Header not found in <appName>_qmltyperegistrations.cpp

[firen]

Hello,

in Qt5 I used for a Qt Quick Application the following approach to connect a c++ model with a qml listview:

qmlRegisterType<UserModel>("UserModel",1,0,"UserModel");

Whereby the usermodel.h contained

    Q_OBJECT
    QML_ELEMENT

However, the same approach doesn't work in qt6 and to be honest I don't understand what the exact equivalent in qt6 would be.

Now I am using CMake (seems to be the new standard?) and I have the following CMakeLists.txt (where I changed nothing except the header and cpp files...):

cmake_minimum_required(VERSION 3.21.1)

option(LINK_INSIGHT "Link Qt Insight Tracker library" ON)
option(BUILD_QDS_COMPONENTS "Build design studio components" ON)

project(AppName LANGUAGES CXX)

set(CMAKE_AUTOMOC ON)

find_package(Qt6 6.2 REQUIRED COMPONENTS Core Gui Qml Quick Sql)

if (Qt6_VERSION VERSION_GREATER_EQUAL 6.3)
    qt_standard_project_setup()
endif()

qt_add_executable(<appName> src/main.cpp
  <...Some more cpp and header... >

    src/usermodel.h src/usermodel.cpp
)

qt_add_resources(StockforecastApp "configuration"
    PREFIX "/"
    FILES
        qtquickcontrols2.conf
)


target_link_libraries(AppName PUBLIC
    Qt6::Core
    Qt6::Gui
    Qt6::Qml
    Qt6::Quick
    Qt6::Sql
)


if (BUILD_QDS_COMPONENTS)
    include(${CMAKE_CURRENT_SOURCE_DIR}/qmlcomponents)
endif()

include(${CMAKE_CURRENT_SOURCE_DIR}/qmlmodules)

if (LINK_INSIGHT)
    include(${CMAKE_CURRENT_SOURCE_DIR}/insight)
endif ()

include(GNUInstallDirs)
install(TARGETS AppName 
    BUNDLE DESTINATION .
    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
)

# make IDEs aware of the QML import path
set(QML_IMPORT_PATH ${PROJECT_BINARY_DIR}/qml CACHE PATH
    "Path to the custom QML components defined by the project")

..The header contains again the macros mentioned above. However I get this error:

<pathAndAppName>_qmltyperegistrations.cpp:10:10: fatal error: usermodel.h: No such file or directory
   10 | #include <usermodel.h>
      |          ^~~~~~~~~~~~~

I took a look at the Qt-examples and I foudnd "contactlist" which does in generel the same like I want to do.

The CMakeLists.txt there looks like:

# Copyright (C) 2023 The Qt Company Ltd.
# SPDX-License-Identifier: BSD-3-Clause

cmake_minimum_required(VERSION 3.16)
project(contactlist LANGUAGES CXX)

set(CMAKE_AUTOMOC ON)

if(NOT DEFINED INSTALL_EXAMPLESDIR)
    set(INSTALL_EXAMPLESDIR "examples")
endif()

set(INSTALL_EXAMPLEDIR "${INSTALL_EXAMPLESDIR}/quickcontrols/contactlist")

find_package(Qt6 REQUIRED COMPONENTS Core Gui Quick)

qt_add_executable(contactlistexample WIN32 MACOSX_BUNDLE
    contactmodel.cpp contactmodel.h
    main.cpp
)

qt_add_qml_module(contactlistexample
    URI contactlist
    NO_RESOURCE_TARGET_PATH
    QML_FILES
        "ContactDelegate.ui.qml"
        "ContactDialog.qml"
        "ContactForm.ui.qml"
        "ContactView.ui.qml"
        "SectionDelegate.ui.qml"
        "ContactList.qml"
        "designer/Backend/ContactModel.qml"
)

target_link_libraries(contactlistexample PUBLIC
    Qt6::Core
    Qt6::Gui
    Qt6::Quick
)

install(TARGETS contactlistexample
    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
    LIBRARY DESTINATION "${INSTALL_EXAMPLEDIR}"
)

...So why is this running and my app not?. I guess I need as well qt_add_qml_module but I am not sure. Why should I need now a module and in the past not? What is missing in my CMakeLists.txt? Or is there another error?

Thanks!

[jsulm]

You do not set the include folder where the compiler should search for header files.
See https://cmake.org/cmake/help/latest/command/target_include_directories.html#command:target_include_directories

[firen]

@jsulm thanks!

I just added

target_include_directories(<appName> PUBLIC src)

what works well.