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author | Jerome Pasion <jerome.pasion@digia.com> | 2012-09-24 16:57:55 +0200 |
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committer | The Qt Project <gerrit-noreply@qt-project.org> | 2012-09-25 11:31:42 +0200 |
commit | 1ecb9cbdc40dc177fcb906f983f6b47714f0c521 (patch) | |
tree | f7ad8af2d61b4c8511ea23656fa04da20ca84304 /src/effects/RadialGradient.qml | |
parent | 405a17b16855863e24e9fdd18420ef482f25ae50 (diff) | |
download | qtgraphicaleffects-1ecb9cbdc40dc177fcb906f983f6b47714f0c521.tar.gz |
Doc: Modularized documentation.
-moved API documentation in QML files
-moved snippets, images, and qdoc files to src/effects/doc
-deleted old .pri and .qdocconf files
-fixed relative paths
Change-Id: I4e757e707b5f93a215506f8c2cbb7eb1f2321d4c
Reviewed-by: Geir Vattekar <geir.vattekar@digia.com>
Diffstat (limited to 'src/effects/RadialGradient.qml')
-rw-r--r-- | src/effects/RadialGradient.qml | 273 |
1 files changed, 273 insertions, 0 deletions
diff --git a/src/effects/RadialGradient.qml b/src/effects/RadialGradient.qml index a5e1e2f..fbfe227 100644 --- a/src/effects/RadialGradient.qml +++ b/src/effects/RadialGradient.qml @@ -41,16 +41,289 @@ import QtQuick 2.0 import "private" +/*! + \qmltype RadialGradient + \inqmlmodule QtGraphicalEffects 1.0 + \since QtGraphicalEffects 1.0 + \inherits QtQuick2::Item + \ingroup qtgraphicaleffects-gradient + \brief Draws a radial gradient. + + A gradient is defined by two or more colors, which are blended seamlessly. + The colors start from the middle of the item and end at the borders. + + \table + \header + \li Effect applied + \row + \li \image RadialGradient.png + \endtable + + \section1 Example + + The following example shows how to apply the effect. + \snippet RadialGradient-example.qml example + +*/ Item { id: rootItem + + /*! + 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. + */ property bool cached: false + + /*! + The HorizontalOffset and verticalOffset properties define the offset in + pixels for the center point of the gradient compared to the item center. + + The values range from -inf to inf. By default, these properties are set + to \c 0. + + \table + \header + \li Output examples with different horizontalOffset values + \li + \li + \row + \li \image RadialGradient_horizontalOffset1.png + \li \image RadialGradient_horizontalOffset2.png + \li \image RadialGradient_horizontalOffset3.png + \row + \li \b { horizontalOffset: -150 } + \li \b { horizontalOffset: 0 } + \li \b { horizontalOffset: 150 } + \row + \li \l verticalOffset: 0 + \li \l verticalOffset: 0 + \li \l verticalOffset: 0 + \row + \li \l horizontalRadius: 300 + \li \l horizontalRadius: 300 + \li \l horizontalRadius: 300 + \row + \li \l verticalRadius: 300 + \li \l verticalRadius: 300 + \li \l verticalRadius: 300 + \row + \li \l angle: 0 + \li \l angle: 0 + \li \l angle: 0 + \endtable + + */ property real horizontalOffset: 0.0 property real verticalOffset: 0.0 + + /*! + The HorizontalRadius and verticalRadius properties define the shape and + size of the radial gradient. If the radiuses are equal, the shape of the + gradient is a circle. If the horizontal and vertical radiuses differ, + the shape is elliptical. The radiuses are given in pixels. + + The value ranges from -inf to inf. By default, horizontalRadius is bound + to width and verticalRadius is bound to height. + + \table + \header + \li Output examples with different horizontalRadius values + \li + \li + \row + \li \image RadialGradient_horizontalRadius1.png + \li \image RadialGradient_horizontalRadius2.png + \row + \li \b { horizontalRadius: 300 } + \li \b { horizontalRadius: 100 } + \row + \li \l horizontalOffset: 0 + \li \l horizontalOffset: 0 + \row + \li \l verticalOffset: 0 + \li \l verticalOffset: 0 + \row + \li \l verticalRadius: 300 + \li \l verticalRadius: 300 + \row + \li \l angle: 0 + \li \l angle: 0 + \row + \li \l gradient: QQuickGradient(0xa05fb10) + \li \l gradient: QQuickGradient(0xa05fb10) + \endtable + + */ property real horizontalRadius: width property real verticalRadius: height + + /*! + This property defines the rotation of the gradient around its center + point. The rotation is only visible when the + \l{RadialGradient::horizontalRadius}{horizontalRadius} and + \l{RadialGradient::verticalRadius}{verticalRadius} properties are not + equal. The angle is given in degrees and the default value is \c 0. + + \table + \header + \li Output examples with different angle values + \li + \li + \row + \li \image RadialGradient_angle1.png + \li \image RadialGradient_angle2.png + \li \image RadialGradient_angle3.png + \row + \li \b { angle: 0 } + \li \b { angle: 45 } + \li \b { angle: 90 } + \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 + \row + \li \l horizontalRadius: 100 + \li \l horizontalRadius: 100 + \li \l horizontalRadius: 100 + \row + \li \l verticalRadius: 300 + \li \l verticalRadius: 300 + \li \l verticalRadius: 300 + \endtable + */ property real angle: 0.0 + + /*! + 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 + \li + \row + \li \image RadialGradient_maskSource1.png + \li \image RadialGradient_maskSource2.png + \row + \li \b { source: undefined } + \li \b { source: Image { source: images/butterfly.png } } + \row + \li \l horizontalOffset: 0 + \li \l horizontalOffset: 0 + \row + \li \l verticalOffset: 0 + \li \l verticalOffset: 0 + \row + \li \l horizontalRadius: 300 + \li \l horizontalRadius: 300 + \row + \li \l verticalRadius: 300 + \li \l verticalRadius: 300 + \row + \li \l angle: 0 + \li \l angle: 0 + \endtable + */ property variant source + /*! + 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 setting the + position property. The color is defined by setting the color property. + + \table + \header + \li Output examples with different gradient values + \li + \li + \row + \li \image RadialGradient_gradient1.png + \li \image RadialGradient_gradient2.png + \li \image RadialGradient_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 horizontalOffset: 0 + \li \l horizontalOffset: 0 + \li \l horizontalOffset: 0 + \row + \li \l verticalOffset: 0 + \li \l verticalOffset: 0 + \li \l verticalOffset: 0 + \row + \li \l horizontalRadius: 300 + \li \l horizontalRadius: 300 + \li \l horizontalRadius: 300 + \row + \li \l verticalRadius: 300 + \li \l verticalRadius: 300 + \li \l verticalRadius: 300 + \row + \li \l angle: 0 + \li \l angle: 0 + \li \l angle: 0 + \endtable + */ property Gradient gradient: Gradient { GradientStop { position: 0.0; color: "white" } GradientStop { position: 1.0; color: "black" } |