[haiku-appserver] resize operation
- From: Adi Oanca <adioanca@xxxxxxxxxxxxxx>
- To: AppServer <haiku-appserver@xxxxxxxxxxxxx>
- Date: Tue, 07 Jun 2005 16:00:39 +0300
Hi all,
Have a question for you.
Have a BView with 2 children. One is bottom aligned, the other right
aligned. We're resizing the view.
resize (50,0)
- child 1 is not invalidated
- child 2 is completely invalidated
resize (0,50)
- child 1 is completely invalidated
- child 2 is not invalidated
resize(50, 50)
- both are invalidated.
This is how R5 behaves.
We can do better, the problem is how?
- in the first case I can copy child2 to the right using HW acc.
- in the 2nd case I can copy child1 to the bottom using HW acc.
- in the 3rd case I can copy _only one_ of them using HW acc,
the other being completely redrawn. The problem is: which one
should I copy? The obvious answer would be: copy in the direction
that has the biggest area of right or bottom aligned views. BUT,
should I spend CPU cycles and memory to calculate which area is
the biggest? Is it feasible? (BTW, same could be done for bottom-right
aligned ones)
The approach I took was to always copy right aligned views,
but that is not of much use when resizing on the vertical.
What should I do?
Thanks,
Adi.
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