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

addons/godot_state_charts/csharp/StateChart.cs

@@ -0,0 +1,129 @@
+// ReSharper disable once CheckNamespace
+
+namespace GodotStateCharts
+{
+    using Godot;
+    using System;
+
+    /// <summary>
+    /// Wrapper around the GDScript state chart node. Allows interacting with the state chart.
+    /// </summary>
+    public class StateChart : NodeWrapper
+    {
+        /// <summary>
+        /// Emitted when the state chart receives an event. This will be 
+        /// emitted no matter which state is currently active and can be 
+        /// useful to trigger additional logic elsewhere in the game 
+        /// without having to create a custom event bus. It is also used
+        /// by the state chart debugger. Note that this will emit the 
+        /// events in the order in which they are processed, which may 
+        /// be different from the order in which they were received. This is
+        /// because the state chart will always finish processing one event
+        /// fully before processing the next. If an event is received
+        /// while another is still processing, it will be enqueued.
+        /// </summary>
+        public event Action<StringName> EventReceived
+        {
+            add => Wrapped.Connect(SignalName.EventReceived, Callable.From(value));
+            remove => Wrapped.Disconnect(SignalName.EventReceived, Callable.From(value));
+        } 
+            
+        protected StateChart(Node wrapped) : base(wrapped)
+        {
+        }
+
+        /// <summary>
+        /// Creates a wrapper object around the given node and verifies that the node
+        /// is actually a state chart. The wrapper object can then be used to interact
+        /// with the state chart from C#.
+        /// </summary>
+        /// <param name="stateChart">the node that is the state chart</param>
+        /// <returns>a StateChart wrapper.</returns>
+        /// <throws>ArgumentException if the node is not a state chart.</throws>
+        public static StateChart Of(Node stateChart)
+        {
+            if (stateChart.GetScript().As<Script>() is not GDScript gdScript
+                || !gdScript.ResourcePath.EndsWith("state_chart.gd"))
+            {
+                throw new ArgumentException("Given node is not a state chart.");
+            }
+
+            return new StateChart(stateChart);
+        }
+
+        /// <summary>
+        /// Sends an event to the state chart node.
+        /// </summary>
+        /// <param name="eventName">the name of the event to send</param>
+        public void SendEvent(string eventName)
+        {
+            Call(MethodName.SendEvent, eventName);
+        }
+
+        /// <summary>
+        /// Sets an expression property on the state chart node for later use with expression guards.
+        /// </summary>
+        /// <param name="name">the name of the property to set. This is case sensitive.</param>
+        /// <param name="value">the value to set the property to.</param>
+        public void SetExpressionProperty(string name, Variant value)
+        {
+            Call(MethodName.SetExpressionProperty, name, value);
+        }
+        
+        
+        /// <summary>
+        /// Returns the value of an expression property on the state chart node.
+        /// </summary>
+        /// <param name="name">the name of the proeprty to read. This is case sensitive. </param>
+        /// <param name="defaultValue">the default value to be returned if no such property exists</param>
+        /// <returns>the value of the property</returns>
+        public T GetExpressionProperty<[MustBeVariant]T>(string name, T defaultValue = default)
+        {
+            return Call(MethodName.GetExpressionProperty, name, Variant.From(defaultValue)).As<T>();
+        }
+
+        /// <summary>
+        /// Steps the state chart node. This will invoke all <code>state_stepped</code> signals on the
+        /// currently active states in the state charts. See the "Stepping Mode" section of the manual
+        /// for more details.
+        /// </summary>
+        public void Step()
+        {
+            Call(MethodName.Step);
+        }
+
+        public class SignalName : Node.SignalName
+        {
+           /// <see cref="StateChart.EventReceived"/>
+           /// 
+           /// </summary>
+            public static readonly StringName EventReceived = "event_received";
+        }
+        
+        public new class MethodName : Node.MethodName
+        {
+            /// <summary>
+            /// Sends an event to the state chart node.
+            /// </summary>
+            public static readonly StringName SendEvent = "send_event";
+            
+            /// <summary>
+            /// Sets an expression property on the state chart node for later use with expression guards.
+            /// </summary>
+            public static readonly StringName SetExpressionProperty = "set_expression_property";
+            
+            /// <summary>
+            /// Returns the value of an expression property on the state chart node.
+            /// </summary>
+            public static readonly StringName GetExpressionProperty = "get_expression_property";
+            
+            /// <summary>
+            /// Steps the state chart node. This will invoke all <code>state_stepped</code> signals on the
+            /// currently active states in the state charts. See the "Stepping Mode" section of the manual
+            /// for more details.
+            /// </summary>
+            public static readonly StringName Step = "step";
+        }
+        
+    }
+}