Add GObjectExtManual trait and implement set_property_from_string() there

gstreamer/src/gobject.rs

@@ -0,0 +1,17 @@
+use glib;
+use glib::IsA;
+use glib::translate::{ToGlibPtr, from_glib};
+
+use ffi;
+
+pub trait GObjectExtManualGst {
+    fn set_property_from_str(&self, name: &str, value: &str);
+}
+
+impl<O: IsA<glib::Object>> GObjectExtManualGst for O {
+    fn set_property_from_str(&self, name: &str, value: &str) {
+        unsafe {
+            ffi::gst_util_set_object_arg(self.to_glib_none().0, name.to_glib_none().0, value.to_glib_none().0);
+        }
+    }
+}

gstreamer/src/lib.rs

@@ -61,7 +61,9 @@ pub use tags::*;
 mod element;
 mod bin;
 mod bus;
+mod gobject;
 pub use bin::BinExtManual;
+pub use gobject::GObjectExtManualGst;
 
 mod value;
 pub use value::*;