Added support for discovering signals on the type info.

src/net/Qt.NetCore.Tests/Types/NetTypeManagerTests.cs

@@ -130,6 +130,25 @@ namespace Qt.NetCore.Tests.Types
             property.ParentType.ClassName.Should().Be("TestType6");
         }
 
+        [Signal("testSignal", NetVariantType.DateTime, NetVariantType.Object)]
+        public class TestType7
+        {
+            
+        }
+        
+        [Fact]
+        public void Can_get_signal()
+        {
+            var type = NetTypeManager.GetTypeInfo<TestType7>();
+
+            type.SignalCount.Should().Be(1);
+            var signal = type.GetSignal(0);
+            signal.Name.Should().Be("testSignal");
+            signal.ParameterCount.Should().Be(2);
+            signal.GetParameter(0).Should().Be(NetVariantType.DateTime);
+            signal.GetParameter(1).Should().Be(NetVariantType.Object);
+        }
+
         [Fact]
         public void Null_type_returned_for_invalid_type()
         {

src/net/Qt.NetCore/Internal/DefaultCallbacks.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using System.Reflection;
 using System.Runtime.InteropServices;
 using Qt.NetCore.Qml;
@@ -81,6 +82,18 @@ namespace Qt.NetCore.Internal
                         type.AddProperty(property);
                     }
                 }
+
+                foreach (var signalAttribute in typeInfo.GetCustomAttributes().OfType<SignalAttribute>())
+                {
+                    using (var signal = new NetSignalInfo(signalAttribute.Name))
+                    {
+                        foreach (var parameter in signalAttribute.Parameters)
+                        {
+                            signal.AddParameter(parameter);
+                        }
+                        type.AddSignal(signal);
+                    }
+                }
             }
         }
 

src/net/Qt.NetCore/SignalAttribute.cs

@@ -0,0 +1,18 @@
+using System;
+
+namespace Qt.NetCore
+{
+    public class SignalAttribute : Attribute
+    {
+        public SignalAttribute(string name, params NetVariantType[] parameters)
+        {
+            Name = name;
+            Parameters = parameters;
+        }
+        
+        
+        public string Name { get; }
+        
+        public NetVariantType[] Parameters { get; }
+    }
+}