DrawAfterChildren() isn't called after changing of tab

[shinta]

When BView "ParentView" has the child BTabView "ChildView" and "ChildView"'s selection of tab is changed, "ParentView"'s DrawAfterChildren() isn't called.

Haiku: hrev30186
​SHINTA (Bug No.22)

[stippi]

You are probably mixing up different things. DrawAfterChildren() is only called if your (parent) view has the flag "B_DRAW_ON_CHILDREN" set. BTabViews do not have this flag set, unless you manually added this flag yourself. If you have not done so, this bug is invalid. Have you added the flag?

[stippi]

I looked at the BeBook documentation for DrawAfterChildren() again. It is unfortunately not clear, but I am pretty sure I checked the BeOS behavior. The documentation hints that you want to use this for the rare case where you want to paint *on* children, but it doesn't mention the fact that this is only possible if you also have the B_DRAW_ON_CHILDREN flag set. Anyways, although the documentation may be misleading, Haiku should be 100% compatible with BeOS in this regard, I wrote a specific test application for this to cover various situations. DrawOnChildren() is never called if the flag is not set. It doesn't make any sense either, since if you don't paint *on* children, the drawing order is irrelevant.

[shinta]

Oh! Thank you for advice!

I can get desired result by Adding B_DRAW_ON_CHILDREN flag to the parent BView.

[stippi]

Thanks for the note.