Refactor input code

maths-attacks.p8

@@ -4,7 +4,7 @@ __lua__
 -- maths attacks --
 -- by djib --
 function _init()
-	cls()
+	cls(1)
 	init_btn_status()
 end
 
@@ -14,12 +14,10 @@ function _update()
 end
 
 function _draw()
-	cls()
-	rect(0,0,127,127,1)
 	draw_keypad()	
 	result=get_input()
 	if result!="" then
-		print(get_input())
+		print(get_input(),0)
 	end
 end
 -->8
@@ -72,56 +70,9 @@ function btn_pressed(button)
 	return btn_up_status[button]
 end
 -->8
--- game logic --
-
-function get_input()
-	result=""
-	if btn_pressed(❎) then
-		if btn(⬆️) then
-			if btn(⬅️) then
-				result = "1"
-			elseif btn(➡️) then
-				result = "3"
-			else
-				result = "2"
-			end
-		elseif btn(⬇️) then
-			if btn(⬅️) then
-				result = "7"
-			elseif btn(➡️) then
-				result = "9"
-			else
-				result = "8"
-			end
-		else
-			if btn(⬅️) then
-				result = "4"
-			elseif btn(➡️) then
-				result = "6"
-			else
-				result = "5"
-			end
-		end
-	elseif btn_held(❎) then
-		result = "clear!"
-	elseif btn_pressed(🅾️) then
-		result = "0"
-	elseif btn_held(🅾️) then
-		result = "fire!"
-	end
-	return result
-end
--->8
 -- keypad input --
 
-function draw_keypad()
- -- size of keys
- local delta=8
- -- keypad location
-	local kx=(127-delta*3)/2
-	local ky=127-delta*3 
-
-	local keys = {
+keys = {
 	{ --1
  	dx=0,dy=0,
  	up=true,down=false,
@@ -167,12 +118,43 @@ function draw_keypad()
  	up=false,down=true,
  	left=false,right=true
  }
-	}
+}
+
+function get_input()
+	result=""
+	if btn_pressed(❎) then
 		for k,v in pairs(keys) do
-		if btn(⬆️)==v.up and
+			if input_matches(v) then
+				result=tostr(k)
+			end
+		end
+	elseif btn_held(❎) then
+		result = "fire!"
+	elseif btn_pressed(🅾️) then
+		result = "0"
+	elseif btn_held(🅾️) then
+		result = "clear!"
+	end
+	return result
+end
+
+function input_matches(v)
+	return btn(⬆️)==v.up and
 								btn(⬇️)==v.down and
 								btn(⬅️)==v.left and
-					btn(➡️)==v.right then
+								btn(➡️)==v.right
+end
+
+function draw_keypad()
+ -- size of keys
+ local delta=8
+ -- keypad location
+	local kx=(127-delta*3)/2
+	local ky=127-delta*3
+	rectfill(kx-1,ky-1,kx+3*delta,ky+3*delta,0)
+
+	for k,v in pairs(keys) do
+		if input_matches(v) then
 			offset=16
 		else
 			offset=0
@@ -183,20 +165,22 @@ function draw_keypad()
 		)
 	end
 end
+-->8
+
 __gfx__
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