Move QTextCodec support out of QtCore

* Assume UTF-8 on all Unix like systems
* Export some functions to be able to compile QTextCodec once
  moved to Qt5Compat.

Task-number: QTBUG-75665
Change-Id: I52ec47a848bc0ba72e9c7689668b1bcc5d736c29
Reviewed-by: Lars Knoll <lars.knoll@qt.io>

22 files changed, 0 insertions, 1258 deletions

diff --git a/examples/widgets/tools/.prev_CMakeLists.txt b/examples/widgets/tools/.prev_CMakeLists.txt
index d2fe6aa5ca..29e7f8f9e8 100644
--- a/examples/widgets/tools/.prev_CMakeLists.txt
+++ b/examples/widgets/tools/.prev_CMakeLists.txt
@@ -1,6 +1,5 @@
 # Generated from tools.pro.
 
-add_subdirectory(codecs)
 add_subdirectory(completer)
 add_subdirectory(customcompleter)
 add_subdirectory(regularexpression)
diff --git a/examples/widgets/tools/CMakeLists.txt b/examples/widgets/tools/CMakeLists.txt
index 80c8f43007..022f4a2b8f 100644
--- a/examples/widgets/tools/CMakeLists.txt
+++ b/examples/widgets/tools/CMakeLists.txt
@@ -1,6 +1,5 @@
 # Generated from tools.pro.
 
-add_subdirectory(codecs)
 add_subdirectory(completer)
 add_subdirectory(customcompleter)
 if(QT_FEATURE_translation) # special case
diff --git a/examples/widgets/tools/codecs/CMakeLists.txt b/examples/widgets/tools/codecs/CMakeLists.txt
deleted file mode 100644
index 7e2714fc4b..0000000000
--- a/examples/widgets/tools/codecs/CMakeLists.txt
+++ /dev/null
@@ -1,47 +0,0 @@
-# Generated from codecs.pro.
-
-cmake_minimum_required(VERSION 3.14)
-project(codecs LANGUAGES CXX)
-
-set(CMAKE_INCLUDE_CURRENT_DIR ON)
-
-set(CMAKE_AUTOMOC ON)
-set(CMAKE_AUTORCC ON)
-set(CMAKE_AUTOUIC ON)
-
-set(INSTALL_EXAMPLEDIR "examples/widgets/tools/codecs")
-
-find_package(Qt6 COMPONENTS Core)
-find_package(Qt6 COMPONENTS Gui)
-find_package(Qt6 COMPONENTS Widgets)
-
-add_qt_gui_executable(codecs
-    encodingdialog.cpp encodingdialog.h
-    main.cpp
-    mainwindow.cpp mainwindow.h
-    previewform.cpp previewform.h
-)
-target_link_libraries(codecs PUBLIC
-    Qt::Core
-    Qt::Gui
-    Qt::Widgets
-)
-
-
-# Resources:
-set(codecs_resource_files
-    "images/editcopy.png"
-)
-
-qt6_add_resources(codecs "codecs"
-    PREFIX
-        "/"
-    FILES
-        ${codecs_resource_files}
-)
-
-install(TARGETS codecs
-    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
-    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
-    LIBRARY DESTINATION "${INSTALL_EXAMPLEDIR}"
-)
diff --git a/examples/widgets/tools/codecs/codecs.pro b/examples/widgets/tools/codecs/codecs.pro
deleted file mode 100644
index 6f4b0742a9..0000000000
--- a/examples/widgets/tools/codecs/codecs.pro
+++ /dev/null
@@ -1,19 +0,0 @@
-QT += widgets
-requires(qtConfig(filedialog))
-
-HEADERS      += mainwindow.h \
-                previewform.h \
-                encodingdialog.h
-
-SOURCES      += main.cpp \
-                mainwindow.cpp \
-                previewform.cpp \
-                encodingdialog.cpp
-
-RESOURCES    += codecs.qrc
-
-EXAMPLE_FILES = encodedfiles
-
-# install
-target.path = $$[QT_INSTALL_EXAMPLES]/widgets/tools/codecs
-INSTALLS += target
diff --git a/examples/widgets/tools/codecs/codecs.qrc b/examples/widgets/tools/codecs/codecs.qrc
deleted file mode 100644
index 65fa1aa64d..0000000000
--- a/examples/widgets/tools/codecs/codecs.qrc
+++ /dev/null
@@ -1,5 +0,0 @@
-<RCC>
-    <qresource prefix="/" >
-        <file>images/editcopy.png</file>
-    </qresource>
-</RCC>
diff --git a/examples/widgets/tools/codecs/doc/images/codecs-example.png b/examples/widgets/tools/codecs/doc/images/codecs-example.png
deleted file mode 100644
index 8e7ae95317..0000000000
--- a/examples/widgets/tools/codecs/doc/images/codecs-example.png
+++ /dev/null
diff --git a/examples/widgets/tools/codecs/doc/src/codecs.qdoc b/examples/widgets/tools/codecs/doc/src/codecs.qdoc
deleted file mode 100644
index 78f4f7396b..0000000000
--- a/examples/widgets/tools/codecs/doc/src/codecs.qdoc
+++ /dev/null
@@ -1,38 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the documentation of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:FDL$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** GNU Free Documentation License Usage
-** Alternatively, this file may be used under the terms of the GNU Free
-** Documentation License version 1.3 as published by the Free Software
-** Foundation and appearing in the file included in the packaging of
-** this file. Please review the following information to ensure
-** the GNU Free Documentation License version 1.3 requirements
-** will be met: https://www.gnu.org/licenses/fdl-1.3.html.
