Wt, C++ Web Toolkit

Last update: Dec 30, 2022

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Artificial Intelligence wt

Overview

What is Wt ?

Wt is a C++ library for developing web applications. It consists of:

libwt, a widget/rendering library
libwthttp, an (async I/O) HTTP/WebSockets server
libwtfcgi, a FastCGI connector library (Unix)
libwtisapi, an ISAPI connector library (Windows)
libwttest, a test connector environment

It also contains a C++ ORM, which can be used in a web application (obviously), but can also be used on its own:

libwtdbo, a C++ ORM
libwtdbopostgres, PostgreSQL backend
libwtdbosqlite3, Sqlite3 backend
libwtdbomysql, MySQL and MariaDB backend
libwtdbomssqlserver, Microsoft SQL Server backend
libwtdbofirebird, Firebird backend

For more information, see the homepage.

Dependencies

To build Wt from source you will need at least CMake (>= 3.1), and boost (version >= 1.50).

Optionally, you may want to add:

OpenSSL for SSL and WebSockets support in the built-in httpd, the HTTP(S) client, and additional cryptographic hashes in the authentication module
Haru PDF library which is used for painting to PDF
GraphicsMagick which is used for painting to PNG, GIF (on Windows, Direct2D can be used instead)
PostgreSQL for the PostgreSQL Dbo backend
MySQL or MariaDB for the MySQL Dbo backend
An ODBC driver for the Microsoft SQL Server Dbo backend, and unixODBC on Unix-like platforms
Firebird for the Firebird Dbo backend
Pango for improved font support in PDF and raster image painting. On Windows, DirectWrite can be used instead.
ZLib for compression in the built-in httpd.

For the FastCGI connector, you also need:

FastCGI development kit: you need the C/C++ library (libfcgi++)

Building

Generic instructions for Unix-like platforms or Windows platforms.

Bug Reporting

Bugs can be reported here http://redmine.webtoolkit.eu/projects/wt/issues/new

Demos, examples

The homepage, itself a Wt application, contains also various examples.

License

Wt is available under two licenses:

the GNU General Public License, Version 2, with OpenSSL exception. Only version 2 of the GPL applies. See the LICENSE file for more information.
a commercial license, which does not require you to distribute the source code of your application. Request a quotation online or contact [email protected] for more information.

See doc/licenses.md for an exhaustive list of the licenses used by Wt, source code from external sources included in Wt and common (optional) external dependencies.

Comments

CMake: Export Wt package
The IMPORTED targets:

Wt::Wt

Wt::Ext

Wt::Test

Wt::HTTP

Wt::FCGI

Wt::Isapi

Wt::Dbo

Wt::DboSqlite3

Wt::DboPostgres

Wt::DboFirebird

Wt::DboMySQL

Usage in CMake project:

find_package(Wt) add_executable(hello hello.cpp) target_link_libraries(hello Wt::HTTP)

Use the NEW behavior for the policy CMP0022 to export relocatable Config-file package

Use Boost IMPORTED targets if defined

Update minimum required CMake version to 2.8.12
opened by podsvirov 23
Add traverse() method for WAbstractItemModel

Add a method to traverse the whole sub tree of a valid index using the iterative approach. The method is implemented in WAbstractItemModel but a convenience function is added to WModelIndex. For each new visited index, a callback function is called. The callback is declared like this: std::function<bool(const Wt::WModelIndex &)> The parameter is a const reference to the currently traversed index. The return value indicates if the traversing should be continued or interrupted. 'true' means interrupt, 'false' means do not interrupt. When the traversing is finished, the last traversed index is returned.

opened by ekondayan 11
Client side clock/timezone offset time feature in WEnvironment using JavaScript

This commit adds the feature to get the client's clock time and client's time by applying a timezone offset to UTC time in Wt::WEnvironment.

Boot.min.js was compressed on http://javascriptcompressor.com/ There may be some places where there are Tab indents instead of 2 spaces :)

opened by SaiFi0102 9
Perfect forwarding for Signal parameters

This fix allows you to pass move-only objects as signal parameters. To do this, they are wrapped in std::forward(). In other words the parameters are perfectly forwarded.

