From: Lukas Krickl <lukas@krickl.dev>
Date: Sun, 31 Aug 2025 15:15:10 +0000 (+0200)
Subject: select menu: the menu now renders an arrow to indicate available options
X-Git-Url: https://git.krickl.dev/?a=commitdiff_plain;h=e78378a1212dd0384b436ac0cb96903b4361ea33;p=gbrg%2F.git

select menu: the menu now renders an arrow to indicate available options
---

diff --git a/src/mainmenu.s b/src/mainmenu.s
index 14c1e53..43da733 100644
--- a/src/mainmenu.s
+++ b/src/mainmenu.s
@@ -1,6 +1,7 @@
 #define MAIN_MENU_FILE_1_OFFSET 128+2
 
 #define MENU_CURSOR_TILE 0xF5 
+#define MENU_CURSOR_TILE_REVERSE 0xF5+3 
 
 
   ; location table for cursor
diff --git a/src/select_menu.s b/src/select_menu.s
index b648daf..06ccfc2 100644
--- a/src/select_menu.s
+++ b/src/select_menu.s
@@ -45,6 +45,7 @@ select_menu_update:
 @notleft:
 	
 	pop bc ; get back table length	
+	ld c, b ; store table length in c
 	pop af
 	push af
 	dec b ; length - 1
@@ -58,6 +59,7 @@ select_menu_update:
 		ld [select_menu_delay], a
 		pop af
 		inc a
+		ld b, c ; table length = c
 		call select_menu_draw_status
 		ld b, BTNRIGHT
 		ret
@@ -83,17 +85,31 @@ select_menu_update:
 	;	inputs:
 	;		hl: string ptr table
 	;		 a: selection
+	;		 b: string table length 
 	; preserves:
 	;		af
 select_menu_draw_status:
 	push af
+	push bc
 
 	push hl
 	push af
 	call ui_clear_status_line 
+
 	pop af
-	pop hl
+	push af
+	; check if left arrow needs to be drawn (a != 0)
+	cp a, 0
+	jr z, @no_left_arrow REL
+		; write cursor tile
+		ld de, UI_STATUS_LINE
+		ld a, MENU_CURSOR_TILE_REVERSE
+		ld [de], a
+@no_left_arrow:
 
+	pop af
+	pop hl
+	
 	add a, a ; * 2 for table offset
 	ld d, 0
 	ld e, a
@@ -106,9 +122,24 @@ select_menu_draw_status:
 	ld h, a
 	ld l, d
 
-	ld de, UI_STATUS_LINE
+	ld de, UI_STATUS_LINE+1
 	call puts
+	push de
 	call ui_request_redraw
+	pop de
+	; de = tile after string
 	
+	pop bc
+	pop af
+
+	push af
+	; check if right arrow needs to be drawn (a != b-1)
+	dec b
+	cp a, b
+	jr z, @no_right_arrow REL
+		; write cursor tile
+		ld a, MENU_CURSOR_TILE
+		ld [de], a
+@no_right_arrow:
 	pop af
 	ret
diff --git a/src/strings.s b/src/strings.s
index d3b6f65..0b4bc2c 100644
--- a/src/strings.s
+++ b/src/strings.s
@@ -84,6 +84,8 @@ STR_SLASH:
   ; inputs:
   ;   hl: the string
   ;   de: tile location
+	;	returns:
+	;		de: new tile location after string
 puts:
   ld a, [hl+]
   cp a, 0
diff --git a/tiles/bank8C00.inc b/tiles/bank8C00.inc
index 1f7bd6a..ace42e1 100644
--- a/tiles/bank8C00.inc
+++ b/tiles/bank8C00.inc
@@ -503,14 +503,14 @@
 .chr 22332222
 .chr 22332222
 ; tile 56
-.chr 00000000
-.chr 00000000
-.chr 00000000
-.chr 00000000
-.chr 00000000
-.chr 00000000
-.chr 00000000
-.chr 00000000
+.chr 22223322
+.chr 22233322
+.chr 22333322
+.chr 23333322
+.chr 23333322
+.chr 22333322
+.chr 22233322
+.chr 22223322
 ; tile 57
 .chr 00000000
 .chr 00000000