Add xmldoc to SelectionRotationHandler

osu.Game/Screens/Edit/Compose/Components/SelectionRotationHandler.cs

@@ -16,6 +16,18 @@ namespace osu.Game.Screens.Edit.Compose.Components
         /// </summary>
         public Bindable<bool> CanRotate { get; private set; } = new BindableBool();
 
+        /// <summary>
+        /// Performs a single, instant, atomic rotation operation.
+        /// </summary>
+        /// <remarks>
+        /// This method is intended to be used in atomic contexts (such as when pressing a single button).
+        /// For continuous operations, see the <see cref="Begin"/>-<see cref="Update"/>-<see cref="Commit"/> flow.
+        /// </remarks>
+        /// <param name="rotation">Rotation to apply in degrees.</param>
+        /// <param name="origin">
+        /// The origin point to rotate around.
+        /// If the default <see langword="null"/> value is supplied, a sane implementation-defined default will be used.
+        /// </param>
         public void Rotate(float rotation, Vector2? origin = null)
         {
             Begin();
@@ -23,14 +35,48 @@ namespace osu.Game.Screens.Edit.Compose.Components
             Commit();
         }
 
+        /// <summary>
+        /// Begins a continuous rotation operation.
+        /// </summary>
+        /// <remarks>
+        /// This flow is intended to be used when a rotation operation is made incrementally (such as when dragging a rotation handle or slider).
+        /// For instantaneous, atomic operations, use the convenience <see cref="Rotate"/> method.
+        /// </remarks>
         public virtual void Begin()
         {
         }
 
+        /// <summary>
+        /// Updates a continuous rotation operation.
+        /// Must be preceded by a <see cref="Begin"/> call.
+        /// </summary>
+        /// <remarks>
+        /// <para>
+        /// This flow is intended to be used when a rotation operation is made incrementally (such as when dragging a rotation handle or slider).
+        /// As such, the values of <paramref name="rotation"/> and <paramref name="origin"/> supplied should be relative to the state of the objects being rotated
+        /// when <see cref="Begin"/> was called, rather than instantaneous deltas.
+        /// </para>
+        /// <para>
+        /// For instantaneous, atomic operations, use the convenience <see cref="Rotate"/> method.
+        /// </para>
+        /// </remarks>
+        /// <param name="rotation">Rotation to apply in degrees.</param>
+        /// <param name="origin">
+        /// The origin point to rotate around.
+        /// If the default <see langword="null"/> value is supplied, a sane implementation-defined default will be used.
+        /// </param>
         public virtual void Update(float rotation, Vector2? origin = null)
         {
         }
 
+        /// <summary>
+        /// Ends a continuous rotation operation.
+        /// Must be preceded by a <see cref="Begin"/> call.
+        /// </summary>
+        /// <remarks>
+        /// This flow is intended to be used when a rotation operation is made incrementally (such as when dragging a rotation handle or slider).
+        /// For instantaneous, atomic operations, use the convenience <see cref="Rotate"/> method.
+        /// </remarks>
         public virtual void Commit()
         {
         }