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-/*!
-    \example tools/codecs
-    \title Text Codecs Example
-    \brief How to import and export text using text codecs.
-
-    The Text Codecs example demonstrates the principles behind importing and exporting text
-    using codecs to ensure that characters are encoded properly, avoiding loss of data
-    and retaining the correct symbols used in various scripts.
-
-    \image codecs-example.png
-*/
diff --git a/examples/widgets/tools/codecs/encodedfiles/iso-8859-1.txt b/examples/widgets/tools/codecs/encodedfiles/iso-8859-1.txt
deleted file mode 100644
index d7fcacae66..0000000000
--- a/examples/widgets/tools/codecs/encodedfiles/iso-8859-1.txt
+++ /dev/null
@@ -1,6 +0,0 @@
-Paulo Coelho: O Gênio e as Rosas
-Anna Hallström, Urban Östberg: Svår svenska
-Darrell Huff: How to Lie with Statistics
-Franz Kafka: Das Schloß
-Walter Moers: Die 13½ Leben des Käpt'n Blaubär
-Dag Solstad: Forsøk på å beskrive det ugjennomtrengelige
diff --git a/examples/widgets/tools/codecs/encodedfiles/iso-8859-15.txt b/examples/widgets/tools/codecs/encodedfiles/iso-8859-15.txt
deleted file mode 100644
index be2d83c98d..0000000000
--- a/examples/widgets/tools/codecs/encodedfiles/iso-8859-15.txt
+++ /dev/null
@@ -1,8 +0,0 @@
-Paulo Coelho: O Gênio e as Rosas
-Jean-Pierre Coffe: À table en famille avec 15 ¤ par jour
-Anna Hallström, Urban Östberg: Svår svenska
-Darrell Huff: How to Lie with Statistics
-Franz Kafka: Das Schloß
-Helena Lehecková: T¨ekkiä suomalaisille
-Arthur Rimbaud: ¼uvres complètes
-Dag Solstad: Forsøk på å beskrive det ugjennomtrengelige
diff --git a/examples/widgets/tools/codecs/encodedfiles/utf-16.txt b/examples/widgets/tools/codecs/encodedfiles/utf-16.txt
deleted file mode 100644
index 371f06f7fa..0000000000
--- a/examples/widgets/tools/codecs/encodedfiles/utf-16.txt
+++ /dev/null
diff --git a/examples/widgets/tools/codecs/encodedfiles/utf-16be.txt b/examples/widgets/tools/codecs/encodedfiles/utf-16be.txt
deleted file mode 100644
index d8ae6428bc..0000000000
--- a/examples/widgets/tools/codecs/encodedfiles/utf-16be.txt
+++ /dev/null
diff --git a/examples/widgets/tools/codecs/encodedfiles/utf-16le.txt b/examples/widgets/tools/codecs/encodedfiles/utf-16le.txt
deleted file mode 100644
index 3779264c7c..0000000000
--- a/examples/widgets/tools/codecs/encodedfiles/utf-16le.txt
+++ /dev/null
diff --git a/examples/widgets/tools/codecs/encodedfiles/utf-8.txt b/examples/widgets/tools/codecs/encodedfiles/utf-8.txt
deleted file mode 100644
index a5e4ae6fa7..0000000000
--- a/examples/widgets/tools/codecs/encodedfiles/utf-8.txt
+++ /dev/null
@@ -1,6 +0,0 @@
-Språk: Norsk
-Γλώσσα: Ελληνικά
-Язык: Ру��кий
-언어 : 한국어
-言語: 日本語
-Langage : Français
diff --git a/examples/widgets/tools/codecs/encodingdialog.cpp b/examples/widgets/tools/codecs/encodingdialog.cpp
deleted file mode 100644
index aa57d47dc7..0000000000
--- a/examples/widgets/tools/codecs/encodingdialog.cpp
+++ /dev/null
@@ -1,333 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2018 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the examples of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include "encodingdialog.h"
-
-#if QT_CONFIG(action)
-#  include <QAction>
-#endif
-#include <QDialogButtonBox>
-#include <QFormLayout>
-#include <QLabel>
-#include <QLineEdit>
-#include <QVBoxLayout>
-
-#if QT_CONFIG(clipboard)
-#  include <QGuiApplication>
-#  include <QClipboard>
-#endif
-
-#include <QTextStream>
-
