Re: initialize `background-image` with a resource file

[Andrew Potter <agpotter gmail com>]

On Tue, Aug 23, 2022 at 10:44 AM Master via gtkmm-list <gtkmm-list gnome org> wrote:

The problem is that I dont know how to tell the `background-image` inside the style provider to "get the image from resource" instead of "file" please help me. 

Hello,

You can set background image to a resource like:

background-image: url("resource:///org/custom/example/sonbg.jpg");

Of course, you must define a gresource xml (Here, I've used the gresource prefix org/custom/example, but you will want to use your own namespace), compile it with glib-compile-resources and include it in your build system appropriately.

This is detailed in the GResource documentation at https://docs.gtk.org/gio/struct.Resource.html or in the gtkmm documentation at https://gnome.pages.gitlab.gnome.org/glibmm/classGio_1_1Resource.html#details

I have a toy application on github that does this if you need a more concrete example. The C++ code in https://github.com/talisein/mikuexpocountdown/blob/main/src/window.h loads the CSS from a resource, and that css references the gresources in https://github.com/talisein/mikuexpocountdown/tree/main/res