/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the documentation of the Qt Graphical Effects module.
**
** $QT_BEGIN_LICENSE:FDL$
** 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 Digia.  For licensing terms and
** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/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: http://www.gnu.org/copyleft/fdl.html.
** $QT_END_LICENSE$
**
****************************************************************************/

/*!
    \qmltype ConicalGradient
    \inqmlmodule QtGraphicalEffects 1.0
    \since QtGraphicalEffects 1.0
    \inherits QtQuick2::Item
    \ingroup qtgraphicaleffects-gradient
    \brief Draws a conical gradient.

    A gradient is defined by two or more colors, which are blended seamlessly.
    The colors start from the specified angle and end at 360 degrees larger
    angle value.

    \table
    \header
        \li Effect applied
    \row
        \li \image ConicalGradient.png
    \endtable

    \section1 Example

    The following example shows how to apply the effect.
    \snippet snippets/ConicalGradient-example.qml example

*/

/*!
    \qmlproperty Gradient QtGraphicalEffects1::ConicalGradient::gradient

    A gradient is defined by two or more colors, which are blended seamlessly.
    The colors are specified as a set of GradientStop child items, each of which
    defines a position on the gradient (from 0.0 to 1.0), and a color.
    The position of each GradientStop is defined by the position property.
    The color is defined by the color property.

    \table
    \header
    \li Output examples with different gradient values
    \li
    \li
    \row
        \li \image ConicalGradient_gradient1.png
        \li \image ConicalGradient_gradient2.png
        \li \image ConicalGradient_gradient3.png
    \row
        \li \b {gradient:} \code
Gradient {
  GradientStop { position: 0.000
  color: Qt.rgba(1, 0, 0, 1) }
  GradientStop { position: 0.167;
  color: Qt.rgba(1, 1, 0, 1) }
  GradientStop { position: 0.333;
  color: Qt.rgba(0, 1, 0, 1) }
  GradientStop { position: 0.500;
  color: Qt.rgba(0, 1, 1, 1) }
  GradientStop { position: 0.667;
  color: Qt.rgba(0, 0, 1, 1) }
  GradientStop { position: 0.833;
  color: Qt.rgba(1, 0, 1, 1) }
  GradientStop { position: 1.000;
  color: Qt.rgba(1, 0, 0, 1) }
}
    \endcode
        \li \b {gradient:} \code
Gradient {
  GradientStop { position: 0.0
  color: "#F0F0F0"
  }
  GradientStop { position: 0.5
  color: "#000000"
  }
  GradientStop { position: 1.0
  color: "#F0F0F0"
  }
}
    \endcode
        \li \b {gradient:} \code
Gradient {
  GradientStop { position: 0.0
    color: "#00000000"
  }
  GradientStop { position: 1.0
    color: "#FF000000"
  }
}
    \endcode
    \row
        \li \l angle: 0
        \li \l angle: 0
        \li \l angle: 0
    \row
        \li \l horizontalOffset: 0
        \li \l horizontalOffset: 0
        \li \l horizontalOffset: 0
    \row
        \li \l verticalOffset: 0
        \li \l verticalOffset: 0
        \li \l verticalOffset: 0
    \endtable

*/

/*!
    \qmlproperty variant QtGraphicalEffects1::ConicalGradient::source

    This property defines the item that is going to be filled with gradient. Source
    item gets rendered into an intermediate pixel buffer and the alpha values
    from the result are used to determine the gradient's pixels visibility in
    the display.
    The default value for source is undefined and in that case whole effect area
    is filled with gradient.

    \table
    \header
    \li Output examples with different source values
    \li
    \row
        \li \image ConicalGradient_maskSource1.png
        \li \image ConicalGradient_maskSource2.png
    \row
        \li \b { source: undefined }
        \li \b { source:  }
    \row
        \li \l angle: 0
        \li \l angle: 0
    \row
        \li \l horizontalOffset: 0
        \li \l horizontalOffset: 0
    \row
        \li \l verticalOffset: 0
        \li \l verticalOffset: 0
    \endtable

*/

/*!
    \qmlproperty real QtGraphicalEffects1::ConicalGradient::angle

    This property defines the starting angle where the color at the gradient
    position of 0.0 is rendered. Colors at larger position values are rendered
    into larger angle values and blended seamlessly. Angle values increase
    clockwise.

    \table
    \header
    \li Output examples with different angle values
    \li
    \li
    \row
        \li \image ConicalGradient_angle1.png
        \li \image ConicalGradient_angle2.png
        \li \image ConicalGradient_angle3.png
    \row
        \li \b { angle: 0 }
        \li \b { angle: 45 }
        \li \b { angle: 185 }
    \row
        \li \l horizontalOffset: 0
        \li \l horizontalOffset: 0
        \li \l horizontalOffset: 0
    \row
        \li \l verticalOffset: 0
        \li \l verticalOffset: 0
        \li \l verticalOffset: 0
    \endtable

*/

/*!
    \qmlproperty real QtGraphicalEffects1::ConicalGradient::horizontalOffset
    \qmlproperty real QtGraphicalEffects1::ConicalGradient::verticalOffset

    The HorizontalOffset and verticalOffset properties define the offset in
    pixels for the center point of the gradient compared to the item center.

    The value ranges from -inf to inf. By default, the properties are set to \c 0.

    \table
    \header
    \li Output examples with different horizontalOffset values
    \li
    \li
    \row
        \li \image ConicalGradient_horizontalOffset1.png
        \li \image ConicalGradient_horizontalOffset2.png
        \li \image ConicalGradient_horizontalOffset3.png
    \row
        \li \b { horizontalOffset: -50 }
        \li \b { horizontalOffset: 0 }
        \li \b { horizontalOffset: 50 }
    \row
        \li \l angle: 0
        \li \l angle: 0
        \li \l angle: 0
    \row
        \li \l verticalOffset: 0
        \li \l verticalOffset: 0
        \li \l verticalOffset: 0
    \endtable

*/

/*!
    \qmlproperty bool QtGraphicalEffects1::ConicalGradient::cached

    This property allows the effect output pixels to be cached in order to improve the rendering performance.

    Every time the source or effect properties are changed, the pixels in the cache must be updated.
    Memory consumption is increased, because an extra buffer of memory is required for storing the effect output.

    It is recommended to disable the cache when the source or the effect properties are animated.

    By default, the property is set to \c false.

*/