QLinearGradient Class Reference

The QLinearGradient class is used in combination with QBrush to specify a linear gradient brush.

  1. #include <QLinearGradient>

Inherits: QGradient.

Detailed Description

The QLinearGradient class is used in combination with QBrush to specify a linear gradient brush.

Linear gradients interpolate colors between start and end points. Outside these points the gradient is either padded, reflected or repeated depending on the currently set spread method:

PadSpread (default) ReflectSpread RepeatSpread

The colors in a gradient is defined using stop points of the QGradientStop type, i.e. a position and a color. Use the QGradient::setColorAt() or the QGradient::setStops() function to define the stop points. It is the gradient's complete set of stop points that describes how the gradient area should be filled. If no stop points have been specified, a gradient of black at 0 to white at 1 is used.

In addition to the functions inherited from QGradient, the QLinearGradient class provides the finalStop() function which returns the final stop point of the gradient, and the start() function returning the start point of the gradient.

See also QRadialGradient, QConicalGradient, and The Gradients Demo.

Public Functions

Toggle details QLinearGradient

QLinearGradientQLinearGradient () ()

Constructs a default linear gradient with interpolation area between (0, 0) and (1, 1).

See also QGradient::setColorAt(), setStart(), and setFinalStop().

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Toggle details QLinearGradient

QLinearGradientQLinearGradient ( const QPointF &start , const QPointF &finalStop ...) ( const QPointF &start , const QPointF &finalStop )

Constructs a linear gradient with interpolation area between the given start point and finalStop.

Note: The expected parameter values are in pixels.

See also QGradient::setColorAt() and QGradient::setStops().

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Toggle details QLinearGradient

QLinearGradientQLinearGradient ( qreal x1 , qreal y1 , qreal x2 , qreal y2 ...) ( qreal x1 , qreal y1 , qreal x2 , qreal y2 )

Constructs a linear gradient with interpolation area between (x1, y1) and (x2, y2).

Note: The expected parameter values are in pixels.

See also QGradient::setColorAt() and QGradient::setStops().

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Toggle details QPointF QLinearGradient

finalStopfinalStop () ()const

Returns the final stop point of this linear gradient in logical coordinates.

See also setFinalStop() and QGradient::stops().

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Toggle details void QLinearGradient

setFinalStopsetFinalStop ( const QPointF &stop ) ( const QPointF &stop )

Sets the final stop point of this linear gradient in logical coordinates to stop.

See also finalStop().

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Toggle details void QLinearGradient

setFinalStopsetFinalStop ( qreal x , qreal y ) ( qreal x , qreal y )

This is an overloaded function.

Sets the final stop point of this linear gradient in logical coordinates to x, y.

See also start().

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Toggle details void QLinearGradient

setStartsetStart ( const QPointF &start ) ( const QPointF &start )

Sets the start point of this linear gradient in logical coordinates to start.

See also start().

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Toggle details void QLinearGradient

setStartsetStart ( qreal x , qreal y ) ( qreal x , qreal y )

This is an overloaded function.

Sets the start point of this linear gradient in logical coordinates to x, y.

See also start().

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Toggle details QPointF QLinearGradient

startstart () ()const

Returns the start point of this linear gradient in logical coordinates.

See also setStart() and QGradient::stops().

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