simple example program that adds a signal to a class, connects a handler

2001-03-27  James Henstridge  <james@daa.com.au>

	* examples/gobject/signal.py: simple example program that adds a
	signal to a class, connects a handler to an instance of that
	class, and finally emits that signal.  Messages are printed by
	both the signal handler and class method closure.

	* gobjectmodule.c (pyg_signal_class_closure_marshal): convert
	dashes in signal name to underscores.  Why does g_siganl_name use
	dashes?
	(pyg_signal_class_closure_marshal): fix off by one error when
	setting up the python argument tuple.  The first element was
	getting left uninitialised.  Signals introduced in python now
	work.

	* gtk/gtk.defs (GtkFileSelection.get_filename): return value is
	const.

	* gtk/gtk.override (_wrap_gtk_list_store_set_value): change name.
	(_wrap_gtk_tree_store_insert): change name.

	* gtk/gtk.defs (GtkListStore.set_value): change from set_cell to
	set_value.
	(GtkListStore.set_value): same here.

1 files changed, 20 insertions, 0 deletions

diff --git a/examples/signal.py b/examples/signal.py
new file mode 100644
index 00000000..6fd622d2
--- /dev/null
+++ b/examples/signal.py
@@ -0,0 +1,20 @@
+import ltihooks, ExtensionClass
+import gobject
+
+class C(gobject.GObject):
+    def do_my_signal(self, arg):
+	print "class closure for `my_signal' called with argument", arg
+
+gobject.signal_new("my_signal", C, gobject.SIGNAL_RUN_FIRST,
+		   gobject.TYPE_NONE, (gobject.TYPE_INT, ))
+
+def my_signal_handler(object, arg, *extra):
+    print "handler for `my_signal' called with argument", arg, \
+	  "and extra args", extra
+
+inst = C()
+
+print "instance id 0x%x" % id(inst)
+
+inst.connect("my_signal", my_signal_handler, 1, 2, 3)
+inst.emit("my_signal", 42)