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ReleaseNotes.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<style>
dt { font-weight: bold; }
h3 { text-decoration: underline; }
dd { margin-top: 10px; margin-bottom: 10px; }
dd p { margin-top: 0; }
dd div { margin: 10px 0; }
</style>
<title>Wt Release notes</title>
</head>
<body>
<h1>Wt Release notes</h1>
This file lists important notes on migrating existing applications to
newer version of Wt. It lists changes in the library that may break
the way you build Wt, the way you configure Wt or the Wt API and
behaviour.
<h2>Release 4.9.0 (November 2022)</h2>
<h3>Backwards incompatible changes</h3>
<h4>Removal of jQuery</h4>
<p>
We removed every use of jQuery from Wt, and jQuery is now no longer automatically loaded.
This means that if you relied on the included jQuery version (for example, the <code>$</code> object or function),
you will have to make some changes to make it work with Wt 4.9.0. There are several options:
</p>
<ul>
<li>
<p>
Replace your uses of jQuery with vanilla JavaScript, which is what we did.
</p>
<p>
For example, the <code>$</code> function can often be replaced with
<a href="https://developer.mozilla.org/en-US/docs/Web/API/Document/querySelector" target="_blank">querySelector</a> or
<a href="https://developer.mozilla.org/en-US/docs/Web/API/Document/querySelectorAll" target="_blank">querySelectorAll</a>.
</p>
</li>
<li>
<p>
Load jQuery yourself using
<a href="classWt_1_1WApplication.html#ae88546224ed32cade783da188b145138">WApplication::require()</a>.
<a href="classWt_1_1WApplication.html#aa2add60804ff75b3798fc270050654c5">WApplication::requireJQuery()</a>
has been marked as deprecated.
</p>
<p>
For example:
<code>application->require("https://code.jquery.com/jquery-3.6.1.slim.min.js", "$");</code>.
</p>
</li>
<li>
<p>
Change your <code>wt_config.xml</code>, adding a <code><head-matter></code> section
that loads jQuery through a <code><script></code> tag:
</p>
<p>
<code>
<head-matter><br>
<script<br>
src="https://code.jquery.com/jquery-3.6.1.slim.min.js"<br>
integrity="sha256-w8CvhFs7iHNVUtnSP0YKEg00p9Ih13rlL9zGqvLdePA="<br>
crossorigin="anonymous"></script><br>
</head-matter>
</code>
</p>
</li>
</ul>
<h3>Other</h3>
<ul>
<li>
<a href="https://redmine.webtoolkit.eu/issues/8629" target="_blank">Issue #8629</a>:
In order to ease maintenance, and make contributing to Wt easier, we changed the JavaScript
minifier from the old version of Google Closure compiler we were using to
<a href="https://terser.org/" target="_blank">terser</a>.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/9570" target="_blank">Issue #9570</a>:
All uses of <code>WT_CXX14</code> and <code>WT_CXX14ONLY</code> were removed in Wt's
source code. <code>WT_CXX14</code> is now always defined, since Wt <strong>requires</strong>
C++14. We marked <code>Wt::cpp14::make_unique</code> as deprecated, since this only
existed because C++11 lacked <code>std::make_unique</code>.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/10914" target="_blank">Issue #10914</a>:
Changed some Boost.Phoenix includes to silence deprecation warnings.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/10911" target="_blank">Issue #10911</a>:
Fixed OpenSSL 3.0 deprecation warnings.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/9252" target="_blank">Issue #9252</a>:
Fixed a deprecation warning in the Pango font support implementation.
</li>
<li>
<tt><a href="https://redmine.webtoolkit.eu/issues/9076" target="_blank">Issue #9076</a></tt>:
The Wt::WDateEdit gave a javascript error when opening the calendar popup if the application was rendered in widgetset mode.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/10966" target="_blank">Issue #10966</a>:
Added a JavaScript formatter to format Wt's JavaScript code.
Its usage is detailed in the Wt source tree at
<a
href="https://github.com/emweb/wt/blob/master/doc/development/javascript.md"
target="_blank"><code>doc/development/javascript.md</code></a>.
</li>
</ul>
<h2>Release 4.8.1 (September 22, 2022)</h2>
<p>
As usual, Wt 4.8.1 is a patch release, but we also added a document
clarifying our policy on which minimum versions of libraries Wt requires
(<a href="https://redmine.webtoolkit.eu/issues/8801" target="_blank">issue #8801</a>).
You can find this document in Wt's source tree at
<a
href="https://github.com/emweb/wt/blob/master/doc/MinimumDependencyVersions.md"
target="_blank"><code>doc/MinimumDependencyVersions.md</code></a>.
</p>
<p>
That aside, Wt 4.8.1 addresses the following issues:
</p>
<ul>
<li>
<a href="https://redmine.webtoolkit.eu/issues/10909" target="_blank">Issue #10909</a>:
<a href="classWt_1_1WPdfImage.html">WPdfImage</a>: Fixed compatibility with recent libharu
versions (2.4.0 and up, excluding version 2.4.1).
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/10825" target="_blank">Issue #10825</a>:
Fixed an issue in <a href="classWt_1_1WGoogleMap.html">WGoogleMap</a> where some left-over
JavaScript code in
<a href="classWt_1_1WGoogleMap.html#ad5b1aabd260b3b05e9888718264c40e2">setMapTypeControl</a>
targeting the v2 API would cause a JavaScript error.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/10834" target="_blank">Issue #10834</a>:
Fixed a regression since Wt 4.8.0 with the tests for
<a href="https://redmine.webtoolkit.eu/issues/9442">issue #9442</a>,
<code>dbo_test46</code> would fail with the MySQL/MariaDB and the SQL Server
backends because they sort null values differently from PostgreSQL.
</li>
</ul>
<h2>Release 4.8.0 (July 8, 2022)</h2>
<p>
Wt 4.8.0 doesn't come with any big new features, but it does include some handy new
functions here and there, and some improvements.
We have also removed Skia from Wt because we can use
Direct2D on Windows and GraphicsMagick on every other operating system.
