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Pebble Tutorial Part 2 - 2
{
"uuid": "ed70b15c-3c48-4828-8e8c-e39a28efb38d",
"shortName": "Tutorial-2-2",
"longName": "Tutorial-2-2",
"companyName": "Pebble",
"versionCode": 1,
"versionLabel": "1.0",
"sdkVersion": 3,
"watchapp": {
"watchface": true
},
"appKeys": {},
"resources": {
"media": [
{
"type":"font",
"name":"FONT_PERFECT_DOS_48",
"file":"perfect-dos-vga.ttf",
"compatibility": "2.7"
},
{
"type":"bitmap",
"name":"IMAGE_BACKGROUND",
"file":"background.png"
}
]
}
}
#include <pebble.h>
static Window *s_main_window;
static TextLayer *s_time_layer;
static BitmapLayer *s_background_layer;
static GBitmap *s_background_bitmap;
static GFont s_time_font;
static void update_time() {
// Get a tm structure
time_t temp = time(NULL);
struct tm *tick_time = localtime(&temp);
// Write the current hours and minutes into a buffer
static char s_buffer[8];
strftime(s_buffer, sizeof(s_buffer), clock_is_24h_style() ?
"%H:%M" : "%I:%M", tick_time);
// Display this time on the TextLayer
text_layer_set_text(s_time_layer, s_buffer);
}
static void tick_handler(struct tm *tick_time, TimeUnits units_changed) {
update_time();
}
static void main_window_load(Window *window) {
// Get information about the Window
Layer *window_layer = window_get_root_layer(window);
GRect bounds = layer_get_bounds(window_layer);
// Create GBitmap
s_background_bitmap = gbitmap_create_with_resource(RESOURCE_ID_IMAGE_BACKGROUND);
// Create BitmapLayer to display the GBitmap
s_background_layer = bitmap_layer_create(bounds);
// Set the bitmap onto the layer and add to the window
bitmap_layer_set_bitmap(s_background_layer, s_background_bitmap);
layer_add_child(window_layer, bitmap_layer_get_layer(s_background_layer));
// Create the TextLayer with specific bounds
s_time_layer = text_layer_create(
GRect(0, PBL_IF_ROUND_ELSE(58, 52), bounds.size.w, 50));
// Improve the layout to be more like a watchface
text_layer_set_background_color(s_time_layer, GColorClear);
text_layer_set_text_color(s_time_layer, GColorBlack);
text_layer_set_text(s_time_layer, "00:00");
text_layer_set_text_alignment(s_time_layer, GTextAlignmentCenter);
// Create GFont
s_time_font = fonts_load_custom_font(resource_get_handle(RESOURCE_ID_FONT_PERFECT_DOS_48));
// Apply to TextLayer
text_layer_set_font(s_time_layer, s_time_font);
// Add it as a child layer to the Window's root layer
layer_add_child(window_layer, text_layer_get_layer(s_time_layer));
}
static void main_window_unload(Window *window) {
// Destroy TextLayer
text_layer_destroy(s_time_layer);
// Unload GFont
fonts_unload_custom_font(s_time_font);
// Destroy GBitmap
gbitmap_destroy(s_background_bitmap);
// Destroy BitmapLayer
bitmap_layer_destroy(s_background_layer);
}
static void init() {
// Create main Window element and assign to pointer
s_main_window = window_create();
// Set the background color
window_set_background_color(s_main_window, GColorBlack);
// Set handlers to manage the elements inside the Window
window_set_window_handlers(s_main_window, (WindowHandlers) {
.load = main_window_load,
.unload = main_window_unload
});
// Show the Window on the watch, with animated=true
window_stack_push(s_main_window, true);
// Make sure the time is displayed from the start
update_time();
// Register with TickTimerService
tick_timer_service_subscribe(MINUTE_UNIT, tick_handler);
}
static void deinit() {
// Destroy Window
window_destroy(s_main_window);
}
int main(void) {
init();
app_event_loop();
deinit();
}
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