-// Helpers for formatting character sequences
-
-// Format a special character like '\x0a'
-template <class Int>
-static void formatEscapedNumber(QTextStream &str, Int value, int base,
-                                int width = 0,char prefix = 0)
-{
-    str << '\\';
-    if (prefix)
-        str << prefix;
-    const auto oldPadChar = str.padChar();
-    const auto oldFieldWidth = str.fieldWidth();
-    const auto oldFieldAlignment = str.fieldAlignment();
-    const auto oldIntegerBase = str.integerBase();
-    str.setPadChar(QLatin1Char('0'));
-    str.setFieldWidth(width);
-    str.setFieldAlignment(QTextStream::AlignRight);
-    str.setIntegerBase(base);
-    str << value;
-    str.setIntegerBase(oldIntegerBase);
-    str.setFieldAlignment(oldFieldAlignment);
-    str.setFieldWidth(oldFieldWidth);
-    str.setPadChar(oldPadChar);
-}
-
-template <class Int>
-static bool formatSpecialCharacter(QTextStream &str, Int value)
-{
-    bool result = true;
-    switch (value) {
-    case '\\':
-        str << "\\\\";
-        break;
-    case '\"':
-        str << "\\\"";
-        break;
-    case '\n':
-        str << "\\n";
-        break;
-    default:
-        result = false;
-        break;
-    }
-    return result;
-}
-
-// Format a sequence of characters (QChar, ushort (UTF-16), uint (UTF-32)
-// or just char (Latin1, Utf-8)) with the help of traits specifying
-// how to obtain the code for checking the printable-ness and how to
-// stream out the plain ASCII values.
-
-template <EncodingDialog::Encoding>
-struct FormattingTraits
-{
-};
-
-template <>
-struct FormattingTraits<EncodingDialog::Unicode>
-{
-    static ushort code(QChar c) { return c.unicode(); }
-    static char toAscii(QChar c) { return c.toLatin1(); }
-};
-
-template <>
-struct FormattingTraits<EncodingDialog::Utf8>
-{
-    static ushort code(char c) { return uchar(c); }
-    static char toAscii(char c) { return c; }
-};
-
-template <>
-struct FormattingTraits<EncodingDialog::Utf16>
-{
-    static ushort code(ushort c) { return c; }
-    static char toAscii(ushort c) { return char(c); }
-};
-
-template <>
-struct FormattingTraits<EncodingDialog::Utf32>
-{
-    static uint code(uint c) { return c; }
-    static char toAscii(uint c) { return char(c); }
-};
-
-template <>
-struct FormattingTraits<EncodingDialog::Latin1>
-{
-    static uchar code(char c) { return uchar(c); }
-    static char toAscii(char  c) { return c; }
-};
-
-static bool isHexDigit(char c)
-{
-    return (c >= '0' && c <= '9') || (c >= 'a' && c <= 'f')
-        || (c >= 'A' && c <= 'F');
-}
-
-template <EncodingDialog::Encoding encoding, class Iterator>
-static void formatStringSequence(QTextStream &str, Iterator i1, Iterator i2,
-                                 int escapeIntegerBase, int escapeWidth,
-                                 char escapePrefix = 0)
-{
-    str << '"';
-    bool separateHexEscape = false;
-    for (; i1 != i2; ++i1) {
-        const auto code = FormattingTraits<encoding>::code(*i1);
-        if (code >= 0x80) {
-            formatEscapedNumber(str, code, escapeIntegerBase, escapeWidth, escapePrefix);
-            separateHexEscape = escapeIntegerBase == 16 && escapeWidth == 0;
-        } else {
-            if (!formatSpecialCharacter(str, code)) {
-                const char c = FormattingTraits<encoding>::toAscii(*i1);
-                // For variable width/hex: Terminate the literal to stop digit parsing
-                // ("\x12" "34...").
