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/*!
    \page qtquickcontrols2-material.html
    \title Material Style

    The Material Style is based on the Google Material Design Guidelines.
    \l{detailed-desc-material}{More...}

    \styleimport {QtQuick.Controls.Material 2.1} {Qt 5.7}

    \section1 Attached Properties

    \list
        \li \l {accent-attached-prop}{\b accent} : color
        \li \l {background-attached-prop}{\b background} : color
        \li \l {foreground-attached-prop}{\b foreground} : color
        \li \l {primary-attached-prop}{\b primary} : color
        \li \l {theme-attached-prop}{\b theme} : enumeration
    \endlist

    \section1 Attached Methods

    \list
        \li color \l {color-attached-method}{\b color}(enumeration predefined)
    \endlist

    \section1 Detailed Description
    \target detailed-desc-material

    The Material style is based on the \l {https://www.google.com/design/spec/material-design/introduction.html}
    {Google Material Design Guidelines}. It allows for a unified experience
    across platforms and device sizes.

    \image qtquickcontrols2-material.png
    \caption The Material style in light and dark themes

    \note The Material style is not a native Android style. The Material
    style is a 100% cross-platform Qt Quick Controls 2 style implementation that
    follows the Google Material Design Guidelines. The style runs on any
    platform, and looks more or less identical everywhere. Minor differences
    may occur due to differences in available system fonts and font rendering
    engines.

    \section2 Customization

    The Material style allows customizing five attributes, \l {theme-attached-prop}{theme},
    \l {primary-attached-prop}{primary}, \l {accent-attached-prop}{accent},
    \l {foreground-attached-prop}{foreground}, and \l {background-attached-prop}{background}.

    \image qtquickcontrols2-material-attributes.png

    The following example illustrates how to create a red \e stop button with light text:

    \table
        \row
            \li
                \qml
                import QtQuick 2.0
                import QtQuick.Controls 2.0
                import QtQuick.Controls.Material 2.0

                Button {
                    text: "Stop"
                    highlighted: true

                    Material.accent: Material.Red
                    Material.theme: Material.Dark
                }
                \endqml
            \li
                \image qtquickcontrols2-material-button.png
    \endtable

    All attributes can be specified for any window or item, and they automatically
    propagate to children in the same manner as \l {Control::font}{fonts}. In the
    following example, the window and all three radio buttons appear in the dark
    theme using a purple accent color:

    \table
        \row
            \li
                \qml
                import QtQuick 2.0
                import QtQuick.Controls 2.0
                import QtQuick.Controls.Material 2.0

                ApplicationWindow {
                    visible: true

                    Material.theme: Material.Dark
                    Material.accent: Material.Purple

                    Column {
                        anchors.centerIn: parent

                        RadioButton { text: qsTr("Small") }
                        RadioButton { text: qsTr("Medium");  checked: true }
                        RadioButton { text: qsTr("Large") }
                    }
                }
                \endqml
            \li
                \image qtquickcontrols2-material-dark.png
    \endtable

    In addition to specifying the attributes in QML, it is also possible to
    specify them via environment variables or in a \l {qtquickcontrols2-conf}
    {configuration file}.

    \section3 Environment Variables

    \table
        \header
            \li Variable
            \li Description
        \row
            \li \c QT_QUICK_CONTROLS_MATERIAL_THEME
            \li The value can be one of the available \l {theme-attached-prop}{themes},
                for example \c "Dark".
        \row
            \li \c QT_QUICK_CONTROLS_MATERIAL_ACCENT
            \li The value can be any \l {colorbasictypedocs}{color}, but it is recommended
                to use one of the \l {Pre-defined Colors}{pre-defined colors}, for example
                for example \c "Teal".
        \row
            \li \c QT_QUICK_CONTROLS_MATERIAL_PRIMARY
            \li The value can be any \l {colorbasictypedocs}{color}, but it is recommended
                to use one of the \l {Pre-defined Colors}{pre-defined colors}, for example
                for example \c "BlueGrey".
        \row
            \li \c QT_QUICK_CONTROLS_MATERIAL_FOREGROUND
            \li The value can be any \l {colorbasictypedocs}{color}, or one of the
                \l {Pre-defined Colors}{pre-defined colors}.

        \row
            \li \c QT_QUICK_CONTROLS_MATERIAL_BACKGROUND
            \li The value can be any \l {colorbasictypedocs}{color}, or one of the
                \l {Pre-defined Colors}{pre-defined colors}.
    \endtable

    \section2 Dependency

    The Material style must be separately imported to gain access to the
    attributes that are specific to the Material style. It should be noted
    that regardless of the references to the Material style, the same
    application code runs with any other style. Material-specific attributes
    only have an effect when the application is run with the Material style.

