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/*!
    \page styling-gauge.html
    \title Styling Gauge
    \brief Tutorial for styling the Gauge control.
    \ingroup stylingtutorials

    As GaugeStyle's documentation adequately covers common use cases, this
    tutorial will cover a different scenario: one where the gauge's tickmarks
    cover the value bar, instead of being aligned to the left or right of it.

    \target styling-gauge-valueBar
    \section2 The Value Bar Component

    The \l {QtQuick.Controls.Styles::GaugeStyle::}{valueBar}
    component is resized according to the gauge's value; if the value is low,
    the bar will be small, and vice versa.

    Starting from the default style, we'll change the color of the value bar to
    orange, and increase its width slightly:

    \snippet styling-gauge.qml valueBar

    \image styling-gauge-valueBar.png

    As mentioned in the documentation for GaugeStyle, \c implicitWidth needs to
    be set when defining your own value bar.

    \target styling-gauge-foreground
    \section2 The Foreground Component

    The \l {QtQuick.Controls.Styles::GaugeStyle::}{foreground}
    component covers the full width and height of the value bar, even when the
    value bar is not at its highest. By default, the foreground component
    provides a "sheen". We'll choose to discard this, and leave it empty
    instead:

    \snippet styling-gauge.qml foreground

    \image styling-gauge-foreground.png

    \target styling-gauge-tickmark
    \section2 The Tickmark Component

    The \l {QtQuick.Controls.Styles::GaugeStyle::}{tickmark}
    component sits to the left or right of the value bar, depending on the
    control's \l {Gauge::tickmarkAlignment}{tickmarkAlignment}. In order to
    have the tickmarks cover the width of the value bar instead, we need to do
    two things:
    \list 1
        \li Remove the space the tickmarks previously assumed so that there is
            just enough space for margins between the tickmarks and value bar.
        \li Position the tickmarks according to the control's orientation and
            tickmark alignment.
    \endlist

    \snippet styling-gauge.qml tickmark

    In this case we chose \c 8 pixel margins, so we set the \c implicitWidth of
    the tickmarks to that.

    We account for every possible orientation and tickmark alignment, something
    that is not necessary if the gauge will only ever have one orientation and
    alignment. For example, if the gauge will always be of a vertical
    orientation and the tickmarks left-aligned, then it is enough to set the
    \c x property of the \c Rectangle to the following:

    \code
    x: parent.implicitWidth
    \endcode

    The value bar is \c 28 pixels wide, so we give the same width to our
    tickmarks so that they cover the width of it.

    \image styling-gauge-tickmark.png

    \target styling-gauge-minorTickmark
    \section2 The Minor Tickmark Component

    The \l {QtQuick.Controls.Styles::GaugeStyle::}{minorTickmark}
    component is almost identical to its larger counterpart, except that its
    width does not affect the layout of the gauge's components. We'll do
    similar adjustments to the ones in the previous section - the only
    difference being the height:

    \snippet styling-gauge.qml minorTickmark

    \image styling-gauge-minorTickmark.png

    \target styling-gauge-font-size
    \section2 Adjusting Font Size

    Finally, we increase the \l {Gauge::font}{font} size to \c 15 pixels:

    \snippet styling-gauge.qml font-size
    \image styling-gauge-font-size.png

    \target styling-gauge-complete
    \section2 Complete Source Code

    \snippet styling-gauge.qml all
*/