(C++) WtAutoRun

 

 

WtAutoRun is a bare-bone Wt program that starts the application without the need of a user giving command-line parameters. It is a fine starting point for a Wt application.

 

• Download the 'WtAutoRun' source code (zip)

 

The class WtAutoConfig embodies this functionality as a stand-alone class.

Technical facts

 

Application type(s)

• Web application

Operating system(s) or programming environment(s)

• Lubuntu 15.04 (vivid)

IDE(s):

• Qt Creator 3.1.1

Project type:

• Console application

C++ standard:

• C++98

Compiler(s):

• G++ 4.9.2

Libraries used:

• Boost: version 1.55
• Qt: version 5.4.1 (32 bit)
• STL: GNU ISO C++ Library, version 4.9.2
• Wt: version 3.3.3

 

 

 

 

 

Qt project file: ./CppWtAutoRun/CppWtAutoRun.pro

 

---

exists(../../WebApplication.pri) {   include(../../WebApplication.pri) } !exists(../../WebApplication.pri) {   QT       += core   QT       -= gui   CONFIG   += console   CONFIG   -= app_bundle   TEMPLATE = app } exists(../../Libraries/BoostAll.pri) {   include(../../Libraries/BoostAll.pri) } !exists(../../Libraries/BoostAll.pri) {   INCLUDEPATH += \     ../../Libraries/boost_1_55_0   LIBS += \     -lboost_date_time \     -lboost_filesystem \     -lboost_program_options \     -lboost_regex \     -lboost_signals \     -lboost_system } exists(../../Libraries/Wt.pri) {   include(../../Libraries/Wt.pri) } !exists(../../Libraries/Wt.pri) {   INCLUDEPATH += \     ../../Libraries/wt/src \     ../../Libraries/wt/build   LIBS += -lwt -lwthttp } SOURCES += main.cpp

 

 

 

 

 

./CppWtAutoRun/main.cpp

 

---

#pragma GCC diagnostic push #pragma GCC diagnostic ignored "-Weffc++" #pragma GCC diagnostic ignored "-Wunused-local-typedefs" #include <boost/program_options.hpp> #include <boost/signals2.hpp> #include <Wt/WApplication> #include <Wt/WContainerWidget> #include <Wt/WEnvironment> #include <Wt/WPaintDevice> #include <Wt/WPaintedWidget> #include <Wt/WPainter> #include <Wt/WPushButton> #pragma GCC diagnostic pop struct WtWidget : public Wt::WPaintedWidget {   WtWidget()   {     this->resize(32,32);   }   protected:   void paintEvent(Wt::WPaintDevice *paintDevice)   {     Wt::WPainter painter(paintDevice);     for (int y=0; y!=32; ++y)     {       for (int x=0; x!=32; ++x)       {         painter.setPen(           Wt::WPen(             Wt::WColor(               ((x+0) * 8) % 256,               ((y+0) * 8) % 256,               ((x+y) * 8) % 256)));         //Draw a line of one pixel long         painter.drawLine(x,y,x+1,y);         //drawPoint yiels too white results         //painter.drawPoint(x,y);       }     }   } }; struct WtDialog : public Wt::WContainerWidget {   WtDialog()   : m_widget(new WtWidget)   {     this->addWidget(m_widget);   }   private:   WtWidget * const m_widget; }; struct WtApplication : public Wt::WApplication {   WtApplication(const Wt::WEnvironment& env)     : Wt::WApplication(env),     m_dialog(new WtDialog)   {     this->setTitle("Thinking Wt 2: creating a  widget");     root()->addWidget(m_dialog);   }   private:   WtDialog * 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 CppWtAutoRun");   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); }