invoke the layout's InvalidateLayout() anymore. This could cause problems when
the layout caches layout related information and also updates those on calls
other than LayoutView(). A call to such a method after an InvalidateLayout()
would mark the cached info valid and the layout would use the cached info
until the first InvalidateLayout() after the next LayoutView(), even if
BView::InvalidateLayout() had been called again in the meantime.
* Introduced a new method BView::ResetLayoutInvalidation(), which must be
called by layout implementations whenever they have updated their cached
information and need further InvalidateLayout() notifications.
* Adjusted the existing layout implementations to use the method.
Fixes bug #4047.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31316 a95241bf-73f2-0310-859d-f6bbb57e9c96
a0747aad3b