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#include <gtk/gtk.h>
static GtkWidget *
create_level_bar (void)
{
GtkWidget *level_bar;
level_bar = gtk_level_bar_new ();
gtk_level_bar_add_offset_value (GTK_LEVEL_BAR (level_bar),
GTK_LEVEL_BAR_OFFSET_LOW, 0.10);
gtk_level_bar_add_offset_value (GTK_LEVEL_BAR (level_bar),
"my-offset", 0.50);
return level_bar;
}
static void
add_custom_css (void)
{
GtkCssProvider *provider;
const gchar data[] =
".level-bar.fill-block.empty-fill-block.level-my-offset {"
" background-color: transparent;"
" background-image: none;"
" border-color: alpha(@theme_fg_color, 0.1);"
"}"
".level-bar.fill-block.level-my-offset {"
" background-image: linear-gradient(to bottom,"
" shade(magenta,0.9),"
" magenta,"
" shade(magenta,0.85));"
"}";
provider = gtk_css_provider_new ();
gtk_css_provider_load_from_data (provider, data, -1, NULL);
gtk_style_context_add_provider_for_screen (gdk_screen_get_default (),
GTK_STYLE_PROVIDER (provider),
GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
}
static gboolean
increase_level (gpointer data)
{
GtkLevelBar *bar = data;
gdouble value;
value = gtk_level_bar_get_value (bar);
value += 0.01;
if (value >= 1.0)
value = 0.0;
gtk_level_bar_set_value (bar, value);
return G_SOURCE_CONTINUE;
}
int
main (int argc, char *argv[])
{
GtkWidget *window;
GtkWidget *bar;
gtk_init (&argc, &argv);
add_custom_css ();
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_default_size (GTK_WINDOW (window), 500, 100);
bar = create_level_bar ();
g_object_set (bar, "margin", 20, NULL);
gtk_container_add (GTK_CONTAINER (window), bar);
gtk_widget_show_all (window);
g_timeout_add (100, increase_level, bar);
gtk_main ();
return 0;
}
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