On Thu, Jul 5, 2012 at 10:03 AM, Michele <mic...@gmail.com> wrote: > I'm facing some problems with what seemed to me a trivial thing at > first glance. I just want to vertical align an actor to the center of > the screen. This actor is added to Main.uiGroup and its size is > variable. The actor at issue is the gnome shell dash that I moved out > of the overview in the dash-to-dock extension. > > I've tried to achieve this result in a lot of different ways but none > of them is working properly. > > 1. Put the actor inside a container like St.Bin and use the y_align > property to keep it at middle. This works but the extra void area > above and below the child actor steal click events from the window > actors. Applying a clip to the actor affects only it's visibility and > not such events.
Set the St.Bin's reactivity to false? > 2. Use notify::height to manually update the actor vertical position. > This cause a lot of Clutter allocation cycles warnings. > > 3. Patch Main.uiGroup allocate function. Direclty replacing the > allocate function in the shell code works like expected. However, I > can't remove the original signal (It's a genericContainer) since I > can't obtain it's id. I also tried obtaining it with > 'g_signal_handler_find', but I had problems understanding what should > be passed as the 'gpointer instance' first argument. Thus I can only > add an additional signal and reallocate the actor at the correct > vertical position. This seemed to work at first although I'm doubling > the number of allocation calls, but dash popupmenus are often placed > at the wrong position. > > 4.) Connect to the actor 'allocation-changed' signal and force a > reallocation of the actor itself. This seemingly works, but I'm not > sure if it's a good practice. I don't see any warning or error and I'm > still allocating the actor twice as needed. Popupmenus are in the > correct position tough. > > 5.) Set the actor anchor_point to CLUTTER_GRAVITY_WEST so that the > position is always correct when it's resized. The main problem here is > that if the dash height is even, the actor appears blurred, since > icons positions are not integer values. I can get over this issue by > setting the y coordinate of the dash at an half-integer value as well, > but nobody assure me that after adding or removing an icon from the > dash it's height will remain always even or always odd. > > This problem drove me mad... and now I've run out of ideas. Any > suggestion or correction about my assumptions? > _______________________________________________ > gnome-shell-list mailing list > gnome-shell-list@gnome.org > https://mail.gnome.org/mailman/listinfo/gnome-shell-list -- Jasper _______________________________________________ gnome-shell-list mailing list gnome-shell-list@gnome.org https://mail.gnome.org/mailman/listinfo/gnome-shell-list
