Added signals

[cl-gtk2.git] / glib / gobject.signals.lisp

diff --git a/glib/gobject.signals.lisp b/glib/gobject.signals.lisp
index 1531f16..8659cd1 100644 (file)
--- a/glib/gobject.signals.lisp
+++ b/glib/gobject.signals.lisp
@@ -4,4 +4,57 @@
   (instance :pointer)
   (detailed-signal :string)
   (closure (:pointer g-closure))
-  (after :boolean))
\ No newline at end of file
+  (after :boolean))
+
+(defcfun g-signal-emitv :void
+  (instance-and-params (:pointer g-value))
+  (signal-id :uint)
+  (detail g-quark)
+  (return-value (:pointer g-value)))
+
+(defcfun g-signal-lookup :uint
+  (name :string)
+  (type g-type))
+
+(defbitfield g-signal-flags
+  :run-first :run-last :run-cleanup :no-recurse :detailed :action :no-hooks)
+
+(defcstruct g-signal-query
+  (signal-id :uint)
+  (signal-name :string)
+  (owner-type g-type)
+  (signal-flags g-signal-flags)
+  (return-type g-type)
+  (n-params :uint)
+  (param-types (:pointer g-type)))
+
+(defcfun g-signal-query :void
+  (signal-id :uint)
+  (query (:pointer g-signal-query)))
+
+(defun unmangle-type (type)
+  (logxor type (ldb (byte 1 0) type)));;subtract the G_SIGNAL_TYPE_STATIC_SCOPE
+
+(defun emit-signal (object signal-name &rest args)
+  (let ((signal-id (g-signal-lookup signal-name (g-type-from-object (pointer object)))))
+    (when (= signal-id 0)
+      (error "Signal ~A not found on object ~A" signal-name object))
+    (with-foreign-object (q 'g-signal-query)
+      (g-signal-query signal-id q)
+      (with-foreign-object (params 'g-value (+ 1 (foreign-slot-value q 'g-signal-query 'n-params)))
+        (set-g-value (mem-aref params 'g-value 0) object (g-type-from-object (pointer object)) :zero-g-value t)
+        (iter (for i from 0 below (foreign-slot-value q 'g-signal-query 'n-params))
+              (for arg in args)
+              (for type = (unmangle-type (mem-aref (foreign-slot-value q 'g-signal-query 'param-types) 'g-type i)))
+              (set-g-value (mem-aref params 'g-value (1+ i)) arg type :zero-g-value t))
+        (with-foreign-object (return-value 'g-value)
+          (g-value-zero return-value)
+          (g-value-init return-value (foreign-slot-value q 'g-signal-query 'return-type))
+          (g-signal-emitv params signal-id signal-name return-value)
+          (prog1 (if (= (foreign-slot-value q 'g-signal-query 'return-type)
+                        +g-type-void+)
+                     (values)
+                     (parse-gvalue return-value))
+            (g-value-unset return-value)
+            (iter (for i from 0 below (foreign-slot-value q 'g-signal-query 'n-params))
+                  (g-value-unset (mem-aref params 'g-value (1+ i))))))))))
\ No newline at end of file