</p>
<h3>Removals</h3>
<ul>
<li>
<a href="https://redmine.webtoolkit.eu/issues/10248" target="_blank">Issue #10254</a>:
The Skia-based <a href="Wt_1_1WRasterImage.html">WRasterImage</a> implementation has been removed,
since it was unmaintained and dependent on very specific Skia versions, and we have good alternatives
with GraphicsMagick and Direct2D.
</li>
</ul>
<h3>Changes in default behavior</h3>
<ul>
<li>
Notable changes in exception handling:
<ul>
<li>
<a href="https://redmine.webtoolkit.eu/issues/10137" target="_blank">Issue #10137</a>:
Exceptions thrown from
<a href="classWt_1_1WResource.html#a3a740f8cc29e2e6e4e58defc9c88b8b6">WResource::handleRequest()</a>
are now caught and logged instead of causing a crash.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/10136" target="_blank">Issue #10136</a>:
Uncaught exceptions emanating from
<a href="classWt_1_1WApplication.html#a4a6f167bea94aefa8ba24f914c2fbee5">WApplication::notify()</a>
would be sent to the browser. This exposes potentially sensitive details
about the application to the end user. Wt now just sends a simple
"500 Internal Server Error" without any further details. The exception details
will still be logged.
</li>
</ul>
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/8660" target="_blank">Issue #8660</a>:
The default value of
<a href="classWt_1_1Auth_1_1OAuthService.html#a86b514d3e49a16e1004759287548e576">OAuthService::popupEnabled()</a>
was changed from <code>true</code> to <code>false</code>.
This means that the default method when using OAuth is always to redirect instead of using a popup.
</li>
</ul>
<h3>New features</h3>
<ul>
<li>
<a href="https://redmine.webtoolkit.eu/issues/9861" target="_blank">Issue #9861</a>:
The
<a href="https://github.com/emweb/wt/tree/master/examples/wtwithqt" target="_blank">wtwithqt</a>
example can now be built with Qt 6.
</li>
<li>
<a href="https://redmine.emweb.be/issues/10589" target="_blank">Issue #10589</a>:
Added public getters for two members in the <a href="classWt_1_1Form_1_1Dbo_1_1FormModel.html">FormModel</a>
and <a href="classWt_1_1Form_1_1Dbo_1_1FormView.html">FormView</a> classes that were introduced in
<a href="https://redmine.emweb.be/issues/8622" target="_blank">issue #8622</a>. Users can now access the underlying
database object represented by the model and the model used by the view.
</li>
<li>
<a href="https://github.com/emweb/wt/pull/189" target="_blank">PR #189</a>:
Added support for <code>long</code> in <code>Wt::Json</code>.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/9442" target="_blank">Issue #9442</a>:
New features for
<a href="classWt_1_1Dbo_1_1Query.html">Wt::Dbo::Query</a>:
<ul>
<li>
Added overloads for <a href="classWt_1_1Dbo_1_1Query.html#ab99203f02889f09d5ba819eec1f96dfc">Query::join()</a>,
<a href="classWt_1_1Dbo_1_1Query.html#af2b09a60768a3d9e84cf26316cb76dd9">Query::leftJoin()</a> and
<a href="classWt_1_1Dbo_1_1Query.html#ac5e215165a41a010bd02f0496975955c">Query::rightJoin()</a> that have
a template parameter for the type of the database table that needs to be joined. Since Wt knows the mapping
between the type and the database table, it automatically fills in the name of the table.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/9442" target="_blank">Issue #9442</a>:
Added functions <a href="classWt_1_1Dbo_1_1Query.html#aad47f25e7c86f927e0b2d86c4f519f8a">Query::asString()</a>
and <a href="classWt_1_1Dbo_1_1Query.html#abd755ac8e896597a569ab202f5afa4d6">Query::bindSubqueryValues()</a>.
These functions make it possible to embed one query in another by converting it to a string and moving all
its bound parameters to the other query. See
<a href="classWt_1_1Dbo_1_1Query.html#abd755ac8e896597a569ab202f5afa4d6">Query::bindSubqueryValues()</a>
for a basic code example.
</li>
</ul>
</li>
</ul>
<h3>Improvements</h3>
<ul>
<li>
<a href="https://redmine.webtoolkit.eu/issues/10019" target="_blank">Issue #10019</a>:
Added a cleaner fix for <a href="https://redmine.webtoolkit.eu/issues/9922" target="_blank">issue #9922</a>.
Instead of discarding responses containing only <code>{}</code>, Wt now no longer delineates its JavaScript
with curly brackets.
</li>
<li>
<a href="https://github.com/emweb/wt/pull/192" target="_blank">PR #192</a>:
Removed obsolete <code>cursor: hand</code>
</li>
</ul>
<h3>Bug fixes</h3>
<ul>
<li>
<a href="https://redmine.webtoolkit.eu/issues/9938" target="_blank">Issue #9938</a>:
The close icon for a <a href="classWt_1_1WDialog.html">WDialog</a> was displayed on the left side
of the title bar when using bootstrap 5. This was fixed by using the Bootstrap 5 appropriate
<code><button></code> with the <code>btn-close</code> style class.
A new <code>Wt.WDialog.titlebar</code> template was introduced so that the rendering
of the title bar can be overridden.
</li>
<li>
Fixed <a href="https://redmine.webtoolkit.eu/issues/10599" target="_blank">issue #10599</a>:
there were issues on macOS when using a statically built Wt library, causing the linker to output
warnings and some test cases to fail.
</li>
<li>
Fixed <a href="https://redmine.webtoolkit.eu/issues/10599" target="_blank">issue #10604</a>:
self-assignment of
<a href="classWt_1_1Dbo_1_1Query.html">Wt::Dbo::Query</a>
would lose bound parameters.
</li>
<li>
<a href="https://github.com/emweb/wt/pull/187">PR #187</a>:
Negative floating point numbers would always be formatted in scientific notation when
being output as JavaScript. This has been fixed to only use scientific notation for
particularly small or particularly large numbers.
</li>
</ul>
<h3>Miscellaneous</h3>
<ul>
<li>
<a href="https://redmine.webtoolkit.eu/issues/10248" target="_blank">Issue #10248</a>:
Tabs have been replaced by spaces in the source code. Previously, we had a mix of tabs and spaces,
where newer code used only spaces, and older code changed 8 spaces into a tab.
