Button.lua

Button = {}

Button.new = function (x, y, w, h)
	local self = {}

	self.x = x
	self.y = y
	self.w = w
	self.h = h

	self.disabled = false
	self.hit = false
	self.hover = 0

	self.title = ""
	self.text_scale_x = 1
	self.text_scale_y = 1

	self.text_color = {r = 0, g = 0, b = 0}

	self.callback = function ()
	end

	self.onMousePress = function (x, y)
		if not self.disabled and x > self.x and x < self.x + self.w and y > self.y and y < self.y + self.h then
			self.hit = true
		end
	end

	self.onMouseRelease = function (x, y)
		if not self.disabled and x > self.x and x < self.x + self.w and y > self.y and y < self.y + self.h then
			self.hit = false
			self.callback()
		end
	end

	self.update = function (dt)
		self.hover = math.max(self.hover - 2 * dt, 0)

		local x, y = love.mouse.getPosition()
		if x > self.x and x < self.x + self.w and y > self.y and y < self.y + self.h then
			self.hover = 1
		end
	end

	self.draw = function ()
		if self.disabled then
			love.graphics.setColor(128, 128, 128)
			love.graphics.rectangle("fill", x, y, w, h)
			love.graphics.setColor(self.text_color.r * 0.5, self.text_color.g * 0.5, self.text_color.b * 0.5)
		else
			if self.hit then
				love.graphics.setColor(128, 128, 128)
				love.graphics.rectangle("fill", x, y, w, h)
				love.graphics.setColor(204, 204, 204)
				love.graphics.rectangle("fill", x+1, y+1, w-2, h-2)
			else
				local b = self.hover * 0.2 + 0.8
				love.graphics.setColor(160 * b, 160 * b, 160 * b)
				love.graphics.rectangle("fill", x, y, w, h)
				love.graphics.setColor(255 * b, 255 * b, 255 * b)
				love.graphics.rectangle("fill", x+1, y+1, w-2, h-2)
			end
			love.graphics.setColor(self.text_color.r, self.text_color.g, self.text_color.b)
		end
		love.graphics.printf(self.title, x, y + h * 0.5 - 8 * self.text_scale_y, w, "center", 0, self.text_scale_x, self.text_scale_y)
	end

	return self
end

return Button