signal createQmlObjectFromUrlFinished(variant object,string error)
    //signal createQmlObjectFromUrlProgress(real progress)
    function createQmlObjectFromUrl(url,p){
        var component = Qt.createComponent(url);
        // 异步动态创建大对象
        var incubator = component.incubateObject(p);
        if(typeof incubator != 'undefine') {
            if (incubator.status != Component.Ready) {
                incubator.onStatusChanged = function(status) {
                    if (status == Component.Ready) {
                        console.debug("Object", incubator.object, "is now ready!");
                        createQmlObjectFromUrlFinished(incubator.object,"");
                    }
                    console.debug("status : ",status);
                }
            }
        } else {
            createQmlObjectFromUrlFinished(null,component.errorString);
        }
    }

    function __createExample(exampleName){
        var elementUrl = String("demo/"+exampleName+"/"+exampleName+".qml");
        var e;
        elementUrl = Qt.resolvedUrl(elementUrl);
        console.debug("will create ",exampleName, " from :",elementUrl);
        var object = FlatGlobal.createQmlObjectFromUrl(elementUrl,0);
        // var object = FlatGlobal.createQmlObjectFromUrl(elementUrl,window);
        FlatGlobal.createQmlObjectFromUrlFinished.connect(function(object,error){
            // 只做一次
            FlatGlobal.createQmlObjectFromUrlFinished.disconnect(arguments.callee);
            console.debug("typeof object",typeof object);
            if(typeof object == 'undefine'){
                return;
            }
            object.x = window.x + 50;
            object.y = window.y + 50;
            object.show();
        });
    }

DirectShowPlayerService::doRender: Unresolved error code ****