#include <gtk/gtk.h>
#include <cairo.h>

static gboolean
expose_event (GtkWidget      *widget,
              GdkEventExpose *event)
{
    cairo_t *cr;
    GdkRectangle rect = {-25, 11, 244, 352};
    GdkColor *color;
    double dash_len = 1.;

    cr = gdk_cairo_create (event->window);

    color = &widget->style->base[GTK_STATE_SELECTED];
    cairo_set_source_rgba (cr, 68./255, 137./255, 202./255, 1 / 3.);

    gdk_cairo_rectangle (cr, &rect);
    cairo_fill (cr);

    cairo_set_dash (cr, &dash_len, 1, .5);
    cairo_set_line_width (cr, 1.);
    gdk_cairo_set_source_color (cr, color);
    cairo_rectangle (cr,
                     rect.x + .5,
                     rect.y + .5,
                     rect.width - 1,
                     rect.height - 1);
    cairo_stroke (cr);

    cairo_destroy (cr);

    return TRUE;
}

int main (void)
{
    GtkWidget *window;

    gtk_init (NULL, NULL);

    window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
    gtk_window_resize (GTK_WINDOW (window), 300, 300);
    gtk_widget_show (window);
    g_signal_connect (window, "expose-event", G_CALLBACK (expose_event), NULL);
    g_signal_connect (window, "destroy", G_CALLBACK (gtk_main_quit), NULL);

    gtk_main ();
    return 0;
}