Don't hardcode the background colour

It can be now overriden in the user's gtk.css.

2 files changed, 9 insertions, 4 deletions

diff --git a/fastiv-view.c b/fastiv-view.c
index edddeb4..01187b8 100644
--- a/fastiv-view.c
+++ b/fastiv-view.c
@@ -116,12 +116,10 @@ fastiv_view_draw(GtkWidget *widget, cairo_t *cr)
 	 || !gtk_cairo_should_draw_window(cr, gtk_widget_get_window(widget)))
 		return TRUE;
 
-	// TODO(p): Make this adjustable later.
-	cairo_set_source_rgb(cr, 0, 0, 0);
-	cairo_paint(cr);
-
 	GtkAllocation allocation;
 	gtk_widget_get_allocation(widget, &allocation);
+	gtk_render_background(gtk_widget_get_style_context(widget), cr,
+		0, 0, allocation.width, allocation.height);
 
 	int w = get_display_width(self);
 	int h = get_display_height(self);
@@ -180,6 +178,7 @@ fastiv_view_class_init(FastivViewClass *klass)
 
 	// TODO(p): Later override "screen_changed", recreate Pango layouts there,
 	// if we get to have any, or otherwise reflect DPI changes.
+	gtk_widget_class_set_css_name(widget_class, "fastiv-view");
 }
 
 static void
diff --git a/fastiv.c b/fastiv.c
index 7aa5b4b..f110274 100644
--- a/fastiv.c
+++ b/fastiv.c
@@ -425,6 +425,12 @@ main(int argc, char *argv[])
 
 	gtk_window_set_default_icon_name(PROJECT_NAME);
 
+	const char *style = "fastiv-view { background: black; }";
+	GtkCssProvider *provider = gtk_css_provider_new();
+	gtk_css_provider_load_from_data(provider, style, strlen(style), NULL);
+	gtk_style_context_add_provider_for_screen(gdk_screen_get_default(),
+		GTK_STYLE_PROVIDER(provider), GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
+
 	g.view = g_object_new(FASTIV_TYPE_VIEW, NULL);
 	g.window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 	g_signal_connect(g.window, "destroy", G_CALLBACK(gtk_main_quit), NULL);