-                if (separateHexEscape && isHexDigit(c))
-                    str << "\" \"";
-                str << c;
-            }
-            separateHexEscape = false;
-        }
-    }
-    str << '"';
-}
-
-static QString encodedString(const QString &value, EncodingDialog::Encoding e)
-{
-    QString result;
-    QTextStream str(&result);
-    switch (e) {
-    case EncodingDialog::Unicode:
-        formatStringSequence<EncodingDialog::Unicode>(str, value.cbegin(), value.cend(),
-                                                      16, 4, 'u');
-        break;
-    case EncodingDialog::Utf8: {
-        const QByteArray utf8 = value.toUtf8();
-        str << "u8";
-        formatStringSequence<EncodingDialog::Utf8>(str, utf8.cbegin(), utf8.cend(),
-                                                   8, 3);
-    }
-        break;
-    case EncodingDialog::Utf16: {
-        auto utf16 = value.utf16();
-        auto utf16End = utf16 + value.size();
-        str << 'u';
-        formatStringSequence<EncodingDialog::Utf16>(str, utf16, utf16End,
-                                                    16, 0, 'x');
-    }
-        break;
-    case EncodingDialog::Utf32: {
-        auto utf32 = value.toUcs4();
-        str << 'U';
-        formatStringSequence<EncodingDialog::Utf32>(str, utf32.cbegin(), utf32.cend(),
-                                                    16, 0, 'x');
-    }
-        break;
-    case EncodingDialog::Latin1: {
-        const QByteArray latin1 = value.toLatin1();
-        formatStringSequence<EncodingDialog::Latin1>(str, latin1.cbegin(), latin1.cend(),
-                                                     16, 0, 'x');
-    }
-        break;
-    case EncodingDialog::EncodingCount:
-        break;
-    }
-    return result;
-}
-
-// Dialog helpers
-
-static const char *encodingLabels[]
-{
-    QT_TRANSLATE_NOOP("EncodingDialog", "Unicode:"),
-    QT_TRANSLATE_NOOP("EncodingDialog", "UTF-8:"),
-    QT_TRANSLATE_NOOP("EncodingDialog", "UTF-16:"),
-    QT_TRANSLATE_NOOP("EncodingDialog", "UTF-32:"),
-    QT_TRANSLATE_NOOP("EncodingDialog", "Latin1:")
-};
-
-static const char *encodingToolTips[]
-{
-    QT_TRANSLATE_NOOP("EncodingDialog", "Unicode points for use with any encoding (C++, Python)"),
-    QT_TRANSLATE_NOOP("EncodingDialog", "QString::fromUtf8()"),
-    QT_TRANSLATE_NOOP("EncodingDialog", "wchar_t on Windows, char16_t everywhere"),
-    QT_TRANSLATE_NOOP("EncodingDialog", "wchar_t on Unix (Ucs4)"),
-    QT_TRANSLATE_NOOP("EncodingDialog", "QLatin1String")
-};
-
-// A read-only line edit with a tool button to copy the contents
-class DisplayLineEdit : public QLineEdit
-{
-    Q_OBJECT
-public:
-    explicit DisplayLineEdit(const QIcon &icon, QWidget *parent = nullptr);
-
-public slots:
-    void copyAll();
-};
-
-DisplayLineEdit::DisplayLineEdit(const QIcon &icon, QWidget *parent) :
-    QLineEdit(parent)
-{
-    setReadOnly(true);
-#if QT_CONFIG(clipboard) && QT_CONFIG(action)
-    auto copyAction = addAction(icon, QLineEdit::TrailingPosition);
-    connect(copyAction, &QAction::triggered, this, &DisplayLineEdit::copyAll);
-#endif
-}
-
-void DisplayLineEdit::copyAll()
-{
-#if QT_CONFIG(clipboard)
-    QGuiApplication::clipboard()->setText(text());
-#endif
-}
-
-static void addFormLayoutRow(QFormLayout *formLayout, const QString &text,
-                             QWidget *w, const QString &toolTip)
-{
-    auto label = new QLabel(text);
-    label->setToolTip(toolTip);
-    w->setToolTip(toolTip);
-    label->setBuddy(w);
-    formLayout->addRow(label, w);
-}
-
-EncodingDialog::EncodingDialog(QWidget *parent) :
-    QDialog(parent)
-{
-    setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
-    setWindowTitle(tr("Encodings"));
-
-    auto formLayout = new QFormLayout;
-    auto sourceLineEdit = new QLineEdit(this);
-    sourceLineEdit->setClearButtonEnabled(true);
-    connect(sourceLineEdit, &QLineEdit::textChanged, this, &EncodingDialog::textChanged);
-
-    addFormLayoutRow(formLayout, tr("&Source:"), sourceLineEdit, tr("Enter text"));
-
-    const auto copyIcon = QIcon::fromTheme(QLatin1String("edit-copy"),
-                                           QIcon(QLatin1String(":/images/editcopy")));
-    for (int i = 0; i < EncodingCount; ++i) {
-        m_lineEdits[i] = new DisplayLineEdit(copyIcon, this);
-        addFormLayoutRow(formLayout, tr(encodingLabels[i]),
-                         m_lineEdits[i], tr(encodingToolTips[i]));
-    }
-
