[Lazarus] Paintbox complete redraw

[Howard Page-Clark]

Boguslaw Brandys wrote:

> What is the cause of flicker ? I see it is common problem in Lazarus for
> all controls under Windows ?
> did you found the reason ?

I don't know, but presume flickering controls get painted successively rather than just once. I know various Lazarus graphics 
routines have recently had a major rewrite, and the evolution and testing is continuing. The results on Windows seem less 
satisfactory than on unix at the moment. This is the joy of using a tool that is continually being improved, and (I imagine - I'm 
not clever enough to be one myself) the headache of being a developer where the improvements you introduce in one part of a complex 
codebase give rise to unwanted or unforeseen side effects elsewhere. Software is imperfect, but Lazarus is much less imperfect than 
a year or two ago. I can only congratulate its developers on their skill and teamwork, and ability to overcome their disagreements 
and blend all their insights into a first rate, free tool.

Howard