Re: gtk3 layout background image

[Rúben Rodrigues <ruben_gr live com pt>]

Thanks!

But in GTK+2 we could change background in layout with this:

// Set picture as background.
//        gdk_pixbuf_render_pixmap_and_mask (pixbuf, &background, NULL, 0);
//        style = gtk_style_new ();
//        style->bg_pixmap[0] = background;
//        homeWindow = GTK_WIDGET(gtk_builder_get_object(builder, 
"layout_Home"));
//        gtk_widget_set_style (GTK_WIDGET(homeWindow), GTK_STYLE(style));

How i know witch containers draw background?

THanks


On 14-03-2017 12:55, Emmanuele Bassi wrote:
> Not all GTK containers draw a background, mostly for historical
> reasons. This has been true for GTK 1.x, 2.x, and 3.x.
>
> In particular, GtkLayout does not draw any background with CSS, so you
> will need to either subclass GtkLayout, override the GtkWidget::draw
> virtual function, and call gtk_render_* functions yourself; or you
> will need to put a GtkLayout into a parent container that does draw a
> background. You will, of course, need to style the parent container's
> background, not the GtkLayout itself.
>
> Ciao,
>   Emmanuele.
>
>
> On 14 March 2017 at 12:43, Rúben Rodrigues <ruben_gr live com pt> wrote:
> > I verify that i can't use css provider, don't works.
> >
> > My css file is :
> >
> > GtkLayout#layout_Home.background{
> >       background-image: url('background.png');
> > }
> >
> > GtkLabel#Home_Cooling_Tunnel1_Cooler_label1{
> >       color: white;
> > }
> >
> > GtkLabel#Home_Sensors_MoistAvg_value{
> >       font-family: Segoe UI;
> >       font-weight: lighter;
> >       font-size: 25px;
> > }
> >
> > And this code:
> >
> > static void apply_css(GtkWidget *widget, GtkStyleProvider *provider)
> > {
> > gtk_style_context_add_provider(gtk_widget_get_style_context(widget),
> > GTK_STYLE_PROVIDER(provider),G_MAXUINT);
> >       if(GTK_IS_CONTAINER(widget))
> >           gtk_container_forall(GTK_CONTAINER(widget),(GtkCallback)
> > apply_css,provider);
> >
> > }
> >
> > GFile *file= g_file_new_for_path("custom.css");
> >           GtkStyleProvider *css_provider =
> > GTK_STYLE_PROVIDER(gtk_css_provider_new());
> > gtk_css_provider_load_from_file(GTK_CSS_PROVIDER(css_provider), file,
> > &error);
> > apply_css(gtk_builder_get_object(builder,"window_Main"),css_provider);
> >
> > This is the code used in gtk3-demo and don't works for me.. Why????
> >
> > THanks
> >
> > On 14-03-2017 10:00, Rúben Rodrigues wrote:
> > > Hi guys,
> > >
> > > Finnaly i migrate my application to gtk+3. So, now i neet to change some
> > > things like image background. I used css provider like in this :
> > >
> > > custom.css file:
> > >
> > > GtkLayout:layout_Home{
> > >        background-color: black;
> > > }
> > >
> > >
> > > C Program:
> > >
> > > GFile *file= g_file_new_for_path("custom.css");
> > >            GtkCssProvider *css_provider = gtk_css_provider_get_default();
> > >            gtk_css_provider_load_from_file(css_provider, file, &error);
> > >            GtkStyleContext *context = gtk_style_context_new();
> > >            gtk_style_context_add_provider(context,
> > > GTK_STYLE_PROVIDER(css_provider),GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
> > >
> > > But nothing happens. I tried this too:
> > >
> > > http://stackoverflow.com/questions/7375624/gtk3-window-background-image
> > >
> > >
> > > Someone can help me?
> > >
> > >
> > > THanks
> > >
> > > _______________________________________________
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