An example use cases where this can be useful:

Example emiting: button->clicked().connect( [this] { my_signal.emit(std::make_unique<Wt::WText>("Send this text widget by a signal")); });

Example Slot :

void contentLoad(std::unique_ptr<Wt::WWidget> widget) { root()->addWidget(std::move(widget)); }

opened by ekondayan 7
fix compiler warning and optimization

fix compiler warning and optimization

clang++ was warning that adding a char to a string does not append to the string, so I changed it to std::string.push_back(c);

I also changed the loop into a switch statement, allowing for better compiler optimization than the loop.

opened by matiu2 7
Implement "RESTRICT" foreign key constraint in Wt::Dbo module
The RESTRICT foreign key constraint is supported by all the major databases. It is a must have feature for quite a lot of database schemes. It's implementation in the Wt::Dbo module is very straight forward process, so there is no apparent reason no to do so.

Tested:

Wt compiles successfully

SQLite3 - SQL generation for the tables works as expected
opened by ekondayan 5
CMake is not able to find boost components using wt-config.cmake
The expression

find_package(Boost QUIET COMPONENTS "@Boost_COMPONENTS@")

results in

find_package(Boost QUIET COMPONENTS "program_options;filesystem;thread")

according to the CMake documentation [1] and [2] is a list with one entry "program_options;filesystem;thread" and CMake is unable to find the component "program_options;filesystem;thread"

The correct form is

find_package(Boost QUIET COMPONENTS program_options;filesystem;thread)

Then CMake interprets program_options;filesystem;thread as a list with three entries.

[1] https://cmake.org/cmake/help/latest/command/find_package.html?highlight=components [2] https://cmake.org/cmake/help/latest/command/list.html
opened by StefanRommel 5
HTTP PATCH support for Wt 3.7

This patchset adds support for making Http Patch requests using Wt::Http::Client. This patchset allows WResource to respond to Http Patch requests. This patchset expands Wt::Http::Redirection support to allow for Method preserving redirection - e.g. Http 307/308 with a POST results in a Post. This patchset expands Wt::Http::Redirection support to allow for Method translating redirection - e.g. Http 301/302 with a POST results in a Get.

opened by jamal-fuma 5
Fix WTimePicker segfault on construction

Constructors which do not take a WTimeEdit as parameter segfault due to dereferencing uninitialised timeEdit_ variable. Issue fixed by default initialising timeEdit_ in these cases

opened by shiftee 5
Added WCompositeWidget::formWidgetImpl() as an alternative to "WCompositeFormWidget":

-Added feature to add WFormModel::validator to WCompositeWidget's WFormWidget Impl by WTemplateFormView -Made the WCompositeWidget::setDisabled function similar to WWebWidget::setDisabled so that propagateSetEnabled should only be called when isEnabled() has changed -Should have fixed WCompositeWidget::setDisabled so that it doesn't call impl_->propagateSetEnabled() twice, since impl_->setDisabled() should also call the same function -Added WTemplate::Functions::fwId() to get WCompositeWidget::formWidgetImpl()'s ID or WObject::id() -Added a test in WSuggestionPopup::forEdit so that multiple calls to forEdit shouldn't cause trouble

opened by SaiFi0102 5
Fix mysql backend build

This fix helps to specify full path to the mysqlclient library.

For example, on ubuntu 18.04 the path to mysqlclient is /usr/lib/x86_64-linux-gnu/. This means that in release 4.0,4 I can not build mysq backend. My request helps to fix this issue.

opened by akapust1n 4
Fixed WFormWidget placeholder not updating on locale change

I found that the placeholder text of a WLineEdit widget, that was set by WLineEdit::setPlaceholderText(WString::tr("...")) does not update when changing the WApplication's locale, as described in Issue 11156.

This pull request contains a proposed fix for that issue.

opened by skoehler47 0
Touch up documentation on Wt::WSignal

The documentation was missing qualifications concerning under which conditions the signal would NOT be disconnected. That is, for instance if you pass a lambda function object (which doesn't inherit from Wt::Core::observable), Wt::WSignal has no way to unregister or disconnect the signal.

opened by limitedAtonement 4
Improved performance of adding rows and columns to the WTable

The issue was the calling of WTableRow::rowNum() for every added cell, which iterated over the whole table.

The methods WTableRow::createCell(), WTableRow::insertColumn() and WTableRow::expand() got the new row argument defaulting to -1 that WTable can use when creating new elements with WTable::insertRow() and WTable::insertColumn(). These methods are called by WTable::expand() so the performance improvement affects every operation that expands the table.

The performance of populating a new table row by row is increased with this commit from O(n^2+n) to O(n).

opened by jakub-w 2