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RadialGradientBrush Class

 

Paints an area with a radial gradient. A focal point defines the beginning of the gradient, and a circle defines the end point of the gradient.

Namespace:   System.Windows.Media
Assembly:  PresentationCore (in PresentationCore.dll)

System.Object
  System.Windows.Threading.DispatcherObject
    System.Windows.DependencyObject
      System.Windows.Freezable
        System.Windows.Media.Animation.Animatable
          System.Windows.Media.Brush
            System.Windows.Media.GradientBrush
              System.Windows.Media.RadialGradientBrush

Public NotInheritable Class RadialGradientBrush
	Inherits GradientBrush

NameDescription
System_CAPS_pubmethodRadialGradientBrush()

Initializes a new instance of the RadialGradientBrush class.

System_CAPS_pubmethodRadialGradientBrush(Color, Color)

Initializes a new instance of the RadialGradientBrush class with the specified start and stop colors.

System_CAPS_pubmethodRadialGradientBrush(GradientStopCollection)

Initializes a new instance of the RadialGradientBrush class that has the specified gradient stops.

NameDescription
System_CAPS_pubpropertyCanFreeze

Gets a value that indicates whether the object can be made unmodifiable. (Inherited from Freezable.)

System_CAPS_pubpropertyCenter

Gets or sets the center of the outermost circle of the radial gradient.

System_CAPS_pubpropertyColorInterpolationMode

Gets or sets a ColorInterpolationMode enumeration that specifies how the gradient's colors are interpolated. (Inherited from GradientBrush.)

System_CAPS_pubpropertyDependencyObjectType

Gets the DependencyObjectType that wraps the CLR type of this instance. (Inherited from DependencyObject.)

System_CAPS_pubpropertyDispatcher

Gets the Dispatcher this DispatcherObject is associated with. (Inherited from DispatcherObject.)

System_CAPS_pubpropertyGradientOrigin

Gets or sets the location of the two-dimensional focal point that defines the beginning of the gradient.

System_CAPS_pubpropertyGradientStops

Gets or sets the brush's gradient stops. (Inherited from GradientBrush.)

System_CAPS_pubpropertyHasAnimatedProperties

Gets a value that indicates whether one or more AnimationClock objects is associated with any of this object's dependency properties.(Inherited from Animatable.)

System_CAPS_pubpropertyIsFrozen

Gets a value that indicates whether the object is currently modifiable. (Inherited from Freezable.)

System_CAPS_pubpropertyIsSealed

Gets a value that indicates whether this instance is currently sealed (read-only).(Inherited from DependencyObject.)

System_CAPS_pubpropertyMappingMode

Gets or sets a BrushMappingMode enumeration that specifies whether the gradient brush's positioning coordinates are absolute or relative to the output area. (Inherited from GradientBrush.)

System_CAPS_pubpropertyOpacity

Gets or sets the degree of opacity of a Brush. (Inherited from Brush.)

System_CAPS_pubpropertyRadiusX

Gets or sets the horizontal radius of the outermost circle of the radial gradient.

System_CAPS_pubpropertyRadiusY

Gets or sets the vertical radius of the outermost circle of a radial gradient.

System_CAPS_pubpropertyRelativeTransform

Gets or sets the transformation that is applied to the brush using relative coordinates. (Inherited from Brush.)

System_CAPS_pubpropertySpreadMethod

Gets or sets the type of spread method that specifies how to draw a gradient that starts or ends inside the bounds of the object to be painted. (Inherited from GradientBrush.)

System_CAPS_pubpropertyTransform

Gets or sets the transformation that is applied to the brush. This transformation is applied after the brush's output has been mapped and positioned. (Inherited from Brush.)

NameDescription
System_CAPS_pubmethodApplyAnimationClock(DependencyProperty, AnimationClock)

Applies an AnimationClock to the specified DependencyProperty. If the property is already animated, the SnapshotAndReplace handoff behavior is used.(Inherited from Animatable.)

System_CAPS_pubmethodApplyAnimationClock(DependencyProperty, AnimationClock, HandoffBehavior)

Applies an AnimationClock to the specified DependencyProperty. If the property is already animated, the specified HandoffBehavior is used.(Inherited from Animatable.)

System_CAPS_pubmethodBeginAnimation(DependencyProperty, AnimationTimeline)

Applies an animation to the specified DependencyProperty. The animation is started when the next frame is rendered. If the specified property is already animated, the SnapshotAndReplace handoff behavior is used.(Inherited from Animatable.)

System_CAPS_pubmethodBeginAnimation(DependencyProperty, AnimationTimeline, HandoffBehavior)

Applies an animation to the specified DependencyProperty. The animation is started when the next frame is rendered. If the specified property is already animated, the specified HandoffBehavior is used. (Inherited from Animatable.)

System_CAPS_pubmethodCheckAccess()

Determines whether the calling thread has access to this DispatcherObject.(Inherited from DispatcherObject.)

System_CAPS_pubmethodClearValue(DependencyProperty)

Clears the local value of a property. The property to be cleared is specified by a DependencyProperty identifier. (Inherited from DependencyObject.)

System_CAPS_pubmethodClearValue(DependencyPropertyKey)

Clears the local value of a read-only property. The property to be cleared is specified by a DependencyPropertyKey. (Inherited from DependencyObject.)

System_CAPS_pubmethodClone()

Creates a modifiable clone of this RadialGradientBrush, making deep copies of this object's values. When copying dependency properties, this method copies resource references and data bindings (but they might no longer resolve) but not animations or their current values.

