DSWATCH

/**
 * Animation source:
 * http://bestanimations.com/Science/Physics/Physics2.html
 */

#include <pebble.h>

static Window *s_main_window;
static TextLayer *s_time_layer, *s_date_layer;
static GBitmap *s_bitmap = NULL;
static GFont s_time_font, s_date_font;
static BitmapLayer *s_bitmap_layer;
static GBitmapSequence *s_sequence = NULL;

static void load_sequence();

static void timer_handler(void *context) {
  uint32_t next_delay;

  // Advance to the next APNG frame
  if(gbitmap_sequence_update_bitmap_next_frame(s_sequence, s_bitmap, &next_delay)) {
    bitmap_layer_set_bitmap(s_bitmap_layer, s_bitmap);
    layer_mark_dirty(bitmap_layer_get_layer(s_bitmap_layer));

    // Timer for that delay
    app_timer_register(next_delay, timer_handler, NULL);
  } else {
    // Start again
    load_sequence();
  }
}

static void load_sequence() {
  // Free old data
  if(s_sequence) {
    gbitmap_sequence_destroy(s_sequence);
    s_sequence = NULL;
  }
  if(s_bitmap) {
    gbitmap_destroy(s_bitmap);
    s_bitmap = NULL;
  }

  // Create sequence
  s_sequence = gbitmap_sequence_create_with_resource(RESOURCE_ID_ANIMATION);

  // Create GBitmap
  s_bitmap = gbitmap_create_blank(gbitmap_sequence_get_bitmap_size(s_sequence), GBitmapFormat8Bit);

  // Begin animation
  app_timer_register(1, timer_handler, NULL);
}


static void update_time() {
  time_t temp = time(NULL);
  struct tm *tick_time = localtime(&temp);

  // Create a long-lived buffer, and show the time
  static char buffer[] = "00:00";
  if(clock_is_24h_style()) {
    strftime(buffer, sizeof("00:00"), "%H:%M", tick_time);
  } else {
    strftime(buffer, sizeof("00:00"), "%I:%M", tick_time);
  }
  text_layer_set_text(s_time_layer, buffer);

  // Show the date
  static char date_buffer[16];
  strftime(date_buffer, sizeof(date_buffer), "%a %d %b", tick_time);
  text_layer_set_text(s_date_layer, date_buffer);
}
static void tick_handler(struct tm *tick_time, TimeUnits units_changed) {
  update_time();



}

static void main_window_load(Window *window) {
  Layer *window_layer = window_get_root_layer(window);
  GRect bounds = layer_get_bounds(window_layer);

  s_bitmap_layer = bitmap_layer_create(bounds);
  layer_add_child(window_layer, bitmap_layer_get_layer(s_bitmap_layer));

  load_sequence();


  // Create GFonts
  s_time_font = fonts_load_custom_font(resource_get_handle(RESOURCE_ID_FONT_PERFECT_DOS_53));
  s_date_font = fonts_load_custom_font(resource_get_handle(RESOURCE_ID_FONT_PERFECT_DOS_24));

  // Create time TextLayer
  s_time_layer = text_layer_create(GRect(5, 10, 139, 50));
  text_layer_set_background_color(s_time_layer, GColorClear);
  text_layer_set_text_color(s_time_layer, GColorFromRGB(255,255,255));
  text_layer_set_text(s_time_layer, "00:00");
  text_layer_set_font(s_time_layer, s_time_font);
  text_layer_set_text_alignment(s_time_layer, GTextAlignmentCenter);
  layer_add_child(window_get_root_layer(window), text_layer_get_layer(s_time_layer));

  // Create date TextLayer
  s_date_layer = text_layer_create(GRect(0, 56, 144, 30));
  text_layer_set_text_color(s_date_layer, GColorWhite);
  text_layer_set_background_color(s_date_layer, GColorClear);
  text_layer_set_text_alignment(s_date_layer, GTextAlignmentCenter);
  text_layer_set_text(s_date_layer, "Jul 26");
  text_layer_set_font(s_date_layer, s_date_font);
  layer_add_child(window_get_root_layer(window), text_layer_get_layer(s_date_layer));


   // Initialize the display
  update_time();






}

static void main_window_unload(Window *window) {
  bitmap_layer_destroy(s_bitmap_layer);
  fonts_unload_custom_font(s_time_font);
  fonts_unload_custom_font(s_date_font);
  text_layer_destroy(s_time_layer);
  text_layer_destroy(s_date_layer);

}

static void init() {
  s_main_window = window_create();
  window_set_background_color(s_main_window, GColorBlack);
#if defined(PBL_SDK_2)
  window_set_fullscreen(s_main_window, true);
#endif
  window_set_window_handlers(s_main_window, (WindowHandlers) {
    .load = main_window_load,
    .unload = main_window_unload,
  });
  window_stack_push(s_main_window, true);
  // Register with Event Services
  tick_timer_service_subscribe(MINUTE_UNIT, tick_handler);

}

static void deinit() {
  window_destroy(s_main_window);
}

int main() {
  init();
  app_event_loop();
  deinit();
}