Added macro WITH-CARIO-CONTEXT to create temporary cario contexts

diff --git a/gdk/gdk.lisp b/gdk/gdk.lisp
index d3dae2e4c5f6bf04f5a3a457e1d79faca26d9fdf..30c48b9d147477ae8fdb79c92ded8089bcb1c9ae 100644 (file)
--- a/gdk/gdk.lisp
+++ b/gdk/gdk.lisp
@@ -20,7 +20,7 @@
 ;; TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 ;; SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 ;; TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 ;; SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 

-;; $Id: gdk.lisp,v 1.18 2005/11/10 09:01:36 espen Exp $
+;; $Id: gdk.lisp,v 1.19 2006/02/07 13:22:14 espen Exp $

 
 
 (in-package "GDK")
 
 
 (in-package "GDK")


@@ -712,6 +712,13 @@ (progn
   (defbinding cairo-create () cairo:context
     (drawable drawable))
 
   (defbinding cairo-create () cairo:context
     (drawable drawable))
 

+  (defmacro with-cairo-context ((cr drawable) &body body)
+    `(let ((,cr (cairo-create ,drawable)))
+       (unwind-protect
+          (progn ,@body)
+        (unreference-foreign 'cairo:context (foreign-location ,cr))
+        (invalidate-instance ,cr))))
+

   (defbinding cairo-set-source-color () nil
     (cr cairo:context)
     (color color))
   (defbinding cairo-set-source-color () nil
     (cr cairo:context)
     (color color))