Move styles example to manual test

Pick-to: 6.5 6.6
Change-Id: I5738932c0c498ce2075a399274e3b80a04ad9211
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>

13 files changed, 0 insertions, 1253 deletions

diff --git a/examples/widgets/doc/src/styles.qdoc b/examples/widgets/doc/src/styles.qdoc
deleted file mode 100644
index 19ac0ee452..0000000000
--- a/examples/widgets/doc/src/styles.qdoc
+++ /dev/null
@@ -1,448 +0,0 @@
-// Copyright (C) 2016 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GFDL-1.3-no-invariants-only
-
-/*!
-    \example widgets/styles
-    \title Styles Example
-    \ingroup examples-widgets
-    \brief The Styles example illustrates how to create custom widget
-    drawing styles using Qt, and demonstrates Qt's predefined styles.
-
-    \borderedimage styles-enabledwood.png
-    \caption Screenshot of the Styles example
-
-    A style in Qt is a subclass of QStyle or of one of its
-    subclasses. Styles perform drawing on behalf of widgets. Qt
-    provides a whole range of predefined styles, either built into
-    the Qt Widgets module or found in plugins. Styles are usually
-    customized by subclassing QProxyStyle and reimplementing a few
-    virtual functions. While QProxyStyle provides a transparent way
-    to customize either a specific style or the appropriate platform's
-    default style, Qt also provides QCommonStyle as a convenient base
-    for full custom style implementations.
-
-    In this example, the custom style is called \c NorwegianWoodStyle
-    and derives from QProxyStyle. Its main features are the wooden
-    textures used for filling most of the widgets and its round
-    buttons and comboboxes.
-
-    To implement the style, we use some advanced features provided by
-    QPainter, such as \l{QPainter::Antialiasing}{antialiasing} (to
-    obtain smoother button edges), \l{QColor::alpha()}{alpha blending}
-    (to make the buttons appeared raised or sunken), and
-    \l{QPainterPath}{painter paths} (to fill the buttons and draw the
-    outline). We also use many features of QBrush and QPalette.
-
-    The example consists of the following classes:
-
-    \list
-    \li \c NorwegianWoodStyle inherits from QProxyStyle and implements
-        the Norwegian Wood style.
-    \li \c WidgetGallery is a \c QDialog subclass that shows the most
-       common widgets and allows the user to switch style
-       dynamically.
-    \endlist
-
-    \section1 NorwegianWoodStyle Class Definition
-
-    Here's the definition of the \c NorwegianWoodStyle class:
-
-    \snippet widgets/styles/norwegianwoodstyle.h 0
-
-    The public functions are all declared in QStyle (QProxyStyle's
-    grandparent class) and reimplemented here to override the Windows
-    look and feel. The private functions are helper functions.
-
-    \section1 NorwegianWoodStyle Class Implementation
-
-    We will now review the implementation of the \c
-    NorwegianWoodStyle class.
-
-    \snippet widgets/styles/norwegianwoodstyle.cpp 0
-
-    The \c standardPalette() function is reimplemented from QStyle.
-    It returns a QPalette with the style's preferred colors and textures.
-    Most styles don't need to reimplement that function. The
-    Norwegian Wood style reimplements it to set a "wooden" palette.
-
-    We start by defining a few \l{QColor}s that we'll need. Then we
-    load two PNG images. The \c : prefix in the file path indicates
-    that the PNG files are \l{The Qt Resource System}{embedded
-    resources}.
-
-    \table
-    \row \li \inlineimage widgets/styles/images/woodbackground.png
-
-         \li \b{woodbackground.png}
-
-            This texture is used as the background of most widgets.
-            The wood pattern is horizontal.
-
-    \row \li \inlineimage widgets/styles/images/woodbutton.png
-
-         \li \b{woodbutton.png}
-
-            This texture is used for filling push buttons and
-            comboboxes. The wood pattern is vertical and more reddish
-            than the texture used for the background.
-    \endtable
-
-    The \c midImage variable is initialized to be the same as \c
-    buttonImage, but then we use a QPainter and fill it with a 25%
-    opaque black color (a black with an \l{QColor::alpha()}{alpha
-    channel} of 63). The result is a somewhat darker image than \c
-    buttonImage. This image will be used for filling buttons that the
-    user is holding down.
-
-    \snippet widgets/styles/norwegianwoodstyle.cpp 1
-
-    We initialize the palette. Palettes have various
-    \l{QPalette::ColorRole}{color roles}, such as QPalette::Base
-    (used for filling text editors, item views, etc.), QPalette::Text
-    (used for foreground text), and QPalette::Window (used for
-    the background of most widgets). Each role has its own QBrush,
-    which usually is a plain color but can also be a brush pattern or
-    even a texture (a QPixmap).
-
-    In addition to the roles, palettes have several
-    \l{QPalette::ColorGroup}{color groups}: active, disabled, and
-    inactive. The active color group is used for painting widgets in
-    the active window. The disabled group is used for disabled
-    widgets. The inactive group is used for all other widgets. Most
-    palettes have identical active and inactive groups, while the
-    disabled group uses darker shades.
-
-    We initialize the QPalette object with a brown color. Qt
-    automatically derivates all color roles for all color groups from
-    that single color. We then override some of the default values. For
-    example, we use Qt::darkGreen instead of the default
-    (Qt::darkBlue) for the QPalette::Highlight role. The
-    QPalette::setBrush() overload that we use here sets the same
-    color or brush for all three color groups.
-
-    The \c setTexture() function is a private function that sets the
-    texture for a certain color role, while preserving the existing
-    color in the QBrush. A QBrush can hold both a solid color and a
-    texture at the same time. The solid color is used for drawing
-    text and other graphical elements where textures don't look good.
-
-    At the end, we set the brush for the disabled color group of the
-    palette. We use \c woodbackground.png as the texture for all
-    disabled widgets, including buttons, and use a darker color to
-    accompany the texture.
-
-    \image styles-disabledwood.png The Norwegian Wood style with disabled widgets
-
-    Let's move on to the other functions reimplemented from
-    QProxyStyle:
-
-    \snippet widgets/styles/norwegianwoodstyle.cpp 3
-    \snippet widgets/styles/norwegianwoodstyle.cpp 4
-
-    This QStyle::polish() overload is called once on every widget
-    drawn using the style. We reimplement it to set the Qt::WA_Hover
-    attribute on \l{QPushButton}s and \l{QComboBox}es. When this
-    attribute is set, Qt generates paint events when the mouse
-    pointer enters or leaves the widget. This makes it possible to
-    render push buttons and comboboxes differently when the mouse
-    pointer is over them.
