On Tue, Aug 21, 2012 at 1:00 PM, Benjamin Berg <[email protected]> wrote:
> On Tue, 2012-08-21 at 12:43 +0530, Ajay Garg wrote: > > Does calling "process_updates" causes the GUI updates to take place, > > before the user returns from the function? > > Yes, the updates are done immediately and the drawing commands are > pushed out to the X server. And I do expect that this is *exactly* what > you requested. > You don't know exactly when the GUI update will be visible on the > screen. But that is normal and has nothing to do with process_updates. > > An example where this mechanism was used in GTK+ is scrollbars. When you > are dragging them, they should be redrawn right away so that they move > correctly. > > Benjamin > Awesome !!!! I'll give this a try right away, and get back to you with the results !! Thanks a ton !!! Thanks and Regards, Ajay > > > That is, will the following scenario necessarily happen :: > > > > logic statement 1 > > update GUI > > process_updates ===> causes the GUI update > > logic statement 2 ===> necessarily after GUI > > update > > > > > > > > I doubt that the above is a guarantee, as you have already mentioned > > that the actual GUI processing will take place whenever X server sees > > it fit. > > Anyhow, just wish to confirm :) > > > > > > Thanks and Regards, > > Ajay > > > > Please > > note that you don't have much control here, you don't know how > > fast the > > update will happen, or even if it is ever visible to the user. > > The X > > server will process the drawing commands when it sees fit. > > > > > My intention is to somehow have GUI updates in a synchronous > > manner, > > > and not rely upon "gobject.idle_add", which would have to > > have > > > dividing a long workflow into many sub-parts, and chaining > > these > > > sub-parts through "gobject.idle_add". > > > This is EXTREMELY painful, especially when one needs to do > > it on an > > > already existing codebase. > > > > > > As an alternative you could do something like: > > > > def idle_add_function(pos): > > if pos[0] == 1: > > # logic 1 > > elif pos[0] == 2: > > # logic 2 > > else: > > return False > > > > queue_update() > > > > pos[0] += 1 > > return True > > > > Where pos = [0] to begin with (the usage of the list is just > > so that it > > is global in a way, any object will do, it just needs to be > > something > > permuteable). > > > > Benjamin > > > > > > _______________________________________________ > > Sugar-devel mailing list > > [email protected] > > http://lists.sugarlabs.org/listinfo/sugar-devel > > >
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