// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GFDL-1.3-no-invariants-only

/*!
    \page qtquickcontrols-configuration.html
    \keyword Qt Quick Controls Configuration File
    \title Qt Quick Controls Configuration File
    \keyword Qt Quick Controls 2 Configuration File

    Qt Quick Controls support a special configuration file, \c qtquickcontrols2.conf,
    which is built into an application's resources.

    The configuration file can specify the preferred style and certain style-specific
    attributes. The following example specifies that the preferred style is the \l {Material style}.
    Furthermore, when the application is run with the Material style, its theme is light and the
    accent and primary colors are teal and blue grey, respectively. However, if the application
    is run with the \l {Universal style} instead, the accent color is red and the appropriate theme
    is chosen based on the system theme colors.

    \code
    [Controls]
    Style=Material

    [Universal]
    Theme=System
    Accent=Red

    [Material]
    Theme=Light
    Accent=Teal
    Primary=BlueGrey
    \endcode

    It is possible to specify a custom location for the configuration file with
    the \l {Supported Environment Variables in Qt Quick Controls}
    {QT_QUICK_CONTROLS_CONF} environment variable.

    \section1 Controls Section

    The following values can be specified in a \c Controls section of the
    configuration file:

    \table
        \header
            \li Variable
            \li Description
        \row
            \li \c Style
            \li Specifies the style to run the application with.
                The value can be the name of one of the \l {Available Styles}{built-in styles}
                or a \l {Creating a Custom Style}{custom style}.
        \row
            \li \c FallbackStyle
            \li Specifies the style to use for controls that are not implemented.
                The style must be one of the \l {Available Styles}{built-in styles}.
                By default, the \l {Basic Style}{Basic} style is used.
    \endtable

    \section1 Imagine Section

    The following table lists values that can be used to configure the
    \l {Imagine style} in an \c Imagine section of the configuration file:

    \include qquickimaginestyle.qdocinc conf

    \section1 Material Section

    The following table lists values that can be used to configure the
    \l {Material style} in a \c Material section of the configuration file:

    \include qquickmaterialstyle.qdocinc conf

    \section1 Universal Section

    The following table lists values that can be used to configure the
    \l {Universal style} in a \c Universal section of the configuration file:

    \include qquickuniversalstyle.qdocinc conf

    \section1 Font Configuration

    The default \l {Control::font}{font} can be specified in a \c Font sub-group
    in each style's section in the configuration file:

    \code
    [Basic]
    Font\Family=Open Sans
    Font\PixelSize=20
    \endcode

    Supported font attributes:
    \table
        \header
            \li Variable
            \li Description
        \row
            \li \c Family
            \li The \l {QFont::family}{font family}.
        \row
            \li \c PointSize
            \li The \l {QFont::pointSizeF}{point size}.
        \row
            \li \c PixelSize
            \li The \l {QFont::pixelSize}{pixel size}.
        \row
            \li \c StyleHint
            \li The \l {QFont::styleHint}{style hint}.
                Available values: \c SansSerif, \c Helvetica, \c Serif, \c Times, \c TypeWriter, \c Courier,
                                  \c OldEnglish, \c Decorative, \c Monospace, \c Fantasy, \c Cursive.
        \row
            \li \c Weight
            \li The \l {QFont::}{weight}. Qt uses a weighting scale from \c 1 to \c 1000 compatible with OpenType. A weight of \c 1 will be thin,
                whilst \c 1000 will be extremely black.
                Available pre-defined weights: \c Thin (100), \c ExtraLight (200), \c Light (300), \c Normal (400),
                                               \c Medium (500), \c DemiBold (600), \c Bold (700), \c ExtraBold (800),
                                               \c Black (900).
        \row
            \li \c Style
            \li The \l {QFont::}{style}.
                Available values: \c StyleNormal, \c StyleItalic, \c StyleOblique.
    \endtable

    \section1 Palette Configuration

    The default \c palette can be configured for each style using the
    \c Palette sub-group in the configuration file. The \c Palette sub-group can be
    defined in two alternative ways:

    \code
    [Fusion]
    Palette\Window=#dedede
    Palette\WindowText=#212121
    \endcode

    See \l [QtQuick]{Palette} QML type for more information.

    \section1 Using the Configuration File in a Project

    In order to make it possible for Qt Quick Controls to find the configuration file,
    it must be built into application's resources using the \l {The Qt Resource System}.
    Here's an example \c .qrc file:

    \code
    <!DOCTYPE RCC><RCC version="1.0">
    <qresource prefix="/">
        <file>qtquickcontrols2.conf</file>
    </qresource>
    </RCC>
    \endcode

    \note Qt Quick Controls uses a file selector to load the configuration file. It
    is possible to provide a different configuration file for different platforms and
    locales. See \l QFileSelector documentation for more details.

    Finally, the \c .qrc file must be listed in the application's build file.
    For example:

    \if defined(onlinedocs)
      \tab {build-qt-app}{tab-cmake}{CMakeLists.txt (CMake)}{checked}
      \tab {build-qt-app}{tab-qmake}{.pro (qmake)}{}
      \tabcontent {tab-cmake}
    \else
      \section2 Using CMake
    \endif
    \badcode
      set(CMAKE_AUTORCC ON)
      qt_add_executable(my_app
          application.qrc
          main.cpp
          ...
      )
    \endcode
    \if defined(onlinedocs)
      \endtabcontent
      \tabcontent {tab-qmake}
    \else
      \section2 Using qmake
    \endif
    \badcode
      RESOURCES = application.qrc
      ...
    \endcode
    \if defined(onlinedocs)
      \endtabcontent
    \endif

    See also: \l {Build System Integration}

    \section1 Related Information

    \list
      \li \l{Styling Qt Quick Controls}
      \li \l{Supported Environment Variables in Qt Quick Controls}
    \endlist
*/