Implement pause state.

flickyclone.org

@@ -446,6 +446,7 @@ Let's start with the base ~GameState~ class, it should keep the shared logic of
   	  up=false,
   	  down=false,
   	  jump=false,
+  	  pause_key_was_released=false,
      }
      self.ended = false
      self.next = nil
@@ -458,6 +459,9 @@ Let's start with the base ~GameState~ class, it should keep the shared logic of
      self.input.up = love.keyboard.isDown("w", "up")
      self.input.down = love.keyboard.isDown("down", "s")
      self.input.jump = love.keyboard.isDown("space")
+     if not (self.input.pause_key_was_released or self.input.start) then
+  	  self.input.pause_key_was_released = true
+     end
   end
 
   function GameState:update(dt)
@@ -548,9 +552,15 @@ Also, it'll spawn a couple entities for enemies that will just move around the s
      self:updateItems(dt)
      self:updateEnemies(dt)
      self:updateChirps(dt)
+     if self.input.pause_key_was_released and self.input.start then
+  	  self.ended = true
+  	  self.next = Pause:new(self)
+  	  self.input.pause_key_was_released = false
+     end
   end
 
   function Play:draw()
+     Play.__super.draw(self)
      love.graphics.setColor(0.2, 0.2, 0.2)
      self.map:draw()
      love.graphics.setColor(0, 0.8, 0.1)
@@ -560,13 +570,45 @@ Also, it'll spawn a couple entities for enemies that will just move around the s
      end
   end
 #+end_src
+
+Let's define a ~Pause~ state and see how it connects to ~Play~, it'll need to keep the ~Play~ state instance so it can be resumed after unpausing:
+#+name: pauseState
+#+begin_src lua :tangle no
+  local Pause = GameState:extend()
+
+  function Pause:init(play_state)
+     Pause.__super.init(self)
+     self.play_state = play_state
+  end
+
+  function Pause:update(dt)
+     Pause.__super.update(self, dt)
+     if self.input.pause_key_was_released and self.input.start then
+  	  self.input.pause_key_was_released = false
+  	  self.ended = true
+  	  self.play_state.ended = false
+  	  self.next = self.play_state
+     end
+  end
+
+  function Pause:draw()
+     Pause.__super.draw(self)
+     local pause_str = "~ PAUSE ~"
+     local font = love.graphics.getFont()
+     local height = font:getHeight()
+     local width = font:getWidth(pause_str)
+     love.graphics.setColor(1, 1, 1)
+     love.graphics.print(pause_str, 320/2, 200/2, 0, 2, 2, width/2, height/2)
+  end
+#+end_src
 #+begin_src lua :tangle states.lua :noweb yes
-     <<playState>>
-     <<titleState>>
-     return {
-  	  Play=Play,
-  	  Title=Title,
-     }
+  <<pauseState>>
+  <<playState>>
+  <<titleState>>
+  return {
+   Play=Play,
+   Title=Title,
+  }
 #+end_src
 
 #+begin_src lua
@@ -1320,8 +1362,13 @@ Need to check ~next_state.pos~ and resulting ~top_left_tile~ for this case.
   y = 184
 }
 
-** TODO Implement game pause as ~Play~ substate
+** DONE Implement game pause as ~Play~ substate
 DEADLINE: <2024-09-24 mar>
+:LOGBOOK:
+CLOCK: [2024-10-02 mié 14:40]--[2024-10-02 mié 15:01] =>  0:21
+:END:
+
+It's kinda working but I need to debounce it.
 
 ** TODO replace hardcoded player initial position (180, 100) with marker/point from Tiled map
 

states.lua

@@ -15,6 +15,7 @@ function GameState:init()
 	  up=false,
 	  down=false,
 	  jump=false,
+	  pause_key_was_released=false,
    }
    self.ended = false
    self.next = nil
@@ -27,6 +28,9 @@ function GameState:updateInput(dt)
    self.input.up = love.keyboard.isDown("w", "up")
    self.input.down = love.keyboard.isDown("down", "s")
    self.input.jump = love.keyboard.isDown("space")
+   if not (self.input.pause_key_was_released or self.input.start) then
+	  self.input.pause_key_was_released = true
+   end
 end
 
 function GameState:update(dt)
@@ -36,6 +40,32 @@ end
 function GameState:draw()
 end
 
+local Pause = GameState:extend()
+
+function Pause:init(play_state)
+   Pause.__super.init(self)
+   self.play_state = play_state
+end
+
+function Pause:update(dt)
+   Pause.__super.update(self, dt)
+   if self.input.pause_key_was_released and self.input.start then
+	  self.input.pause_key_was_released = false
+	  self.ended = true
+	  self.play_state.ended = false
+	  self.next = self.play_state
+   end
+end
+
+function Pause:draw()
+   Pause.__super.draw(self)
+   local pause_str = "~ PAUSE ~"
+   local font = love.graphics.getFont()
+   local height = font:getHeight()
+   local width = font:getWidth(pause_str)
+   love.graphics.setColor(1, 1, 1)
+   love.graphics.print(pause_str, 320/2, 200/2, 0, 2, 2, width/2, height/2)
+end
 local Play = GameState:extend()
 
 function Play:init()
@@ -83,9 +113,15 @@ function Play:update(dt)
    self:updateItems(dt)
    self:updateEnemies(dt)
    self:updateChirps(dt)
+   if self.input.pause_key_was_released and self.input.start then
+	  self.ended = true
+	  self.next = Pause:new(self)
+	  self.input.pause_key_was_released = false
+   end
 end
 
 function Play:draw()
+   Play.__super.draw(self)
    love.graphics.setColor(0.2, 0.2, 0.2)
    self.map:draw()
    love.graphics.setColor(0, 0.8, 0.1)