Thread: What compilation flags should I use to upgrade from GTK2 to GTK3?

Originally Posted by hikerFreak

How would you change the theme of the program to dark?

From the command line you can do something like this:
GTK_THEME=Adwaita:dark ./your_gtk_progam

I'm not sure how to do it in the program code itself. You might look here.

EDIT:
Looks like you might just have to do this after gtk_init:

Code:

    GtkCssProvider *css = gtk_css_provider_get_named("Adwaita", "dark");
    GdkScreen *screen = gdk_screen_get_default();
    gtk_style_context_add_provider_for_screen(
        screen,
        GTK_STYLE_PROVIDER(css),
        GTK_STYLE_PROVIDER_PRIORITY_USER);