-    auto mainLayout = new QVBoxLayout(this);
-    mainLayout->addLayout(formLayout);
-    auto buttonBox = new QDialogButtonBox(QDialogButtonBox::Close);
-    connect(buttonBox, &QDialogButtonBox::rejected, this, &QDialog::reject);
-    mainLayout->addWidget(buttonBox);
-}
-
-void EncodingDialog::textChanged(const QString &t)
-{
-    if (t.isEmpty()) {
-        for (auto lineEdit : m_lineEdits)
-            lineEdit->clear();
-    } else {
-         for (int i = 0; i < EncodingCount; ++i)
-             m_lineEdits[i]->setText(encodedString(t, static_cast<Encoding>(i)));
-    }
-}
-
-#include "encodingdialog.moc"
diff --git a/examples/widgets/tools/codecs/encodingdialog.h b/examples/widgets/tools/codecs/encodingdialog.h
deleted file mode 100644
index 3f82da84af..0000000000
--- a/examples/widgets/tools/codecs/encodingdialog.h
+++ /dev/null
@@ -1,73 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2018 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the examples of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#ifndef ENCODINGDIALOG_H
-#define ENCODINGDIALOG_H
-
-#include <QDialog>
-
-QT_FORWARD_DECLARE_CLASS(QLineEdit)
-
-class EncodingDialog : public QDialog
-{
-    Q_OBJECT
-public:
-    explicit EncodingDialog(QWidget *parent = nullptr);
-
-    enum Encoding { Unicode, Utf8, Utf16, Utf32, Latin1, EncodingCount };
-
-private slots:
-    void textChanged(const QString &t);
-
-private:
-    QLineEdit *m_lineEdits[EncodingCount];
-};
-
-#endif // ENCODINGDIALOG_H
diff --git a/examples/widgets/tools/codecs/images/editcopy.png b/examples/widgets/tools/codecs/images/editcopy.png
deleted file mode 100644
index 1121b47d8b..0000000000
--- a/examples/widgets/tools/codecs/images/editcopy.png
+++ /dev/null
diff --git a/examples/widgets/tools/codecs/main.cpp b/examples/widgets/tools/codecs/main.cpp
deleted file mode 100644
index ced1069dcb..0000000000
--- a/examples/widgets/tools/codecs/main.cpp
+++ /dev/null
@@ -1,61 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the examples of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include <QApplication>
-
-#include "mainwindow.h"
-
-int main(int argc, char *argv[])
-{
-    QApplication app(argc, argv);
-    MainWindow mainWin;
-    mainWin.show();
-    return app.exec();
-}
diff --git a/examples/widgets/tools/codecs/mainwindow.cpp b/examples/widgets/tools/codecs/mainwindow.cpp
deleted file mode 100644
index 2379eaf5cc..0000000000
--- a/examples/widgets/tools/codecs/mainwindow.cpp
+++ /dev/null
@@ -1,225 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the examples of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include "mainwindow.h"
-#include "encodingdialog.h"
-#include "previewform.h"
-
-#include <QAction>
-#include <QApplication>
-#include <QFileDialog>
-#include <QMenuBar>
-#include <QMessageBox>
-#include <QPlainTextEdit>
-#include <QRegularExpression>
-#include <QScreen>
-#include <QTextCodec>
-#include <QTextStream>
-
-MainWindow::MainWindow()
-{
-    textEdit = new QPlainTextEdit;
-    textEdit->setLineWrapMode(QPlainTextEdit::NoWrap);
-    setCentralWidget(textEdit);
-
-    findCodecs();
-
-    previewForm = new PreviewForm(this);
-    previewForm->setCodecList(codecs);
-
-    createMenus();
-
-    setWindowTitle(tr("Codecs"));
-
-    const QRect screenGeometry = screen()->geometry();
-    resize(screenGeometry.width() / 2, screenGeometry.height() * 2 / 3);
-}
-
-void MainWindow::open()
-{
-    const QString fileName = QFileDialog::getOpenFileName(this);
-    if (fileName.isEmpty())
-        return;
-    QFile file(fileName);
-    if (!file.open(QFile::ReadOnly)) {
-        QMessageBox::warning(this, tr("Codecs"),
-                             tr("Cannot read file %1:\n%2")
-                             .arg(QDir::toNativeSeparators(fileName),
-                                  file.errorString()));
-        return;
-    }
-
-    const QByteArray data = file.readAll();
-
-    previewForm->setWindowTitle(tr("Choose Encoding for %1").arg(QFileInfo(fileName).fileName()));
-    previewForm->setEncodedData(data);
-    if (previewForm->exec())
-        textEdit->setPlainText(previewForm->decodedString());
-}
-
-void MainWindow::save()
-{
-    const QAction *action = qobject_cast<const QAction *>(sender());
-    const QByteArray codecName = action->data().toByteArray();
-    const QString title = tr("Save As (%1)").arg(QLatin1String(codecName));
-
-    QString fileName = QFileDialog::getSaveFileName(this, title);
-    if (fileName.isEmpty())
