Fixed a regression - Qt events did not work at all. Also restored the ability to handle them.

Signed-off-by: Dimitar Dobrev <dpldobrev@protonmail.com>

Author: ddobrev

CHANGELOG

@@ -1,3 +1,7 @@
+0.5.1 - 12.6.2016
+Fixed:
+- Regression - Qt events did not work at all. Also restored the ability to handle them.
+
 0.5.0 - 12.6.2016
 Added:
 - Wrapped the entire Qt.

QtSharp/GenerateEventEventsPass.cs

@@ -38,25 +38,20 @@ where this.events.Contains(block.Declaration)
                 eventBlock.NewLine();
                 const string eventHandler = @"__eventHandler";
                 var raiseEvent = string.Format(
-                    @"    var {0} = {1};
+                    @"var {0} = {1};
     if ({0} != null)
         {0}(this, {2});
-", eventHandler, @event, method.Parameters[0].Name);
+    if ({2}.Handled)
+        return{3};
+",
+                    eventHandler, @event, method.Parameters[0].Name,
+                    method.OriginalReturnType.Type.IsPrimitiveType(PrimitiveType.Void) ? string.Empty : " true");
                 if (block.Blocks.Count > 0 && block.Blocks[0].Kind == BlockKind.BlockComment)
                 {
                     eventBlock.Blocks.Add(block.Blocks[0]);
                 }
                 block.Parent.Blocks.Insert(blockIndex, eventBlock);
-                var stringBuilder = block.Text.StringBuilder;
-                if (method.OriginalReturnType.Type.IsPrimitiveType(PrimitiveType.Void))
-                {
-                    stringBuilder.Insert(stringBuilder.Length - 1 - Environment.NewLine.Length, raiseEvent);
-                }
-                else
-                {
-                    const string @return = "    return ";
-                    stringBuilder.Replace(@return, raiseEvent + @return);
-                }
+                block.Text.StringBuilder.Replace("var __slot", raiseEvent + "    var __slot");
             }
         }
 
@@ -83,6 +78,7 @@ public override bool VisitMethodDecl(Method method)
                         baseMethod.IsPure)
                     {
                         this.events.Add(method);
+                        this.Driver.Options.ExplicitlyPatchedVirtualFunctions.Add(method.QualifiedOriginalName);
                     }
                 }
             }

QtSharp/GenerateSignalEventsPass.cs

@@ -144,6 +144,11 @@ public override bool VisitClassDecl(Class @class)
             {
                 this.HandleQSignal(@class, method);
             }
+            var qtMetaCall = @class.FindMethod("qt_metacall");
+            if (qtMetaCall != null)
+            {
+                this.Driver.Options.ExplicitlyPatchedVirtualFunctions.Add(qtMetaCall.QualifiedOriginalName);
+            }
             return true;
         }
 

QtSharp/QEvent.cs

@@ -0,0 +1,15 @@
+namespace QtCore
+{
+    public partial class QEvent
+    {
+        /// <summary>
+        /// Set to true in order to stop propagating the event to other widgets.
+        /// </summary>
+        /// <remarks>
+        /// It's different to <see cref="Accepted"/> because it's guaranteed to be false by default and
+        /// because setting it on ensures the base event handler is not called.
+        /// See https://doc.qt.io/qt-5.6/eventsandfilters.html#event-handlers and https://doc.qt.io/archives/qq/qq11-events.html#acceptorignore.
+        /// </remarks>
+        public bool Handled { get; set; }
+    }
+}

QtSharp/QtSharp.cs

@@ -265,6 +265,7 @@ public void Setup(Driver driver)
                 {
                     module.CodeFiles.Add(Path.Combine(dir, "QObject.cs"));
                     module.CodeFiles.Add(Path.Combine(dir, "QChar.cs"));
+                    module.CodeFiles.Add(Path.Combine(dir, "QEvent.cs"));
                     module.CodeFiles.Add(Path.Combine(dir, "_iobuf.cs"));
                 }
 
@@ -284,7 +285,6 @@ public void Setup(Driver driver)
             driver.Options.addIncludeDirs(qtInfo.Headers);
 
             driver.Options.addLibraryDirs(Platform.IsWindows ? qtInfo.Bins : qtInfo.Libs);
-            driver.Options.ExplicitlyPatchedVirtualFunctions.Add("qt_metacall");
         }
 
         public static string GetModuleNameFromLibFile(string libFile)

QtSharp/QtSharp.csproj

@@ -76,6 +76,9 @@
     <Compile Include="DocGeneration\MemberDocumentationNode.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="ProcessHelper.cs" />
+    <None Include="QEvent.cs">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
     <Compile Include="RemoveQObjectMembersPass.cs" />
     <None Include="packages.config" />
     <None Include="_iobuf.cs">