Re: [Boost-docs] Pop-up comment callouts?

Subject: Re: [Boost-docs] Pop-up comment callouts?
From: Daniel James (daniel_james_at_[hidden])
Date: 2007-11-05 20:31:57

David Abrahams wrote:

> At minimum it could just cover the code (preferably above the line of
> the callout).  If you need to see the callouts along with all the
> code, you can scroll down.

I don't think it's possible with the current html - and probably not 
even if the html is rearranged.

The problem would be writing a selector which matches the callout icon 
to the text. On the boost consulting site the popup menu can be 
displayed because the <ul> that contains the popup menu is contained 
within the <li> that the mouse is hovering over (if you look at the 
source code, the menu is made up of lists within lists). As well as 
descendants, CSS selectors can select siblings that follow an element - 
you can only move to an element's children or later siblings (and not 
all browsers support sibling selectors), not to it's parents or earlier 
siblings. And it's the final element in the selector that attributes are 
applied to.

But that callout text is a sibling of the div that contains the callout 
icon - it's the icon's grandparent's sibling (great uncle?), which can't 
be linked to it using a CSS selector.

Daniel