Qt5 icons not showing in Cmake generated executable

Question

I have a Qt5 Project and I'm compiling it with Cmake.

I added a .qr file with the icons.

In QtCreator, I see the icons in Design Mode, but compiling it, it doesn't show them. I tried different changes in Cmake, but I can't find what's wrong. Here is my CMakeLists.txt:

CMAKE_MINIMUM_REQUIRED(VERSION 2.8.11)

PROJECT (UtilityDICOM)

FIND_PACKAGE(Qt5Widgets REQUIRED)

SET(CMAKE_INCLUDE_CURRENT_DIR ON)
SET(CMAKE_AUTOMOC ON)

SET(CMAKE_AUTOUIC ON) # necessary?

SET(UI_FORMS
    View/UI/mainwindow.ui
)

SET(UI_RESOURCES
    View/Resources/iconos.qrc
)

SET(UI_QT_CXX
    mainwindow.cpp
)

SET(UI_MOC_HEADERS
    mainwindow.h
)

QT5_WRAP_CPP(UI_WRAPPED_MOC_HEADERS ${UI_MOC_HEADERS})
QT5_WRAP_UI(UI_FORM_HEADERS ${UI_FORMS})
QT5_ADD_RESOURCES(UI_RESOURCES_RCC ${UI_RESOURCES})


ADD_LIBRARY(ui_qt ${UI_QT_CXX}
    ${UI_WRAPPED_MOC_HEADERS}
    ${UI_FORM_HEADERS} ${UI_RESOURCES_RCC}
)

ADD_EXECUTABLE(UtilityDICOM WIN32 main.cpp)
TARGET_LINK_LIBRARIES(UtilityDICOM
    ui_qt
)
QT5_USE_MODULES(UtilityDICOM Core Gui Widgets)

I also tried adding ${UI_RESOURCES_RCC} in ADD_EXECUTABLE, with same result.

Any ideas? Thank you.

Answer 1

Finally I got it.

In the CMakeLists.txt:

Despite I saw examples where the resources were added inside a TARGET_LINK_LIBRARIES,

I added the resources variable inside the ADD_EXECUTABLE:

ADD_EXECUTABLE(UtilityDICOM WIN32 main.cpp ${UI_RESOURCES_RCC})

after deleting the target folder and generating again, it worked.

Thanks everybody. Maybe this is helpful to other people.

Answer 2

qt uses plugins to handle the image loading.

you application directory should look like

<root>
  -myapplication
  -<imageformats>
    -libq* // the actual image plugin you need (if jpg then 'libqjpeg')

you can find the imageformats under <qt root dir>/plugins/imageformats

cheers