estanglerbm commented on pull request #1046:
URL: https://github.com/apache/royale-asjs/pull/1046#issuecomment-759256952


   FYI, presentationModel.rowHeight is a fixed constant used in place of 
measuring actual row height in several places, such as 
VirtualListVerticalLayout and ListItemRendererInitializer.  So it shows up in 
Spark List and Spark TabBar and other places (not just Spark).  It makes a big 
difference for virtualized layouts, like for Spark List, that will take the 
available space and divide by this number.  (In ADG, things are modified a bit.)
   
   Actually, I retract my change on this;  18 is fine for now (at least for the 
current font).  The problem in TabBar is that the button faces on the tabs add 
a border and such.  I'll fix it another way.


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