#include <Windows.h>
#include <QMainWindow>
#include <QGuiApplication>
#include <QApplication>
#include <QPushButton>
#include <QLayout>
#include <QFrame>
#include <QHBoxLayout>
#include <QVBoxLayout>
#include <QTextEdit>


int main(int argc, char** argv)
{
  QApplication app(argc, argv);
  QMainWindow w;
  auto* f = new QFrame();
  f->setFrameRect(QRect(0, 0, 700, 300));
  auto* vlayout = new QVBoxLayout();
  auto* hlayout = new QHBoxLayout();
  auto* intro = new QTextEdit();
  intro->setMinimumHeight(400);
  auto* text = new QTextEdit();
  intro->insertHtml("<h1>Test program to trigger the problem</h1>"
                    "<p>Pressing 1 will disable button 2 and vice versa; Reset will enable both buttons.</p>"
                    "<p>Usign the keyboard shortcuts alt-1 quickly followed by alt-2 will trigger the bug. "
                    "The \"2\" callback will be called even if the QPushButton 2 has been disabled.</p>"
                    "<p>A workaround is to check btn.isEnabled() at the start of the callback</p>");
  f->setLayout(vlayout);
  vlayout->addWidget(intro, 500);
  vlayout->addLayout(hlayout);
  vlayout->addWidget(text);
  auto* b1 = new QPushButton("&1");
  auto* b2 = new QPushButton("&2");
  auto* b3 = new QPushButton("&Reset");
  QObject::connect(b1, &QPushButton::clicked, [b1, b2, text]
  {
    if (b1->isEnabled())
    {
      text->insertHtml("B1 pushed; <br />");
    }
    else
    {
      text->insertHtml("<b>B1 pushed while disabled!</b>; <br />");
    }
    b2->setEnabled(false);
  });
  QObject::connect(b2, &QPushButton::clicked, [b1, b2, text]
  {
    if (b2->isEnabled())
    {
      text->insertHtml("B2 pushed; <br />");
    }
    else
    {
      text->insertHtml("<b>B2 pushed while disabled!</b>; <br />");
    }
    b1->setEnabled(false);
  });
  QObject::connect(b3, &QPushButton::clicked, [b1, b2, text]
  {
    text->insertHtml("Reset pushed; <br />");
    b1->setEnabled(true);
    b2->setEnabled(true);
  });
  hlayout->addWidget(b1);
  hlayout->addWidget(b2);
  hlayout->addWidget(b3);

  w.setCentralWidget(f);
  w.show();
  return app.exec();
}

//! Windows entry point that calls into ANSI C++ main function.
int CALLBACK WinMain(__in HINSTANCE, __in_opt HINSTANCE, __in LPSTR, __in int)
{
  return main(__argc, __argv);
}