</li>
</ul>
<h2>Release 4.7.3 (July 8, 2022)</h2>
<p>
Wt 4.7.3 is a patch release that addresses the following issues:
</p>
<ul>
<li>
<a href="https://redmine.webtoolkit.eu/issues/10341" target="_blank">Issue #10341</a>:
Fixed an issue where JavaScript validators would incorrectly mark a <a href="classWt_1_1WLineEdit.html">WLineEdit</a>
that used an
<a href="classWt_1_1WLineEdit.html#a0639ec7e420ba32ffb148303a79fb969">input mask</a>
as invalid, since they would not take the input mask into account.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/10543" target="_blank">Issue #10543</a>
(<a href="https://github.com/emweb/wt/pull/194" target="_blank">PR #194</a>):
The
<a href="classWt_1_1Dbo_1_1FixedSqlConnectionPool.html#ab7291dc4ff981598a75606ac29184002">timeout</a>
in
<a href="classWt_1_1Dbo_1_1FixedSqlConnectionPool.html">Wt::Dbo::FixedSqlConnectionPool</a>
was uninitialized, which caused a random timeout instead of no timeout if the timeout was left unspecified.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/10348" target="_blank">Issue #10348</a>:
Dbo: fixed an issue where reentrant use of prepared statements with parameters with the Postgres backend could
cause a "Binding too many parameters" exception to be thrown.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/9719" target="_blank">Issue #9719</a>
(<a href="https://github.com/emweb/wt/pull/186" target="_blank">PR #186</a>):
Fixed a regression where panning an interactive
<a href="classWt_1_1Chart_1_1WCartesianChart.html">WCartesianChart</a>
would not update the
<a href="classWt_1_1Chart_1_1WAxisSliderWidget.html">WAxisSliderWidget</a>.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/10362" target="_blank">Issue #10362</a>:
<a href="classWt_1_1WPanel.html#aefd66ff6dd8e2a1108e70efec4eab1b5">WPanel::collapse()</a> and
<a href="classWt_1_1WPanel.html#a2ac9a05172675559b6f988083a4fd666">WPanel::expand()</a>
would cause a segmentation fault with
<a href="classWt_1_1WBootstrap5Theme.html">WBootstrap5Theme</a>. Now they do nothing.
</li>
<li>
<a href="https://github.com/emweb/wt/pull/188" target="_blank">PR #188</a>:
Fixed an issue where
<a href="classWt_1_1WTable.html#a0496a46f14f74aed6df4fde8ed161f52">WTable::insertColumn</a>
would not properly associate the table with the newly created column.
</li>
<li>
Fixed <a href="https://redmine.webtoolkit.eu/issues/9923" target="_blank">issue #9923</a>:
A <a href="classWt_1_1WFileDropWidget.html">WFileDropWidget</a> with
<a href="classWt_1_1WFileDropWidget.html#a4032057631d756628f27b6546eeaa7bb">setAcceptDrops()</a>
<code>false</code> and
<a href="classWt_1_1WFileDropWidget.html#a0c1400a6f7f63eec4bb1cfe30807538e">setDropIndicationEnabled()</a>
<code>true</code> would render the page unresponsive.
</li>
<li>
<a href="https://github.com/emweb/wt/pull/193" target="_blank">PR #193</a>:
When the application creator returned a <code>null</code> pointer this would
cause a null pointer dereference. This was changed to throw an exception, which then
logs an error and cleanly terminates the session.
</li>
<li>
<a href="https://github.com/emweb/wt/pull/192" target="_blank">PR #192</a>:
<code><link></code> and <code><meta></code> tags used in
<code><head-matter></code> in <code>wt_config.xml</code> are now
properly outputted as self-closing tags. This fixes a regression introduced
in Wt 4.7.0.
</li>
<li>
Fixed <a href="https://redmine.webtoolkit.eu/issues/10578" target="_blank">issue #10578</a>:
Changing the validator of a
<a href="classWt_1_1WDateEdit.html">WDateEdit</a> would not update the
<a href="classWt_1_1WDateEdit.html#a9b3a90d5a5e9e5bc766aad3707f61736">bottom()</a> and
<a href="classWt_1_1WDateEdit.html#a68431831acb72c35f46d30b28e93e2a6">top()</a> of the
<code>WDateEdit</code> correctly.
</li>
</ul>
<h2>Release 4.7.2 (May 12, 2022)</h2>
<p>
Wt 4.7.2 is a patch release that addresses the following issues:
</p>
<ul>
<li>
<a href="https://redmine.webtoolkit.eu/issues/10287" target="_blank">Issue #10287</a>:
wthttp now properly sends close frame back when WebSocket connections are closed.
Previously, the browser would send a close frame and not get a response back. On Firefox,
these kinds of errors caused the creation of new WebSocket connections to the same
endpoint to be delayed by up to one minute, making it seem like the application is hanging.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/10003" target="_blank">Issue #10003</a>:
Calling <a href="classWt_1_1WApplication.html#a02b9d8aa1b6c2d0dc9edc1b9c63f86dc">WApplication::refresh()</a>
in the application constructor (e.g. by setting the locale) would produce a JavaScript error if there was
a <a href="classWt_1_1WSpinBox.html">WSpinBox</a> in the widget tree.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/10320" target="_blank">Issue #10320</a>:
Version 4.5.2
(issue <a href="https://redmine.webtoolkit.eu/issues/9363" target="_blank">#9363</a>) and 4.6.2
(issue <a href="https://redmine.webtoolkit.eu/issues/9572" target="_blank">#9572</a>)
added workarounds to deal with the incorrect formatting of floating point numbers with
Boost since version 1.76.0. Since Boost 1.79.0 this issue has been fixed, so the workaround
is now disabled for versions since 1.79.0.
</li>
</ul>
<h2>Release 4.7.1 (April 15, 2022)</h2>
<p>
Wt 4.7.1 is a patch release that addresses the following issues:
</p>
<ul>
<li>
<a href="https://redmine.webtoolkit.eu/issues/9922" target="_blank">Issue #9922</a>:
Wt would send an update to the browser on every call to
<a href="classWt_1_1WApplication.html#a51f50e0641a6d702a7c6ab7f8dd5946a">WApplication::triggerUpdate()</a>
if server push was enabled.
