initial commit: canny cat basic movement, bouncing, some gridmap tiles for levels

addons/godot_state_charts/csharp/CompoundState.cs

@@ -0,0 +1,66 @@
+
+
+// ReSharper disable once CheckNamespace
+namespace GodotStateCharts
+{
+    using System;
+    using Godot;
+    
+    /// <summary>
+    /// Wrapper around the compound state node.
+    /// </summary>
+    public class CompoundState : StateChartState
+    {
+        /// <summary>
+        /// Called when a child state is entered.
+        /// </summary>
+        public event Action ChildStateEntered
+        {
+            add => Wrapped.Connect(SignalName.ChildStateEntered, Callable.From(value));
+            remove => Wrapped.Disconnect(SignalName.ChildStateEntered, Callable.From(value));
+        }
+        
+        /// <summary>
+        /// Called when a child state is exited.
+        /// </summary>
+        public event Action ChildStateExited
+        {
+            add => Wrapped.Connect(SignalName.ChildStateExited, Callable.From(value));
+            remove => Wrapped.Disconnect(SignalName.ChildStateExited, Callable.From(value));
+        }
+        
+        private CompoundState(Node wrapped) : base(wrapped)
+        {
+        }
+
+        /// <summary>
+        /// Creates a wrapper object around the given node and verifies that the node
+        /// is actually a compound state. The wrapper object can then be used to interact
+        /// with the compound state chart from C#.
+        /// </summary>
+        /// <param name="state">the node that is the state</param>
+        /// <returns>a State wrapper.</returns>
+        /// <throws>ArgumentException if the node is not a state.</throws>
+        public new static CompoundState Of(Node state)
+        {
+            if (state.GetScript().As<Script>() is not GDScript gdScript ||
+                !gdScript.ResourcePath.EndsWith("compound_state.gd"))
+            {
+                throw new ArgumentException("Given node is not a compound state.");
+            }
+
+            return new CompoundState(state);
+        }
+
+        public new class SignalName : StateChartState.SignalName
+        {
+  
+            /// <see cref="CompoundState.ChildStateEntered"/>
+            public static readonly StringName ChildStateEntered = "child_state_entered";
+
+            /// <see cref="CompoundState.ChildStateExited"/>
+            public static readonly StringName ChildStateExited = "child_state_exited";
+
+        }
+    }
+}