Error creating a QQmlComponent (resource not found)

jonyAL

Hi everyone.

I am having several problems porting a quick application from Android to Desktop.
In this process I must to change from .pro to CMakeLists.txt (I am working on ROS and I need to define a CMakeLists.txt).

The problem is that I cant find the resources files when I try to compile with cmake. However I have not problems when I use the .pro file.

My system files:

|- Project
    |- CMakeLists.txt
    |- src/
        |- main.cpp
        |- ...
    |- resources/
        |- main.qml
        |- qml.qrc
    |- ...

The CMakeLists.txt contains:

[...]
set(CMAKE_AUTOMOC ON)
set(CMAKE_INCLUDE_CURRENT_DIR ON)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
set(QRC_RESOURCES ${CMAKE_CURRENT_SOURCE_DIR}/resources/qml.qrc)
[...]

In the Andoid version (working properly), i had put in my .pro:

[...]
RESOURCES += resources/qml.qrc
[...]

The .qrc file:

<RCC>
    <qresource prefix="/">
        <file>main.qml</file>
    </qresource>
</RCC>

And finally, in my code:

QQmlComponent component(&engine, QUrl(QStringLiteral("qrc:/main.qml")));

The execution error is:

(qrc:/main.qml: File not found)

How do I to find the resouces files with cmake compilation?

Thank you so much,
jonyAL

SGaist

Hi and welcome to devnet,

Did you already check the cmake manual from Qt's documentation ?

treaves

With cmake, there are three things you do (or at lest I do) to get the resources added.

SET(PROJECT_RESOURCES
    ../resources/resources.qrc
)
qt5_add_resources(PROJECT_RESOURCES_CXX ${PROJECT_RESOURCES})

add_executable(${PROJECT_NAME} ${${PROJECT_NAME}_SOURCE} ${PROJECT_RESOURCES_CXX})

So you :

create the variable to hold the src file
use the qt5_add_resources macro
add the files from the qt5_add_resources macro to your executable (or library), as you would other sources.

Hope this helps.

treaves

Also, please add the cmake tag to this post; I don't think a responder can.

jonyAL

I solved this problem.

I just added this lines in my CMakeLists.txt

qt5_add_resources(QT_RESOURCES_CPP resources/qml.qrc)

add_executable(my_app
                 src/my_app.cpp src/my_app.h ${QT_RESOURCES_CPP})

target_link_libraries(my_app
                        lib1
                        lib2
                        ...)

The problem was that I was adding my reference to QT_RESOURCES_CPP in the target_link_libraries(...) instead of add_executable(...). For some reason this didn't work properly.

Thank you,
Jonatan