-        return;
-    QFile file(fileName);
-    if (!file.open(QFile::WriteOnly | QFile::Text)) {
-        QMessageBox::warning(this, tr("Codecs"),
-                             tr("Cannot write file %1:\n%2")
-                             .arg(QDir::toNativeSeparators(fileName),
-                                  file.errorString()));
-        return;
-    }
-
-    QTextCodec *codec = QTextCodec::codecForName(codecName.constData());
-    QByteArray text = codec->fromUnicode(textEdit->toPlainText());
-    file.write(text);
-}
-
-void MainWindow::about()
-{
-    QMessageBox::about(this, tr("About Codecs"),
-            tr("The <b>Codecs</b> example demonstrates how to read and write "
-               "files using various encodings."));
-}
-
-void MainWindow::aboutToShowSaveAsMenu()
-{
-    const QString currentText = textEdit->toPlainText();
-    for (QAction *action : qAsConst(saveAsActs)) {
-        const QByteArray codecName = action->data().toByteArray();
-        const QTextCodec *codec = QTextCodec::codecForName(codecName);
-        action->setVisible(codec && codec->canEncode(currentText));
-    }
-}
-
-void MainWindow::findCodecs()
-{
-    QMap<QString, QTextCodec *> codecMap;
-    QRegularExpression iso8859RegExp("^ISO[- ]8859-([0-9]+).*$");
-    QRegularExpressionMatch match;
-
-    const QList<int> mibs = QTextCodec::availableMibs();
-    for (int mib : mibs) {
-        QTextCodec *codec = QTextCodec::codecForMib(mib);
-
-        QString sortKey = codec->name().toUpper();
-        char rank;
-
-        if (sortKey.startsWith(QLatin1String("UTF-8"))) {
-            rank = 1;
-        } else if (sortKey.startsWith(QLatin1String("UTF-16"))) {
-            rank = 2;
-        } else if ((match = iso8859RegExp.match(sortKey)).hasMatch()) {
-            if (match.capturedView(1).size() == 1)
-                rank = 3;
-            else
-                rank = 4;
-        } else {
-            rank = 5;
-        }
-        sortKey.prepend(QLatin1Char('0' + rank));
-
-        codecMap.insert(sortKey, codec);
-    }
-    for (const auto &codec : qAsConst(codecMap))
-      codecs += codec;
-}
-
-void MainWindow::createMenus()
-{
-    QMenu *fileMenu = menuBar()->addMenu(tr("&File"));
-    QAction *openAct =
-        fileMenu->addAction(tr("&Open..."), this, &MainWindow::open);
-    openAct->setShortcuts(QKeySequence::Open);
-
-    QMenu *saveAsMenu = fileMenu->addMenu(tr("&Save As"));
-    connect(saveAsMenu, &QMenu::aboutToShow,
-            this, &MainWindow::aboutToShowSaveAsMenu);
-    for (const QTextCodec *codec : qAsConst(codecs)) {
-        const QByteArray name = codec->name();
-        QAction *action = saveAsMenu->addAction(tr("%1...").arg(QLatin1String(name)));
-        action->setData(QVariant(name));
-        connect(action, &QAction::triggered, this, &MainWindow::save);
-        saveAsActs.append(action);
-    }
-
-    fileMenu->addSeparator();
-    QAction *exitAct = fileMenu->addAction(tr("E&xit"), this, &QWidget::close);
-    exitAct->setShortcuts(QKeySequence::Quit);
-
-    auto toolMenu =  menuBar()->addMenu(tr("&Tools"));
-    auto encodingAction = toolMenu->addAction(tr("Encodings"), this, &MainWindow::encodingDialog);
-    encodingAction->setShortcut(Qt::CTRL + Qt::Key_E);
-    encodingAction->setToolTip(tr("Shows a dialog allowing to convert to common encoding in programming languages."));
-
-
-    menuBar()->addSeparator();
-
-    QMenu *helpMenu = menuBar()->addMenu(tr("&Help"));
-    helpMenu->addAction(tr("&About"), this, &MainWindow::about);
-    helpMenu->addAction(tr("About &Qt"), qApp, &QApplication::aboutQt);
-}
-
-void MainWindow::encodingDialog()
-{
-    if (!m_encodingDialog) {
-        m_encodingDialog = new EncodingDialog(this);
-        const QRect screenGeometry = screen()->geometry();
-        m_encodingDialog->setMinimumWidth(screenGeometry.width() / 4);
-    }
-    m_encodingDialog->show();
-    m_encodingDialog->raise();
-
-}
diff --git a/examples/widgets/tools/codecs/mainwindow.h b/examples/widgets/tools/codecs/mainwindow.h
deleted file mode 100644
index cf18222520..0000000000
--- a/examples/widgets/tools/codecs/mainwindow.h
+++ /dev/null
@@ -1,91 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the examples of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#ifndef MAINWINDOW_H
-#define MAINWINDOW_H
-
-#include <QVector>
-#include <QMainWindow>
-
-QT_BEGIN_NAMESPACE
-class QAction;
-class QTextCodec;
-class QPlainTextEdit;
