From 6145ad8ace06735bc50d5594abce9e4128117ebf Mon Sep 17 00:00:00 2001
From: rkcf <rkcf@rkcf.me>
Date: Sat, 4 Feb 2023 21:49:42 -0600
Subject: [PATCH] Feat: Add display of sequence steps to GUI

---
 main/esp32-sequencer.c | 30 ++++++++++++++++++++++++++----
 1 file changed, 26 insertions(+), 4 deletions(-)

diff --git a/main/esp32-sequencer.c b/main/esp32-sequencer.c
index 475ffca..7e4ec11 100644
--- a/main/esp32-sequencer.c
+++ b/main/esp32-sequencer.c
@@ -91,6 +91,7 @@ static uint16_t current_bpm = DEFAULT_BPM;
 #define SEQ_MAX_LEN 8
 static uint8_t sequence[SEQ_MAX_LEN] = {0};
 static uint8_t seq_len = SEQ_MAX_LEN;
+lv_obj_t * sequence_label = NULL;
 
 static const char *TAG = "sequencer";
 
@@ -103,10 +104,24 @@ uint32_t ms_to_bpm(uint32_t ms) {
   return 60000 / ms;
 }
 
+// updates the sequence for the GUI display
+static void update_seq(uint8_t *sequence) {
+  char seq_str[seq_len];
+  for (uint8_t i = 0; i < seq_len; i++) {
+    if (sequence[i] == 1) {
+      seq_str[i] = 'x';
+      } else {
+      seq_str[i] = 'o';
+    }
+  }
+  lv_label_set_text(sequence_label, seq_str);
+}
+
 static void randomize_seq(uint8_t *sequence) {
   for (uint8_t i = 0; i < SEQ_MAX_LEN; i++) {
     sequence[i] = esp_random() % 2;
   }
+  update_seq(sequence);
 }
 
 static void mutate_seq(uint8_t *sequence) {
@@ -118,6 +133,7 @@ static void mutate_seq(uint8_t *sequence) {
   } else if (sequence[step] == 0) {
     sequence[step] = 1;
   }
+  update_seq(sequence);
 }
 
 /* Handle tap tempo button presses */
@@ -393,9 +409,9 @@ static void display_init(void) {
 
 static void gui_create(void) {
   // Setup flex layout
-  lv_obj_t * seq_row = lv_obj_create(lv_scr_act());
-  lv_obj_set_size(seq_row, 300, 70);
-  lv_obj_set_flex_flow(seq_row, LV_FLEX_FLOW_ROW);
+  /* lv_obj_t * seq_row = lv_obj_create(lv_scr_act()); */
+  /* lv_obj_set_size(seq_row, 300, 70); */
+  /* lv_obj_set_flex_flow(seq_row, LV_FLEX_FLOW_ROW); */
 
   // Initialize style
   static lv_style_t gui_style;
@@ -416,9 +432,15 @@ static void gui_create(void) {
   lv_obj_t * title_label = lv_label_create(lv_scr_act());
   lv_label_set_text(title_label, "ESP32 Sequencer\n");
   lv_obj_add_style(title_label, &gui_style, LV_STATE_DEFAULT);
+  lv_obj_align(title_label, LV_ALIGN_TOP_MID, 0, 5);
+
+  // Create sequence text area
+  sequence_label = lv_label_create(lv_scr_act());
+  lv_label_set_text(sequence_label, "oooooooo");
+  lv_obj_add_style(sequence_label, &gui_style, LV_STATE_DEFAULT);
 
   // Align label to center top
-  /* lv_obj_align(title_label, LV_ALIGN_BOTTOM_RIGHT, 0, 0); */
+  lv_obj_align(sequence_label, LV_ALIGN_TOP_LEFT, 0, 30);
 }
 
 static void gui_task(void *pvParameter) {