Add key rebinding

README

@@ -10,3 +10,4 @@ Movement:
 
 r - restart
 q - quit
+c - configure keybindings

bundle/main.lua

@@ -18,9 +18,12 @@ local last_key_pressed = nil
 local last_direction_moved = nil
 local move_repeat_counter = nil
 
-local gamemodes = {normal = 0, won = 1}
+local gamemodes = {normal = 0, won = 1, config = 2}
 local game_mode = gamemodes.normal
 
+local configuration_steps = {quit = -3, restart = -2, configure = -1}
+local configuration_step = nil
+
 local direction_keys = {}
 direction_keys['i'] = directions.up
 direction_keys['u'] = directions.upleft
@@ -30,7 +33,7 @@ direction_keys['k'] = directions.down
 direction_keys['.'] = directions.downright
 direction_keys['l'] = directions.right
 direction_keys['o'] = directions.upright
-local control_keys = {quit = 'q', restart = 'r'}
+local control_keys = {quit = 'q', restart = 'r', configure = 'c'}
 
 local win_image = nil
 
@@ -679,6 +682,38 @@ function drawWin()
 	love.graphics.draw(win_image, left_border, up_border, 0, scale, scale)
 end
 
+function drawConfig()
+	local text = nil
+	if configuration_step == configuration_steps.quit then
+		text = "Quit"
+	elseif configuration_step == configuration_steps.restart then
+		text = "Restart"
+	elseif configuration_step == configuration_steps.configure then
+		text = "Button configuration"
+	elseif configuration_step == directions.up then
+		text = "Up"
+	elseif configuration_step == directions.upleft then
+		text = "Up-Left"
+	elseif configuration_step == directions.left then
+		text = "Left"
+	elseif configuration_step == directions.downleft then
+		text = "Down-Left"
+	elseif configuration_step == directions.down then
+		text = "Down"
+	elseif configuration_step == directions.downright then
+		text = "Down-Right"
+	elseif configuration_step == directions.right then
+		text = "Right"
+	elseif configuration_step == directions.upright then
+		text = "Up-Right"
+	else
+		error("Impossible configuration step")
+	end
+
+	love.graphics.setColor(1, 1, 1)
+	love.graphics.print(text)
+end
+
 -- ------------------------------------------------------------------
 -- Callbacks
 -- ------------------------------------------------------------------
@@ -701,16 +736,38 @@ function love.update(dt)
 end
 
 function love.keypressed(key)
-	last_key_pressed = key
+	if game_mode == gamemodes.config then
+		-- This is a hack. Each "enum value" corresponds to an integer, and we are iterating
+		-- through them. -3 to -1 are control keys, and 0 to 7 are direction keys
+		if configuration_step >= directions.up and configuration_step <= directions.upright then
+			direction_keys[key] = configuration_step
+		elseif configuration_step == configuration_steps.quit then
+			control_keys.quit = key
+		elseif configuration_step == configuration_steps.restart then
+			control_keys.restart = key
+		elseif configuration_step == configuration_steps.configure then
+			control_keys.configure = key
+		end
 
-	if key == control_keys.quit then
-		love.event.quit()
-	elseif key == control_keys.restart then
-		newGame()
-	elseif direction_keys[key] ~= nil then
-		step(direction_keys[key])
-	elseif key == 'printscreen' then
-		debug = true
+		configuration_step = configuration_step + 1
+		if configuration_step > directions.upright then
+			game_mode = gamemodes.normal
+		end
+	else
+		last_key_pressed = key
+
+		if key == control_keys.configure and game_mode == gamemodes.normal then
+			game_mode = gamemodes.config
+			configuration_step = configuration_steps.quit
+		elseif key == control_keys.quit then
+			love.event.quit()
+		elseif key == control_keys.restart then
+			newGame()
+		elseif direction_keys[key] ~= nil then
+			step(direction_keys[key])
+		elseif key == 'printscreen' then
+			debug = true
+		end
 	end
 end
 
@@ -727,6 +784,8 @@ function love.draw()
 		drawPlayer()
 	elseif game_mode == gamemodes.won then
 		drawWin()
+	elseif game_mode == gamemodes.config then
+		drawConfig()
 	else
 		error("Impossible game mode")
 	end