-
-    \snippet widgets/styles/norwegianwoodstyle.cpp 5
-    \snippet widgets/styles/norwegianwoodstyle.cpp 6
-
-    This QStyle::unpolish() overload is called to undo any
-    modification done to the widget in \c polish(). For simplicity,
-    we assume that the flag wasn't set before \c polish() was called.
-    In an ideal world, we would remember the original state for each
-    widgets (e.g., using a QMap<QWidget *, bool>) and restore it in
-    \c unpolish().
-
-    \snippet widgets/styles/norwegianwoodstyle.cpp 7
-    \snippet widgets/styles/norwegianwoodstyle.cpp 8
-
-    The \l{QStyle::pixelMetric()}{pixelMetric()} function returns the
-    size in pixels for a certain user interface element. By
-    reimplementing this function, we can affect the way certain
-    widgets are drawn and their size hint. Here, we return 8 as the
-    width around a shown in a QComboBox, ensuring that there is
-    enough place around the text and the arrow for the Norwegian Wood
-    round corners. The default value for this setting in the Windows
-    style is 2.
-
-    We also change the extent of \l{QScrollBar}s, i.e., the height
-    for a horizontal scroll bar and the width for a vertical scroll
-    bar, to be 4 pixels more than in the Windows style. This makes the
-    style a bit more distinctive.
-
-    For all other QStyle::PixelMetric elements, we use the Windows
-    settings.
-
-    \snippet widgets/styles/norwegianwoodstyle.cpp 9
-    \snippet widgets/styles/norwegianwoodstyle.cpp 10
-
-    The \l{QStyle::styleHint()}{styleHint()} function returns some
-    hints to widgets or to the base style (in our case QProxyStyle)
-    about how to draw the widgets. The Windows style returns \c true
-    for the QStyle::SH_DitherDisabledText hint, resulting in a most
-    unpleasing visual effect. We override this behavior and return \c
-    false instead. We also return \c true for the
-    QStyle::SH_EtchDisabledText hint, meaning that disabled text is
-    rendered with an embossed look.
-
-    \snippet widgets/styles/norwegianwoodstyle.cpp 11
-    \snippet widgets/styles/norwegianwoodstyle.cpp 12
-
-    The \l{QStyle::drawPrimitive()}{drawPrimitive()} function is
-    called by Qt widgets to draw various fundamental graphical
-    elements. Here we reimplement it to draw QPushButton and
-    QComboBox with round corners. The button part of these widgets is
-    drawn using the QStyle::PE_PanelButtonCommand primitive element.
-
-    The \c option parameter, of type QStyleOption, contains
-    everything we need to know about the widget we want to draw on.
-    In particular, \c option->rect gives the rectangle within which
-    to draw the primitive element. The \c painter parameter is a
-    QPainter object that we can use to draw on the widget.
-
-    The \c widget parameter is the widget itself. Normally, all the
-    information we need is available in \c option and \c painter, so
-    we don't need \c widget. We can use it to perform special
-    effects; for example, QMacStyle uses it to animate default
-    buttons. If you use it, be aware that the caller is allowed to
-    pass a null pointer.
-
-    We start by defining three \l{QColor}s that we'll need later on.
-    We also put the x, y, width, and height components of the
-    widget's rectangle in local variables. The value used for the \c
-    semiTransparentWhite and for the \c semiTransparentBlack color's
-    alpha channel depends on whether the mouse cursor is over the
-    widget or not. Since we set the Qt::WA_Hover attribute on
-    \l{QPushButton}s and \l{QComboBox}es, we can rely on the
-    QStyle::State_MouseOver flag to be set when the mouse is over the
-    widget.
-
-    \snippet widgets/styles/norwegianwoodstyle.cpp 13
-    \snippet widgets/styles/norwegianwoodstyle.cpp 14
-
-    The \c roundRect variable is a QPainterPath. A QPainterPath is
-    a vectorial specification of a shape. Any shape (rectangle,
-    ellipse, spline, etc.) or combination of shapes can be expressed
-    as a path. We will use \c roundRect both for filling the button
-    background with a wooden texture and for drawing the outline. The
-    \c roundRectPath() function is a private function; we will come
-    back to it later.
-
-    \snippet widgets/styles/norwegianwoodstyle.cpp 15
-    \snippet widgets/styles/norwegianwoodstyle.cpp 16
-    \snippet widgets/styles/norwegianwoodstyle.cpp 17
-    \snippet widgets/styles/norwegianwoodstyle.cpp 18
-
-    We define two variables, \c brush and \c darker, and initialize
-    them based on the state of the button:
-
-    \list
-    \li If the button is a \l{QPushButton::flat}{flat button}, we use
-       the \l{QPalette::Window}{Window} brush. We set \c
-       darker to \c true if the button is
-       \l{QAbstractButton::down}{down} or
-       \l{QAbstractButton::checked}{checked}.
-    \li If the button is currently held down by the user or in the
-       \l{QAbstractButton::checked}{checked} state, we use the
-       \l{QPalette::Mid}{Mid} component of the palette. We set
-       \c darker to \c true if the button is
-       \l{QAbstractButton::checked}{checked}.
-    \li Otherwise, we use the \l{QPalette::Button}{Button} component
-       of the palette.
-    \endlist
-
-    The screenshot below illustrates how \l{QPushButton}s are
-    rendered based on their state:
-
-    \image styles-woodbuttons.png Norwegian Wood buttons in different states
-
-    To discover whether the button is flat or not, we need to cast
-    the \c option parameter to QStyleOptionButton and check if the
-    \l{QStyleOptionButton::features}{features} member specifies the
-    QStyleOptionButton::Flat flag. The qstyleoption_cast() function
-    performs a dynamic cast; if \c option is not a
-    QStyleOptionButton, qstyleoption_cast() returns a null pointer.
-
-    \snippet widgets/styles/norwegianwoodstyle.cpp 19
-    \snippet widgets/styles/norwegianwoodstyle.cpp 20
-    \snippet widgets/styles/norwegianwoodstyle.cpp 21
-    \snippet widgets/styles/norwegianwoodstyle.cpp 22
-    \snippet widgets/styles/norwegianwoodstyle.cpp 23
-
-    We turn on antialiasing on QPainter. Antialiasing is a technique
-    that reduces the visual distortion that occurs when the edges of
-    a shape are converted into pixels. For the Norwegian Wood style,
-    we use it to obtain smoother edges for the round buttons.
