Flash an X instead of a status window when the user inputs the wrong answer

src/c/main.c

@@ -25,6 +25,8 @@ static BitmapLayer *s_check_bmp_layer;
 static TextLayer *s_setter_txt_layer;
 static Layer *s_setter_highlight_layer;
 //// alarm
+static BitmapLayer *s_x_bmp_layer;
+static Animation *s_x_anim_master;
 static Layer *s_graph_layer;
 static TextLayer *s_theta_txt_layer;
 static TextLayer *s_parenthesis_txt_layer;
@@ -54,6 +56,8 @@ GFont s_font_mansalva_small;
 //// setter
 static GBitmap *s_clock_bmp;
 static GBitmap *s_check_bmp;
+//// alarm
+static GBitmap *s_x_bmp;
 
 // global vars
 static WakeupReason s_alarm_reason;
@@ -129,10 +133,6 @@ static void status_set_failure_click_config_provider(void *ctx) {
 	window_single_click_subscribe(BUTTON_ID_DOWN, click_handler_push_setter);
 }
 
-static void status_math_failure_click_config_provider(void *ctx) {
-	window_single_click_subscribe(BUTTON_ID_SELECT, click_handler_retry);
-}
-
 static void status_window_load(StatusWindowPurpose purpose) {
 	Layer *window_layer = window_get_root_layer(s_status_window);
 	s_status_txt_layer = text_layer_create(GRect(0, 0, PBL_DISPLAY_WIDTH, PBL_DISPLAY_HEIGHT));
@@ -149,10 +149,6 @@ static void status_window_load(StatusWindowPurpose purpose) {
 	case STATUS_SET_FAILURE:
 		text_layer_set_text(s_status_txt_layer, "Failed to set an alarm.\nPress any button to return to alarm setter.");
 		window_set_click_config_provider(s_status_window, status_set_failure_click_config_provider);
-		break;
-	case STATUS_MATH_FAILURE:
-		text_layer_set_text(s_status_txt_layer, "Incorrect equation.\nTry again!");
-		window_set_click_config_provider(s_status_window, status_math_failure_click_config_provider);
 	}
 	text_layer_set_background_color(s_status_txt_layer, GColorClear);
 	layer_set_frame(text_layer_get_layer(s_status_txt_layer), GRect(0, (PBL_DISPLAY_HEIGHT / 2) - (text_layer_get_content_size(s_status_txt_layer).h / 2), PBL_DISPLAY_WIDTH, PBL_DISPLAY_HEIGHT));
@@ -542,7 +538,7 @@ static void accel_tap_handler(AccelAxisType axis, int32_t direction) {
 	// check solution
 	for (int i = 0; i < 3; ++i) {
 		if (s_selected_indices[i] != s_solution_indices[i]) {
-			push_status_window(STATUS_MATH_FAILURE);
+			animation_schedule(animation_clone(s_x_anim_master));
 			return;
 		}
 	}
@@ -634,6 +630,16 @@ static void live_wakeup_handler_for_alarm(WakeupId id, int32_t wakeup_reason) {
 	}
 }
 
+static void anim_handler_flash_x_start(Animation *animation, void *context) {
+	layer_set_hidden(bitmap_layer_get_layer(s_x_bmp_layer), false);
+}
+static void anim_handler_flash_x_end(Animation *animation, bool finished, void *context) {
+	layer_set_hidden(bitmap_layer_get_layer(s_x_bmp_layer), true);
+	animation_destroy(animation);
+}
+static void anim_update_flash_x(Animation *animation, const AnimationProgress progress) {} // dummy
+static const AnimationImplementation s_x_anim_impl = {.update = anim_update_flash_x};
+
 static void alarm_window_load() {
 	wakeup_service_subscribe(live_wakeup_handler_for_alarm);
 
@@ -761,6 +767,20 @@ static void alarm_window_load() {
 	text_layer_set_font(s_progress_txt_layer, s_font_lecoish_small);
 	layer_add_child(window_layer, text_layer_get_layer(s_progress_txt_layer));
 
+	// x (incorrect equation icon)
+	s_x_bmp = gbitmap_create_with_resource(RESOURCE_ID_X);
+	s_x_bmp_layer = bitmap_layer_create(GRect(20, 24, 160, 179));
+	bitmap_layer_set_bitmap(s_x_bmp_layer, s_x_bmp);
+	bitmap_layer_set_compositing_mode(s_x_bmp_layer, GCompOpSet);
+	layer_set_hidden(bitmap_layer_get_layer(s_x_bmp_layer), true); // hide until needed
+	layer_add_child(window_layer, bitmap_layer_get_layer(s_x_bmp_layer));
+
+	// x flash animation init
+	s_x_anim_master = animation_create();
+	animation_set_implementation(s_x_anim_master, &s_x_anim_impl);
+	animation_set_duration(s_x_anim_master, 1500);
+	animation_set_handlers(s_x_anim_master, (AnimationHandlers){.started = anim_handler_flash_x_start, .stopped = anim_handler_flash_x_end}, NULL);
+
 	// configure UI around current triangle in s_triangle_layer
 	s_current_triangle_num = 1;
 	s_secs_since_last_input = MAX_SECS_WITHOUT_INPUT;
@@ -775,6 +795,10 @@ static void alarm_window_load() {
 static void alarm_window_unload() {
 	tick_timer_service_unsubscribe();
 	accel_tap_service_unsubscribe();
+	animation_destroy(s_x_anim_master);
+	gbitmap_destroy(s_x_bmp);
+	bitmap_layer_destroy(s_x_bmp_layer);
+	text_layer_destroy(s_progress_txt_layer);
 	text_layer_destroy(s_countdown_txt_layer);
 	window_destroy(s_drop_window);
 	text_layer_destroy(s_side_a_txt_layer);

src/c/main.h

@@ -3,8 +3,7 @@
 typedef enum
 {
     STATUS_CONFIRMATION = 1,
-    STATUS_SET_FAILURE = 2,
-    STATUS_MATH_FAILURE = 3
+    STATUS_SET_FAILURE = 2
 } StatusWindowPurpose;
 
 static void push_setter_window();