Finished basic question box

src/conversation/questionbox.c

@@ -11,26 +11,77 @@ uint8_t QUESTION_BOX_OPTION_COUNT;
 uint8_t QUESTION_BOX_OPTION_CURRENT;
 
 void questionBoxSetOptions(char *title, char **options, uint8_t count) {
-  uint8_t i;
+  uint8_t i, j;
   char buffer[TEXTBOX_CHARS_MAX + 1];
+  char spaces[QUESTION_BOX_QUESTION_SPACES];
   sprintf(buffer, title);
 
   i = 0;
   QUESTION_BOX_OPTION_CURRENT = 0;
   QUESTION_BOX_OPTION_COUNT = count;
 
+  for(i = 0; i < QUESTION_BOX_QUESTION_SPACES; i++) {
+    spaces[i] = ' ';
+  }
+
   // For each row...
   for(i = 0; i < count; i++) {
     if((i & 1) == 0) {
+      j = strlen(options[i]);
       sprintf(buffer, "%s\n %s", buffer, options[i]);
     } else {
-      sprintf(buffer, "%s %s", buffer, options[i]);
+      j = QUESTION_BOX_QUESTION_SPACES - j;
+      spaces[j + 1] = '\0';
+      sprintf(buffer, "%s%s%s", buffer, spaces, options[i]);
+      spaces[j + 1] = ' ';
     }
   }
 
   conversationTextboxSetText(buffer);
+
+  // Modify the textbox state
+  TEXTBOX_STATE |= TEXTBOX_STATE_IS_QUESTION;
+
+  // Repurpose old array and draw arrow
+  spaces[0] = QUESTION_BOX_CURSOR - TEXTBOX_FONT_START + FONT_DATA_POSITION;
+  set_bkg_tiles(0x01, TEXTBOX_WIN_Y + 0x02, 1, 1, spaces);
 }
 
 inline void questionBoxUpdate() {
-  
+  uint8_t tiles[1];
+  uint8_t i;
+
+  if((TEXTBOX_STATE & (TEXTBOX_STATE_VISIBLE|TEXTBOX_STATE_IS_QUESTION)) == 0) return;
+
+  // Detect input
+  if(INPUT_PRESSED & J_RIGHT) {
+    QUESTION_BOX_OPTION_CURRENT++;
+  } else if(INPUT_PRESSED & J_LEFT) {
+    QUESTION_BOX_OPTION_CURRENT--;
+  } else if(INPUT_PRESSED & J_UP) {
+    QUESTION_BOX_OPTION_CURRENT -= 2;
+  } else if(INPUT_PRESSED & J_DOWN) {
+    QUESTION_BOX_OPTION_CURRENT += 2;
+  } else {
+    return;
+  }
+
+  // Bound.
+  QUESTION_BOX_OPTION_CURRENT = QUESTION_BOX_OPTION_CURRENT % QUESTION_BOX_OPTION_COUNT;
+
+  // Decide where to render arrow
+  for(i = 0; i < QUESTION_BOX_OPTION_COUNT; i++) {
+    if(i == QUESTION_BOX_OPTION_CURRENT) {
+      tiles[0] = QUESTION_BOX_CURSOR - TEXTBOX_FONT_START + FONT_DATA_POSITION;
+    } else {
+      tiles[0] = ' ' - TEXTBOX_FONT_START + FONT_DATA_POSITION;
+    }
+    set_bkg_tiles(
+      0x01 + ((i % 0x02) * QUESTION_BOX_QUESTION_SPACES),
+      TEXTBOX_WIN_Y + 0x02 + (i / 0x02),
+      1, 1,
+      tiles
+    );
+  }
+
 }