-
-    \image styles-aliasing.png Norwegian wood buttons with and without antialiasing
-
-    The first call to QPainter::fillPath() draws the background of
-    the button with a wooden texture. The second call to
-    \l{QPainter::fillPath()}{fillPath()} paints the same area with a
-    semi-transparent black color (a black color with an alpha channel
-    of 63) to make the area darker if \c darker is true.
-
-    \snippet widgets/styles/norwegianwoodstyle.cpp 24
-    \snippet widgets/styles/norwegianwoodstyle.cpp 25
-
-    Next, we draw the outline. The top-left half of the outline and
-    the bottom-right half of the outline are drawn using different
-    \l{QPen}s to produce a 3D effect. Normally, the top-left half of
-    the outline is drawn lighter whereas the bottom-right half is
-    drawn darker, but if the button is
-    \l{QAbstractButton::down}{down} or
-    \l{QAbstractButton::checked}{checked}, we invert the two
-    \l{QPen}s to give a sunken look to the button.
-
-    \snippet widgets/styles/norwegianwoodstyle.cpp 26
-
-    We draw the top-left part of the outline by calling
-    QPainter::drawPath() with an appropriate
-    \l{QPainter::setClipRegion()}{clip region}. If the
-    \l{QStyleOption::direction}{layout direction} is right-to-left
-    instead of left-to-right, we swap the \c x1, \c x2, \c x3, and \c
-    x4 variables to obtain correct results. On right-to-left desktop,
-    the "light" comes from the top-right corner of the screen instead
-    of the top-left corner; raised and sunken widgets must be drawn
-    accordingly.
-
-    The diagram below illustrates how 3D effects are drawn according
-    to the layout direction. The area in red on the diagram
-    corresponds to the \c topHalf polygon:
-
-    \image styles-3d.png
-
-    An easy way to test how a style looks in right-to-left mode is to
-    pass the \c -reverse command-line option to the application. This
-    option is recognized by the QApplication constructor.
-
-    \snippet widgets/styles/norwegianwoodstyle.cpp 32
-    \snippet widgets/styles/norwegianwoodstyle.cpp 33
-    \snippet widgets/styles/norwegianwoodstyle.cpp 34
-
-    The bottom-right part of the outline is drawn in a similar
-    fashion. Then we draw a one-pixel wide outline around the entire
-    button, using the \l{QPalette::WindowText}{WindowText} component
-    of the QPalette.
-
-    This completes the QStyle::PE_PanelButtonCommand case of the \c
-    switch statement. Other primitive elements are handled by the
-    base style. Let's now turn to the other \c NorwegianWoodStyle
-    member functions:
-
-    \snippet widgets/styles/norwegianwoodstyle.cpp 35
-    \snippet widgets/styles/norwegianwoodstyle.cpp 36
-
-    We reimplement QStyle::drawControl() to draw the text on a
-    QPushButton in a bright color when the button is
-    \l{QAbstractButton::down}{down} or
-    \l{QAbstractButton::checked}{checked}.
-
-    If the \c option parameter points to a QStyleOptionButton object
-    (it normally should), we take a copy of the object and modify its
-    \l{QStyleOption::palette}{palette} member to make the
-    QPalette::ButtonText be the same as the QPalette::BrightText
-    component (unless the widget is disabled).
-
-    \snippet widgets/styles/norwegianwoodstyle.cpp 37
-    \snippet widgets/styles/norwegianwoodstyle.cpp 38
-
-    The \c setTexture() function is a private function that sets the
-    \l{QBrush::texture()}{texture} component of the \l{QBrush}es for
-    a certain \l{QPalette::ColorRole}{color role}, for all three
-    \l{QPalette::ColorGroup}{color groups} (active, disabled,
-    inactive). We used it to initialize the Norwegian Wood palette in
-    \c standardPalette.
-
-    \snippet widgets/styles/norwegianwoodstyle.cpp 39
-    \snippet widgets/styles/norwegianwoodstyle.cpp 40
-
-    The \c roundRectPath() function is a private function that
-    constructs a QPainterPath object for round buttons. The path
-    consists of eight segments: four arc segments for the corners and
-    four lines for the sides.
-
-    With around 250 lines of code, we have a fully functional custom
-    style based on one of the predefined styles. Custom styles can be
-    used to provide a distinct look to an application or family of
-    applications.
-
-    \section1 WidgetGallery Class
-
-    For completeness, we will quickly review the \c WidgetGallery
-    class, which contains the most common Qt widgets and allows the
-    user to change style dynamically. Here's the class definition:
-
-    \snippet widgets/styles/widgetgallery.h 0
-    \dots
-    \snippet widgets/styles/widgetgallery.h 1
-
-    Here's the \c WidgetGallery constructor:
-
-    \snippet widgets/styles/widgetgallery.cpp 0
-
-    We start by creating child widgets. The \uicontrol Style combobox is
-    initialized with all the styles known to QStyleFactory, in
-    addition to \c NorwegianWood. The \c create...() functions are
-    private functions that set up the various parts of the \c
-    WidgetGallery.
-
-    \snippet widgets/styles/widgetgallery.cpp 1
-    \snippet widgets/styles/widgetgallery.cpp 2
-
-    We connect the \uicontrol Style combobox to the \c changeStyle()
-    private slot, the \uicontrol{Use style's standard palette} check box to
-    the \c changePalette() slot, and the \uicontrol{Disable widgets} check
-    box to the child widgets'
-    \l{QWidget::setDisabled()}{setDisabled()} slot.
-
-    \snippet widgets/styles/widgetgallery.cpp 3
-    \snippet widgets/styles/widgetgallery.cpp 4
-
-    Finally, we put the child widgets in layouts.
-
-    \snippet widgets/styles/widgetgallery.cpp 5
-    \snippet widgets/styles/widgetgallery.cpp 6
-
-    When the user changes the style in the combobox, we call
-    QApplication::setStyle() to dynamically change the style of the
-    application.
-
-    \snippet widgets/styles/widgetgallery.cpp 7
-    \snippet widgets/styles/widgetgallery.cpp 8
-
-    If the user turns the \uicontrol{Use style's standard palette} on, the
-    current style's \l{QStyle::standardPalette()}{standard palette}
-    is used; otherwise, the system's default palette is honored.
-
-    \snippet widgets/styles/widgetgallery.cpp 9
-    \snippet widgets/styles/widgetgallery.cpp 10
-
-    The \c advanceProgressBar() slot is called at regular intervals
-    to advance the progress bar. Since we don't know how long the
-    user will keep the Styles application running, we use a
-    logarithmic formula: The closer the progress bar gets to 100%,
-    the slower it advances.
-
-    We will review \c createProgressBar() in a moment.
