CppWtChat1 is an example of a Wt chat application that is as simple as possible, except for showing About information.

Technical facts

Application type(s)

Web application

Operating system(s) or programming environment(s)

Ubuntu 10.10 (maverick)

IDE(s):

Qt Creator 2.0.1

Project type:

Console application

C++ standard:

C++98

Compiler(s):

G++ 4.4.5

Libraries used:

Boost: version 1.42
STL: GNU ISO C++ Library, version 4.4.5
Wt: version 3.1.2

Qt project file: CppWtChat1.pro


#-------------------------------------------------

#

# Project created by QtCreator 2011-04-10T11:16:42

#

#-------------------------------------------------

QT       += core

QT       -= gui

LIBS += -lwt -lwthttp -lboost_program_options

QMAKE_CXXFLAGS += -DNDEBUG

TARGET = CppWtChat1

CONFIG   += console

CONFIG   -= app_bundle

TEMPLATE = app



INCLUDEPATH += \

    ../../Classes/CppAbout \

    ../../Classes/CppWtAboutDialog



SOURCES += wtmain.cpp \

    wtchat1dialog.cpp \

    ../../Classes/CppAbout/about.cpp \

    ../../Classes/CppWtAboutDialog/wtaboutdialog.cpp



HEADERS  += \

    wtchat1dialog.cpp \

    ../../Classes/CppAbout/about.h \

    ../../Classes/CppWtAboutDialog/wtaboutdialog.h

wtchat1dialog.cpp


//---------------------------------------------------------------------------

/*

WtChat, chatting server

Copyright (C) 2011 Richel Bilderbeek



This program is free software: you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation, either version 3 of the License, or

(at your option) any later version.



This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program. If not, see <http://www.gnu.org/licenses/>.

*/

//---------------------------------------------------------------------------

//From http://www.richelbilderbeek.nl/CppWtChat1.htm

//---------------------------------------------------------------------------

#include <fstream>

//---------------------------------------------------------------------------

#include <boost/filesystem.hpp>

#include <boost/foreach.hpp>

//---------------------------------------------------------------------------

#include <Wt/WApplication>

#include <Wt/WBreak>

#include <Wt/WLabel>

#include <Wt/WLineEdit>

#include <Wt/WTextArea>

#include <Wt/WTimer>

//---------------------------------------------------------------------------

#include "about.h"

#include "wtaboutdialog.h"

#include "wtchat1dialog.h"

//---------------------------------------------------------------------------

const std::string WtChat1Dialog::m_chat_filename = "toolwtchat.txt";

//---------------------------------------------------------------------------

WtChat1Dialog::WtChat1Dialog()

{

  this->setContentAlignment(Wt::AlignCenter);

  ShowChat();

}

//---------------------------------------------------------------------------

///FileToVector reads a file and converts it to a std::vector<std::string>

///From http://www.richelbilderbeek.nl/CppFileToVector.htm

const std::vector<std::string> WtChat1Dialog::FileToVector(const std::string& filename)

{

  assert(!boost::filesystem::exists(m_chat_filename));



  std::vector<std::string> v;

  std::ifstream in(filename.c_str());

  std::string s;

  for (int i=0; !in.eof(); ++i)

  {

    std::getline(in,s);

    v.push_back(s);

  }

  return v;

}

//---------------------------------------------------------------------------

const About WtChat1Dialog::GetAbout()

{

  About a(

    "Richel Bilderbeek",

    "WtChat1",

    "very simple chatting server",

    "the 12th of April 2011",

    "2011",

    "http://www.richelbilderbeek.nl/CppWtChat1.htm",

    GetVersion(),

    GetVersionHistory());

  //a.AddLibrary("Encranger version: " + Encranger::GetVersion());

  //a.AddLibrary("LoopReader version: " + LoopReader<int>::GetVersion());

  return a;

}

//---------------------------------------------------------------------------

const std::string WtChat1Dialog::GetVersion()

{

  return "1.0";

