main.cpp

#include <QtGui/QGuiApplication>
#include <QQmlContext>
#include "qtquick2applicationviewer.h"
#include "qgpiowatcher.h"
#include "qgpio.h"
#include <QDebug>
#include <QTimer>
#include <QtQml>
#include "qsoftpwm.h"
int QGpioWatcher::THREAD_SLEEP_TIME = 3000;

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

    QtQuick2ApplicationViewer viewer;
    qmlRegisterType<QGpio>("com.embedded.io",1,0,"QGpio");

    QList<int> inPins;
    inPins << 204 << 199; // CAREFUL TO SUPPLY VALID Input Capable PINS


    QGpioWatcher gpio_thread;
    gpio_thread.start();


    QQmlContext * root_c(viewer.rootContext());
    foreach(const int & pin_number, inPins)
    {
        QGpio * pin_created(gpio_thread.exportPin(pin_number,QGpio::In,QGpio::Both,&app));
        pin_created->setActiveLow(0);
        pin_created->setEdgeType(QGpio::Both);
        if(pin_created) // connect c++ slot
        {
            QObject::connect(pin_created,&QGpio::valueChanged,[=](const bool & new_value){
                qDebug() << "Pin " << pin_created->pinNumber() << "changed value to " << new_value;
            });
            QString pin_name("GPIO");
            pin_name += QString::number(pin_number);
            qDebug() << "Creating context property link" << pin_name;
            root_c->setContextProperty(pin_name, pin_created);
        }
        else
            qDebug() << "Pin "<< pin_number << " is null!";
    }
    // objects must be exposed to qml through QList<QObject*>
    // we must cast a list
    root_c->setContextProperty("GpioList",QVariant::fromValue(gpio_thread.exportedObjects()));
    root_c->setContextProperty("GpioWatcher",&gpio_thread);
    viewer.setMainQmlFile(QStringLiteral("qml/Gpio_Test/main.qml"));
    viewer.showExpanded();
    QObject::connect(&app, &QGuiApplication::aboutToQuit, &gpio_thread, &QThread::terminate);
    int ret_val(app.exec());
    return ret_val;
}