parent sprite isn't visible but childsprite is visible?

bysreg

So,
I try to setVisible = false to parentSprite, parentSprite has a child which is childSprite. but the childSprite:isVisible() return true. is this the expected behaviour? i mean when a parent isn't visible on the screen, then the child mustn't be visible too right?

thanks

bowerandy

Hi @bysreg,

Yes, you're right. Although childSprite won't be visible on screen it is still marked as visible by it's visibility flag. One of the first helper functions I wrote was this:

function Sprite:isVisibleDeeply() -- Answer true only if the sprite and all it's a parents are visible. Normally, isVisible() will -- return true even if a sprite is actually not visible on screen by wont of one of it's parents -- being made invisible. -- local try=self while (try) do if not(try:isVisible() and try:getAlpha()>0) then return false end try = try:getParent() end return true end

Then you can just call:

if childSprite:isVisibleDeeply() then

You can either just copy this method into your own code or you might want to take my BhHelpers library since it contains this and several more useful functions. You can get BhHelpers off GitHub. Make sure you read the README for where to place it on disk.

best regards

bysreg

thanks @bowerandy for the answer

all right. i'll check your code.

and i suggest it should be reflected in the reference document