On 2012-04-22 at 21:39, Tyson Neuroth wrote: > The click action in my app seams to be slow. Especially in the case of a > certain part of it where I have a custom file browser I'm trying to make, > in which you click to scroll down or up. > > The function launched by the click action in this case just moves actors up > or down, so far just 11 of them. If I click to fast, nothing happens, > about 1/2 to 1/3rd of a second is too fast. > > I do wonder if the lag could be related to how clutter_click_action works. > Is the performance of a button event different than a click action?
considering that ClickAction is implemented in terms of button-press and button-release events, then I can't see this being a possibility. my suggestion is to look at some profiling and or instrumentation of your code and, failing that, of Clutter. > Is there a way in which, even even when clicking fast, the functions will > all still get executed even if there is a delay? there is no delay for the ::clicked signal handling. the only delay is set for the long press support; but is only called if the pointer button remains pressed for the duration of the long press timeout value. > Also i am wondering if opacity reduces performance considerably? opacity by itself doesn't reduce performance, though it may end up triggering blending paths, and some deferred rendering GPUs may have issues with that. > Also, is > it much faster to hide/show an actor than it is to move it? not really; both cases will trigger a relayout and a redraw. > Lastly, is it okay to hide/show an actor which is already hidden/shown? > For example, in a loop where whether an actor is shown or hidden depends > on a condition, should you check wether actors are already hidden/shown > before hiding/showing them? not really, no: clutter_actor_show() and clutter_actor_hide() will just return if called on a visible, or non visible, actor, respectively. ciao, Emmanuele. -- Emmanuele Bassi, Intel Open Source Technology Center _______________________________________________ clutter-app-devel-list mailing list clutter-app-devel-list@clutter-project.org http://lists.clutter-project.org/listinfo/clutter-app-devel-list
