Add simple_coin_flip_face.

movement/make/Makefile

@@ -118,6 +118,7 @@ SRCS += \
   ../watch_faces/complication/flashlight_face.c \
   ../watch_faces/clock/decimal_time_face.c \
   ../watch_faces/clock/wyoscan_face.c \
+  ../watch_faces/complication/simple_coin_flip_face.c \
 # New watch faces go above this line.
 
 # Leave this line at the bottom of the file; it has all the targets for making your project.

movement/movement_faces.h

@@ -95,6 +95,7 @@
 #include "flashlight_face.h"
 #include "decimal_time_face.h"
 #include "wyoscan_face.h"
+#include "simple_coin_flip_face.h"
 // New includes go above this line.
 
 #endif // MOVEMENT_FACES_H_

movement/watch_faces/complication/simple_coin_flip_face.c

@@ -0,0 +1,139 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2023 Wesley Aptekar-Cassels
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#if __EMSCRIPTEN__
+#include <time.h>
+#else
+#include "saml22j18a.h"
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+#include "simple_coin_flip_face.h"
+
+#define SIMPLE_COIN_FLIP_REQUIRE_LONG_PRESS_FOR_REFLIP true
+
+void simple_coin_flip_face_setup(movement_settings_t *settings, uint8_t watch_face_index, void ** context_ptr) {
+    (void) settings;
+    (void) watch_face_index;
+    if (*context_ptr == NULL) {
+        *context_ptr = malloc(sizeof(simple_coin_flip_state_t));
+        memset(*context_ptr, 0, sizeof(simple_coin_flip_state_t));
+    }
+}
+
+void simple_coin_flip_face_activate(movement_settings_t *settings, void *context) {
+    (void) settings;
+    (void) context;
+}
+
+static uint32_t get_random(uint32_t max) {
+    #if __EMSCRIPTEN__
+    return rand() % max;
+    #else
+    return arc4random_uniform(max);
+    #endif
+}
+
+static void animation_0() {
+    watch_display_string("  ", 8);
+    watch_set_pixel(0, 3);
+    watch_set_pixel(0, 6);
+}
+
+static void animation_1() {
+    watch_display_string("  ", 8);
+    watch_set_pixel(1, 3);
+    watch_set_pixel(1, 5);
+}
+
+static void animation_2() {
+    watch_display_string("  ", 8);
+    watch_set_pixel(2, 2);
+    watch_set_pixel(2, 4);
+}
+
+bool simple_coin_flip_face_loop(movement_event_t event, movement_settings_t *settings, void *context) {
+    simple_coin_flip_state_t *state = (simple_coin_flip_state_t *)context;
+
+    switch (event.event_type) {
+        case EVENT_ACTIVATE:
+            watch_display_string("flip", 5);
+            state->animation_frame = 0;
+            break;
+        case EVENT_TICK:
+            switch (state->animation_frame) {
+                case 0:
+                case 7:
+                    return true;
+                case 1:
+                    movement_request_tick_frequency(8);
+                    watch_display_string("      ", 4);
+                    // fallthrough
+                case 5:
+                    animation_0();
+                    break;
+                case 2:
+                case 4:
+                    animation_1();
+                    break;
+                case 3:
+                    animation_2();
+                    break;
+                case 6:
+                    movement_request_tick_frequency(1);
+                    if (get_random(2)) {
+                        watch_display_string("Heads ", 4);
+                    } else {
+                        watch_display_string(" Tails", 4);
+                    }
+                    break;
+            }
+            state->animation_frame++;
+            break;
+        case EVENT_LIGHT_BUTTON_UP:
+        case EVENT_ALARM_BUTTON_UP:
+            if (!SIMPLE_COIN_FLIP_REQUIRE_LONG_PRESS_FOR_REFLIP || state->animation_frame == 0) {
+                state->animation_frame = 1;
+            }
+            break;
+        case EVENT_ALARM_LONG_PRESS:
+        case EVENT_LIGHT_LONG_PRESS:
+            state->animation_frame = 1;
+            break;
+        case EVENT_TIMEOUT:
+            movement_move_to_face(0);
+            break;
+        default:
+            return movement_default_loop_handler(event, settings);
+    }
+
+    return true;
+}
+
+void simple_coin_flip_face_resign(movement_settings_t *settings, void *context) {
+    (void) settings;
+    (void) context;
+}
+

movement/watch_faces/complication/simple_coin_flip_face.h

@@ -0,0 +1,62 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2023 Wesley Aptekar-Cassels
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef SIMPLE_COIN_FLIP_FACE_H_
+#define SIMPLE_COIN_FLIP_FACE_H_
+
+#include "movement.h"
+
+/*
+ * A extremely simple coin flip face.
+ *
+ * Press ALARM or LIGHT to flip a coin, after a short animation it will display
+ * "Heads" or "Tails". Long-press to flip again (you can change a #define to
+ * allow a short-press to reflip as well, if you'd like).
+ *
+ * This is for people who want a simpler UI than probability_face or
+ * randonaut_face. While those have more features, this one is more immediately
+ * obvious - useful, for instance, if you are using a coin flip to agree on
+ * something with someone, and want the operation to be clear to someone who
+ * has not had anything explained to them.
+ */
+
+typedef struct {
+    uint8_t animation_frame;
+} simple_coin_flip_state_t;
+
+void simple_coin_flip_face_setup(movement_settings_t *settings, uint8_t watch_face_index, void ** context_ptr);
+void simple_coin_flip_face_activate(movement_settings_t *settings, void *context);
+bool simple_coin_flip_face_loop(movement_event_t event, movement_settings_t *settings, void *context);
+void simple_coin_flip_face_resign(movement_settings_t *settings, void *context);
+
+#define simple_coin_flip_face ((const watch_face_t){ \
+    simple_coin_flip_face_setup, \
+    simple_coin_flip_face_activate, \
+    simple_coin_flip_face_loop, \
+    simple_coin_flip_face_resign, \
+    NULL, \
+})
+
+#endif // SIMPLE_COIN_FLIP_FACE_H_
+