-
-    \snippet widgets/styles/widgetgallery.cpp 11
-    \snippet widgets/styles/widgetgallery.cpp 12
-
-    The \c createTopLeftGroupBox() function creates the QGroupBox
-    that occupies the top-left corner of the \c WidgetGallery. We
-    skip the \c createTopRightGroupBox(), \c
-    createBottomLeftTabWidget(), and \c createBottomRightGroupBox()
-    functions, which are very similar.
-
-    \snippet widgets/styles/widgetgallery.cpp 13
-
-    In \c createProgressBar(), we create a QProgressBar at the bottom
-    of the \c WidgetGallery and connect its
-    \l{QTimer::timeout()}{timeout()} signal to the \c
-    advanceProgressBar() slot.
-*/
diff --git a/examples/widgets/widgets/CMakeLists.txt b/examples/widgets/widgets/CMakeLists.txt
index 43d03bdea2..d548c63ff8 100644
--- a/examples/widgets/widgets/CMakeLists.txt
+++ b/examples/widgets/widgets/CMakeLists.txt
@@ -11,7 +11,6 @@ qt_internal_add_example(shapedclock)
 qt_internal_add_example(shortcuteditor)
 qt_internal_add_example(sliders)
 qt_internal_add_example(spinboxes)
-qt_internal_add_example(styles)
 qt_internal_add_example(tablet)
 qt_internal_add_example(tetrix)
 qt_internal_add_example(tooltips)
diff --git a/examples/widgets/widgets/styles/CMakeLists.txt b/examples/widgets/widgets/styles/CMakeLists.txt
deleted file mode 100644
index 9632f01a89..0000000000
--- a/examples/widgets/widgets/styles/CMakeLists.txt
+++ /dev/null
@@ -1,51 +0,0 @@
-# Copyright (C) 2022 The Qt Company Ltd.
-# SPDX-License-Identifier: BSD-3-Clause
-
-cmake_minimum_required(VERSION 3.16)
-project(styles LANGUAGES CXX)
-
-if(NOT DEFINED INSTALL_EXAMPLESDIR)
-    set(INSTALL_EXAMPLESDIR "examples")
-endif()
-
-set(INSTALL_EXAMPLEDIR "${INSTALL_EXAMPLESDIR}/widgets/widgets/styles")
-
-find_package(Qt6 REQUIRED COMPONENTS Core Gui Widgets)
-
-qt_standard_project_setup()
-
-qt_add_executable(styles
-    main.cpp
-    norwegianwoodstyle.cpp norwegianwoodstyle.h
-    widgetgallery.cpp widgetgallery.h
-)
-
-set_target_properties(styles PROPERTIES
-    WIN32_EXECUTABLE TRUE
-    MACOSX_BUNDLE TRUE
-)
-
-target_link_libraries(styles PRIVATE
-    Qt6::Core
-    Qt6::Gui
-    Qt6::Widgets
-)
-
-# Resources:
-set(styles_resource_files
-    "images/woodbackground.png"
-    "images/woodbutton.png"
-)
-
-qt_add_resources(styles "styles"
-    PREFIX
-        "/"
-    FILES
-        ${styles_resource_files}
-)
-
-install(TARGETS styles
-    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
-    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
-    LIBRARY DESTINATION "${INSTALL_EXAMPLEDIR}"
-)
diff --git a/examples/widgets/widgets/styles/images/woodbackground.png b/examples/widgets/widgets/styles/images/woodbackground.png
deleted file mode 100644
index 8be3366bb4..0000000000
--- a/examples/widgets/widgets/styles/images/woodbackground.png
+++ /dev/null
diff --git a/examples/widgets/widgets/styles/images/woodbutton.png b/examples/widgets/widgets/styles/images/woodbutton.png
deleted file mode 100644
index adb59ef633..0000000000
--- a/examples/widgets/widgets/styles/images/woodbutton.png
+++ /dev/null
diff --git a/examples/widgets/widgets/styles/main.cpp b/examples/widgets/widgets/styles/main.cpp
deleted file mode 100644
index 5c33895ea4..0000000000
--- a/examples/widgets/widgets/styles/main.cpp
+++ /dev/null
@@ -1,17 +0,0 @@
-// Copyright (C) 2016 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
-
-#include <QApplication>
-
-#include "norwegianwoodstyle.h"
-#include "widgetgallery.h"
-
-int main(int argc, char *argv[])
-{
-    QApplication::setStyle(new NorwegianWoodStyle);
-
-    QApplication app(argc, argv);
-    WidgetGallery gallery;
-    gallery.show();
-    return app.exec();
-}
diff --git a/examples/widgets/widgets/styles/norwegianwoodstyle.cpp b/examples/widgets/widgets/styles/norwegianwoodstyle.cpp
deleted file mode 100644
index a8969dfd54..0000000000
--- a/examples/widgets/widgets/styles/norwegianwoodstyle.cpp
+++ /dev/null
@@ -1,310 +0,0 @@
-// Copyright (C) 2016 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
-
-#include "norwegianwoodstyle.h"
-
-#include <QComboBox>
-#include <QPainter>
-#include <QPainterPath>
-#include <QPushButton>
-#include <QStyleFactory>
-
-NorwegianWoodStyle::NorwegianWoodStyle() :
-    QProxyStyle(QStyleFactory::create("windows"))
-{
-    setObjectName("NorwegianWood");
-}
-
-//! [0]
-QPalette NorwegianWoodStyle::standardPalette() const
-{
-    if (!m_standardPalette.isBrushSet(QPalette::Disabled, QPalette::Mid)) {
-        QColor brown(212, 140, 95);
-        QColor beige(236, 182, 120);
-        QColor slightlyOpaqueBlack(0, 0, 0, 63);
-
-        QImage backgroundImage(":/images/woodbackground.png");
-        QImage buttonImage(":/images/woodbutton.png");
-        QImage midImage = buttonImage.convertToFormat(QImage::Format_RGB32);
-
-        QPainter painter;
-        painter.begin(&midImage);
-        painter.setPen(Qt::NoPen);
-        painter.fillRect(midImage.rect(), slightlyOpaqueBlack);
-        painter.end();
-    //! [0]
-
-    //! [1]
-        QPalette palette(brown);
-
-        palette.setBrush(QPalette::BrightText, Qt::white);
-        palette.setBrush(QPalette::Base, beige);
-        palette.setBrush(QPalette::Highlight, Qt::darkGreen);
-        setTexture(palette, QPalette::Button, buttonImage);
-        setTexture(palette, QPalette::Mid, midImage);
-        setTexture(palette, QPalette::Window, backgroundImage);
-
-        QBrush brush = palette.window();
-        brush.setColor(brush.color().darker());
-
-        palette.setBrush(QPalette::Disabled, QPalette::WindowText, brush);
