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QtGui.QRadialGradient Class Reference

The QRadialGradient class is used in combination with QBrush to specify a radial gradient brush. More...

Inheritance diagram for QtGui.QRadialGradient:
Collaboration diagram for QtGui.QRadialGradient:

Public Member Functions

 QRadialGradient ()
 
 
 QRadialGradient (QRadialGradient copy)
 
 QRadialGradient (QPointF center, double radius)
 
 
 QRadialGradient (QPointF center, double radius, QPointF focalPoint)
 
 
 QRadialGradient (QPointF center, double centerRadius, QPointF focalPoint, double focalRadius)
 
 
 QRadialGradient (double cx, double cy, double radius)
 
 
 QRadialGradient (double cx, double cy, double radius, double fx, double fy)
 
 
 QRadialGradient (double cx, double cy, double centerRadius, double fx, double fy, double focalRadius)
 
 
override void CreateProxy ()
 
new void SetCenter (double x, double y)
 
 
new void SetFocalPoint (double x, double y)
 
 
new void Dispose ()
 
- Public Member Functions inherited from QtGui.QGradient
override bool Equals (object o)
 
override int GetHashCode ()
 
 QGradient ()
 
 QGradient (QGradient copy)
 
new void SetColorAt (double pos, QColor color)
 
 
new void Dispose ()
 

Protected Member Functions

 QRadialGradient (System.Type dummy)
 
- Protected Member Functions inherited from QtGui.QGradient
 QGradient (System.Type dummy)
 

Properties

QPointF Center [get, set]
 
 
double CenterRadius [get, set]
 
 
QPointF FocalPoint [get, set]
 
 
double FocalRadius [get, set]
 
 
double Radius [get, set]
 
 
- Properties inherited from QtGui.QGradient
QGradient.CoordinateMode coordinateMode [get, set]
 
 
QGradient.InterpolationMode interpolationMode [get, set]
 
QGradient.Spread spread [get, set]
 
 
QGradient.Type type [get]
 
 
virtual System.IntPtr SmokeObject [get, set]
 
static new QMetaObject StaticMetaObject [get]
 

Additional Inherited Members

- Public Types inherited from QtGui.QGradient
enum  CoordinateMode { LogicalMode = 0, ObjectBoundingMode = 2, StretchToDeviceMode = 1 }
  More...
 
enum  InterpolationMode { ColorInterpolation = 0, ComponentInterpolation = 1 }
 
enum  Spread { PadSpread = 0, ReflectSpread = 1, RepeatSpread = 2 }
  More...
 
enum  Type { ConicalGradient = 2, LinearGradient = 0, NoGradient = 3, RadialGradient = 1 }
  More...
 
- Static Public Member Functions inherited from QtGui.QGradient
static bool operator!= (QGradient one, QGradient other)
 
 
static bool operator== (QGradient one, QGradient gradient)
 
 
- Protected Attributes inherited from QtGui.QGradient
SmokeInvocation interceptor
 

Detailed Description

The QRadialGradient class is used in combination with QBrush to specify a radial gradient brush.

Qt supports both simple and extended radial gradients.

Simple radial gradients interpolate colors between a focal point and end points on a circle surrounding it. Extended radial gradients interpolate colors between a focal circle and a center circle. Points outside the cone defined by the two circles will be transparent. For simple radial gradients the focal point is adjusted to lie inside the center circle, whereas the focal point can have any position in an extended radial gradient.

Outside the end 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 QRadialGradient class provides the center(), focalPoint() and radius() functions returning the gradient's center, focal point and radius respectively.

See also QLinearGradient, QConicalGradient, and The Gradients Demo.

Constructor & Destructor Documentation

QtGui.QRadialGradient.QRadialGradient ( System.Type  dummy)
protected
QtGui.QRadialGradient.QRadialGradient ( )

Constructs a simple radial gradient with the center and focal point at (0, 0) with a radius of 1.

QtGui.QRadialGradient.QRadialGradient ( QRadialGradient  copy)
QtGui.QRadialGradient.QRadialGradient ( QPointF  center,
double  radius 
)

Constructs a simple radial gradient with the given center, radius and the focal point in the circle center.

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

QtGui.QRadialGradient.QRadialGradient ( QPointF  center,
double  radius,
QPointF  focalPoint 
)

Constructs a simple radial gradient with the given center, radius and focalPoint.

Note: If the given focal point is outside the circle defined by the center point and radius, it will be re-adjusted to lie at a point on the circle where it intersects with the line from center to focalPoint.

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

QtGui.QRadialGradient.QRadialGradient ( QPointF  center,
double  centerRadius,
QPointF  focalPoint,
double  focalRadius 
)

Constructs an extended radial gradient with the given center, centerRadius, focalPoint, and focalRadius.

This function was introduced in Qt 4.8.

QtGui.QRadialGradient.QRadialGradient ( double  cx,
double  cy,
double  radius 
)

Constructs a simple radial gradient with the center at (cx, cy) and the specified radius. The focal point lies at the center of the circle.

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

QtGui.QRadialGradient.QRadialGradient ( double  cx,
double  cy,
double  radius,
double  fx,
double  fy 
)

Constructs a simple radial gradient with the given center (cx, cy), radius and focal point (fx, fy).

Note: If the given focal point is outside the circle defined by the center (cx, cy) and the radius it will be re-adjusted to the intersection between the line from the center to the focal point and the circle.

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

QtGui.QRadialGradient.QRadialGradient ( double  cx,
double  cy,
double  centerRadius,
double  fx,
double  fy,
double  focalRadius 
)

Constructs an extended radial gradient with the given center (cx, cy), center radius, centerRadius, focal point, (fx, fy), and focal radius focalRadius.

This function was introduced in Qt 4.8.

Member Function Documentation

override void QtGui.QRadialGradient.CreateProxy ( )
virtual

Reimplemented from QtGui.QGradient.

new void QtGui.QRadialGradient.Dispose ( )
new void QtGui.QRadialGradient.SetCenter ( double  x,
double  y 
)

This is an overloaded function.

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

This function was introduced in Qt 4.2.

See also center().

new void QtGui.QRadialGradient.SetFocalPoint ( double  x,
double  y 
)

This is an overloaded function.

Sets the focal point of this radial gradient in logical coordinates to (x, y).

This function was introduced in Qt 4.2.

See also focalPoint().

Property Documentation

QPointF QtGui.QRadialGradient.Center
getset

Returns the center of this radial gradient in logical coordinates.

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

This function was introduced in Qt 4.2.

double QtGui.QRadialGradient.CenterRadius
getset

Returns the center radius of this radial gradient in logical coordinates.

This function was introduced in Qt 4.8.

Sets the center radius of this radial gradient in logical coordinates to radius

This function was introduced in Qt 4.8.

QPointF QtGui.QRadialGradient.FocalPoint
getset

Returns the focal point of this radial gradient in logical coordinates.

Sets the focal point of this radial gradient in logical coordinates to focalPoint.

This function was introduced in Qt 4.2.

double QtGui.QRadialGradient.FocalRadius
getset

Returns the focal radius of this radial gradient in logical coordinates.

This function was introduced in Qt 4.8.

Sets the focal radius of this radial gradient in logical coordinates to radius

This function was introduced in Qt 4.8.

double QtGui.QRadialGradient.Radius
getset

Returns the radius of this radial gradient in logical coordinates.

Equivalent to centerRadius()

Sets the radius of this radial gradient in logical coordinates to radius

Equivalent to setCenterRadius()

This function was introduced in Qt 4.2.