}

//---------------------------------------------------------------------------

const std::vector<std::string> WtChat1Dialog::GetVersionHistory()

{

  std::vector<std::string> v;

  v.push_back("2011-04-12: Version 1.0: initial version");

  return v;

}

//---------------------------------------------------------------------------

void WtChat1Dialog::OnAboutClick()

{

  m_timer->stop();

  ShowAbout();

}

//---------------------------------------------------------------------------

void WtChat1Dialog::OnCloseClick()

{

  m_signal_close();

}

//---------------------------------------------------------------------------

void WtChat1Dialog::OnEditChange()

{

  if (m_edit->text().empty()) return;

  const std::string new_text

    = m_text->text().toUTF8()

    + boost::lexical_cast<std::string>('\n')

    + m_edit->text().toUTF8();

  {

    std::ofstream f(m_chat_filename.c_str());

    f << new_text;

  }

  m_text->setText(new_text);

  m_edit->setText("");

}

//---------------------------------------------------------------------------

void WtChat1Dialog::OnTimer()

{

  if (!boost::filesystem::exists(m_chat_filename)) return;

  const std::vector<std::string> v = FileToVector(m_chat_filename);

  std::string text;

  BOOST_FOREACH(const std::string s,v)

  {

    if(s.empty()) continue;

    text+=s;

    text+='\n';

  }

  if (!text.empty()) text.resize(text.size() - 1); //pop '\n'

  m_text->setText(text);

}

//---------------------------------------------------------------------------

void WtChat1Dialog::ShowAbout()

{

  About a = GetAbout();

  WtAboutDialog * const d = new WtAboutDialog(a);

  d->m_signal_close.connect(

    boost::bind(

    &WtChat1Dialog::ShowChat,

    this));

  this->clear();

  this->addWidget(d);

}

//---------------------------------------------------------------------------

void WtChat1Dialog::ShowChat()

{

  this->clear();

  //Title

  {

    Wt::WLabel * const title = new Wt::WLabel("WtChat1");

    title->setStyleClass("title");

    this->addWidget(title);

  }

  this->addWidget(new Wt::WBreak);

  {

    m_text = new Wt::WTextArea;

    this->addWidget(m_text);

  }

  this->addWidget(new Wt::WBreak);

  {

    m_edit = new Wt::WLineEdit;

    m_edit->changed().connect(

      this, &WtChat1Dialog::OnEditChange);

    this->addWidget(m_edit);

  }

  this->addWidget(new Wt::WBreak);

  //About button

  {

    Wt::WPushButton * const button = new Wt::WPushButton("About");

    button->clicked().connect(

      this, &WtChat1Dialog::OnAboutClick);

    this->addWidget(button);

  }

  //Close button

  {

    Wt::WPushButton * const button = new Wt::WPushButton("Close");

    button->clicked().connect(

      this, &WtChat1Dialog::OnCloseClick);

    this->addWidget(button);

  }

  m_timer = new Wt::WTimer;

  m_timer->setInterval(1000);

  m_timer->start();

  m_timer->timeout().connect(

    this, &WtChat1Dialog::OnTimer);

  }

//---------------------------------------------------------------------------

wtchat1dialog.h


//---------------------------------------------------------------------------

/*

WtChat, chatting server

Copyright (C) 2011 Richel Bilderbeek



This program is free software: you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation, either version 3 of the License, or

(at your option) any later version.



This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program. If not, see <http://www.gnu.org/licenses/>.

