From fddb0c8c0bb5bfc5719a7efe8161adab315d3f84 Mon Sep 17 00:00:00 2001
From: Lukas Krickl <lukas@krickl.dev>
Date: Sat, 30 Aug 2025 08:44:45 +0200
Subject: [PATCH] select menu: added stub for select menu

---
 src/action_menu.s | 26 ++++++++++++++++++++++++++
 src/main.s        |  2 ++
 src/select_menu.s | 13 +++++++++++++
 src/unit.s        |  8 ++++++++
 src/update.s      |  3 +++
 5 files changed, 52 insertions(+)
 create mode 100644 src/action_menu.s
 create mode 100644 src/select_menu.s

diff --git a/src/action_menu.s b/src/action_menu.s
new file mode 100644
index 0000000..4340b34
--- /dev/null
+++ b/src/action_menu.s
@@ -0,0 +1,26 @@
+	; game state for action menu selector
+	; the action menu allows the player to select
+	; any action the character can perform
+	; it also allows binding an action to the B button
+	; by pressing select
+	; inputs:
+	;		de: state
+	;	returns:
+	;		bc: next state
+update_action_menu:
+	ldnull bc
+	ret
+	
+	; transitions from the current state
+	; to action menu
+action_menu_init:
+	ld hl, game_mode
+	ld de, st_next
+	add hl, de
+	; write st_update_action_menu to st_next
+	ld a, st_update_action_menu LO
+	ld [hl+], a
+	ld a, st_update_action_menu HI
+	ld [hl], a
+
+	ret
diff --git a/src/main.s b/src/main.s
index fd06531..1b45af6 100644
--- a/src/main.s
+++ b/src/main.s
@@ -79,6 +79,8 @@ main:
 #include "objanim.s"
 #include "battle.s"
 #include "action.s"
+#include "action_menu.s"
+#include "select_menu.s"
 
 ; fill bank
 .fill 0xFF, 0x4000 - $
diff --git a/src/select_menu.s b/src/select_menu.s
new file mode 100644
index 0000000..8ce9184
--- /dev/null
+++ b/src/select_menu.s
@@ -0,0 +1,13 @@
+	; a select menu is any menu that allows the player to select
+	; a range of values
+	; writes current string to status line and requests an update
+	; if the direction keys are pressed
+	; inputs:
+	;		hl: string ptr table
+	;		 b: table length
+	;		 a: current slection value
+	;	returns:
+	;		a: selection value
+	;		b: button pressed
+select_menu_update:
+	ret
diff --git a/src/unit.s b/src/unit.s
index d1fb5f7..1561458 100644
--- a/src/unit.s
+++ b/src/unit.s
@@ -302,6 +302,14 @@ unit_handle_inputs:
 		call unit_handle_assigned_action 
 		push bc ; bc = next state
 @nota:
+
+	ld b, BTNSELECT
+	input_just
+	jr z, @notselect REL
+		pop bc
+		call action_menu_init
+		push bc ; bc = next state
+@notselect:
   
   ld b, BTNUP
   input_held 
diff --git a/src/update.s b/src/update.s
index 37e862f..7b4e66e 100644
--- a/src/update.s
+++ b/src/update.s
@@ -107,3 +107,6 @@ st_update_pause:
   st_def 0x00, update_pause, st_update_pause
 st_update_game_over:
   st_def 0x00, update_game_over, st_update_game_over
+
+st_update_action_menu:
+	st_def 0x00, update_action_menu, st_update_action_menu
-- 
2.30.2