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[править] QLinearGradient Class Reference
^{[модуль QtGui ]}

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

 #include <QLinearGradient>

Inherits QGradient.

• Список всех членов, включая унаследованные

[править] Открытые функции

• QLinearGradient ()
• QLinearGradient ( const QPointF & start, const QPointF & finalStop )
• QLinearGradient ( qreal x1, qreal y1, qreal x2, qreal y2 )
• QPointF finalStop () const
• void setFinalStop ( const QPointF & stop )
• void setFinalStop ( qreal x, qreal y )
• void setStart ( const QPointF & start )
• void setStart ( qreal x, qreal y )
• QPointF start () const

• 8 public functions inherited from QGradient

[править] Подробное описание

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:

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.

[править] Описание функций-членов

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QLinearGradient::QLinearGradient ()

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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QLinearGradient::QLinearGradient ( const QPointF & start, const QPointF & finalStop )

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

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

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QLinearGradient::QLinearGradient ( qreal x1, qreal y1, qreal x2, qreal y2 )

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

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

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QPointF QLinearGradient::finalStop () const

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

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

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void QLinearGradient::setFinalStop ( const QPointF & stop )

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

Эта функция была введена в Qt 4.2.

See also finalStop().

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void QLinearGradient::setFinalStop ( qreal x, qreal y )

Эта перегруженная функция предоставлена для удобства.

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

Эта функция была введена в Qt 4.2.

Смотрите также start().

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void QLinearGradient::setStart ( const QPointF & start )

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

Эта функция была введена в Qt 4.2.

Смотрите также start().

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void QLinearGradient::setStart ( qreal x, qreal y )

Эта перегруженная функция предоставлена для удобства.

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

Эта функция была введена в Qt 4.2.

Смотрите также start().

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QPointF QLinearGradient::start () const

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

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