This is because Wt thought the state was dirty when its JavaScript response buffer contained only <code>{}</code> (empty
block). This has been fixed by not sending a response if the buffer contains only <code>{}</code>.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/10177" target="_blank">Issue #10177</a>:
<code>WT_API</code> was missing from <a href="classWt_1_1Json_1_1TypeException.html">Json::TypeException</a>,
which meant that its symbols were not exported from dynamic libraries.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/9695" target="_blank">Issue #9695</a>:
If a <a href="classWt_1_1WSuggestionPopup.html">WSuggestionPopup</a> was created before the dialog it appears in,
it would be displayed below the dialog. The <code>z-index</code> of
<code>WSuggestionPopup</code> is now calculated using javascript so it is always shown on top.
</li>
</ul>
<h2>Release 4.7.0 (March 11, 2022)</h2>
<p>Wt 4.7.0 is a smaller release with no major new features to speak of, just some improvements and bug fixes here and there.</p>
<h3>Notable changes in default behavior</h3>
<p>These changes affect default behavior in Wt, and may require special attention:</p>
<ul>
<li>
<a href="https://redmine.webtoolkit.eu/issues/7434" target="_blank">Issue #7434</a>:
<a href="classWt_1_1WColor.html#a738c53d744ed38a448d1554f2a2f42cf">WColor::cssText()</a> now outputs
the color in <code>rgba</code> format by default.
It is now possible to set the opacity using such functions as
<a href="classWt_1_1WCssDecorationStyle.html#ac6bd2a8b86c8092fc437329dac09b302">WCssDecorationStyle::setBackgroundColor()</a>.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/8782" target="_blank">Issue #8782</a>:
When using drag/drop in combination with
<a href="classWt_1_1WStandardItemModel.html">WStandardItemModel</a>,
the item flags are now copied. Previously, after dragging an item one time
the <a href="group__modelview.html#gga1d77c4de293aebfacbdde124de06b8b0a08ab0b568328fb06a466be97d62f5649">ItemFlag::DragEnabled</a>
flag would be lost and the item would no longer be draggable.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/9591" target="_blank">Issue #9591</a>:
<a href="https://www.webtoolkit.eu/wt/doc/reference/html/classWt_1_1Http_1_1Request.html#a970b7d266c6bead893ec6334520807bf">
Http::Request::urlScheme()
</a> now looks at <code>X-Forwarded-Proto</code> if Wt is behind a trusted reverse proxy.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/9056" target="_blank">Issue #9056</a>:
There were memory leaks in <a href="classWt_1_1WFileDropWidget.html">WFileDropWidget</a>. This was fixed by changing the class to use
smart pointers for memory management. As a side effect,
<a href="classWt_1_1WFileDropWidget.html#a1dbb3d29cfc84797148cd2758d5c0f6b">WFileDropWidget::uploads()</a> now returns a copy instead of a const reference to the internal vector.
</li>
</ul>
<h3>Removals</h3>
<ul>
<li>
Since Google Maps v2 is no longer available as of May 26 2021, Wt no longer supports v2.
</li>
</ul>
<h3>Bug fixes</h3>
<ul>
<li>
<a href="https://redmine.webtoolkit.eu/issues/9562" target="_blank">Issue #9562</a>:
<ul>
<li>If a <a href="classWt_1_1Mail_1_1Message.html">Mail::Message</a> was sent more than once, the attachments would be empty after the first time.</li>
<li>Mails sent by <a href="namespaceWt_1_1Auth.html">Wt::Auth</a> are now logged using <a href="classWt_1_1WLogger.html">WLogger</a> instead of using <code>std::cout</code>.
As a result, the logging can also be disabled by adding <code>-info:Auth.AuthService</code> to <code><log-config></code> in <code><wt_config.xml></code>.</li>
</ul>
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/9035" target="_blank">Issue #9035</a>:
The <code><head-matter></code> configuration option did not work with <code><script></code> elements without content (e.g. when using the <code>src</code> attribute).
The parser would always turn this into a self-closing tag, which is not allowed in HTML.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/9271" target="_blank">Issue #9271</a>:
<a href="classWt_1_1Dbo_1_1backend_1_1MySQL.html">Dbo::backend::MySQL</a> now properly preserves the microsecond part of timestamps.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/9264" target="_blank">Issue #9264</a>:
Added a remark to <a href="classWt_1_1WAbstractToggleButton.html#ae203379ba84c01935f68cd293f2a3eeb">WAbstractToggleButton::unChecked()</a> to clarify that it is not emitted
for <a href="classWt_1_1WRadioButton.html">WRadioButtons</a>.
</li>
</ul>
<h2>Release 4.6.3 (March 10, 2022)</h2>
<p>
Wt 4.6.3 is a patch release that addresses the following issues:
</p>
<ul>
<li>
<a href="https://redmine.webtoolkit.eu/issues/9790" target="_blank">Issue #9790</a>:
A localized <a href="classWt_1_1WText.html">WText</a> with <a href="namespaceWt.html#a140dea437d52d3d7c438ea3bd16a1480">TextFormat::XHTML</a> was not refreshed properly when using arguments.
</li>
</ul>
<h2>Release 4.6.2 (February 15, 2022)</h2>
<p>
Wt 4.6.2 is a patch release that addresses the following issues:
</p>
<ul>
<li>
<a href="https://redmine.webtoolkit.eu/issues/9424" target="_blank">Issue #9424</a>:
The special "no selection" status of
<a href="classWt_1_1WComboBox.html">WComboBox</a>
was lost if the items were rerendered, e.g. if the model changed.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/9721" target="_blank">Issue #9721</a>:
Somewhere during the Bootstrap 5 transition, we accidentally removed some example code (<code>pdfImageWrite.cpp</code>) from the widget gallery.
We added it back.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/9572" target="_blank">Issue #9572</a>:
Some JSON serialization tests were temporarily disabled since Boost 1.76.0, since the workaround put
in place does not generate entirely the same result.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/9571" target="_blank">Issue #9571</a>:
Provided a fix for a false positive <code>-Wfree-nonheap-object</code> warning in <code>Wt::Signals</code>.