-        palette.setBrush(QPalette::Disabled, QPalette::Text, brush);
-        palette.setBrush(QPalette::Disabled, QPalette::ButtonText, brush);
-        palette.setBrush(QPalette::Disabled, QPalette::Base, brush);
-        palette.setBrush(QPalette::Disabled, QPalette::Button, brush);
-        palette.setBrush(QPalette::Disabled, QPalette::Mid, brush);
-
-        m_standardPalette = palette;
-    }
-
-    return m_standardPalette;
-}
-//! [1]
-
-//! [3]
-void NorwegianWoodStyle::polish(QWidget *widget)
-//! [3] //! [4]
-{
-    if (qobject_cast<QPushButton *>(widget)
-            || qobject_cast<QComboBox *>(widget))
-        widget->setAttribute(Qt::WA_Hover, true);
-}
-//! [4]
-
-//! [5]
-void NorwegianWoodStyle::unpolish(QWidget *widget)
-//! [5] //! [6]
-{
-    if (qobject_cast<QPushButton *>(widget)
-            || qobject_cast<QComboBox *>(widget))
-        widget->setAttribute(Qt::WA_Hover, false);
-}
-//! [6]
-
-//! [7]
-int NorwegianWoodStyle::pixelMetric(PixelMetric metric,
-//! [7] //! [8]
-                                    const QStyleOption *option,
-                                    const QWidget *widget) const
-{
-    switch (metric) {
-    case PM_ComboBoxFrameWidth:
-        return 8;
-    case PM_ScrollBarExtent:
-        return QProxyStyle::pixelMetric(metric, option, widget) + 4;
-    default:
-        return QProxyStyle::pixelMetric(metric, option, widget);
-    }
-}
-//! [8]
-
-//! [9]
-int NorwegianWoodStyle::styleHint(StyleHint hint, const QStyleOption *option,
-//! [9] //! [10]
-                                  const QWidget *widget,
-                                  QStyleHintReturn *returnData) const
-{
-    switch (hint) {
-    case SH_DitherDisabledText:
-        return int(false);
-    case SH_EtchDisabledText:
-        return int(true);
-    default:
-        return QProxyStyle::styleHint(hint, option, widget, returnData);
-    }
-}
-//! [10]
-
-//! [11]
-void NorwegianWoodStyle::drawPrimitive(PrimitiveElement element,
-//! [11] //! [12]
-                                       const QStyleOption *option,
-                                       QPainter *painter,
-                                       const QWidget *widget) const
-{
-    switch (element) {
-    case PE_PanelButtonCommand:
-        {
-            int delta = (option->state & State_MouseOver) ? 64 : 0;
-            QColor slightlyOpaqueBlack(0, 0, 0, 63);
-            QColor semiTransparentWhite(255, 255, 255, 127 + delta);
-            QColor semiTransparentBlack(0, 0, 0, 127 - delta);
-
-            int x, y, width, height;
-            option->rect.getRect(&x, &y, &width, &height);
-//! [12]
-
-//! [13]
-            QPainterPath roundRect = roundRectPath(option->rect);
-//! [13] //! [14]
-            int radius = qMin(width, height) / 2;
-//! [14]
-
-//! [15]
-            QBrush brush;
-//! [15] //! [16]
-            bool darker;
-
-            const QStyleOptionButton *buttonOption =
-                    qstyleoption_cast<const QStyleOptionButton *>(option);
-            if (buttonOption
-                    && (buttonOption->features & QStyleOptionButton::Flat)) {
-                brush = option->palette.window();
-                darker = (option->state & (State_Sunken | State_On));
-            } else {
-                if (option->state & (State_Sunken | State_On)) {
-                    brush = option->palette.mid();
-                    darker = !(option->state & State_Sunken);
-                } else {
-                    brush = option->palette.button();
-                    darker = false;
-//! [16] //! [17]
-                }
-//! [17] //! [18]
-            }
-//! [18]
-
-//! [19]
-            painter->save();
-//! [19] //! [20]
-            painter->setRenderHint(QPainter::Antialiasing, true);
-//! [20] //! [21]
-            painter->fillPath(roundRect, brush);
-//! [21] //! [22]
-            if (darker)
-//! [22] //! [23]
-                painter->fillPath(roundRect, slightlyOpaqueBlack);
-//! [23]
-
-//! [24]
-            int penWidth;
-//! [24] //! [25]
-            if (radius < 10)
-                penWidth = 3;
-            else if (radius < 20)
-                penWidth = 5;
-            else
-                penWidth = 7;
-
-            QPen topPen(semiTransparentWhite, penWidth);
-            QPen bottomPen(semiTransparentBlack, penWidth);
-
-            if (option->state & (State_Sunken | State_On))
-                qSwap(topPen, bottomPen);
-//! [25]
-
-//! [26]
-            int x1 = x;
-            int x2 = x + radius;
-            int x3 = x + width - radius;
-            int x4 = x + width;
-
-            if (option->direction == Qt::RightToLeft) {
-                qSwap(x1, x4);
-                qSwap(x2, x3);
-            }
-
-            QPolygon topHalf;
-            topHalf << QPoint(x1, y)
-                    << QPoint(x4, y)
-                    << QPoint(x3, y + radius)
-                    << QPoint(x2, y + height - radius)
-                    << QPoint(x1, y + height);
-
-            painter->setClipPath(roundRect);
-            painter->setClipRegion(topHalf, Qt::IntersectClip);
-            painter->setPen(topPen);
-            painter->drawPath(roundRect);
-//! [26] //! [32]
-
-            QPolygon bottomHalf = topHalf;
-            bottomHalf[0] = QPoint(x4, y + height);
-
-            painter->setClipPath(roundRect);
-            painter->setClipRegion(bottomHalf, Qt::IntersectClip);
-            painter->setPen(bottomPen);
-            painter->drawPath(roundRect);
-
-            painter->setPen(option->palette.windowText().color());
