56 lines
1.6 KiB
Lua
56 lines
1.6 KiB
Lua
-- This file is part of SUIT, copyright (c) 2016 Matthias Richter
|
|
|
|
local BASE = (...):match('(.-)[^%.]+$')
|
|
|
|
local function isType(val, typ)
|
|
return type(val) == "userdata" and val.typeOf and val:typeOf(typ)
|
|
end
|
|
|
|
return function(core, normal, ...)
|
|
local opt, x,y = core.getOptionsAndSize(...)
|
|
opt.normal = normal or opt.normal or opt[1]
|
|
opt.hovered = opt.hovered or opt[2] or opt.normal
|
|
opt.active = opt.active or opt[3] or opt.hovered
|
|
opt.id = opt.id or opt.normal
|
|
|
|
local image = assert(opt.normal, "No image for state `normal'")
|
|
|
|
core:registerMouseHit(opt.id, x, y, function(u,v)
|
|
-- mouse in image?
|
|
u, v = math.floor(u+.5), math.floor(v+.5)
|
|
if u < 0 or u >= image:getWidth() or v < 0 or v >= image:getHeight() then
|
|
return false
|
|
end
|
|
|
|
if opt.mask then
|
|
-- alpha test
|
|
assert(isType(opt.mask, "ImageData"), "Option `mask` is not a love.image.ImageData")
|
|
assert(u < mask:getWidth() and v < mask:getHeight(), "Mask may not be smaller than image.")
|
|
local _,_,_,a = mask:getPixel(u,v)
|
|
return a > 0
|
|
end
|
|
|
|
return true
|
|
end)
|
|
|
|
if core:isActive(opt.id) then
|
|
image = opt.active
|
|
elseif core:isHovered(opt.id) then
|
|
image = opt.hovered
|
|
end
|
|
|
|
assert(isType(image, "Image"), "state image is not a love.graphics.image")
|
|
|
|
core:registerDraw(opt.draw or function(image,x,y, r,g,b,a)
|
|
love.graphics.setColor(r,g,b,a)
|
|
love.graphics.draw(image,x,y)
|
|
end, image, x,y, love.graphics.getColor())
|
|
|
|
return {
|
|
id = opt.id,
|
|
hit = core:mouseReleasedOn(opt.id),
|
|
hovered = core:isHovered(opt.id),
|
|
entered = core:isHovered(opt.id) and not core:wasHovered(opt.id),
|
|
left = not core:isHovered(opt.id) and core:wasHovered(opt.id)
|
|
}
|
|
end
|