improvement: port the selection to guisystem

It's a special guiElement, as it's not drawn by the GUISystem, but
the input handling code is usefull.

sonic-radiance.love/scenes/battlesystem/fighters/character/init.lua

@@ -12,15 +12,11 @@ function HeroFighter:new(owner, character, id)
 
   self:initVoices()
 
-  self.selection = nil
   self.exp = self.abstract.exp
 end
 
 function HeroFighter:update(dt)
   HeroFighter.super.update(self, dt)
-  if (self.selection ~= nil) then
-    self.selection:update(dt)
-  end
 end
 
 function HeroFighter:getAbstract()
@@ -72,9 +68,9 @@ function HeroFighter:verifyTargets()
 
   if (needTarget) then
     if (targetEnnemies) then
-      self.selection = SelectionSystem(self, self.owner.turnSystem.ennemies, true)
+      SelectionSystem(self, self.owner.turnSystem.ennemies, true)
     else
-      self.selection = SelectionSystem(self, self.owner, false)
+      SelectionSystem(self, self.owner, false)
     end
   else
     self.action:start()
@@ -87,7 +83,6 @@ function HeroFighter:attack()
 end
 
 function HeroFighter:receiveTarget(target)
-  self.selection = nil
   if (self.action ~= nil) then
     self.action:setTarget(target)
     self.action:start()
@@ -96,7 +91,6 @@ end
 
 function HeroFighter:goBackToMenu()
   self.turnSystem.scene.gui:setFocus("battleMenu")
-  self.selection = nil
 end
 
 -- LIFE functions

sonic-radiance.love/scenes/battlesystem/fighters/character/selection.lua

@@ -1,45 +1,42 @@
-local SelectionSystem = Object:extend()
+local GuiElement = require "birb.modules.gui.elements.parent"
+local SelectionSystem = GuiElement:extend()
 
 function SelectionSystem:new(owner, fighterSide, onlyAlive)
+  SelectionSystem.super.new(self, "selection", 0, 0, 1, 1)
   self.fighterList = fighterSide:getTargets(onlyAlive)
   self.owner = owner
   self.assets = self.owner.assets
   self.selectedTarget = 1
+  self:updateTarget()
+  self:getFocus()
 end
 
-function SelectionSystem:update(dt)
+function SelectionSystem:keypressed(key)
-  --Faire en sorte que cela permette de choisir la cible
+  if (key == "A") then
-  local keys = self.owner.turnSystem.scene:getKeys(1)
+    self.assets.sfx["mSelect"]:play()
-  self:purgeTarget()
+    self:selectTarget()
-  if (keys["up"].isPressed) then
+  elseif (key == "B") then
+    self.assets.sfx["mBack"]:play()
+    self:goBack()
+  elseif (key == "up") then
+    self:purgeTarget()
     if (self.selectedTarget == 1) then
       self.selectedTarget = #self.fighterList
     else
       self.selectedTarget = self.selectedTarget - 1
     end
     self.assets.sfx["mBeep"]:play()
-  end
+    self:updateTarget()
-  if (keys["down"].isPressed) then
+  elseif (key == "down") then
+    self:purgeTarget()
     if (self.selectedTarget == #self.fighterList) then
       self.selectedTarget = 1
     else
       self.selectedTarget = self.selectedTarget + 1
     end
     self.assets.sfx["mBeep"]:play()
+    self:updateTarget()
   end
-
-  self:updateTarget()
-
-  if (keys["A"].isPressed) then
-    self.assets.sfx["mSelect"]:play()
-    self:selectTarget()
-  end
-
-  if (keys["B"].isPressed) then
-    self.assets.sfx["mBack"]:play()
-    self:goBack()
-  end
-
 end
 
 function SelectionSystem:purgeTarget()
@@ -53,11 +50,15 @@ function SelectionSystem:updateTarget()
 end
 
 function SelectionSystem:selectTarget()
+  self:looseFocus()
+  self:destroy()
   self:purgeTarget()
   self.owner:receiveTarget(self.fighterList[self.selectedTarget])
 end
 
 function SelectionSystem:goBack()
+  self:looseFocus()
+  self:destroy()
   self:purgeTarget()
   self.owner:goBackToMenu()
 end