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. 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
