* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include <math.h>
cairo_fill (cr);
}
-static void
-draw (cairo_t *cr,
- int width,
- int height)
+static gboolean
+on_draw (GtkWidget *widget,
+ cairo_t *cr)
{
cairo_surface_t *overlay, *punch, *circles;
cairo_t *overlay_cr, *punch_cr, *circles_cr;
/* Fill the background */
+ int width = gtk_widget_get_allocated_width (widget);
+ int height = gtk_widget_get_allocated_height (widget);
double radius = 0.5 * (width < height ? width : height) - 10;
double xc = width / 2.;
double yc = height / 2.;
overlay = cairo_surface_create_similar (cairo_get_target (cr),
- CAIRO_FORMAT_ARGB32,
+ CAIRO_CONTENT_COLOR_ALPHA,
width, height);
- if (overlay == NULL)
- return;
punch = cairo_surface_create_similar (cairo_get_target (cr),
- CAIRO_FORMAT_A8,
+ CAIRO_CONTENT_ALPHA,
width, height);
- if (punch == NULL)
- return;
circles = cairo_surface_create_similar (cairo_get_target (cr),
- CAIRO_FORMAT_ARGB32,
+ CAIRO_CONTENT_COLOR_ALPHA,
width, height);
- if (circles == NULL)
- return;
fill_checks (cr, 0, 0, width, height);
cairo_surface_destroy (overlay);
cairo_surface_destroy (punch);
cairo_surface_destroy (circles);
-}
-
-static gboolean
-on_expose_event (GtkWidget *widget,
- GdkEventExpose *event,
- gpointer data)
-{
- cairo_t *cr;
-
- cr = gdk_drawable_create_cairo_context (widget->window);
-
- draw (cr, widget->allocation.width, widget->allocation.height);
-
- cairo_destroy (cr);
return FALSE;
}
darea = gtk_drawing_area_new ();
gtk_container_add (GTK_CONTAINER (window), darea);
- g_signal_connect (darea, "expose-event",
- G_CALLBACK (on_expose_event), NULL);
+ g_signal_connect (darea, "draw",
+ G_CALLBACK (on_draw), NULL);
g_signal_connect (window, "destroy-event",
G_CALLBACK (gtk_main_quit), NULL);