"is not a type" error when importing custom qml from resource

[Alp Hancioglu]

I have the following directory structure:

ui/
  |- resources.qrc
  |- qml/
      |- main_window.qml
      |- ControlUnitListPresenter.qml

resources.qrc contents:

<RCC>
  <qresource prefix="/">
    <file>qml/ControlUnitListPresenter.qml</file>
    <file>qml/main_window.qml</file>
  </qresource>
</RCC>

main_window.qml contents:

import QtQuick 2.11
import QtQuick.Controls 1.4
import QtQuick.Layouts 1.11

ApplicationWindow {
  visible: true
  visibility: "Maximized"

  menuBar: MenuBar {
    Menu {
      title: "File"
      MenuItem { text: "Open" }
      MenuItem { text: "Save" }
    }
  }

  ControlUnitListPresenter {
  }
}

main.cpp contents:

int main(int argc, char **argv)
{
  QGuiApplication app(argc, argv);

  QQmlApplicationEngine engine;
  engine.load(":/qml/main_window.qml");

  return app.exec();
}

When I run the application I get:

QQmlApplicationEngine failed to load component
file::/qml/main_window.qml:22 ControlUnitListPresenter is not a type

I don't think I need an import statement because they are in the same directory.

[raven-worx]

@Alp-Hancioglu said in "is not a type" error when importing custom qml from resource:

I don't think I need an import statement because they are in the same directory.

not that i am aware of, try add import "."

[Alp Hancioglu]

import "."

gave me

QQmlApplicationEngine failed to load component
file::/qml/main_window.qml:4 import "." has no qmldir and no namespace

By the way I am using meson as build system instead of qmake if it makes any difference. It shouldn't because meson also uses rcc.

[raven-worx]

@Alp-Hancioglu
strange. import "." normally doesn't require a qmldir file.

Try to load load your ui with an QUrl instead of a filepath:

engine.load( QUrl("qrc:/qml/main_window.qml") );

[J.Hilk]

@Alp-Hancioglu said in "is not a type" error when importing custom qml from resource:

meson

I don't have experience with meson, but with qmake, you'll have to rerun qmake after adding a qml file to the ressource file. Because the ressource file is not recreated each time you add or remove components.

[Alp Hancioglu]

@raven-worx

engine.load( QUrl("qrc:/qml/main_window.qml") );

works. There is no need for import. Thanks.

[davidzoe]

I have the same thing as you, there are 2 solutions, 1 is to lower the qt version below 6, the second is to use cmake to compile, it will be successful