</li>
</ul>
<h2>Release 4.6.1 (December 23, 2021)</h2>
<p>
Wt 4.6.1 is a single bug fix release, fixing a regression
(<a href="https://redmine.webtoolkit.eu/issues/9523" target="_blank">issue #9523</a>).
A potential null pointer dereference would crash the Wt site or widget gallery every few days.
</p>
<h2>Release 4.6.0 (December 14, 2021)</h2>
<p>
We know that this one took a bit longer than normal. Starting now we intend to make the Wt release cycle
more regular, with a release every three months, so we're planning to release Wt 4.7.0 in March 2022.
We've still been busy improving Wt though. Wt 4.6.0 introduces some major new features, including
Bootstrap 5 theming support, Dbo-based forms, and SAML support for Wt::Auth.
</p>
<h3>Bootstrap 5 theming support (<a href="https://redmine.webtoolkit.eu/issues/7418" target="_blank">issue #7418</a>)</h3>
<p>
We split up <a href="classWt_1_1WBootstrapTheme.html">WBootstrapTheme</a> into
<a href="classWt_1_1WBootstrap2Theme.html">WBootstrap2Theme</a> and
<a href="classWt_1_1WBootstrap3Theme.html">WBootstrap3Theme</a>, and added
<a href="classWt_1_1WBootstrap5Theme.html">WBootstrap5Theme</a>. We found that the
different Bootstrap versions were distinct enough to warrant splitting each version of the theme up into its own class.
</p>
<p>
We abandoned development of <code>WBootstrap4Theme</code>, since there were still some unsolved
issues with it, and we didn't expect many users to be interested in it.
</p>
<p>
We also updated the design of the <a href="https://www.webtoolkit.eu/widgets" target="_blank">widget gallery</a>.
It now uses Bootstrap 5, and no longer uses box layouts, instead opting for a more responsive design featuring
a collapsible menu on narrow screens. This means that the widget gallery is finally usable on mobile phones!
</p>
<h3>Dbo-based forms (<a href="https://redmine.webtoolkit.eu/issues/8622" target="_blank">issue #8622</a>)</h3>
<p>
We added a new feature that allows Wt to automatically generate a form for a Dbo class. Based on the data types
that are used by the Dbo class, Wt will generate <a href="classWt_1_1Form_1_1WAbstractFormDelegate.html">form delegates</a>.
These form delegates are responsible for creating the widget and optional validator for representing the data type in the UI.
For example:
<a href="classWt_1_1WString.html">WString</a> objects are by default represented by a
<a href="classWt_1_1WLineEdit.html">WLineEdit</a>,
<a href="classWt_1_1WDate.html">WDate</a> objects by
<a href="classWt_1_1WDateEdit.html">WDateEdit</a>, and so on.
</p>
<p>
The user is able to override the default behavior either by customizing the
<a href="classWt_1_1Form_1_1Dbo_1_1FormView.html#aa60100980949a327483cec31c2963420">widgets</a> and/or
<a href="classWt_1_1Form_1_1Dbo_1_1FormView.html#a55cb4e6750f29a4871686d19cf714042">validators</a> or by creating a new
form delegate for the specific field and <a href="classWt_1_1Form_1_1Dbo_1_1FormView.html#a42cad48a1c44d319325be1732520ba83">adding</a>
it to the form.
</p>
<p>
All classes related to this new feature have been added to a new <a href="namespaceWt_1_1Form.html">Wt::Form</a> namespace.
Here's a short overview of the most important classes within that namespace:
</p>
<ul>
<li>
<a href="classWt_1_1Form_1_1Dbo_1_1FormModel.html">FormModel</a>: a model class that holds the data of the database object.
</li>
<li>
<a href="classWt_1_1Form_1_1Dbo_1_1FormView.html">FormView</a>: a view class to represent the database object in the UI.
</li>
<li>
<a href="classWt_1_1Form_1_1WAbstractFormDelegate.html">WAbstractFormDelegate</a>: delegate for creating form widgets.
</li>
</ul>
<p>We also added a new <a href="https://github.com/emweb/wt/tree/master/examples/dbo-form" target="_blank">example</a> to display this new functionality.</p>
<h3>SAML support for Wt::Auth (<a href="https://redmine.webtoolkit.eu/issues/8621" target="_blank">issue #8621</a>)</h3>
<p>
We added SAML support for authentication with third party identity providers.
<a href="classWt_1_1Auth_1_1Saml_1_1Service.html">Wt::Auth::Saml::Service</a>
implements a minimal SAML 2.0 service provider for single sign on.
</p>
<p>
We added a <a href="https://github.com/emweb/wt/tree/master/examples/feature/saml" target="_blank">SAML</a>
feature example to demonstrate this.
</p>
<p>
Note: this implementation is based on <a href="https://www.shibboleth.net/" target="_blank">Shibboleth</a>'s
OpenSAML library. This library uses the Apache License Version 2.0. Due to incompatibility with the GNU General
Public License V2.0 used by Wt, <strong>a commercial Wt license is required to distribute derived works using SAML
authentication</strong>.
</p>
<h3>Other features and improvements</h3>
<ul>
<li>
It is now possible to suspend the <a href="classWt_1_1WApplication.html">WApplication</a> using the
<a href="classWt_1_1WApplication.html#a5c811d91d3999ac881ce87bebaade864">suspend</a> function. Previously,
logging in using an external authentication provider required a popup, but this can now be done through a redirect
(<a href="classWt_1_1Auth_1_1OAuthService.html#a72f987f61e7a53636ac3f08b61bee2a5">OAuthService::setPopupEnabled()</a>
and
<a href="classWt_1_1Auth_1_1Saml_1_1Service.html#a89ae3fb932497cbe28ed8b032d447966">Saml::Service::setPopupEnabled()</a>).
This can also be useful for redirecting to payment providers.
(See <a href="https://redmine.webtoolkit.eu/issues/7742" target="_blank">issue #7742</a> and
<a href="https://redmine.webtoolkit.eu/issues/9439" target="_blank">issue #9439</a>.)</li>
<li>
Added <a href="classWt_1_1WServer.html#a28794f657a950e81c17e2c11fe4270b1">WServer::docRoot()</a>, which allows
access to the <code>--docroot</code> argument of wthttp.
