MyQuickItem gets loaded twice on accessing its object in main.cpp

Nelson_Piquet

Hi Guys: I have a QtApp which many quick items in qml files. One of quick items is MyQuickItem which is embedded in qml/pages/SomePage.qml. MYQuickItem has a function I need to set some data into & I am trying to get a valid instance to MyQuickItem. I get a instance by doing the following in my main.cpp but the problem is that the constructor of MyQuickItem gets called twice because view.setSource & engine.load both called in main.cpp.

My main.cpp

int main(int argc, char *argv[]) 
{
  QQmlApplicationEngine engine;
  qmlRegisterType<MyQuickItem>("MyQuickItem", 1, 0, "MyQuickItem");
  QQuickView view;
  //Mainpage.qml is where MyQuickItem is located. Its sort of a child page of main.qml 
  view.setSource(QUrl(QStringLiteral("qrc:/qml/pages/MainPage.qml")));
  QObject *object = view.rootObject();
  QObject *rect = object->findChild<QObject*>("myQuickItem"); 
  MyQuickItem* quickItem = qobject_cast<MyQuickItem*>(rect);
  quickItem->SetCppObject(theCppObject);
  engine.load(QUrl(QStringLiteral("qrc:/qml/main.qml")));
  return app.exec();
}

My MainPage.qml

import MyQuickItem 1.0

MyQuickItem {
  id: myQuickItemID
  visible: true
  objectName: "myQuickItem"
}

MyQuickItem.h

class MyQuickItem : public QQuickItem {
  MyQuickItem();
  SetCppObject(MyCppLibApiClass cppObject);
  MyCppLibApiClass m_cppObject;
}

Can you please suggest how I can get a valid instance to MyQuickItem without creating it anew & thus avoid MyQuickItem's constructor getting called twice?

Nelson_Piquet

I got this working by doing the followind way of acquiring the quickItem object very much after help from this forum in my previous questions.

QQuickItem *myItem = engine.rootObjects()[0]->findChild<QQuickItem *>("myQuickItem")

SGaist

Hi,

Since you solved the problem, please mark the thread as solved using the "Topic Tools" button so that other forum users may know a solution has been found :)

Nelson_Piquet

surely yes. @p3c0 @SGaist thanks for the support guys