demo2

All of these demos will be preset for the raspberry 'RPI3
but can easily be changed for x86_64 changing and uncommenting one line of code
I also tried this on Manjaro archlinux RPI3

'RPI3
PRAGMA OPTIONS -Wno-write-strings -Wno-pointer-arith -I/usr/include/arm-linux-gnueabihf/qt5 -fPIC

but lets say you want to test on an x86_64
well just comment out the the PRAGMA line for the RPI3

and uncomment the x86_64 PRAGMA line

'x86_64
PRAGMA OPTIONS -Wno-write-strings -Wno-pointer-arith -Wno-deprecated-declarations -fPIC -I/usr/include/x86_64-linux-gnu/qt5  

I like archlinux Manjaro too very cutting edge software versions!

'Manjaro archlinux RPI
PRAGMA OPTIONS -Wno-write-strings -Wno-pointer-arith -I/usr/include/qt5 -fPIC

---

demo2 QT5

dowload the source code

demo2.bac

PRAGMA INCLUDE <QtWidgets/QApplication>    <QtWidgets/QMainWindow> <QtWidgets/QComboBox>   <QtWidgets/QHBoxLayout>  <QtWidgets/QLabel>
PRAGMA LDFLAGS -lQt5Widgets -lQt5Gui -lQt5Core  -lpthread -latomic 
PRAGMA COMPILER g++
'RPI3
PRAGMA OPTIONS -Wno-write-strings -Wno-pointer-arith -I/usr/include/arm-linux-gnueabihf/qt5 -fPIC

'x86_64
'PRAGMA OPTIONS -Wno-write-strings -Wno-pointer-arith -Wno-deprecated-declarations -fPIC -I/usr/include/x86_64-linux-gnu/qt5 

'Manjaro archlinux RPI
'PRAGMA OPTIONS -Wno-write-strings -Wno-pointer-arith -I/usr/include/qt5 -fPIC

OPTION PARSE FALSE





    DECLARE app TYPE QApplication*
    DECLARE window TYPE QMainWindow*
    DECLARE hbox  TYPE QHBoxLayout*
    DECLARE combo  TYPE QComboBox*
    DECLARE label TYPE QLabel*
    DECLARE w  TYPE QWidget*
    'DECLARE  combotext TYPE QString

    app = new QApplication(argc, argv)


    DECLARE  distros = { "Arch", "Xubuntu", "Redhat", "Debian","Mandriva" } TYPE QStringList


    '--- Create a widget instead of a window
    w = new QWidget()
    hbox = new QHBoxLayout()

    combo = new QComboBox()
    combo->addItems(distros)


    hbox->addWidget(combo)
    hbox->addSpacing(15)

    label = new QLabel("Arch")
    hbox->addWidget(label)

    '--- Set the hbox as the layout of the widget
    '--- this fixes having a window and a widget that are not joined
    w->setLayout(hbox )


   QObject::connect(combo, qOverload<const QString &>(&QComboBox::activated),label, &QLabel::setText)



   w->resize(350, 150)
   w->setWindowTitle("Qcombox demo")
   w->show()
   return app->exec()