(See <a href="https://redmine.webtoolkit.eu/issues/9391" target="_blank">issue #9391</a>.)
</li>
<li>
The Bootstrap themes now no longer need an active <a href="classWt_1_1WApplication.html">WApplication</a>
upon construction to properly function, through the addition of an <a href="classWt_1_1WTheme.html#ae15f579e5dfb0d50e909fd5e2c575f60">init()</a> function.
(See <a href="https://redmine.webtoolkit.eu/issues/9204" target="_blank">issue #9204</a>.)
</li>
<li>The <a href="classWt_1_1WAbstractItemView.html">WAbstractItemView</a> now allows drag/drop in between rows.
See <a href="classWt_1_1WAbstractItemView.html#a5469c23ea1e9066e98e832ec9da2af21">setEnabledDropLocations()</a>.
(See <a href="https://redmine.webtoolkit.eu/issues/8636" target="_blank">issue #8636</a>.)</li>
<li>With the latest version of Visual Studio supporting std::chrono's date and time zone support it is now possible
to use it when building Wt in C++20 mode
(<code>-DCMAKE_CXX_STANDARD=20 -DWT_CPP20_DATE_TZ_IMPLEMENTATION=std</code>). This means that when Wt is compiled
this way time zone support just works on Windows like it already did on Linux, instead of requiring you to
download the IANA time zone database.
(See <a href="https://redmine.webtoolkit.eu/issues/8595" target="_blank">issue #8595</a>.)</li>
<li>Updated the <code>date</code> library to commit <code>fb2554a7e00b24d23838b57a4db4121e148edb5c</code>.</li>
<li>Ability to change the row header count of <a href="classWt_1_1WTableView.html" target="_blank">WTableView</a>
after it is rendered (see <a href="https://redmine.webtoolkit.eu/issues/8077" target="_blank">issue #8077</a>).</li>
<li>Splitting up updates to stay under the form data limit when many updates are rapidly generated
(<a href="https://redmine.webtoolkit.eu/issues/7990" target="_blank">issue #7990</a>).</li>
<li>Revert delay of <a href="classWt_1_1WWidget.html#a1ee433705523b2b79c4c3539e0852c92">WWidget::load()</a>.
Load now happens when a widget is added to the widget tree.
(See <a href="https://redmine.webtoolkit.eu/issues/7968" target="_blank">issue #7968</a>.)</li>
<li>Added option to not automatically select first suggestion of a
<a href="classWt_1_1WSuggestionPopup.html">WSuggestionPopup</a>.</li>
<li><a href="classWt_1_1Http_1_1Request.html#ad8a1199b8692854fefb76f494d793f93">Wt::Http::Request::hostName()</a>
now takes into account <code>X-Forwarded-Host</code>.</li>
<li>Updated the version of the included <code>SQLite</code> to version 3.35.5.</li>
<li>Added <code>doc/licenses.md</code> as an exhaustive list of the licenses used by Wt, source code from external
sources included in Wt and any external dependencies.</li>
</ul>
<h3>Bug fixes</h3>
<ul>
<li><a href="https://redmine.webtoolkit.eu/issues/8972" target="_blank">Issue #8972</a>: fixed a regression with
<a href="classWt_1_1WResource.html#a06bb9dbe3ae195c320cfed7b062d448a">WResource::setInternalPath()</a>.</li>
<li><a href="https://redmine.webtoolkit.eu/issues/8838" target="_blank">Issue #8838</a>:
<a href="classWt_1_1WIOService.html">WIOService</a> would block all signals in its worker threads. Now we let through
thread specific signals, so that signal handlers for them can be installed, e.g. by crashpad.
</li>
<li><a href="https://redmine.webtoolkit.eu/issues/8720" target="_blank">Issue #8720</a>:
fixed
<a href="classWt_1_1WServer.html#aa47d7a7af63b11ae5c49ea226401b5fa">WServer::dedicatedSessionProcess()</a>
so it's accurate after
<a href="classWt_1_1WServer.html#a6ef2c780a70eebc68707ea0d684b8509">WServer::setServerConfiguration()</a>.</li>
<li><a href="https://redmine.webtoolkit.eu/issues/8531" target="_blank">Issue #8531</a>:
fixed deletion/modification of remember me cookie when using websockets.</li>
<li><a href="https://redmine.webtoolkit.eu/issues/8518" target="_blank">Issue #8518</a>: fixed accessing freed memory
when <a href="classWt_1_1Dbo_1_1ptr.html">Wt::Dbo::ptr</a> exits at destruction of its session.</li>
<li><a href="https://redmine.webtoolkit.eu/issues/8392" target="_blank">Issue #8392</a>: fixed crash when using
<a href="classWt_1_1WToolBar.html#af18dca00ce4fb782c806272b6dfc1659">WToolBar::widget()</a>.</li>
<li><a href="https://redmine.webtoolkit.eu/issues/8336" target="_blank">Issue #8336</a>: fixed
<a href="classWt_1_1WNavigationBar.html">WNavigationBar</a> regression: popup menu remains selected.</li>
<li><a href="https://redmine.webtoolkit.eu/issues/8164" target="_blank">Issue #8164</a>: added protected copy
constructor to <a href="classWt_1_1WStandardItem.html">WStandardItem</a> to allow easier overriding of
<a href="classWt_1_1WStandardItem.html#a41a5f22630a4c876e3a4ba822c43a744">WStandardItem::clone()</a>.</li>
<li><a href="https://redmine.webtoolkit.eu/issues/8135" target="_blank">Issue #8135</a>:
<a href="classWt_1_1WMenu.html">WMenu</a> submenu selection not proparly propagated.</li>
<li><a href="https://redmine.webtoolkit.eu/issues/8025" target="_blank">Issue #8025</a>: text clipped in
<a href="classWt_1_1WRasterImage.html">WRasterImage</a> (GraphicsMagick) with Pango.</li>
<li><a href="https://redmine.webtoolkit.eu/issues/7811" target="_blank">Issue #7811</a>: invalid ackId.</li>
<li><a href="https://redmine.webtoolkit.eu/issues/7975" target="_blank">Issue #7975</a>: drag-drop icon under dialog.</li>
<li><a href="https://redmine.webtoolkit.eu/issues/8597" target="_blank">Issue #8597</a>: taking UpdateLock in
<a href="classWt_1_1WResource.html">WResource</a> sometimes fails.</li>
<li><a href="https://redmine.webtoolkit.eu/issues/8838" target="_blank">Issue #8838</a>: breakpad/crashpad signal
handler doesn't work in <a href="classWt_1_1WIOService.html">WIOService</a> threads.</li>
