextLayer *s_beat_layer; // Layer for Swatch Beat Time
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static TextLayer *s_tid_layer; // Layer for TID Time (renamed from s_time_layer)
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static TextLayer *s_noonzone_layer; // Layer for Noon Zone Time
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static const char S32_CHAR[] = "234567abcdefghijklmnopqrstuvwxyz";
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#define S32_CHAR_LEN (sizeof(S32_CHAR) - 1) // 32
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// Clamp result just in case of edge cases (0 - 9999)
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if (b > 9999) b = 9999;
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if (b < 0) b = 0;
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return b;
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}
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···
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last_beat_time = b;
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}
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// --- Noon Zone Time Code ---
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static char s_noonzone_buffer[16]; // Buffer for "NAME:MM:SS\0"
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static int last_noonzone_update_secs = -1; // Cache full secs for update check
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static int last_utc_hour = -1; // Cache hour for zone name lookup
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static const char *last_zone_name_ptr = NULL; // Cache pointer to zone name string
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/**
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* Gets the military timezone name for the longitude where it is currently noon,
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* based on the provided UTC hour.
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* Uses caching to avoid repeated lookups for the same hour.
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*/
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static const char* get_noon_zone_name(int utc_hour) {
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// Check cache first
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if (utc_hour == last_utc_hour && last_zone_name_ptr != NULL) {
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return last_zone_name_ptr;
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}
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const char *name = "???"; // Default for unexpected hours
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switch(utc_hour){
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// Cases map UTC hour to the zone where it's noon
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case 12: name="ZULU"; break;
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case 11: name="ALPHA"; break;
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case 10: name="BRAVO"; break;
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case 9: name="CHARLIE"; break;
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case 8: name="DELTA"; break;
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case 7: name="ECHO"; break;
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case 6: name="FOXTROT"; break;
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case 5: name="GOLF"; break;
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case 4: name="HOTEL"; break;
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// INDIA is skipped
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case 3: name="JULIET"; break;
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case 2: name="KILO"; break;
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case 1: name="LIMA"; break;
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case 0: name="MIKE"; break; // or YANKEE
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// Other half of the day (wrapping around)
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case 23: name="NOVEMBER"; break;
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case 22: name="OSCAR"; break;
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case 21: name="PAPA"; break;
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case 20: name="QUEBEC"; break;
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case 19: name="ROMEO"; break;
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case 18: name="SIERRA"; break;
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case 17: name="TANGO"; break;
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case 16: name="UNIFORM"; break;
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case 15: name="VICTOR"; break;
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case 14: name="WHISKEY"; break;
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case 13: name="X-RAY"; break;
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}
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// Update cache
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last_utc_hour = utc_hour;
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last_zone_name_ptr = name;
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return name;
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}
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/**
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* Updates the Noon Zone time TextLayer if the time (seconds) has changed.
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*/
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static void update_noonzone_time(time_t current_seconds_utc) {
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// Check if the second has changed since the last update
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if (current_seconds_utc == last_noonzone_update_secs) {
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return;
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}
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struct tm *utc_tm = gmtime(¤t_seconds_utc);
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if (!utc_tm) { // Check if gmtime failed
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return;
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}
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const char *zone_name = get_noon_zone_name(utc_tm->tm_hour);
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// Format as NAME:MM:SS
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snprintf(s_noonzone_buffer, sizeof(s_noonzone_buffer),
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"%s:%02d:%02d",
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zone_name,
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utc_tm->tm_min,
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utc_tm->tm_sec);
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text_layer_set_text(s_noonzone_layer, s_noonzone_buffer);
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// Cache the time of this update
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last_noonzone_update_secs = current_seconds_utc;
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}
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// --- TID Time Update ---
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static char s_tid_buffer[14]; // Buffer for TID string (13 chars + null)
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···
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// Update both time displays
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update_beat_time(seconds);
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update_tid_time(seconds, milliseconds);
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update_noonzone_time(seconds);
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}
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static void main_window_load(Window *window) {
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GRect bounds = layer_get_bounds(window_layer);
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// Define layout constants (adjust heights based on font sizes)
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const int16_t top_margin = 5;
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const int16_t bottom_margin = 12;
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const int16_t beat_layer_height = 30; // Approx height for FONT_KEY_GOTHIC_28_BOLD
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const int16_t tid_layer_height = 30; // Approx height for FONT_KEY_GOTHIC_24_BOLD
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const int16_t v_padding = 2; // Vertical padding between layers
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// Allocate heights roughly - adjust based on visual results
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const int16_t beat_h = 30;
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const int16_t noonzone_h = 30;
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const int16_t tid_h = 26;
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// Calculate total height needed (excluding top/bottom margins provided by layer positioning)
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const int16_t total_inner_h = beat_h + noonzone_h + tid_h + 2 * v_padding;
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// Distribute remaining vertical space as top/bottom margin
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const int16_t top_margin = (bounds.size.h - total_inner_h) / 2;
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const int16_t bottom_margin = bounds.size.h - total_inner_h - top_margin;
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// Calculate Y positions
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int16_t beat_y = top_margin;
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int16_t tid_y = bounds.size.h - tid_layer_height - bottom_margin;
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int16_t noonzone_y = beat_y + beat_h + v_padding;
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int16_t tid_y = noonzone_y + noonzone_h + v_padding;
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// Create Beat Time TextLayer (Top)
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s_beat_layer = text_layer_create(
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GRect(0, beat_y, bounds.size.w, beat_layer_height));
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GRect(0, beat_y, bounds.size.w, beat_h));
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text_layer_set_background_color(s_beat_layer, GColorClear);
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text_layer_set_text_color(s_beat_layer, GColorBlack);
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text_layer_set_text(s_beat_layer, "@--.-"); // Initial placeholder
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text_layer_set_text_alignment(s_beat_layer, GTextAlignmentCenter);
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layer_add_child(window_layer, text_layer_get_layer(s_beat_layer));
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// Create Noon Zone Time TextLayer (Middle)
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s_noonzone_layer = text_layer_create(
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GRect(0, noonzone_y, bounds.size.w, noonzone_h));
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text_layer_set_background_color(s_noonzone_layer, GColorClear);
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text_layer_set_text_color(s_noonzone_layer, GColorBlack);
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text_layer_set_text(s_noonzone_layer, "ZONE:--:--"); // Initial placeholder
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text_layer_set_font(s_noonzone_layer, fonts_get_system_font(FONT_KEY_GOTHIC_24_BOLD)); // Adjust font
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text_layer_set_text_alignment(s_noonzone_layer, GTextAlignmentCenter);
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layer_add_child(window_layer, text_layer_get_layer(s_noonzone_layer));
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// Create TID TextLayer (Bottom)
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s_tid_layer = text_layer_create(
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GRect(0, tid_y, bounds.size.w, tid_layer_height));
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GRect(0, tid_y, bounds.size.w, tid_h));
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text_layer_set_background_color(s_tid_layer, GColorClear);
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text_layer_set_text_color(s_tid_layer, GColorBlack);
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text_layer_set_text(s_tid_layer, "loading tid..."); // Initial placeholder
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// Destroy TextLayers
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text_layer_destroy(s_beat_layer);
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text_layer_destroy(s_tid_layer); // Renamed from s_time_layer
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text_layer_destroy(s_noonzone_layer);
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}
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static void init() {
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time_ms(&seconds, &milliseconds);
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update_beat_time(seconds); // Initial beat time
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update_tid_time(seconds, milliseconds); // Initial TID time
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update_noonzone_time(seconds); // Initial noon zone time
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// Register with TickTimerService to update every second