Operating system(s) or programming environment(s)
Lubuntu 15.04 (vivid)
Qt Creator 3.1.1
- G++ 4.9.2
Libraries used:
STL: GNU ISO C++ Library, version
4.9.2
Qt project file: ./CppHelloWtQtCreatorWindows/CppHelloWtQtCreatorWindows.pro
include(../../WebApplication.pri) include(../../Libraries/BoostAll.pri) include(../../Libraries/Wt.pri) !win32 { error(Must be native Windows) } SOURCES += main.cpp
/* * Copyright 2008 Emweb bvba, Heverlee, Belgium. * * See the LICENSE file for terms of use. */ #pragma GCC diagnostic push #pragma GCC diagnostic ignored "-Weffc++" #pragma GCC diagnostic ignored "-Wunused-local-typedefs" #pragma GCC diagnostic ignored "-Wunused-but-set-parameter" #include <Wt/WApplication> #include <Wt/WBreak> #include <Wt/WContainerWidget> #include <Wt/WLineEdit> #include <Wt/WPushButton> #include <Wt/WText> #include <boost/version.hpp> #pragma GCC diagnostic pop using namespace Wt; /* * A simple hello world application class which demonstrates how to react * to events, read input, and give feed-back. */ class HelloApplication : public WApplication { public: HelloApplication(const WEnvironment& env); private: WLineEdit *nameEdit_; WText *greeting_; void greet(); }; /* * The env argument contains information about the new session, and * the initial request. It must be passed to the WApplication * constructor so it is typically also an argument for your custom * application constructor. */ HelloApplication::HelloApplication(const WEnvironment& env) : WApplication(env) { setTitle("Hello world"); // application title root()->addWidget(new WText("Your name, please ? ")); // show some text nameEdit_ = new WLineEdit(root()); // allow text input nameEdit_->setFocus(); // give focus WPushButton *b = new WPushButton("Greet me.", root()); // create a button b->setMargin(5, Left); // add 5 pixels margin root()->addWidget(new WBreak()); // insert a line break greeting_ = new WText(root()); // empty text /* * Connect signals with slots * * - simple Wt-way */ b->clicked().connect(this, &HelloApplication::greet); /* * - using an arbitrary function object (binding values with boost::bind()) */ nameEdit_->enterPressed().connect (boost::bind(&HelloApplication::greet, this)); } void HelloApplication::greet() { /* * Update the text, using text input into the nameEdit_ field. */ greeting_->setText("Hello there, " + nameEdit_->text()); } WApplication *createApplication(const WEnvironment& env) { /* * You could read information from the environment to decide whether * the user has permission to start a new application */ return new HelloApplication(env); } int main(int argc, char **argv) { /* * Your main member function may set up some shared resources, but should then * start the server application (FastCGI or httpd) that starts listening * for requests, and handles all of the application life cycles. * * The last argument to WRun specifies the function that will instantiate * new application objects. That function is executed when a new user surfs * to the Wt application, and after the library has negotiated browser * support. The function should return a newly instantiated application * object. */ return WRun(argc, argv, &createApplication); }