<li>Fixed <a href="classWt_1_1WString.html#a233225f344af1b4a090f4a4dd76ec53d">WString::empty()</a> returning false
for <code>Wt::WString("{1}").arg("")</code>.</li>
</ul>
<h2>Release 4.5.2 (December 14, 2021)</h2>
<p>Wt 4.5.2 is a bugfix release containing the following changes:</p>
<ul>
<li>
<a href="https://redmine.webtoolkit.eu/issues/9490" target="_blank">Issue #9490</a>: Fixed a possible
exception being thrown in the Postgres backend for Dbo when subnormal floating point numbers are retrieved
from the database.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/9414" target="_blank">Issue #9414</a>: Fixed an error that
occurred when trying to link <code>libwtdbosqlite3</code> on Fedora 35.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/9363" target="_blank">Issue #9363</a>: Added a workaround for
<a href="https://github.com/boostorg/spirit/issues/688" target="_blank">Boost Spirit issue #688</a>,
affecting versions of Boost ≥ 1.66.0.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/9270" target="_blank">Issue #9270</a>: Fixed a possible but
very rarely occurring race condition
in the generation of ids that would make it possible to have two widgets with the same id in the same
<a href="classWt_1_1WApplication.html">WApplication</a>.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/9230" target="_blank">Issue #9230</a>: Fixed an issue where the 3-argument version
of <a href="classWt_1_1Dbo_1_1QueryModel.html#ac225ba823673dc46e47811631e3218fe">QueryModel::setHeaderData</a>
was no longer accessible.
</li>
</ul>
<h2>Release 4.5.1 (October 7, 2021)</h2>
<p>Wt 4.5.1 is a bugfix release containing the following changes:</p>
<ul>
<li>
<a href="https://redmine.webtoolkit.eu/issues/9008" target="_blank">Issue #9008</a>:
Fixed possible JavaScript issues by appending a semicolon to all JavaScript statements when using
<a href="classWt_1_1WApplication.html#a2a92457b9212cef4057cb54e56183967">doJavaScript</a>.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/8964" target="_blank">Issue #8964</a>:
fixed Boost 1.77.0 compilation by modernizing the implementation of <code>WCssParser</code> to use
range-based for loops instead of <code>BOOST_FOREACH</code>.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/8677" target="_blank">Issue #8677</a>:
<a href="classWt_1_1WWidget.html#a5d403e0390841df77a23445b28044d5d">WWidget::setScrollVisibilityEnabled()</a>
now refers to the correct
<a href="https://github.com/emweb/wt/tree/master/examples/feature/scrollvisibility" target="_blank">scrollvisibility</a> example.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/8577" target="_blank">Issue #8577</a>:
fixed some tests in <code>test.http</code> related to the handling of
<code>X-Forwarded-For</code> and <code>Client-IP</code> headers.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/8467" target="_blank">Issue #8467</a>:
fixed compilation of <code>WTextRenderer.C</code> on some systems due to a missing <code>#include <limits></code>.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/8407" target="_blank">Issue #8407</a>:
fixed an issue in <a href="classWt_1_1WTreeView.html">WTreeView</a> where the expand icon was not removed
when removing the last child.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/8376" target="_blank">Issue #8376</a>:
made dragging and dropping icons work correctly in
<a href="classWt_1_1WAbstractItemView.html">WAbstractItemView</a> by
preventing the default action.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/8335" target="_blank">Issue #8335</a>:
fixed an issue where
<a href="classWt_1_1WWidget.html#af432588db3d599f89b54121f2ede8d63">WWidget::layoutSizeChanged()</a> would
sometimes not be called.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/8305" target="_blank">Issue #8305</a>:
fixed an issue that caused the
<a href="https://github.com/emweb/wt/tree/master/examples/style" target="_blank">style example</a>
to segfault.
<a href="classWt_1_1WRasterImage.html#a75dffbb4731d33ac6a2dc2fb8e9a4aec">WRasterImage::setChanged()</a> could
cause a crash if the image was not meant to be exposed as a resource.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/8202" target="_blank">Issue #8202</a>:
fixed an issue where
<a href="classWt_1_1WServer.html#afd61307d5d869cfecea239dac720a86d">WServer::postAll()</a>
would also be handled by sessions that were not fully complete yet, which meant that
<a href="classWt_1_1WApplication.html#a38d922da0a0d83395519f3eaab85d0f6">WApplication::instance()</a>
would return <code>nullptr</code>.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/8194" target="_blank">Issue #8194</a>:
fixed an issue where
<a href="classWt_1_1WVirtualImage.html">WVirtualImage</a> would break if you added a
<a href="classWt_1_1WInteractWidget.html#a40c3643603fa861b1ec797eec794aa4c">mouseMoved()</a> handler to images.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/8114" target="_blank">Issue #8114</a>:
fixed a possible JavaScript error in <a href="classWt_1_1WCanvasPaintDevice.html">WCanvasPaintDevice</a>
if an image load handler was executed after the painted widget was already removed.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/8041" target="_blank">Issue #8041</a>:
fixed an inconsistency in how ellipses were rendered when using
<a href="classWt_1_1WPainter.html#aa79220ed9456f67a393009e5c5eea27e">drawArc()</a> with
wide <a href="classWt_1_1WPen.html">WPen</a> on an HTML canvas.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/8039" target="_blank">Issue #8039</a>:
<a href="classWt_1_1WLocalDateTime.html#a08aaccd32fd329f4f696b07a060bcca1">WLocalDateTime::timeZoneOffset()</a> now throws if it was initialized without timezone
information, as opposed to crashing.