-            painter->setClipping(false);
-            painter->drawPath(roundRect);
-
-            painter->restore();
-        }
-        break;
-//! [32] //! [33]
-    default:
-//! [33] //! [34]
-        QProxyStyle::drawPrimitive(element, option, painter, widget);
-    }
-}
-//! [34]
-
-//! [35]
-void NorwegianWoodStyle::drawControl(ControlElement element,
-//! [35] //! [36]
-                                     const QStyleOption *option,
-                                     QPainter *painter,
-                                     const QWidget *widget) const
-{
-    switch (element) {
-    case CE_PushButtonLabel:
-        {
-            QStyleOptionButton myButtonOption;
-            const QStyleOptionButton *buttonOption =
-                    qstyleoption_cast<const QStyleOptionButton *>(option);
-            if (buttonOption) {
-                myButtonOption = *buttonOption;
-                if (myButtonOption.palette.currentColorGroup()
-                        != QPalette::Disabled) {
-                    if (myButtonOption.state & (State_Sunken | State_On)) {
-                        myButtonOption.palette.setBrush(QPalette::ButtonText,
-                                myButtonOption.palette.brightText());
-                    }
-                }
-            }
-            QProxyStyle::drawControl(element, &myButtonOption, painter, widget);
-        }
-        break;
-    default:
-        QProxyStyle::drawControl(element, option, painter, widget);
-    }
-}
-//! [36]
-
-//! [37]
-void NorwegianWoodStyle::setTexture(QPalette &palette, QPalette::ColorRole role,
-//! [37] //! [38]
-                                    const QImage &image)
-{
-    for (int i = 0; i < QPalette::NColorGroups; ++i) {
-        QBrush brush(image);
-        brush.setColor(palette.brush(QPalette::ColorGroup(i), role).color());
-        palette.setBrush(QPalette::ColorGroup(i), role, brush);
-    }
-}
-//! [38]
-
-//! [39]
-QPainterPath NorwegianWoodStyle::roundRectPath(const QRect &rect)
-//! [39] //! [40]
-{
-    int radius = qMin(rect.width(), rect.height()) / 2;
-    int diam = 2 * radius;
-
-    int x1, y1, x2, y2;
-    rect.getCoords(&x1, &y1, &x2, &y2);
-
-    QPainterPath path;
-    path.moveTo(x2, y1 + radius);
-    path.arcTo(QRect(x2 - diam, y1, diam, diam), 0.0, +90.0);
-    path.lineTo(x1 + radius, y1);
-    path.arcTo(QRect(x1, y1, diam, diam), 90.0, +90.0);
-    path.lineTo(x1, y2 - radius);
-    path.arcTo(QRect(x1, y2 - diam, diam, diam), 180.0, +90.0);
-    path.lineTo(x1 + radius, y2);
-    path.arcTo(QRect(x2 - diam, y2 - diam, diam, diam), 270.0, +90.0);
-    path.closeSubpath();
-    return path;
-}
-//! [40]
diff --git a/examples/widgets/widgets/styles/norwegianwoodstyle.h b/examples/widgets/widgets/styles/norwegianwoodstyle.h
deleted file mode 100644
index 5af2171f35..0000000000
--- a/examples/widgets/widgets/styles/norwegianwoodstyle.h
+++ /dev/null
@@ -1,43 +0,0 @@
-// Copyright (C) 2016 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
-
-#ifndef NORWEGIANWOODSTYLE_H
-#define NORWEGIANWOODSTYLE_H
-
-#include <QProxyStyle>
-#include <QPalette>
-
-QT_BEGIN_NAMESPACE
-class QPainterPath;
-QT_END_NAMESPACE
-
-//! [0]
-class NorwegianWoodStyle : public QProxyStyle
-{
-    Q_OBJECT
-
-public:
-    NorwegianWoodStyle();
-
-    QPalette standardPalette() const override;
-
-    void polish(QWidget *widget) override;
-    void unpolish(QWidget *widget) override;
-    int pixelMetric(PixelMetric metric, const QStyleOption *option,
-                    const QWidget *widget) const override;
-    int styleHint(StyleHint hint, const QStyleOption *option,
-                  const QWidget *widget, QStyleHintReturn *returnData) const override;
-    void drawPrimitive(PrimitiveElement element, const QStyleOption *option,
-                       QPainter *painter, const QWidget *widget) const override;
-    void drawControl(ControlElement control, const QStyleOption *option,
-                     QPainter *painter, const QWidget *widget) const override;
-
-private:
-    static void setTexture(QPalette &palette, QPalette::ColorRole role,
-                           const QImage &image);
-    static QPainterPath roundRectPath(const QRect &rect);
-    mutable QPalette m_standardPalette;
-};
-//! [0]
-
-#endif
diff --git a/examples/widgets/widgets/styles/styles.pro b/examples/widgets/widgets/styles/styles.pro
deleted file mode 100644
index 87dee7e04c..0000000000
--- a/examples/widgets/widgets/styles/styles.pro
+++ /dev/null
@@ -1,13 +0,0 @@
-QT += widgets
-requires(qtConfig(combobox))
-
-HEADERS       = norwegianwoodstyle.h \
-                widgetgallery.h
-SOURCES       = main.cpp \
-                norwegianwoodstyle.cpp \
-                widgetgallery.cpp
-RESOURCES     = styles.qrc
-
-# install
-target.path = $$[QT_INSTALL_EXAMPLES]/widgets/widgets/styles
-INSTALLS += target
diff --git a/examples/widgets/widgets/styles/styles.qrc b/examples/widgets/widgets/styles/styles.qrc
deleted file mode 100644
index 4fdad8d914..0000000000
--- a/examples/widgets/widgets/styles/styles.qrc
+++ /dev/null
@@ -1,6 +0,0 @@
-<!DOCTYPE RCC><RCC version="1.0">
-<qresource>
-    <file>images/woodbutton.png</file>
-    <file>images/woodbackground.png</file>
-</qresource>
-</RCC>
diff --git a/examples/widgets/widgets/styles/widgetgallery.cpp b/examples/widgets/widgets/styles/widgetgallery.cpp
deleted file mode 100644
index 83cb99a52c..0000000000
--- a/examples/widgets/widgets/styles/widgetgallery.cpp
+++ /dev/null
@@ -1,277 +0,0 @@