-QT_END_NAMESPACE
-
-class EncodingDialog;
-class PreviewForm;
-
-class MainWindow : public QMainWindow
-{
-    Q_OBJECT
-
-public:
-    MainWindow();
-
-private slots:
-    void open();
-    void save();
-    void about();
-    void aboutToShowSaveAsMenu();
-    void encodingDialog();
-
-private:
-    void findCodecs();
-    void createMenus();
-
-    QVector<QAction *> saveAsActs;
-    QPlainTextEdit *textEdit;
-    PreviewForm *previewForm;
-    QVector<QTextCodec *> codecs;
-    EncodingDialog *m_encodingDialog = nullptr;
-};
-
-#endif
diff --git a/examples/widgets/tools/codecs/previewform.cpp b/examples/widgets/tools/codecs/previewform.cpp
deleted file mode 100644
index 80a99bf271..0000000000
--- a/examples/widgets/tools/codecs/previewform.cpp
+++ /dev/null
@@ -1,248 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the examples of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include "previewform.h"
-
-#include <QApplication>
-#include <QComboBox>
-#include <QDialogButtonBox>
-#include <QGridLayout>
-#include <QLabel>
-#include <QPlainTextEdit>
-#include <QPushButton>
-#include <QScreen>
-#include <QTextCodec>
-#include <QTextStream>
-
-// Helpers for creating hex dumps
-static void indent(QTextStream &str, int indent)
-{
-    for (int i = 0; i < indent; ++i)
-        str << ' ';
-}
-
-static void formatHex(QTextStream &str, const QByteArray &data)
-{
-    const int fieldWidth = str.fieldWidth();
-    const QTextStream::FieldAlignment alignment = str.fieldAlignment();
-    const int base = str.integerBase();
-    const QChar padChar = str.padChar();
-    str.setIntegerBase(16);
-    str.setPadChar(QLatin1Char('0'));
-    str.setFieldAlignment(QTextStream::AlignRight);
-
-    const unsigned char *p = reinterpret_cast<const unsigned char *>(data.constBegin());
-    for (const unsigned char *end = p + data.size(); p < end; ++p) {
-        str << ' ';
-        str.setFieldWidth(2);
-        str << unsigned(*p);
-        str.setFieldWidth(fieldWidth);
-    }
-    str.setFieldAlignment(alignment);
-    str.setPadChar(padChar);
-    str.setIntegerBase(base);
-}
-
-static void formatPrintableCharacters(QTextStream &str, const QByteArray &data)
-{
-    for (const char c : data) {
-        switch (c) {
-        case '\0':
-            str << "\\0";
-            break;
-        case '\t':
-            str << "\\t";
-            break;
-        case '\r':
-            str << "\\r";
-            break;
-        case '\n':
-            str << "\\n";
-            break;
-        default:
-            if (c >= 32 && uchar(c) < 127)
-                str << ' ' << c;
-            else
-                str << "..";
-            break;
-        }
-    }
-}
-
-static QString formatHexDump(const QByteArray &data)
-{
-    enum { lineWidth = 16 };
-    QString result;
-    QTextStream str(&result);
-    str.setIntegerBase(16);
-    str.setPadChar(QLatin1Char('0'));
-    const int fieldWidth = str.fieldWidth();
-    const QTextStream::FieldAlignment alignment = str.fieldAlignment();
-    for (int a = 0, size = data.size(); a < size; a += lineWidth) {
-        str.setFieldAlignment(QTextStream::AlignRight);
-        str.setFieldWidth(8);
-        str << a;
-        str.setFieldWidth(fieldWidth);
-        str.setFieldAlignment(alignment);
-
-        const int end = qMin(a + lineWidth, size);
-        const QByteArray line = data.mid(a, end - a);
-
-        formatHex(str, line);
-        indent(str, 3 * (lineWidth - line.size()));
-
-        str << ' ';
-        formatPrintableCharacters(str, line);
-        indent(str, 2 * (lineWidth - line.size()));
-        str << '\n';
-    }
-    return result;
-}
-
-PreviewForm::PreviewForm(QWidget *parent)
-    : QDialog(parent)
-{
-    setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
-    encodingComboBox = new QComboBox;
-
-    QLabel *encodingLabel = new QLabel(tr("&Encoding:"));
-    encodingLabel->setBuddy(encodingComboBox);
-
-    textEdit = new QPlainTextEdit;
-    textEdit->setLineWrapMode(QPlainTextEdit::NoWrap);
-    textEdit->setReadOnly(true);
-    hexDumpEdit = new QPlainTextEdit;
-    hexDumpEdit->setLineWrapMode(QPlainTextEdit::NoWrap);
-    hexDumpEdit->setReadOnly(true);
-    hexDumpEdit->setFont(QFontDatabase::systemFont(QFontDatabase::FixedFont));
-
-    QDialogButtonBox *buttonBox =
-        new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel);
-    okButton = buttonBox->button(QDialogButtonBox::Ok);
-
-    connect(encodingComboBox, &QComboBox::activated,