System_CAPS_pubmethodCloneCurrentValue()

Creates a modifiable clone of this RadialGradientBrush object, making deep copies of this object's current values. Resource references, data bindings, and animations are not copied, but their current values are.

System_CAPS_pubmethodCoerceValue(DependencyProperty)

Coerces the value of the specified dependency property. This is accomplished by invoking any CoerceValueCallback function specified in property metadata for the dependency property as it exists on the calling DependencyObject.(Inherited from DependencyObject.)

System_CAPS_pubmethodEquals(Object)

Determines whether a provided DependencyObject is equivalent to the current DependencyObject.(Inherited from DependencyObject.)

System_CAPS_pubmethodFreeze()

Makes the current object unmodifiable and sets its IsFrozen property to true. (Inherited from Freezable.)

System_CAPS_pubmethodGetAnimationBaseValue(DependencyProperty)

Returns the non-animated value of the specified DependencyProperty.(Inherited from Animatable.)

System_CAPS_pubmethodGetAsFrozen()

Creates a frozen copy of the Freezable, using base (non-animated) property values. Because the copy is frozen, any frozen sub-objects are copied by reference. (Inherited from Freezable.)

System_CAPS_pubmethodGetCurrentValueAsFrozen()

Creates a frozen copy of the Freezable using current property values. Because the copy is frozen, any frozen sub-objects are copied by reference.(Inherited from Freezable.)

System_CAPS_pubmethodGetHashCode()

Gets a hash code for this DependencyObject.(Inherited from DependencyObject.)

System_CAPS_pubmethodGetLocalValueEnumerator()

Creates a specialized enumerator for determining which dependency properties have locally set values on this DependencyObject. (Inherited from DependencyObject.)

System_CAPS_pubmethodGetType()

Gets the Type of the current instance.(Inherited from Object.)

System_CAPS_pubmethodGetValue(DependencyProperty)

Returns the current effective value of a dependency property on this instance of a DependencyObject. (Inherited from DependencyObject.)

System_CAPS_pubmethodInvalidateProperty(DependencyProperty)

Re-evaluates the effective value for the specified dependency property(Inherited from DependencyObject.)

System_CAPS_pubmethodReadLocalValue(DependencyProperty)

Returns the local value of a dependency property, if it exists. (Inherited from DependencyObject.)

System_CAPS_pubmethodSetCurrentValue(DependencyProperty, Object)

Sets the value of a dependency property without changing its value source. (Inherited from DependencyObject.)

System_CAPS_pubmethodSetValue(DependencyProperty, Object)

Sets the local value of a dependency property, specified by its dependency property identifier. (Inherited from DependencyObject.)

System_CAPS_pubmethodSetValue(DependencyPropertyKey, Object)

Sets the local value of a read-only dependency property, specified by the DependencyPropertyKey identifier of the dependency property. (Inherited from DependencyObject.)

System_CAPS_protmethodShouldSerializeProperty(DependencyProperty)

Returns a value that indicates whether serialization processes should serialize the value for the provided dependency property.(Inherited from DependencyObject.)

System_CAPS_pubmethodToString()

Return string representation of this Brush. (Inherited from Brush.)

System_CAPS_pubmethodToString(IFormatProvider)

Creates a string representation of this object based on the specified culture-specific formatting information. (Inherited from Brush.)

System_CAPS_pubmethodVerifyAccess()

Enforces that the calling thread has access to this DispatcherObject.(Inherited from DispatcherObject.)

NameDescription
System_CAPS_pubfieldSystem_CAPS_staticCenterProperty

Identifies the Center dependency property.

System_CAPS_pubfieldSystem_CAPS_staticGradientOriginProperty

Identifies the GradientOrigin dependency property.

System_CAPS_pubfieldSystem_CAPS_staticRadiusXProperty

Identifies the RadiusX dependency property.

System_CAPS_pubfieldSystem_CAPS_staticRadiusYProperty

Identifies the RadiusY dependency property.

NameDescription
System_CAPS_pubeventChanged

Occurs when the Freezable or an object it contains is modified. (Inherited from Freezable.)

NameDescription
System_CAPS_pubinterfaceSystem_CAPS_privmethodIFormattable.ToString(String, IFormatProvider)

Formats the value of the current instance using the specified format.(Inherited from Brush.)

The RadialGradientBrush is similar in programming model to the LinearGradientBrush. However, the linear gradient has a start and an end point to define the gradient vector, while the radial gradient has a circle, along with a focal point, to define the gradient behavior. The circle defines the end point of the gradient. In other words, a gradient stop at 1.0 defines the color at the circle's circumference. The focal point defines the center of the gradient. A gradient stop at 0.0 defines the color at the focal point.

The following image shows a rectangle filled with a radial gradient. The radial gradient that goes from white to gray. The outside circle represents the gradient circle while the red dot denotes the focal point. This gradient has its SpreadMethod set to Pad.

A radial gradient with highlighted components

Radial gradient with a highlighted focal point

System_CAPS_noteNote

RadialGradientBrush objects are rendered using hardware acceleration on Tier 2 systems. For more information about hardware tiers, see Graphics Rendering Tiers.

Because it inherits from the Freezable class, the RadialGradientBrush class provides several special features: RadialGradientBrush objects can be declared as , shared among multiple objects, made read-only to improve performance, cloned, and made thread safe. For more information about the different features provided by Freezable objects, see Freezable Objects Overview.

.NET Framework
Available since 3.0
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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