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#include <gtk/gtk.h>
static GtkWidget *
create_level_bar (void)
{
GtkWidget *bar;
bar = gtk_level_bar_new ();
gtk_level_bar_set_min_value (GTK_LEVEL_BAR (bar), 0.0);
gtk_level_bar_set_max_value (GTK_LEVEL_BAR (bar), 10.0);
gtk_level_bar_add_offset_value (GTK_LEVEL_BAR (bar),
GTK_LEVEL_BAR_OFFSET_LOW, 1.0);
gtk_level_bar_add_offset_value (GTK_LEVEL_BAR (bar),
GTK_LEVEL_BAR_OFFSET_HIGH, 9.0);
gtk_level_bar_add_offset_value (GTK_LEVEL_BAR (bar),
"full", 10.0);
gtk_level_bar_add_offset_value (GTK_LEVEL_BAR (bar),
"my-offset", 5.0);
return bar;
}
static void
add_custom_css (void)
{
GtkCssProvider *provider;
const char data[] =
"levelbar block.my-offset {"
" background: magenta;"
"}";
provider = gtk_css_provider_new ();
gtk_css_provider_load_from_data (provider, data, -1);
gtk_style_context_add_provider_for_display (gdk_display_get_default (),
GTK_STYLE_PROVIDER (provider),
GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
}
static gboolean
increase_level (gpointer data)
{
GtkLevelBar *bar = data;
double value;
value = gtk_level_bar_get_value (bar);
value += 0.1;
if (value >= gtk_level_bar_get_max_value (bar))
value = gtk_level_bar_get_min_value (bar);
gtk_level_bar_set_value (bar, value);
return G_SOURCE_CONTINUE;
}
static void
toggle (GtkSwitch *sw, GParamSpec *pspec, GtkLevelBar *bar)
{
if (gtk_switch_get_active (sw))
gtk_level_bar_set_mode (bar, GTK_LEVEL_BAR_MODE_DISCRETE);
else
gtk_level_bar_set_mode (bar, GTK_LEVEL_BAR_MODE_CONTINUOUS);
}
static void
quit_cb (GtkWidget *widget,
gpointer data)
{
gboolean *done = data;
*done = TRUE;
g_main_context_wakeup (NULL);
}
int
main (int argc, char *argv[])
{
GtkWidget *window;
GtkWidget *box;
GtkWidget *bar;
GtkWidget *box2;
GtkWidget *sw;
gboolean done = FALSE;
gtk_init ();
add_custom_css ();
window = gtk_window_new ();
gtk_window_set_default_size (GTK_WINDOW (window), 500, 100);
box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 10);
gtk_widget_set_margin_start (box, 20);
gtk_widget_set_margin_end (box, 20);
gtk_widget_set_margin_top (box, 20);
gtk_widget_set_margin_bottom (box, 20);
bar = create_level_bar ();
gtk_window_set_child (GTK_WINDOW (window), box);
gtk_box_append (GTK_BOX (box), bar);
box2 = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 10);
gtk_box_append (GTK_BOX (box), box2);
gtk_box_append (GTK_BOX (box2), gtk_label_new ("Discrete"));
sw = gtk_switch_new ();
gtk_box_append (GTK_BOX (box2), sw);
g_signal_connect (sw, "notify::active", G_CALLBACK (toggle), bar);
gtk_window_present (GTK_WINDOW (window));
g_signal_connect (window, "destroy", G_CALLBACK (quit_cb), &done);
g_timeout_add (100, increase_level, bar);
while (!done)
g_main_context_iteration (NULL, TRUE);
return 0;
}
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