Display a editor gizmo icon for Listener3D

The icon was present in `editor/icons/`, but it was never implemented
in the editor gizmos code.

This also removes some unused gizmo drawing code (overridden methods
that are no longer called anywhere).

4 files changed, 37 insertions, 2 deletions

diff --git a/editor/icons/GizmoListener.svg b/editor/icons/GizmoListener3D.svg
index 9d3ddf8b85..9d3ddf8b85 100644
--- a/editor/icons/GizmoListener.svg
+++ b/editor/icons/GizmoListener3D.svg
diff --git a/editor/plugins/node_3d_editor_gizmos.cpp b/editor/plugins/node_3d_editor_gizmos.cpp
index e61571edff..7962d186dc 100644
--- a/editor/plugins/node_3d_editor_gizmos.cpp
+++ b/editor/plugins/node_3d_editor_gizmos.cpp
@@ -1481,8 +1481,6 @@ void Light3DGizmoPlugin::redraw(EditorNode3DGizmo *p_gizmo) {
 	}
 }
 
-//////
-
 //// player gizmo
 AudioStreamPlayer3DGizmoPlugin::AudioStreamPlayer3DGizmoPlugin() {
 	Color gizmo_color = EDITOR_DEF("editors/3d_gizmos/gizmo_colors/stream_player_3d", Color(0.4, 0.8, 1));
@@ -1621,6 +1619,29 @@ void AudioStreamPlayer3DGizmoPlugin::redraw(EditorNode3DGizmo *p_gizmo) {
 
 //////
 
+Listener3DGizmoPlugin::Listener3DGizmoPlugin() {
+	create_icon_material("listener_3d_icon", Node3DEditor::get_singleton()->get_theme_icon("GizmoListener3D", "EditorIcons"));
+}
+
+bool Listener3DGizmoPlugin::has_gizmo(Node3D *p_spatial) {
+	return Object::cast_to<Listener3D>(p_spatial) != nullptr;
+}
+
+String Listener3DGizmoPlugin::get_gizmo_name() const {
+	return "Listener3D";
+}
+
+int Listener3DGizmoPlugin::get_priority() const {
+	return -1;
+}
+
+void Listener3DGizmoPlugin::redraw(EditorNode3DGizmo *p_gizmo) {
+	const Ref<Material> icon = get_material("listener_3d_icon", p_gizmo);
+	p_gizmo->add_unscaled_billboard(icon, 0.05);
+}
+
+//////
+
 Camera3DGizmoPlugin::Camera3DGizmoPlugin() {
 	Color gizmo_color = EDITOR_DEF("editors/3d_gizmos/gizmo_colors/camera", Color(0.8, 0.4, 0.8));
 
diff --git a/editor/plugins/node_3d_editor_gizmos.h b/editor/plugins/node_3d_editor_gizmos.h
index 415ed5da5c..5dace06cd7 100644
--- a/editor/plugins/node_3d_editor_gizmos.h
+++ b/editor/plugins/node_3d_editor_gizmos.h
@@ -249,6 +249,19 @@ public:
 	AudioStreamPlayer3DGizmoPlugin();
 };
 
+class Listener3DGizmoPlugin : public EditorNode3DGizmoPlugin {
+	GDCLASS(Listener3DGizmoPlugin, EditorNode3DGizmoPlugin);
+
+public:
+	bool has_gizmo(Node3D *p_spatial) override;
+	String get_gizmo_name() const override;
+	int get_priority() const override;
+
+	void redraw(EditorNode3DGizmo *p_gizmo) override;
+
+	Listener3DGizmoPlugin();
+};
+
 class Camera3DGizmoPlugin : public EditorNode3DGizmoPlugin {
 	GDCLASS(Camera3DGizmoPlugin, EditorNode3DGizmoPlugin);
 
diff --git a/editor/plugins/node_3d_editor_plugin.cpp b/editor/plugins/node_3d_editor_plugin.cpp
index be5d756444..875474253d 100644
--- a/editor/plugins/node_3d_editor_plugin.cpp
+++ b/editor/plugins/node_3d_editor_plugin.cpp
@@ -6863,6 +6863,7 @@ void Node3DEditor::_register_all_gizmos() {
 	add_gizmo_plugin(Ref<Camera3DGizmoPlugin>(memnew(Camera3DGizmoPlugin)));
 	add_gizmo_plugin(Ref<Light3DGizmoPlugin>(memnew(Light3DGizmoPlugin)));
 	add_gizmo_plugin(Ref<AudioStreamPlayer3DGizmoPlugin>(memnew(AudioStreamPlayer3DGizmoPlugin)));
+	add_gizmo_plugin(Ref<Listener3DGizmoPlugin>(memnew(Listener3DGizmoPlugin)));
 	add_gizmo_plugin(Ref<MeshInstance3DGizmoPlugin>(memnew(MeshInstance3DGizmoPlugin)));
 	add_gizmo_plugin(Ref<OccluderInstance3DGizmoPlugin>(memnew(OccluderInstance3DGizmoPlugin)));
 	add_gizmo_plugin(Ref<SoftBody3DGizmoPlugin>(memnew(SoftBody3DGizmoPlugin)));