1 files changed, 92 insertions, 0 deletions
diff --git a/movement/widgets/clock/simple_clock_widget.c b/movement/widgets/clock/simple_clock_widget.c
new file mode 100644
index 00000000..22218860
--- /dev/null
+++ b/movement/widgets/clock/simple_clock_widget.c
@@ -0,0 +1,92 @@
+#include <stdlib.h>
+#include "simple_clock_widget.h"
+#include "watch.h"
+
+void simple_clock_widget_setup(LauncherSettings *settings, void ** context_ptr) {
+    (void) settings;
+    // the only context we need is the timestamp of the previous tick.
+    if (*context_ptr == NULL) *context_ptr = malloc(sizeof(uint32_t));
+}
+
+void simple_clock_widget_activate(LauncherSettings *settings, void *context) {
+    if (settings->bit.clock_mode_24h) {
+        watch_set_indicator(WATCH_INDICATOR_24H);
+    }
+    watch_set_colon();
+    // this ensures that none of the timestamp fields will match, so we can re-render them all.
+    *((uint32_t *)context) = 0xFFFFFFFF;
+}
+
+bool simple_clock_widget_loop(LauncherEvent event, LauncherSettings *settings, void *context) {
+    printf("simple_clock_widget_loop\n");
+    const char weekdays[7][3] = {"SA", "SU", "MO", "TU", "WE", "TH", "FR"};
+    char buf[11];
+    uint8_t pos;
+
+    watch_date_time date_time;
+    uint32_t previous_date_time;
+    switch (event.event_type) {
+        case EVENT_ACTIVATE:
+        case EVENT_TICK:
+        case EVENT_SCREENSAVER:
+            date_time = watch_rtc_get_date_time();
+            previous_date_time = *((uint32_t *)context);
+            *((uint32_t *)context) = date_time.reg;
+
+            if (date_time.reg >> 6 == previous_date_time >> 6 && event.event_type != EVENT_SCREENSAVER) {
+                // everything before seconds is the same, don't waste cycles setting those segments.
+                pos = 8;
+                sprintf(buf, "%02d", date_time.unit.second);
+            } else if (date_time.reg >> 12 == previous_date_time >> 12 && event.event_type != EVENT_SCREENSAVER) {
+                // everything before minutes is the same.
+                pos = 6;
+                sprintf(buf, "%02d%02d", date_time.unit.minute, date_time.unit.second);
+            } else {
+                // other stuff changed; let's do it all.
+                if (!settings->bit.clock_mode_24h) {
+                    // if we are in 12 hour mode, do some cleanup.
+                    if (date_time.unit.hour < 12) {
+                        watch_clear_indicator(WATCH_INDICATOR_PM);
+                    } else {
+                        watch_set_indicator(WATCH_INDICATOR_PM);
+                    }
+                    date_time.unit.hour %= 12;
+                    if (date_time.unit.hour == 0) date_time.unit.hour = 12;
+                }
+                pos = 0;
+                if (event.event_type == EVENT_SCREENSAVER) {
+                    sprintf(buf, "%s%2d%2d%02d  ", weekdays[simple_clock_widget_get_weekday(date_time.unit.year, date_time.unit.month, date_time.unit.day)], date_time.unit.day, date_time.unit.hour, date_time.unit.minute);
+                } else {
+                    sprintf(buf, "%s%2d%2d%02d%02d", weekdays[simple_clock_widget_get_weekday(date_time.unit.year, date_time.unit.month, date_time.unit.day)], date_time.unit.day, date_time.unit.hour, date_time.unit.minute, date_time.unit.second);
+                }
+            }
+            watch_display_string(buf, pos);
+            break;
+        case EVENT_MODE_BUTTON_UP:
+            movement_move_to_next_widget();
+            return false;
+        case EVENT_LIGHT_BUTTON_UP:
+            movement_illuminate_led();
+            break;
+        case EVENT_ALARM_BUTTON_UP:
+            break;
+        default:
+            break;
+    }
+
+    return true;
+}
+
+void simple_clock_widget_resign(LauncherSettings *settings, void *context) {
+    (void) settings;
+    (void) context;
+}
+
+uint8_t simple_clock_widget_get_weekday(uint16_t year, uint16_t month, uint16_t day) {
+    year += 20;
+    if (month <= 2) {
+        month += 12;
+        year--;
+    }
+    return (day + 13 * (month + 1) / 5 + year + year / 4 + 525) % 7;
+}