On Thu, Dec 18, 2014 at 06:31:11PM +0900, Daiki Ueno wrote: > The actual interaction is: > > 1. a user clicks "Punctuation" tab for the first time > 2. the application starts loading Unicode punctuation characters in > a background thread; if it takes long, a placeholder page is shown > 3. the "Punctuation" page is shown > > So, my question is, is there any easy way to inject the phase 2 into the > page transition of GtkSidebar?
You could take a look at how we do it in gnome-documents and gnome-photos: https://git.gnome.org/browse/gnome-documents/tree/src/embed.js#n388 https://git.gnome.org/browse/gnome-photos/tree/src/photos-embed.c The first one uses a separate unnamed page in the stack for the spinner and the second one puts the spinner in an overlay. Both of them use GtkStackSwitcher instead of GtkSidebar, though. Cheers, Debarshi
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