use Pad builders for optional name definition

Also, apply auto-naming in the following cases

* When building from a non wildcard-named template, the name of the template is
  automatically assigned to the Pad. User can override with a specific name by
  calling `name()` on the `PadBuilder`.
* When building with a target and no name was provided via the above, the
  GhostPad is named after the target.

See https://gitlab.freedesktop.org/gstreamer/gstreamer-rs/-/issues/448
Auto-naming discussion: https://gitlab.freedesktop.org/gstreamer/gstreamer-rs/-/merge_requests/1255#note_1891181

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests/1197>

1 files changed, 2 insertions, 5 deletions

diff --git a/video/gtk4/examples/gtksink.rs b/video/gtk4/examples/gtksink.rs
index 77855af75..2346a8cd3 100644
--- a/video/gtk4/examples/gtksink.rs
+++ b/video/gtk4/examples/gtksink.rs
@@ -48,11 +48,8 @@ fn create_ui(app: &gtk::Application) {
         sink.add(&gtksink).unwrap();
         convert.link(&gtksink).unwrap();
 
-        sink.add_pad(
-            &gst::GhostPad::with_target(Some("sink"), &convert.static_pad("sink").unwrap())
-                .unwrap(),
-        )
-        .unwrap();
+        sink.add_pad(&gst::GhostPad::with_target(&convert.static_pad("sink").unwrap()).unwrap())
+            .unwrap();
 
         (src, sink.upcast())
     };