-            this, &PreviewForm::updateTextEdit);
-    connect(buttonBox, &QDialogButtonBox::accepted, this, &QDialog::accept);
-    connect(buttonBox, &QDialogButtonBox::rejected, this, &QDialog::reject);
-
-    QGridLayout *mainLayout = new QGridLayout(this);
-    mainLayout->addWidget(encodingLabel, 0, 0);
-    mainLayout->addWidget(encodingComboBox, 0, 1);
-    tabWidget = new QTabWidget;
-    tabWidget->addTab(textEdit, tr("Preview"));
-    tabWidget->addTab(hexDumpEdit, tr("Hex Dump"));
-    mainLayout->addWidget(tabWidget, 1, 0, 1, 2);
-    statusLabel = new QLabel;
-    mainLayout->addWidget(statusLabel, 2, 0, 1, 2);
-    mainLayout->addWidget(buttonBox, 3, 0, 1, 2);
-
-    const QRect screenGeometry = screen()->geometry();
-    resize(screenGeometry.width() * 2 / 5, screenGeometry.height() / 2);
-}
-
-void PreviewForm::setCodecList(const QVector<QTextCodec *> &list)
-{
-    encodingComboBox->clear();
-    for (const QTextCodec *codec : list) {
-        encodingComboBox->addItem(QLatin1String(codec->name()),
-                                  QVariant(codec->mibEnum()));
-    }
-}
-
-void PreviewForm::reset()
-{
-    decodedStr.clear();
-    textEdit->clear();
-    hexDumpEdit->clear();
-    statusLabel->clear();
-    statusLabel->setStyleSheet(QString());
-    okButton->setEnabled(false);
-    tabWidget->setCurrentIndex(0);
-}
-
-void PreviewForm::setEncodedData(const QByteArray &data)
-{
-    reset();
-    encodedData = data;
-    hexDumpEdit->setPlainText(formatHexDump(data));
-    updateTextEdit();
-}
-
-void PreviewForm::updateTextEdit()
-{
-    int mib = encodingComboBox->itemData(
-                      encodingComboBox->currentIndex()).toInt();
-    const QTextCodec *codec = QTextCodec::codecForMib(mib);
-    const QString name = QLatin1String(codec->name());
-
-    QTextCodec::ConverterState state;
-    decodedStr = codec->toUnicode(encodedData.constData(), encodedData.size(), &state);
-
-    bool success = true;
-    if (state.remainingChars) {
-        success = false;
-        const QString message =
-            tr("%1: conversion error at character %2")
-            .arg(name).arg(encodedData.size() - state.remainingChars + 1);
-        statusLabel->setText(message);
-        statusLabel->setStyleSheet(QStringLiteral("background-color: \"red\";"));
-    } else if (state.invalidChars) {
-        statusLabel->setText(tr("%1: %n invalid characters", nullptr, state.invalidChars).arg(name));
-        statusLabel->setStyleSheet(QStringLiteral("background-color: \"yellow\";"));
-    } else {
-        statusLabel->setText(tr("%1: %n bytes converted", nullptr, encodedData.size()).arg(name));
-        statusLabel->setStyleSheet(QString());
-    }
-    if (success)
-        textEdit->setPlainText(decodedStr);
-    else
-        textEdit->clear();
-    okButton->setEnabled(success);
-}
diff --git a/examples/widgets/tools/codecs/previewform.h b/examples/widgets/tools/codecs/previewform.h
deleted file mode 100644
index 02eb3533f3..0000000000
--- a/examples/widgets/tools/codecs/previewform.h
+++ /dev/null
@@ -1,95 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the examples of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#ifndef PREVIEWFORM_H
-#define PREVIEWFORM_H
-
-#include <QDialog>
-#include <QVector>
-
-QT_BEGIN_NAMESPACE
-class QComboBox;
-class QDialogButtonBox;
-class QLabel;
-class QPlainTextEdit;
-class QPushButton;
-class QTabWidget;
-class QTextCodec;
-QT_END_NAMESPACE
-
-class PreviewForm : public QDialog
-{
-    Q_OBJECT
-
-public:
-    explicit PreviewForm(QWidget *parent = nullptr);
-
-    void setCodecList(const QVector<QTextCodec *> &list);
-    void setEncodedData(const QByteArray &data);
-    QString decodedString() const { return decodedStr; }
-
-private slots:
-    void updateTextEdit();
-
-private:
-    void reset();
-
-    QByteArray encodedData;
-    QString decodedStr;
-
-    QPushButton *okButton;
-    QTabWidget *tabWidget;
-    QComboBox *encodingComboBox;
-    QPlainTextEdit *textEdit;
-    QPlainTextEdit *hexDumpEdit;
-    QLabel *statusLabel;
-};
-
-#endif
diff --git a/examples/widgets/tools/tools.pro b/examples/widgets/tools/tools.pro
index 0e572a632b..d2a02deb6b 100644
--- a/examples/widgets/tools/tools.pro
+++ b/examples/widgets/tools/tools.pro
@@ -1,6 +1,5 @@
 TEMPLATE      = subdirs
 SUBDIRS       = \
-                codecs \
                 completer \
                 customcompleter \
                 echoplugin \