pds@quintus.UUCP (Peter Schachte) (05/05/88)
Why does Intuition send a REDISPLAY (or whatever it's called -- I don't have my manuals with me) message to me for a SIMPLE_REFRESH window when it's moved, even if the window is entirely visible? Why doesn't Intuition just bitblt from the old place on the screen to the new place? This was a surprise to me! -- -Peter Schachte pds@quintus.uucp ...!sun!quintus!pds
dillon@CORY.BERKELEY.EDU (Matt Dillon) (05/05/88)
:Why does Intuition send a REDISPLAY (or whatever it's called -- I don't :have my manuals with me) message to me for a SIMPLE_REFRESH window when :it's moved, even if the window is entirely visible? Why doesn't :Intuition just bitblt from the old place on the screen to the new place? :This was a surprise to me! Although moving a window may appear to be trivial, one must remember that the algorithm involved must deal with the possibility of other overlapping and underlapping windows. In this particular case, I believe that the window's contents does get partially overwritten (or maybe it's a condition that intuition isn't sure of, and so doesn't take any chances). -Matt