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| scroll_bar->compute |
<-request_compute
is not @nil,
this method will:
<-object
has the send method
scroll_bar->bubble_scroll_bar. If this is
the case, this method is called with this scrollbar as argument. The
receiving object is supposed to activate scroll_bar->bubble,
passing the current viewport settings to the scrollbar.<-object
has all the methods scroll_bar<-start, scroll_bar<-view
and scroll_bar<-length,
the scrollbar will invoke them and update the viewport using the result.
Backward compatibility only.
If the scrolled object or the viewport is modified, the window or
scroll_bar<-object
should invoke graphical->request_compute
on the scroll_bar to activate this mechanism.