RadialGradient QML Type

The following example shows how to apply the effect.

import QtQuick
import Qt5Compat.GraphicalEffects

Item {
    width: 300
    height: 300

    RadialGradient {
        anchors.fill: parent
        gradient: Gradient {
            GradientStop { position: 0.0; color: "white" }
            GradientStop { position: 0.5; color: "black" }
        }
    }
}

This property defines the rotation of the gradient around its center point. The rotation is only visible when the horizontalRadius and verticalRadius properties are not equal. The angle is given in degrees and the default value is 0.

Output examples with different angle values
angle: 0	angle: 45	angle: 90
horizontalOffset: 0	horizontalOffset: 0	horizontalOffset: 0
verticalOffset: 0	verticalOffset: 0	verticalOffset: 0
horizontalRadius: 100	horizontalRadius: 100	horizontalRadius: 100
verticalRadius: 300	verticalRadius: 300	verticalRadius: 300

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 false.

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.

Output examples with different gradient values
gradient:   Sélectionnez 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) } }	gradient:   Sélectionnez Gradient { GradientStop { position: 0.0 color: "#F0F0F0" } GradientStop { position: 0.5 color: "#000000" } GradientStop { position: 1.0 color: "#F0F0F0" } }	gradient:   Sélectionnez Gradient { GradientStop { position: 0.0 color: "#00000000" } GradientStop { position: 1.0 color: "#FF000000" } }
horizontalOffset: 0	horizontalOffset: 0	horizontalOffset: 0
verticalOffset: 0	verticalOffset: 0	verticalOffset: 0
horizontalRadius: 300	horizontalRadius: 300	horizontalRadius: 300
verticalRadius: 300	verticalRadius: 300	verticalRadius: 300
angle: 0	angle: 0	angle: 0

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 0.

Output examples with different horizontalOffset values
horizontalOffset: -150	horizontalOffset: 0	horizontalOffset: 150
verticalOffset: 0	verticalOffset: 0	verticalOffset: 0
horizontalRadius: 300	horizontalRadius: 300	horizontalRadius: 300
verticalRadius: 300	verticalRadius: 300	verticalRadius: 300
angle: 0	angle: 0	angle: 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.

Output examples with different horizontalRadius values
horizontalRadius: 300	horizontalRadius: 100
horizontalOffset: 0	horizontalOffset: 0
verticalOffset: 0	verticalOffset: 0
verticalRadius: 300	verticalRadius: 300
angle: 0	angle: 0
gradient: QQuickGradient(0xa05fb10)	gradient: QQuickGradient(0xa05fb10)

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.

Output examples with different source values
source: undefined	source: Image { source: images/butterfly.png }
horizontalOffset: 0	horizontalOffset: 0
verticalOffset: 0	verticalOffset: 0
horizontalRadius: 300	horizontalRadius: 300
verticalRadius: 300	verticalRadius: 300
angle: 0	angle: 0

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 0.

Output examples with different horizontalOffset values
horizontalOffset: -150	horizontalOffset: 0	horizontalOffset: 150
verticalOffset: 0	verticalOffset: 0	verticalOffset: 0
horizontalRadius: 300	horizontalRadius: 300	horizontalRadius: 300
verticalRadius: 300	verticalRadius: 300	verticalRadius: 300
angle: 0	angle: 0	angle: 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.

Output examples with different horizontalRadius values
horizontalRadius: 300	horizontalRadius: 100
horizontalOffset: 0	horizontalOffset: 0
verticalOffset: 0	verticalOffset: 0
verticalRadius: 300	verticalRadius: 300
angle: 0	angle: 0
gradient: QQuickGradient(0xa05fb10)	gradient: QQuickGradient(0xa05fb10)