Implement joystick, recognize background inputs

button.lua

@@ -10,11 +10,20 @@ function Button:new(x, y, r, b)
 end
 
 function Button:update(dt)
-    if love.keyboard.isDown(self.b) then
+    if self.b == "triggerleft" or self.b == "triggerright" then
+        local axis = joystick:getGamepadAxis(self.b)
+        if axis > 0.5 then
             self.press = true
         else
             self.press = false
         end
+    else
+        if joystick:isGamepadDown(self.b) then
+            self.press = true
+        else
+            self.press = false
+        end
+    end
 end
 
 function Button:draw()

main.lua

@@ -1,41 +1,52 @@
 function love.load()
+    -- Recognize background input
+    local ffi = require("ffi")
+    ffi.cdef[[
+    typedef enum
+    {
+        SDL_FALSE = 0,
+        SDL_TRUE = 1
+    } SDL_bool;
+
+    SDL_bool SDL_SetHint(const char *name, const char *value);
+    ]]
+    local sdl = ffi.os == "Windows" and ffi.load("SDL2") or ffi.C
+    sdl.SDL_SetHint("SDL_JOYSTICK_ALLOW_BACKGROUND_EVENTS", "1")
+
     local Button = require "button"
     
+    local joysticks = love.joystick.getJoysticks()
+    joystick = joysticks[1]
+
     --movement keys
-    movement = {}
-    mL = Button(8, 27, 24, "a")
-    mD = Button(62, 27, 24, "s")
-    mR = Button(109, 53, 24, "d")
-    mU = Button(127, 144, 30, "space")
+    mL = Button(8, 27, 24, "dpleft")
+    mD = Button(62, 27, 24, "dpdown")
+    mR = Button(109, 53, 24, "dpright")
+    mU = Button(127, 144, 30, "dpup")
+    movement = {mL, mD, mR, mU}
 
     --attack keys
-    attack = {}
-    bA = Button(159, 29, 24, "u")
-    bB = Button(208, 8, 24, "i")
-    bC = Button(262, 9, 24, "o")
-    bD = Button(317, 16, 24, "p")
-    bE = Button(155, 85, 24, "j")
-    bF = Button(206, 64,  24, "k")
-    bG = Button(262, 64, 24, "l")
-    bH = Button(315,72, 24, ";")
+    bA = Button(159, 29, 24, "x")
+    bB = Button(208, 8, 24, "y")
+    bC = Button(262, 9, 24, "rightshoulder")
+    bD = Button(317, 16, 24, "leftshoulder")
+    bE = Button(155, 85, 24, "a")
+    bF = Button(206, 64,  24, "b")
+    bG = Button(262, 64, 24, "triggerright")
+    bH = Button(315,72, 24, "triggerleft")
+    attack = {bA, bB, bC, bD, bE, bF, bG, bH}
 end
 
 function love.update(dt)
     --movement keys
-    mL:update(dt)
-    mD:update(dt)
-    mR:update(dt)
-    mU:update(dt)
+    for _, button in ipairs(movement) do
+        button:update(dt)
+    end
 
     --attack keys
-    bA:update(dt)
-    bB:update(dt)
-    bC:update(dt)
-    bD:update(dt)
-    bE:update(dt)
-    bF:update(dt)
-    bG:update(dt)
-    bH:update(dt)
+    for _, button in ipairs(attack) do
+        button:update(dt)
+    end
 end
 
 function love.draw()
@@ -43,18 +54,12 @@ function love.draw()
     love.graphics.setBackgroundColor(1, 179/255, 102/255)
 
     --movement keys
-    mL:draw()
-    mD:draw()
-    mR:draw()
-    mU:draw()
+    for _, button in ipairs(movement) do
+        button:draw()
+    end
 
     --attack keys
-    bA:draw()
-    bB:draw()
-    bC:draw()
-    bD:draw()
-    bE:draw()
-    bF:draw()
-    bG:draw()
-    bH:draw()
+    for _, button in ipairs(attack) do
+        button:draw()
+    end
 end