-// Copyright (C) 2016 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
-
-#include "widgetgallery.h"
-#include "norwegianwoodstyle.h"
-
-#include <QApplication>
-#include <QCheckBox>
-#include <QComboBox>
-#include <QDateTimeEdit>
-#include <QDial>
-#include <QGridLayout>
-#include <QGroupBox>
-#include <QLabel>
-#include <QLineEdit>
-#include <QProgressBar>
-#include <QPushButton>
-#include <QRadioButton>
-#include <QScrollBar>
-#include <QSpinBox>
-#include <QStyle>
-#include <QStyleFactory>
-#include <QTableWidget>
-#include <QTextEdit>
-#include <QTimer>
-
-//! [0]
-WidgetGallery::WidgetGallery(QWidget *parent)
-    : QDialog(parent)
-{
-    styleComboBox = new QComboBox;
-    const QString defaultStyleName = QApplication::style()->objectName();
-    QStringList styleNames = QStyleFactory::keys();
-    styleNames.append("NorwegianWood");
-    for (int i = 1, size = styleNames.size(); i < size; ++i) {
-        if (defaultStyleName.compare(styleNames.at(i), Qt::CaseInsensitive) == 0) {
-            styleNames.swapItemsAt(0, i);
-            break;
-        }
-    }
-    styleComboBox->addItems(styleNames);
-
-    styleLabel = new QLabel(tr("&Style:"));
-    styleLabel->setBuddy(styleComboBox);
-
-    useStylePaletteCheckBox = new QCheckBox(tr("&Use style's standard palette"));
-    useStylePaletteCheckBox->setChecked(true);
-
-    disableWidgetsCheckBox = new QCheckBox(tr("&Disable widgets"));
-
-    createTopLeftGroupBox();
-    createTopRightGroupBox();
-    createBottomLeftTabWidget();
-    createBottomRightGroupBox();
-    createProgressBar();
-//! [0]
-
-//! [1]
-    connect(styleComboBox, &QComboBox::textActivated,
-//! [1] //! [2]
-            this, &WidgetGallery::changeStyle);
-    connect(useStylePaletteCheckBox, &QCheckBox::toggled,
-            this, &WidgetGallery::changePalette);
-    connect(disableWidgetsCheckBox, &QCheckBox::toggled,
-            topLeftGroupBox, &QGroupBox::setDisabled);
-    connect(disableWidgetsCheckBox, &QCheckBox::toggled,
-            topRightGroupBox, &QGroupBox::setDisabled);
-    connect(disableWidgetsCheckBox, &QCheckBox::toggled,
-            bottomLeftTabWidget, &QGroupBox::setDisabled);
-    connect(disableWidgetsCheckBox, &QCheckBox::toggled,
-            bottomRightGroupBox, &QGroupBox::setDisabled);
-//! [2]
-
-//! [3]
-    QHBoxLayout *topLayout = new QHBoxLayout;
-//! [3] //! [4]
-    topLayout->addWidget(styleLabel);
-    topLayout->addWidget(styleComboBox);
-    topLayout->addStretch(1);
-    topLayout->addWidget(useStylePaletteCheckBox);
-    topLayout->addWidget(disableWidgetsCheckBox);
-
-    QGridLayout *mainLayout = new QGridLayout;
-    mainLayout->addLayout(topLayout, 0, 0, 1, 2);
-    mainLayout->addWidget(topLeftGroupBox, 1, 0);
-    mainLayout->addWidget(topRightGroupBox, 1, 1);
-    mainLayout->addWidget(bottomLeftTabWidget, 2, 0);
-    mainLayout->addWidget(bottomRightGroupBox, 2, 1);
-    mainLayout->addWidget(progressBar, 3, 0, 1, 2);
-    mainLayout->setRowStretch(1, 1);
-    mainLayout->setRowStretch(2, 1);
-    mainLayout->setColumnStretch(0, 1);
-    mainLayout->setColumnStretch(1, 1);
-    setLayout(mainLayout);
-
-    setWindowTitle(tr("Styles"));
-    styleChanged();
-}
-//! [4]
-
-//! [5]
-void WidgetGallery::changeStyle(const QString &styleName)
-//! [5] //! [6]
-{
-    if (styleName == "NorwegianWood")
-        QApplication::setStyle(new NorwegianWoodStyle);
-    else
-        QApplication::setStyle(QStyleFactory::create(styleName));
-}
-//! [6]
-
-//! [7]
-void WidgetGallery::changePalette()
-//! [7] //! [8]
-{
-    QApplication::setPalette(useStylePaletteCheckBox->isChecked() ?
-        QApplication::style()->standardPalette() : QPalette());
-}
-//! [8]
-
-void WidgetGallery::changeEvent(QEvent *event)
-{
-    if (event->type() == QEvent::StyleChange)
-        styleChanged();
-}
-
-void WidgetGallery::styleChanged()
-{
-    auto styleName = QApplication::style()->objectName();
-    for (int i = 0; i < styleComboBox->count(); ++i) {
-        if (QString::compare(styleComboBox->itemText(i), styleName, Qt::CaseInsensitive) == 0) {
-            styleComboBox->setCurrentIndex(i);
-            break;
-        }
-    }
-
-    changePalette();
-}
-
-//! [9]
-void WidgetGallery::advanceProgressBar()
-//! [9] //! [10]
-{
-    int curVal = progressBar->value();
-    int maxVal = progressBar->maximum();
-    progressBar->setValue(curVal + (maxVal - curVal) / 100);
-}
-//! [10]
-
-//! [11]
-void WidgetGallery::createTopLeftGroupBox()
-//! [11] //! [12]
-{
-    topLeftGroupBox = new QGroupBox(tr("Group 1"));
-
-    radioButton1 = new QRadioButton(tr("Radio button 1"));
-    radioButton2 = new QRadioButton(tr("Radio button 2"));
-    radioButton3 = new QRadioButton(tr("Radio button 3"));
-    radioButton1->setChecked(true);
-
-    checkBox = new QCheckBox(tr("Tri-state check box"));
-    checkBox->setTristate(true);
-    checkBox->setCheckState(Qt::PartiallyChecked);
-
-    QVBoxLayout *layout = new QVBoxLayout;
-    layout->addWidget(radioButton1);
-    layout->addWidget(radioButton2);
-    layout->addWidget(radioButton3);
-    layout->addWidget(checkBox);
-    layout->addStretch(1);
-    topLeftGroupBox->setLayout(layout);
-}
-//! [12]
-
-void WidgetGallery::createTopRightGroupBox()
-{
-    topRightGroupBox = new QGroupBox(tr("Group 2"));
-
-    defaultPushButton = new QPushButton(tr("Default Push Button"));
-    defaultPushButton->setDefault(true);
-
-    togglePushButton = new QPushButton(tr("Toggle Push Button"));
-    togglePushButton->setCheckable(true);
-    togglePushButton->setChecked(true);
-