The <a href="https://github.com/emweb/wt/tree/master/examples/filetreetable" target="_blank">filetreetable example</a> was changed to use UTC so we don't need
timezones.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/7998" target="_blank">Issue #7998</a>:
made sure the scroll position is preserved when a <a href="classWt_1_1WTreeView.html">WTreeView</a>
is sorted.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/7996" target="_blank">Issue #7996</a>:
clarified the documentation of <a href="classWt_1_1WInteractWidget.html#ae11e050cce0d4a8f742afa3ef92bfe8c">WInteractWidget::clicked()</a>
to note that middle clicks do not emit the clicked event.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/7985" target="_blank">Issue #7985</a>:
re-exposed two argument version of
<a href="classWt_1_1WAbstractItemModel.html#a0bccbb4373b4c1e8bce85573b933d53d">WAbstractItemModel::setHeaderData()</a>
in <a href="classWt_1_1Dbo_1_1QueryModel.html">QueryModel</a>.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/7957" target="_blank">Issue #7957</a>:
fixed behind reverse proxy behavior when using dedicated process mode.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/7912" target="_blank">Issue #7912</a>:
fixed JavaScript errors when using <a href="classWt_1_1WPopupMenu.html">WPopupMenu</a>
in <a href="namespaceWt.html#af4b6ed5fd28b4f5fa141b153c1107349accf2281a355c2c9cd4698ac30bea7820">WidgetSet</a>
mode.
</li>
<li>
Added warning to the <a href="classWt_1_1WSuggestionPopup.html">WSuggestionPopup</a> documentation: this widget should not be bound to a template.
</li>
<li>
Added missing virtual destructor to <a href="classWt_1_1WLogSink.html">WLogSink</a> (contributed by Pavlo Solntsev).
</li>
<li>
Fixed an issue where the
<a href="classWt_1_1WWidget.html#aa5ce605dd465e06f3e3c2dbce2a4098e">scrollVisibilityChanged()</a>
signal would not always be created.
</li>
<li>
Fixed a compilation issue on Windows with the latest MSVC and Boost in
<code>WebUtils.C</code>.
</li>
<li>
Various fixes to make Wt build properly with C++20:
<ul>
<li>
<a href="https://redmine.webtoolkit.eu/issues/7002" target="_blank">Issue #7002</a>:
made tests build with the new <code>char8_t</code> type.
</li>
<li>
Fixed infinite recursion in <a href="classWt_1_1WString.html">WString</a> comparison operator.
</li>
<li>
Fixed compilation of <a href="classWt_1_1Dbo_1_1Transaction.html">Dbo::Transaction</a> due
to the removal of <code>uncaught_exception</code>.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/8022" target="_blank">Issue #8022</a>:
fixed a compilation issue due to ambiguous <code>local_time</code> symbol with MSVC when using
<code>/std:c++latest</code>.
</li>
</ul>
</li>
<li>
Contributions by Steven Köhler:
<ul>
<li>Fixed a "size is not a function" issue when using jQuery 3.x</li>
<li>Fixed a warning when using <code>DBO_EXTERN_TEMPLATES</code> and <code>DBO_INSTANTIATE_TEMPLATES</code>.</li>
<li>Resolved C++17 <code>std::iterator</code> deprecation issue in <code>Wt::Dbo</code>.</li>
<li>Fixed an access violation in <code>Dbo::collection<C>::iterator</code>.</li>
<li>Added the missing function definition for <code>Dbo::collection<C>::const_iterator::operator=</code>.</li>
<li>Resolved/suppressed some type conversion warnings in <a href="classWt_1_1Dbo_1_1collection.html">Dbo::collection</a>.</li>
</ul>
</li>
</ul>
<h2>Release 4.5.0 (December 15, 2020)</h2>
<h3>Notable changes</h3>
<ul>
<li>Wt now targets C++14, and <code>CMAKE_CXX_STANDARD</code> defaults to "14". There appears to
be no good reason to maintain C++11 support, since every compiler that supports enough C++11
for Wt also supports enough C++14. You should still be able to use C++11 mode when using Wt
as a library, but Wt itself no longer builds in C++11 mode.</li>
<li>Wt::Dbo: the <a href="classWt_1_1Dbo_1_1backend_1_1Firebird.html">Firebird</a> backend
has been marked as unmaintained. The Firebird tests were not succeeding, likely because
of an incompatibility with the unmaintained IBPP that the Firebird backend is based on
and recent versions of Firebird.</li>
</ul>
<h3>Features and improvements</h3>
<ul>
<li><a href="https://redmine.webtoolkit.eu/issues/7586" target="_blank">Issue #7586</a>:
The <code><behind-reverse-proxy></code> option has been deprecated in favor of a new
<code><trusted-proxy-config></code> option. It's now possible to specify the IP header
that Wt should look for using <code><remote-ip-header></code> (defaults to <code>X-Forwarded-For</code>).
Wt will trust all proxies listed in <code><trusted-proxies></code>.
When <code><behind-reverse-proxy></code> is set to <code>true</code>, the behavior stays the
same as it was before. <a href="overview.html#config_general">See the library overview for more
information about this option.</a>
</li>
<li>
<a href="classWt_1_1WFormModel.html">WFormModel</a> now uses string comparison instead of pointer comparison
for its fields.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/7666" target="_blank">Issue #7666</a>: In some cases Wt 4.4.0 would
connect <code>jsScrollVisibilityChanged</code> even if it was not actually being used, causing extra unnecessary
requests.
</li>
<li>
Added Jenkins pipelines in the
<code><a href="https://github.com/emweb/wt/tree/master/jenkins" target="_blank">jenkins</a></code> folder.
We use Jenkins to test Wt at Emweb but we would usually
keep this configuration in Jenkins. Our pipelines for Linux and FreeBSD have now been updated a bit and moved
into the Wt repository, since they may be of use to people looking to contribute to Wt.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/7669" target="_blank">Issue #7669</a>: Wt now automatically uses
<a href="classWt_1_1WObject.html#a3de0f0baf35f42aa4e77a90d427f2e11">addChild</a> instead of
<a href="classWt_1_1WContainerWidget.html#ad17b653b6f0487e42b2a63ab9de03f20">addWidget</a> when
<a href="classWt_1_1WContainerWidget.html#acf75dda5024db05cf847c282f8a99117">addNew</a> is used