com.trolltech.qt.gui
Class QConicalGradient

java.lang.Object
  com.trolltech.qt.internal.QSignalEmitterInternal
      com.trolltech.qt.QSignalEmitter
          com.trolltech.qt.QtJambiObject
              com.trolltech.qt.gui.QGradient
                  com.trolltech.qt.gui.QConicalGradient

All Implemented Interfaces:

QtJambiInterface, java.lang.Cloneable

public class QConicalGradient
extends QGradient
implements java.lang.Cloneable

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, and The Gradients Demo.

Nested Class Summary

Nested classes/interfaces inherited from class com.trolltech.qt.gui.QGradient

QGradient.CoordinateMode, QGradient.Spread, QGradient.Type

Nested classes/interfaces inherited from class com.trolltech.qt.QSignalEmitter

QSignalEmitter.AbstractSignal, QSignalEmitter.PrivateSignal0, QSignalEmitter.PrivateSignal1, QSignalEmitter.PrivateSignal2, QSignalEmitter.PrivateSignal3, QSignalEmitter.PrivateSignal4, QSignalEmitter.PrivateSignal5, QSignalEmitter.PrivateSignal6, QSignalEmitter.PrivateSignal7, QSignalEmitter.PrivateSignal8, QSignalEmitter.PrivateSignal9, QSignalEmitter.Signal0, QSignalEmitter.Signal1, QSignalEmitter.Signal2, QSignalEmitter.Signal3, QSignalEmitter.Signal4, QSignalEmitter.Signal5, QSignalEmitter.Signal6, QSignalEmitter.Signal7, QSignalEmitter.Signal8, QSignalEmitter.Signal9

Nested classes/interfaces inherited from class com.trolltech.qt.internal.QSignalEmitterInternal

com.trolltech.qt.internal.QSignalEmitterInternal.AbstractSignalInternal

Field Summary

Fields inherited from class com.trolltech.qt.internal.QSignalEmitterInternal

currentSender

Constructor Summary

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

QConicalGradient(double cx, double cy, double startAngle)
Constructs a conical gradient with the given center (cx, cy), starting the interpolation at the given angle.

QConicalGradient(QPointF center, double startAngle)
Constructs a conical gradient with the given center, starting the interpolation at the given angle.

Method Summary

double	angle() Returns the start angle of the conical gradient in logical coordinates.
QPointF	center() Returns the center of the conical gradient in logical coordinates.
QConicalGradient	clone() This method is reimplemented for internal reasons
void	setAngle(double angle) Sets angle to be the start angle for this conical gradient in logical coordinates.
void	setCenter(double x, double y) This is an overloaded member function, provided for convenience.
void	setCenter(QPointF center) Sets the center of this conical gradient in logical coordinates to center.

Methods inherited from class com.trolltech.qt.gui.QGradient

coordinateMode, setColorAt, setCoordinateMode, setSpread, setStops, spread, stops, type

Methods inherited from class com.trolltech.qt.QtJambiObject

dispose, disposed, equals, finalize, reassignNativeResources, tr, tr, tr

Methods inherited from class com.trolltech.qt.QSignalEmitter

blockSignals, disconnect, disconnect, signalsBlocked, signalSender, thread

Methods inherited from class com.trolltech.qt.internal.QSignalEmitterInternal

__qt_signalInitialization

Methods inherited from class java.lang.Object

getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.trolltech.qt.QtJambiInterface

disableGarbageCollection, nativeId, nativePointer, reenableGarbageCollection, setJavaOwnership

Constructor Detail

QConicalGradient

public QConicalGradient()

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

See also:

QGradient::setColorAt(), setCenter(), and setAngle().

QConicalGradient

public QConicalGradient(QPointF center,
                        double startAngle)

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

See also:

QGradient::setColorAt(), and QGradient::setStops().

QConicalGradient

public QConicalGradient(double cx,
                        double cy,
                        double startAngle)

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

See also:

QGradient::setColorAt(), and QGradient::setStops().

Method Detail

angle

public final double angle()

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

See also:

setAngle(), and stops().

center

public final QPointF center()

Returns the center of the conical gradient in logical coordinates.

See also:

setCenter(), and stops().

setAngle

public final void setAngle(double angle)

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

See also:

angle().

setCenter

public final void setCenter(QPointF center)

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

See also:

center().

setCenter

public final void setCenter(double x,
                            double y)

This is an overloaded member function, provided for convenience.

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

See also:

center().

clone

public QConicalGradient clone()

This method is reimplemented for internal reasons

Overrides:

clone in class QGradient