Add detection of short and long press on buttons

maths-attacks.p8

@@ -3,37 +3,65 @@ version 37
 __lua__
 -- maths attacks --
 -- by djib --
-btn_stat = false
-btnp_stat = false
-held_stat = false
-switch = false
-
 function _init()
+	init_btn_status()
 end
 
 function _update()
-	btn_stat = false
+	update_btn_status(❎)
-	if btn(➡️) then
+	update_btn_status(🅾️)
-		btn_stat = true
-	end
-	btnp_stat = false
-	if btnp(➡️) then
-		btnp_stat = true
-	end
-	if btnp(➡️) and btn(➡️) then
-	 if switch then
-			held_stat = true
-		else
-			switch=true
-		end
-	else
-		held_stat = false
-	end
-		
 end
 
 function _draw()
- print(tostr(btn_stat) .. "-" .. tostr(btnp_stat) .. "-" tostr(held_stat))
+	cls()
+ print("❎ - pressed:"..tostr(btn_pressed(❎)).." - held:"..tostr(btn_held(❎)),1,1)
+ print("🅾️ - pressed:"..tostr(btn_pressed(🅾️)).." - held:"..tostr(btn_held(🅾️)),1,10)
+end
+-->8
+-- buttons --
+
+function init_btn_status()
+ -- no repeating delay for keyboard
+	poke(0x5f5d,255)
+ -- true when pressed 
+ btn_down_status={}
+ -- true when quickly released
+	btn_up_status={}
+	-- true when held
+ btn_held_status={}
+end
+
+function update_btn_status(button)
+ -- button was already pressed --
+ if btn_down_status[button] then
+  -- button was held
+ 	if btnp(button) then
+ 		btn_held_status[button]=true
+ 		btn_down_status[button]=false
+ 	end
+ 	-- button no longer pressed
+ 	if not btn(button) then
+ 		btn_up_status[button]=true
+ 		btn_down_status[button]=false
+ 	end
+ else
+ 	if btnp(button) then
+ 	 btn_down_status[button]=true
+ 	end
+ 	if not btn(button) then
+ 	 btn_held_status[button]=false
+ 	 btn_down_status[button]=false
+ 	 btn_up_status[button]=false
+ 	end
+ end
+end
+
+function btn_held(button)
+ return btn_held_status[button]
+end
+
+function btn_pressed(button)
+	return btn_up_status[button]
 end
 __gfx__
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