-    flatPushButton = new QPushButton(tr("Flat Push Button"));
-    flatPushButton->setFlat(true);
-
-    QVBoxLayout *layout = new QVBoxLayout;
-    layout->addWidget(defaultPushButton);
-    layout->addWidget(togglePushButton);
-    layout->addWidget(flatPushButton);
-    layout->addStretch(1);
-    topRightGroupBox->setLayout(layout);
-}
-
-void WidgetGallery::createBottomLeftTabWidget()
-{
-    bottomLeftTabWidget = new QTabWidget;
-    bottomLeftTabWidget->setSizePolicy(QSizePolicy::Preferred,
-                                       QSizePolicy::Ignored);
-
-    QWidget *tab1 = new QWidget;
-    tableWidget = new QTableWidget(10, 10);
-
-    QHBoxLayout *tab1hbox = new QHBoxLayout;
-    tab1hbox->setContentsMargins(5,5, 5, 5);
-    tab1hbox->addWidget(tableWidget);
-    tab1->setLayout(tab1hbox);
-
-    QWidget *tab2 = new QWidget;
-    textEdit = new QTextEdit;
-
-    textEdit->setPlainText(tr("Twinkle, twinkle, little star,\n"
-                              "How I wonder what you are.\n"
-                              "Up above the world so high,\n"
-                              "Like a diamond in the sky.\n"
-                              "Twinkle, twinkle, little star,\n"
-                              "How I wonder what you are!\n"));
-
-    QHBoxLayout *tab2hbox = new QHBoxLayout;
-    tab2hbox->setContentsMargins(5, 5, 5, 5);
-    tab2hbox->addWidget(textEdit);
-    tab2->setLayout(tab2hbox);
-
-    bottomLeftTabWidget->addTab(tab1, tr("&Table"));
-    bottomLeftTabWidget->addTab(tab2, tr("Text &Edit"));
-}
-
-void WidgetGallery::createBottomRightGroupBox()
-{
-    bottomRightGroupBox = new QGroupBox(tr("Group 3"));
-    bottomRightGroupBox->setCheckable(true);
-    bottomRightGroupBox->setChecked(true);
-
-    lineEdit = new QLineEdit("s3cRe7");
-    lineEdit->setEchoMode(QLineEdit::Password);
-
-    spinBox = new QSpinBox(bottomRightGroupBox);
-    spinBox->setValue(50);
-
-    dateTimeEdit = new QDateTimeEdit(bottomRightGroupBox);
-    dateTimeEdit->setDateTime(QDateTime::currentDateTime());
-
-    slider = new QSlider(Qt::Horizontal, bottomRightGroupBox);
-    slider->setValue(40);
-
-    scrollBar = new QScrollBar(Qt::Horizontal, bottomRightGroupBox);
-    scrollBar->setValue(60);
-
-    dial = new QDial(bottomRightGroupBox);
-    dial->setValue(30);
-    dial->setNotchesVisible(true);
-
-    QGridLayout *layout = new QGridLayout;
-    layout->addWidget(lineEdit, 0, 0, 1, 2);
-    layout->addWidget(spinBox, 1, 0, 1, 2);
-    layout->addWidget(dateTimeEdit, 2, 0, 1, 2);
-    layout->addWidget(slider, 3, 0);
-    layout->addWidget(scrollBar, 4, 0);
-    layout->addWidget(dial, 3, 1, 2, 1);
-    layout->setRowStretch(5, 1);
-    bottomRightGroupBox->setLayout(layout);
-}
-
-//! [13]
-void WidgetGallery::createProgressBar()
-{
-    progressBar = new QProgressBar;
-    progressBar->setRange(0, 10000);
-    progressBar->setValue(0);
-
-    QTimer *timer = new QTimer(this);
-    connect(timer, &QTimer::timeout, this, &WidgetGallery::advanceProgressBar);
-    timer->start(1000);
-}
-//! [13]
diff --git a/examples/widgets/widgets/styles/widgetgallery.h b/examples/widgets/widgets/styles/widgetgallery.h
deleted file mode 100644
index f4c43e7b4f..0000000000
--- a/examples/widgets/widgets/styles/widgetgallery.h
+++ /dev/null
@@ -1,86 +0,0 @@
-// Copyright (C) 2016 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
-
-#ifndef WIDGETGALLERY_H
-#define WIDGETGALLERY_H
-
-#include <QDialog>
-
-QT_BEGIN_NAMESPACE
-class QCheckBox;
-class QComboBox;
-class QDateTimeEdit;
-class QDial;
-class QGroupBox;
-class QLabel;
-class QLineEdit;
-class QProgressBar;
-class QPushButton;
-class QRadioButton;
-class QScrollBar;
-class QSlider;
-class QSpinBox;
-class QTabWidget;
-class QTableWidget;
-class QTextEdit;
-QT_END_NAMESPACE
-
-//! [0]
-class WidgetGallery : public QDialog
-{
-    Q_OBJECT
-
-public:
-    WidgetGallery(QWidget *parent = nullptr);
-
-protected:
-    void changeEvent(QEvent *) override;
-
-private slots:
-    void changeStyle(const QString &styleName);
-    void styleChanged();
-    void changePalette();
-    void advanceProgressBar();
-
-private:
-    void createTopLeftGroupBox();
-    void createTopRightGroupBox();
-    void createBottomLeftTabWidget();
-    void createBottomRightGroupBox();
-    void createProgressBar();
-
-    QLabel *styleLabel;
-    QComboBox *styleComboBox;
-    QCheckBox *useStylePaletteCheckBox;
-    QCheckBox *disableWidgetsCheckBox;
-//! [0]
-
-    QGroupBox *topLeftGroupBox;
-    QRadioButton *radioButton1;
-    QRadioButton *radioButton2;
-    QRadioButton *radioButton3;
-    QCheckBox *checkBox;
-
-    QGroupBox *topRightGroupBox;
-    QPushButton *defaultPushButton;
-    QPushButton *togglePushButton;
-    QPushButton *flatPushButton;
-
-    QTabWidget *bottomLeftTabWidget;
-    QTableWidget *tableWidget;
-    QTextEdit *textEdit;
-
-    QGroupBox *bottomRightGroupBox;
-    QLineEdit *lineEdit;
-    QSpinBox *spinBox;
-    QDateTimeEdit *dateTimeEdit;
-    QSlider *slider;
-    QScrollBar *scrollBar;
-    QDial *dial;
-
-    QProgressBar *progressBar;
-//! [1]
-};
-//! [1]
-
-#endif
diff --git a/examples/widgets/widgets/widgets.pro b/examples/widgets/widgets/widgets.pro
index 45d9e662df..dbfffab4c4 100644
--- a/examples/widgets/widgets/widgets.pro
+++ b/examples/widgets/widgets/widgets.pro
@@ -8,7 +8,6 @@ SUBDIRS       = analogclock \
                 shapedclock \
                 sliders \
                 spinboxes \
-                styles \
                 tablet \
                 tetrix \
                 tooltips \