    If the Material style is imported in a QML file that is always loaded, the
    Material style must be deployed with the application in order to be able
    to run the application regardless of which style the application is run with.
    By using \l {Using File Selectors with Qt Quick Controls 2}{file selectors},
    style-specific tweaks can be applied without creating a hard dependency to
    a style.

    \section2 Pre-defined Colors

    Even though primary and accent can be any \l {colorbasictypedocs}{color}, it
    is recommended to use one of the pre-defined colors that have been designed
    to work well with the rest of the Material style palette:

    Available pre-defined colors:
    \value Material.Red \stylecolor {#F44336} {}
    \value Material.Pink \stylecolor {#E91E63} {(default accent)}
    \value Material.Purple \stylecolor {#9C27B0} {}
    \value Material.DeepPurple \stylecolor {#673AB7} {}
    \value Material.Indigo \stylecolor {#3F51B5} {(default primary)}
    \value Material.Blue \stylecolor {#2196F3} {}
    \value Material.LightBlue \stylecolor {#03A9F4} {}
    \value Material.Cyan \stylecolor {#00BCD4} {}
    \value Material.Teal \stylecolor {#009688} {}
    \value Material.Green \stylecolor {#4CAF50} {}
    \value Material.LightGreen \stylecolor {#8BC34A} {}
    \value Material.Lime \stylecolor {#CDDC39} {}
    \value Material.Yellow \stylecolor {#FFEB3B} {}
    \value Material.Amber \stylecolor {#FFC107} {}
    \value Material.Orange \stylecolor {#FF9800} {}
    \value Material.DeepOrange \stylecolor {#FF5722} {}
    \value Material.Brown \stylecolor {#795548} {}
    \value Material.Grey \stylecolor {#9E9E9E} {}
    \value Material.BlueGrey \stylecolor {#607D8B} {}

    \b {See also} \l {Default Style}, \l {Universal Style}

    \section1 Attached Property Documentation

    \styleproperty {Material.accent} {color} {accent-attached-prop}
    \target accent-attached-prop
    This attached property holds the accent color of the theme. The property
    can be attached to any window or item. The value is propagated to children.

    The default value is \c Material.Pink.

    \note Even though the accent can be any \l {colorbasictypedocs}{color}, it is
    recommended to use one of the \l {pre-defined colors} that have been designed
    to work well with the rest of the Material style palette.

    \endstyleproperty

    \styleproperty {Material.background} {color} {background-attached-prop}
    \target background-attached-prop
    This attached property holds the background color of the theme. The property
    can be attached to any window or item. The value is propagated to children.

    The default value is theme-specific (light or dark).

    \endstyleproperty

    \styleproperty {Material.foreground} {color} {foreground-attached-prop}
    \target foreground-attached-prop
    This attached property holds the foreground color of the theme. The property
    can be attached to any window or item. The value is propagated to children.

    The default value is theme-specific (light or dark).

    \endstyleproperty

    \styleproperty {Material.primary} {color} {primary-attached-prop}
    \target primary-attached-prop
    This attached property holds the primary color of the theme. The property
    can be attached to any window or item. The value is propagated to children.

    The default value is \c Material.Indigo.

    \note Even though the primary can be any \l {colorbasictypedocs}{color}, it is
    recommended to use one of the \l {pre-defined colors} that have been designed
    to work well with the rest of the Material style palette.

    \endstyleproperty

    \styleproperty {Material.theme} {enumeration} {theme-attached-prop}
    \target theme-attached-prop
    This attached property holds whether the theme is light or dark. The property
    can be attached to any window or item. The value is propagated to children.

    Available themes:
    \value Material.Light Light theme (default)
    \value Material.Dark Dark theme
    \value Material.System System theme

    Setting the theme to \c System chooses either the light or dark theme based
    on the system theme colors. However, when reading the value of the theme
    property, the value is never \c System, but the actual theme.

    \endstyleproperty

    \section1 Attached Method Documentation

    \stylemethod {color} {color} {enumeration} {predefined} {color-attached-method}
    \target color-attached-method
    This attached method returns the color value of the specified \l {pre-defined colors}
    {pre-defined color}.

    \qml
    import QtQuick 2.0
    import QtQuick.Controls.Material 2.0

    Rectangle {
        color: Material.color(Material.Red)
    }
    \endqml

    \endstylemethod

    \section1 Related Information

    \list
      \li \l{Styling Qt Quick Controls 2}
    \endlist
*/