On 27/04/15 15:58, Sean P. DeNigris wrote:
Design Questions:
- TxModel - what is the advantage of a double linked list vs the old Text
implementation?
I vaguely remember being told in a data structures class to use
circular linked lists instead of begin and end markers. I assume
that could have performance implications. It was also assumed to be much
easier to get right.
The performance of a 2-array-backed structure like the old Text
becomes unacceptable for larger texts. It is fine when just adding at
the end, but editing somewhere in the middle gets slow.
- Why no strike fonts? Why is Verdana commented out in TxFontAttribute
class>>#defaultValue?
AFAIK the default font needs to either be supplied by the image or be
platform dependent. I assume the Athens renderer is (was?) not able
to render strike fonts.
It took me a while to realize that text in TxBasicSpan is the TxModel.
Stephan
