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TwatchChalice
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Be smarter about picking text color

This commit is contained in:
Neale Pickett 2016-05-10 17:27:41 -06:00
parent f5fd39044f
commit e5b1670958
2 changed files with 33 additions and 16 deletions
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2
appinfo.json
View File

@ -33,7 +33,7 @@
"chalk"
],
"uuid": "f00033b1-2e6c-490c-a650-99d9399b2163",
"versionLabel": "1.1",
"versionLabel": "1.2",
"watchapp": {
"watchface": true
}

47
src/main.c
View File

@ -11,6 +11,7 @@ static Window *window;
static Layer *s_bg_layer, *s_hands_layer;
static TextLayer *s_day_label, *s_bt_label;
static GColor accent_color;
static GColor text_color;
static char s_day_buffer[15];
@ -19,6 +20,20 @@ GPoint center;
bool bt_connected;
static GColor8 visible_against(GColor8 bg) {
uint8_t r = (bg.argb >> 4) & 0b11;
uint8_t g = (bg.argb >> 2) & 0b11;
uint8_t b = (bg.argb >> 0) & 0b11;
uint16_t a = (299*r + 587*g + 114*b);
// Counting the perceptive luminance - human eye favors green color...
if (a < 1500) {
return GColorWhite;
} else {
return GColorBlack;
}
}
static GPoint point_of_polar(int32_t theta, int r) {
GPoint ret = {
.x = (int16_t)(sin_lookup(theta) * r / TRIG_MAX_RATIO) + center.x,
@ -124,10 +139,10 @@ static void window_load(Window *window) {
s_day_label = text_layer_create(GRect(88, -3, 50, 16));
text_layer_set_text_alignment(s_day_label, GTextAlignmentRight);
#endif
text_layer_set_font(s_day_label, fonts_get_system_font(FONT_KEY_GOTHIC_14));
text_layer_set_font(s_day_label, fonts_get_system_font(FONT_KEY_GOTHIC_14_BOLD));
text_layer_set_text(s_day_label, s_day_buffer);
text_layer_set_background_color(s_day_label, GColorClear);
text_layer_set_text_color(s_day_label, GColorBlack);
text_layer_set_text_color(s_day_label, text_color);
layer_add_child(s_hands_layer, text_layer_get_layer(s_day_label));
// Missing phone
@ -164,6 +179,21 @@ static void tick_subscribe() {
}
static void init() {
// Pick out a color
#ifdef PBL_COLOR
uint32_t argb = 0;
while (argb == 0) {
argb = rand() % 0b00111111;
}
accent_color = (GColor8){ .argb = argb + 0b11000000 };
text_color = visible_against(accent_color);
#else
accent_color = GColorWhite;
text_color = GColorBlack;
#endif
s_day_buffer[0] = '\0';
window = window_create();
window_set_window_handlers(window, (WindowHandlers) {
.load = window_load,
@ -171,19 +201,6 @@ static void init() {
});
window_stack_push(window, true);
s_day_buffer[0] = '\0';
// Pick out a color
#ifdef PBL_COLOR
uint32_t argb = 0;
while ((argb == 0) || (argb == 0x000001)) {
argb = rand() % 0b00111111;
}
accent_color = (GColor8){ .argb = argb + 0b11000000 };
#else
accent_color = GColorWhite;
#endif
Layer *window_layer = window_get_root_layer(window);
display_bounds = layer_get_bounds(window_layer);
center = grect_center_point(&display_bounds);