Added Value.Create.

all_test.go

@@ -558,6 +558,14 @@ var tests = []struct {
 		Done:    func(d *TestData) { d.compinst.Call("log", d.compinst) },
 		DoneLog: "Width is 300",
 	},
+	{
+		Summary: "Create a QML-defined component in Go",
+		QML:     `Item { property var comp: Component { Rectangle { width: 300 } } }`,
+		Done:    func(d *TestData) {
+			rect := d.compinst.Field("comp").(*qml.Value).Create(nil)
+			d.Assert(rect.Field("width"), Equals, float64(300))
+		},
+	},
 }
 
 var tablef = flag.String("tablef", "", "if provided, TestTable only runs tests with a summary matching the regexp")

cpp/capi.cpp

@@ -107,6 +107,9 @@ QObject_ *componentCreate(QQmlComponent_ *component, QQmlContext_ *context)
     QQmlComponent *qcomponent = reinterpret_cast<QQmlComponent *>(component);
     QQmlContext *qcontext = reinterpret_cast<QQmlContext *>(context);
 
+    if (!qcontext) {
+        qcontext = qmlContext(qcomponent);
+    }
     return qcomponent->create(qcontext);
 }
 

qml.go

@@ -334,6 +334,20 @@ func (o *commonObject) Call(method string, params ...interface{}) interface{} {
 	return unpackDataValue(&result, o.engine)
 }
 
+func (o *commonObject) Create(context *Context) *Value {
+	// TODO Fail if o does not represent a component.
+	var value Value
+	value.engine = o.engine
+	gui(func() {
+		ctxaddr := nilPtr
+		if context != nil {
+			ctxaddr = context.addr
+		}
+		value.addr = C.componentCreate(o.addr, ctxaddr)
+	})
+	return &value
+}
+
 // Destroy finalizes the value and releases any resources used.
 // The value must not be used after calling this method.
 func (o *commonObject) Destroy() {