hello.c -------------------------------------------------------------------------

#include <iostream>

#include <Wt/WBreak>
#include <Wt/WContainerWidget>
#include <Wt/WLineEdit>
#include <Wt/WPushButton>
#include <Wt/WText>

#include "HelloApplication.h"
#include "QtObject.h"

// Needed when using WQApplication with Qt eventloop = true
#include <QCoreApplication>

using namespace Wt;

HelloApplication::HelloApplication(const WEnvironment& env)
  : WQApplication(env, true)
{
  /*
   * Note: do not create any Qt objects from here. Initialize your
   * application from within the virtual create() method.
   */
}

void HelloApplication::create()
{
  setTitle("Hello world");

  root()->addWidget(new WText("Your name, please ? "));
  nameEdit_ = new WLineEdit(root());
  nameEdit_->setFocus();

  WPushButton *b = new WPushButton("Greet me.", root());
  b->setMargin(5, Left);

  root()->addWidget(new WBreak());

  greeting_ = new WText(root());

  b->clicked().connect(this, &HelloApplication::propagateGreet);
  nameEdit_->enterPressed().connect(this, &HelloApplication::propagateGreet);

  qtSender_ = new QtObject(this);
  qtReceiver_ = new QtObject(this);

  QObject::connect(qtSender_, SIGNAL(greet(const QString&)),
           qtReceiver_, SLOT(doGreet(const QString&)));
}

void HelloApplication::destroy()
{
  /*
   * Note: Delete any Qt object from here.
   */
  delete qtSender_;
  delete qtReceiver_;
}

void HelloApplication::propagateGreet()
{
  qtSender_->passGreet(toQString(nameEdit_->text()));
}

void HelloApplication::doGreet(const QString& qname)
{
  greeting_->setText("Hello there, " + toWString(qname));
}

WApplication *createApplication(const WEnvironment& env)
{
  return new HelloApplication(env);
}

int main(int argc, char **argv)
{
  // Needed for Qt's eventloop threads to work
  QCoreApplication app(argc, argv);

  return WRun(argc, argv, &createApplication);
}

helloapplication.h -------------------------------------------------------------------------

#ifndef HELLO_APPLICATION_H_
#define HELLO_APPLICATION_H_

#include "WQApplication"

class QtObject;
class QString;

using namespace Wt;

namespace Wt {
  class WLineEdit;
  class WText;
}

/*! \class HelloApplication
 *  \brief The 'hello' application modified to use QtCore
 *
 * A sample application that uses objects from the QtCore library.
 */
class HelloApplication : public WQApplication
{
public:
  HelloApplication(const WEnvironment& env);

  void doGreet(const QString&);

  virtual void create();
  virtual void destroy();

private:
  WLineEdit *nameEdit_;
  WText     *greeting_;

  QtObject  *qtSender_, *qtReceiver_;

  void propagateGreet();
};

#endif // HELLO_APPLICATION_H_

qtobject.h -------------------------------------------------------------------------

#ifndef QTOBJECT_H_
#define QTOBJECT_H_

#include <QThread>

class HelloApplication;

class QtObject : public QObject
{
  Q_OBJECT

public:
  QtObject(HelloApplication *wt_, QObject *parent = 0);

  void passGreet(const QString&);

Q_SIGNALS:
  void greet(const QString&);

public Q_SLOTS:
  void doGreet(const QString&);
  void doShit();

private:
  HelloApplication *wt_;
};

#endif // QTOBJECT_H_