*/

//---------------------------------------------------------------------------

//From http://www.richelbilderbeek.nl/CppWtChat1.htm

//---------------------------------------------------------------------------

#ifndef WTCHAT1DIALOG_H

#define WTCHAT1DIALOG_H

//---------------------------------------------------------------------------

#include <boost/signals2.hpp>

//---------------------------------------------------------------------------

#include <Wt/WContainerWidget>

//---------------------------------------------------------------------------

#include "about.h"

//---------------------------------------------------------------------------

namespace Wt

{

  struct WLineEdit;

  struct WTextArea;

  struct WTimer;

}

//---------------------------------------------------------------------------

struct WtChat1Dialog : public Wt::WContainerWidget

{

  WtChat1Dialog();

  mutable boost::signals2::signal<void ()> m_signal_close;



  private:

  Wt::WLineEdit * m_edit;

  Wt::WTextArea * m_text;

  Wt::WTimer * m_timer;

  static const std::string m_chat_filename;



  void OnAboutClick();

  void OnCloseClick();

  void OnEditChange();

  void OnTimer();

  void ShowAbout();

  void ShowChat();



  public:

  static const std::vector<std::string> FileToVector(const std::string& filename);

  static const About GetAbout();

  static const std::string GetVersion();

  static const std::vector<std::string> GetVersionHistory();



};

//---------------------------------------------------------------------------

#endif // WTCHAT1DIALOG_H

wtmain.cpp


//---------------------------------------------------------------------------

/*

WtChat, chatting server

Copyright (C) 2011 Richel Bilderbeek



This program is free software: you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation, either version 3 of the License, or

(at your option) any later version.



This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program. If not, see <http://www.gnu.org/licenses/>.

*/

//---------------------------------------------------------------------------

//From http://www.richelbilderbeek.nl/CppWtChat1.htm

//---------------------------------------------------------------------------

#include <iostream>

//---------------------------------------------------------------------------

#include <boost/program_options.hpp>

//---------------------------------------------------------------------------

#include <Wt/WApplication>

#include <Wt/WContainerWidget>

#include <Wt/WEnvironment>

//---------------------------------------------------------------------------

#include "wtchat1dialog.h"

//---------------------------------------------------------------------------

struct WtApplication : public Wt::WApplication

{

  WtApplication(const Wt::WEnvironment& env)

    : Wt::WApplication(env),

    m_dialog(new WtChat1Dialog)

  {

    this->setTitle("WtChat1");

    this->useStyleSheet("wt.css");

    root()->addWidget(m_dialog);



  }

  private:

  WtChat1Dialog * const m_dialog;

};

//---------------------------------------------------------------------------

Wt::WApplication *createApplication(

  const Wt::WEnvironment& env)

{

  return new WtApplication(env);

}

//---------------------------------------------------------------------------

int main(int argc, char **argv)

{

  // Declare the supported options.

  boost::program_options::options_description d(

    "Allowed options for TestLed");

  std::string docroot;

  std::string http_address;

  std::string http_port;

  d.add_options()

      ("help",

        "produce this help message")

      ("docroot",

         boost::program_options::value<std::string>(&docroot)->default_value("."),

         "the docroot")

      ("http-address",

         boost::program_options::value<std::string>(&http_address)->default_value("0.0.0.0"),

         "the server's http address")

      ("http-port",

         boost::program_options::value<std::string>(&http_port)->default_value("8080"),

         "the server's http port")

      ;



  boost::program_options::variables_map m;

  boost::program_options::store(

    boost::program_options::parse_command_line(

      argc, argv, d), m);

  boost::program_options::notify(m);



  if (m.count("help"))

  {

    //Display the options_description

    std::cout << d << "\n";

    return 0;

  }



  //Create the arguments in std::string format

  std::vector<std::string> v(7);

  v[0] = argv[0];

  v[1] = "--docroot";

  v[2] = docroot;

  v[3] = "--http-address";

  v[4] = http_address;

  v[5] = "--http-port";

  v[6] = http_port;



  //Convert the arguments to char* format

  std::vector<char*> w(7);

  for (int i=0; i!=7; ++i) w[i] = &v[i][0];



  //Give Wt the modified parameters

  return WRun(w.size(), &w[0], &createApplication);

}

//---------------------------------------------------------------------------

Go back to Richel Bilderbeek's C++ page.

Go back to Richel Bilderbeek's homepage.

(C++) CppWtChat1

Technical facts

Qt project file: CppWtChat1.pro

wtchat1dialog.cpp

wtchat1dialog.h

wtmain.cpp