CopperSpice API  1.7.2
QConicalGradient Class Reference

The QConicalGradient class is used in combination with QBrush to specify a conical gradient brush. More...

Inheritance diagram for QConicalGradient:
QGradient

Public Methods

 QConicalGradient ()
 
 QConicalGradient (const QPointF &center, qreal startAngle)
 
 QConicalGradient (qreal cx, qreal cy, qreal startAngle)
 
qreal angle () const
 
QPointF center () const
 
void setAngle (qreal angle)
 
void setCenter (const QPointF &center)
 
void setCenter (qreal x, qreal y)
 
- Public Methods inherited from QGradient
CoordinateMode coordinateMode () const
 
InterpolationMode interpolationMode () const
 
bool operator!= (const QGradient &gradient) const
 
bool operator== (const QGradient &gradient) const
 
void setColorAt (qreal position, const QColor &color)
 
void setCoordinateMode (CoordinateMode mode)
 
void setInterpolationMode (InterpolationMode mode)
 
void setSpread (Spread spread)
 
void setStops (const QGradientStops &stops)
 
Spread spread () const
 
QGradientStops stops () const
 
Type type () const
 

Additional Inherited Members

- Public Types inherited from QGradient
enum  CoordinateMode
 
enum  Spread
 
enum  Type
 

Detailed Description

The QConicalGradient class is used in combination with QBrush to specify a conical gradient brush. Conical gradients interpolate interpolate colors counter-clockwise around a center point.

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 QConicalGradient class provides the angle() and center() functions returning the start angle and center of the gradient.

Note that the setSpread() function has no effect for conical gradients. The reason is that the conical gradient is closed by definition, i.e. the conical gradient fills the entire circle from 0 - 360 degrees, while the boundary of a radial or a linear gradient can be specified through its radius or final stop points, respectively.

See also
QLinearGradient, QRadialGradient

Constructor & Destructor Documentation

QConicalGradient::QConicalGradient ( )

Constructs a conical with center at (0, 0) starting the interpolation at angle 0.

See also
QGradient::setColorAt(), setCenter(), setAngle()
QConicalGradient::QConicalGradient ( const QPointF center,
qreal  startAngle 
)

Constructs a conical gradient with the given center, starting the interpolation at the given startAngle. The startAngle must be specified in degrees between 0 and 360.

See also
QGradient::setColorAt(), QGradient::setStops()
QConicalGradient::QConicalGradient ( qreal  cx,
qreal  cy,
qreal  startAngle 
)

Constructs a conical gradient with the given center (cx, cy), starting the interpolation at the given startAngle. The startAnglemust be specified in degrees between 0 and 360.

See also
QGradient::setColorAt(), QGradient::setStops()

Method Documentation

qreal QConicalGradient::angle ( ) const

Returns the start angle of the conical gradient in logical coordinates.

See also
setAngle(), stops()
QPointF QConicalGradient::center ( ) const

Returns the center of the conical gradient in logical coordinates.

See also
setCenter(), stops()
void QConicalGradient::setAngle ( qreal  angle)

Sets angle to be the start angle for this conical gradient in logical coordinates.

See also
angle()
void QConicalGradient::setCenter ( const QPointF center)

Sets the center of this conical gradient in logical coordinates to center.

See also
center()
void QConicalGradient::setCenter ( qreal  x,
qreal  y 
)
inline

Sets the center of this conical gradient in logical coordinates to (x, y).

See also
center()