I'm still not understanding.  Style.position is not inheriting so how would it 
cascade down?  Isn't .Application only applied to the <body/>?

Thanks,
-Alex

On 6/4/18, 9:15 AM, "Harbs" <harbs.li...@gmail.com> wrote:

    I’m suggesting that we change defaults.css
    
    from:
    Application
    {
        padding: 0px;
        margin: 0px;
    }
    
    to:
    Application
    {
        padding: 0px;
        margin: 0px;
        position: relative;
    }
    
    I believe this will resolve this issue as the default would cascade down to 
all sub-elements. The default would be relative, but beads would be free to 
change that to whatever they want.
    
    Of course, that would dictate that UIBase belongs in Basic and not Core… ;-)
    
    Harbs
    
    > On Jun 4, 2018, at 7:10 PM, Alex Harui <aha...@adobe.com.INVALID> wrote:
    > 
    > I’m not sure exactly what change you are proposing, but UIBase used to 
set position=relative on all positioners.  We took that away so that the "flex" 
and other display/layout styles would not have to deal with the excess clutter 
and overhead of having set position on so many elements in the DOM.  Via PAYG, 
only the elements that need to have a style.position should have it set.
    > 
    > My 2 cents,
    > -Alex
    > 
    > On 6/4/18, 8:44 AM, "Harbs" <harbs.li...@gmail.com> wrote:
    > 
    >    It just occurred to me that the problem is due to the default position 
being static.
    > 
    >    I just added position: relative; to the .Application css and that 
resolved the issue as well.
    > 
    >    I wonder if we could completely do away with the offsetParent logic in 
UIBase if we make the default position: relative. That would have a major 
positive impact on performance.
    > 
    >    Thoughts?
    >    Harbs
    > 
    >> On Jun 4, 2018, at 6:36 PM, Alex Harui <aha...@adobe.com.INVALID> wrote:
    >> 
    >> Hi Yishay,
    >> 
    >> IMO, the new fix is better.  And you took the right approach by 
examining the code flow in the debugger.  When layout fails for what appears to 
be a timing issue (in this case, offsetParent not set), we definitely want to 
take the time to carefully analyze why there is a timing issue instead of apply 
code to work around the current lifecycle.
    >> 
    >> I'm not sure we can recommend a general pattern for layouts.  I think 
there is some PAYG involved.  It could be that in some cases the View should be 
responsible for setting style.position.  Then the layouts don't have to spend 
the time verifying style.position.  In other cases the layouts could be used in 
places where other potential layouts don't rely on style.position being a 
particular value.  I think BasicLayout for Containers is an example.
    >> 
    >> The code you used could be put into a utility function for layouts to 
use to guarantee that x,y will work as expected.
    >> 
    >> Thanks,
    >> -Alex
    >> 
    >> On 6/4/18, 8:22 AM, "yishayw" <yishayj...@hotmail.com> wrote:
    >> 
    >>   Looking at it some more it has nothing to do with data binding. I 
pushed a
    >>   different fix (799f1878250d8c69347f08442c2c333740efdb8d) that changes 
the
    >>   layout itself. Here it's assumed the offsetParent is explicitly set 
before
    >>   children's x and y are set. Should this be a general pattern?
    >> 
    >> 
    >> 
    >> 
    >>   --
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    >> 
    > 
    > 
    > 
    
    

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