[*] Initial commit.

device/love.lua

@@ -0,0 +1,60 @@
+-- Simple Device driver for Yui, only depends on LÖVE 2D, listens to
+-- keyboard and mouse pointer.
+
+local Device = {}
+Device.__index = Device
+
+
+function Device.new()
+    return setmetatable({
+        px = nil, py = nil,
+        clicking = nil,
+
+        confirm = nil,
+        cancel = nil,
+        up = nil,
+        left = nil,
+        down = nil,
+        right = nil,
+    }, Device)
+end
+
+function Device:snapshot()
+    local snap = {}
+
+    -- Mouse pointer
+    local px,py = love.mouse.getPosition()
+    local clicking = love.mouse.isDown(1)
+
+    snap.px,snap.py = px,py
+    snap.pointing = clicking
+    snap.clicked = self.clicking and not clicking
+    snap.pointer = px ~= self.px or py ~= self.py or snap.clicked or snap.pointing
+
+    -- Keyboard input
+    local confirm = love.keyboard.isDown('return', 'space')
+    local cancel = love.keyboard.isDown('escape')
+    local up = love.keyboard.isDown('up', 'w')
+    local left = love.keyboard.isDown('left', 'a')
+    local down = love.keyboard.isDown('down', 's')
+    local right = love.keyboard.isDown('right', 'd')
+
+    snap.confirm = self.confirm and not confirm
+    snap.cancel = self.cancel and not cancel
+    snap.up = self.up and not up
+    snap.left = self.left and not left
+    snap.down = self.down and not down
+    snap.right = self.right and not right
+    snap.action = snap.confirm or snap.cancel or
+                  snap.up or snap.left or snap.down or snap.right
+
+    -- Update old state
+    self.px,self.py = px,py
+    self.clicking = clicking
+    self.confirm,self.cancel = confirm,cancel
+    self.left,self.up,self.right,self.down = left,up,right,down
+
+    return snap
+end
+
+return Device