mainwindow.cpp Example File

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  ** Copyright (C) 2016 The Qt Company Ltd.
  ** Contact: https://www.qt.io/licensing/
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  ** This file is part of the QtScxml module of the Qt Toolkit.
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  #include "mainwindow.h"
  #include "ui_mainwindow.h"

  #include <QStringListModel>
  #include <QScxmlStateMachine>

  QT_USE_NAMESPACE

  MainWindow::MainWindow(QScxmlStateMachine *machine, QWidget *parent) :
      QWidget(parent),
      ui(new Ui::MainWindow),
      m_machine(machine)
  {
      ui->setupUi(this);

      connect(ui->digit0, &QAbstractButton::clicked, [this] {
          m_machine->submitEvent("DIGIT.0");
      });
      connect(ui->digit1, &QAbstractButton::clicked, [this] {
          m_machine->submitEvent("DIGIT.1");
      });
      connect(ui->digit2, &QAbstractButton::clicked, [this] {
          m_machine->submitEvent("DIGIT.2");
      });
      connect(ui->digit3, &QAbstractButton::clicked, [this] {
          m_machine->submitEvent("DIGIT.3");
      });
      connect(ui->digit4, &QAbstractButton::clicked, [this] {
          m_machine->submitEvent("DIGIT.4");
      });
      connect(ui->digit5, &QAbstractButton::clicked, [this] {
          m_machine->submitEvent("DIGIT.5");
      });
      connect(ui->digit6, &QAbstractButton::clicked, [this] {
          m_machine->submitEvent("DIGIT.6");
      });
      connect(ui->digit7, &QAbstractButton::clicked, [this] {
          m_machine->submitEvent("DIGIT.7");
      });
      connect(ui->digit8, &QAbstractButton::clicked, [this] {
          m_machine->submitEvent("DIGIT.8");
      });
      connect(ui->digit9, &QAbstractButton::clicked, [this] {
          m_machine->submitEvent("DIGIT.9");
      });
      connect(ui->point, &QAbstractButton::clicked, [this] {
          m_machine->submitEvent("POINT");
      });
      connect(ui->operPlus, &QAbstractButton::clicked, [this] {
          m_machine->submitEvent("OPER.PLUS");
      });
      connect(ui->operMinus, &QAbstractButton::clicked, [this] {
          m_machine->submitEvent("OPER.MINUS");
      });
      connect(ui->operStar, &QAbstractButton::clicked, [this] {
          m_machine->submitEvent("OPER.STAR");
      });
      connect(ui->operDiv, &QAbstractButton::clicked, [this] {
          m_machine->submitEvent("OPER.DIV");
      });
      connect(ui->equals, &QAbstractButton::clicked, [this] {
          m_machine->submitEvent("EQUALS");
      });
      connect(ui->c, &QAbstractButton::clicked, [this] {
          m_machine->submitEvent("C");
      });

      connect(m_machine, &QScxmlStateMachine::eventOccurred, [this](const QScxmlEvent &event) {
          if (event.name() == QLatin1String("updateDisplay")) {
              const QString display = event.data().toMap().value("display").toString();
              ui->display->setText(display);
          }
      });
  }

  MainWindow::~MainWindow()
  {
      delete ui;
  }