Add low fuel indicator

src/c/main.c

@@ -41,6 +41,7 @@ static GBitmap *s_f_icon;
 
 // tracking statics
 static bool s_pkjs_ready = false;
+static bool s_low_fuel_indicator = false;
 static int s_batt_level;
 static uint8_t s_temp_level;
 
@@ -50,9 +51,15 @@ static const uint8_t s_bar_width = 17;
 static const uint8_t s_bar_spacing = s_bar_height + 1;
 
 static void batt_callback(BatteryChargeState state) {
-	s_batt_level = state.charge_percent;
+	s_batt_level = state.charge_percent / 5;
 	layer_mark_dirty(s_fuel_layer);
-	layer_mark_dirty(s_temp_layer); // TODO temporary!!
+	if (!s_low_fuel_indicator && s_batt_level < 5) {
+		replace_gbitmap_color(s_applied_fg, GColorChromeYellow, s_e_icon, s_e_layer);
+		s_low_fuel_indicator = true;
+	} else if (s_low_fuel_indicator && s_batt_level > 4) {
+		replace_gbitmap_color(GColorChromeYellow, s_applied_fg, s_e_icon, s_e_layer);
+		s_low_fuel_indicator = false;
+	}
 }
 
 // TODO use temperature (for now it updates with battery usage)
@@ -69,10 +76,9 @@ static void temp_update_proc(Layer *layer, GContext *ctx) {
 
 static void fuel_update_proc(Layer *layer, GContext *ctx) {
 	graphics_context_set_fill_color(ctx, GColorWhite);
-	const uint8_t bar_count = s_batt_level / 5;
 	uint16_t bar_bottom_pos = 195;
 
-	for (uint8_t i = 0; i < bar_count; ++i) {
+	for (uint8_t i = 0; i < s_batt_level; ++i) {
 		graphics_fill_rect(ctx, GRect(0, bar_bottom_pos, s_bar_width, s_bar_height), 0, GCornerNone);
 		bar_bottom_pos -= s_bar_spacing;
 	}

src/c/palette_manip.c

@@ -2,8 +2,6 @@
 
 #include "palette_manip.h"
 
-#ifdef PBL_COLOR
-
 int get_num_palette_colors(GBitmap *b){
 	GBitmapFormat format = gbitmap_get_format(b);
 	switch (format) {
@@ -35,7 +33,4 @@ void replace_gbitmap_color(GColor color_to_replace, GColor replace_with_color, G
 	if(bml != NULL){
 		layer_mark_dirty(bitmap_layer_get_layer(bml));
 	}
-
-}
-
-#endif
+}