[antlr-interest] Serious doubts on usage of incremental parsinginides

[Jean Bovet]

Thanks for all you comments! I will improve ANTLRWorks in that way.

Jean

On 26 avr. 05, at 13:55, Loring Craymer wrote:

> At 02:31 PM 4/25/2005, Jean Bovet wrote:
>> 4) As Prashant wrote, the only time I notice a slowdown is when Swing 
>> updates the syntax diagram view. Because it is doing that in the 
>> events thread, if the display is taking too much time, the text zone 
>> will be "frozen" for a few ms and the user will notice that. I didn't 
>> find a nice way to solve that (is Swing able to update a view in 
>> another thread than the event thread?): I am currently caching the 
>> syntax diagram in a image (in thread C) so when Swing updates the 
>> view, only the image has to be drawn (and this is done only when the 
>> user pauses long enough).
>>
>> In short, everything is fast and doesn't alter the edit experience of 
>> the user except when Swing is updating part of the window. How are 
>> other IDEs doing to update graphic elements without delaying the user 
>> input ? Are they updating them in another thread than the event 
>> thread or is it simply a matter of speed when rendering these 
>> elements ?
>
> Jean--
>
> The syntax diagram is an "analysis" pane rather than an editing pane, 
> so it need not be updated as the user types--when I'm typing, I'm not 
> concerned with analysis.  I'd suggest update on events which change 
> the editing screen significantly--navigating to another part of the 
> text, for example, or mouse events in general (one hand off of the 
> keyboard).  John Mitchell's comment on separators is a good one--I 
> like having the editor flash matching parentheses and braces if you 
> pause after hitting a close parenthesis or brace.  Pause after 
> semicolon is another good update point--when I do that, I have usually 
> paused to think.
>
> I also find it unsettling when an application decides to update the 
> screen with a very slow update operation just because I've paused for 
> a few seconds--all too often I have just gotten my hands back in a 
> typing position when that happens.
>
> --Loring
>
>
>> Best regards,
>>
>> Jean
>
>