KeySpline Class
This class is used by a spline key frame to define animation progress.
Assembly: PresentationCore (in PresentationCore.dll)
System.Windows.Threading::DispatcherObject
System.Windows::DependencyObject
System.Windows::Freezable
System.Windows.Media.Animation::KeySpline
| Name | Description | |
|---|---|---|
![]() | KeySpline() | Initializes a new instance of the KeySpline class. |
![]() | KeySpline(Double, Double, Double, Double) | Initializes a new instance of the KeySpline class with the specified coordinates for the control points. |
![]() | KeySpline(Point, Point) | Initializes a new instance of the KeySpline class with the specified control points. |
| Name | Description | |
|---|---|---|
![]() | CanFreeze | Gets a value that indicates whether the object can be made unmodifiable. (Inherited from Freezable.) |
![]() | ControlPoint1 | The first control point used to define a Bezier curve that describes a KeySpline. |
![]() | ControlPoint2 | The second control point used to define a Bezier curve that describes a KeySpline. |
![]() | DependencyObjectType | Gets the DependencyObjectType that wraps the CLR type of this instance. (Inherited from DependencyObject.) |
![]() | Dispatcher | Gets the Dispatcher this DispatcherObject is associated with. (Inherited from DispatcherObject.) |
![]() | IsFrozen | Gets a value that indicates whether the object is currently modifiable. (Inherited from Freezable.) |
![]() | IsSealed | Gets a value that indicates whether this instance is currently sealed (read-only).(Inherited from DependencyObject.) |
| Name | Description | |
|---|---|---|
![]() | CheckAccess() | Determines whether the calling thread has access to this DispatcherObject.(Inherited from DispatcherObject.) |
![]() | ClearValue(DependencyProperty^) | Clears the local value of a property. The property to be cleared is specified by a DependencyProperty identifier. (Inherited from DependencyObject.) |
![]() | ClearValue(DependencyPropertyKey^) | Clears the local value of a read-only property. The property to be cleared is specified by a DependencyPropertyKey. (Inherited from DependencyObject.) |
![]() | Clone() | |
![]() | CloneCore(Freezable^) | Makes this instance a deep copy of the specified KeySpline. 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.(Overrides Freezable::CloneCore(Freezable^).) |
![]() | CloneCurrentValue() | |
![]() | CloneCurrentValueCore(Freezable^) | Makes this instance a modifiable deep copy of the specified KeySpline using current property values. Resource references, data bindings, and animations are not copied, but their current values are.(Overrides Freezable::CloneCurrentValueCore(Freezable^).) |
![]() | CoerceValue(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.) |
![]() | CreateInstance() | |
![]() | CreateInstanceCore() | Creates a new instance of KeySpline.(Overrides Freezable::CreateInstanceCore().) |
![]() | Equals(Object^) | Determines whether a provided DependencyObject is equivalent to the current DependencyObject.(Inherited from DependencyObject.) |
![]() | Finalize() | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.) |
![]() | Freeze() | |
![]() | FreezeCore(Boolean) | |
![]() | GetAsFrozen() | |
![]() | GetAsFrozenCore(Freezable^) | Makes this instance a clone of the specified KeySpline object.(Overrides Freezable::GetAsFrozenCore(Freezable^).) |
![]() | GetCurrentValueAsFrozen() | |
![]() | GetCurrentValueAsFrozenCore(Freezable^) | Makes this instance a frozen clone of the specified KeySpline. Resource references, data bindings, and animations are not copied, but their current values are.(Overrides Freezable::GetCurrentValueAsFrozenCore(Freezable^).) |
![]() | GetHashCode() | Gets a hash code for this DependencyObject.(Inherited from DependencyObject.) |
![]() | GetLocalValueEnumerator() | Creates a specialized enumerator for determining which dependency properties have locally set values on this DependencyObject. (Inherited from DependencyObject.) |
![]() | GetSplineProgress(Double) | Calculates spline progress from a supplied linear progress. |
![]() | GetType() | |
![]() | GetValue(DependencyProperty^) | Returns the current effective value of a dependency property on this instance of a DependencyObject. (Inherited from DependencyObject.) |
![]() | InvalidateProperty(DependencyProperty^) | Re-evaluates the effective value for the specified dependency property(Inherited from DependencyObject.) |
![]() | MemberwiseClone() | |
![]() | OnChanged() | Called when the current KeySpline object is modified.(Overrides Freezable::OnChanged().) |
![]() | OnFreezablePropertyChanged(DependencyObject^, DependencyObject^) | Ensures that appropriate context pointers are established for a DependencyObjectType data member that has just been set.(Inherited from Freezable.) |
![]() | OnFreezablePropertyChanged(DependencyObject^, DependencyObject^, DependencyProperty^) | This member supports the Windows Presentation Foundation (WPF) infrastructure and is not intended to be used directly from your code.(Inherited from Freezable.) |
![]() | OnPropertyChanged(DependencyPropertyChangedEventArgs) | Overrides the DependencyObject implementation of OnPropertyChanged to also invoke any Changed handlers in response to a changing dependency property of type Freezable.(Inherited from Freezable.) |
![]() | ReadLocalValue(DependencyProperty^) | Returns the local value of a dependency property, if it exists. (Inherited from DependencyObject.) |
![]() | ReadPreamble() | |
![]() | SetCurrentValue(DependencyProperty^, Object^) | Sets the value of a dependency property without changing its value source. (Inherited from DependencyObject.) |
![]() | SetValue(DependencyProperty^, Object^) | Sets the local value of a dependency property, specified by its dependency property identifier. (Inherited from DependencyObject.) |
![]() | SetValue(DependencyPropertyKey^, Object^) | Sets the local value of a read-only dependency property, specified by the DependencyPropertyKey identifier of the dependency property. (Inherited from DependencyObject.) |
![]() | ShouldSerializeProperty(DependencyProperty^) | Returns a value that indicates whether serialization processes should serialize the value for the provided dependency property.(Inherited from DependencyObject.) |
![]() | ToString() | Creates a string representation of this instance of KeySpline based on the current culture. (Overrides Object::ToString().) |
![]() | ToString(IFormatProvider^) | Creates a string representation of this KeySpline based on the supplied IFormatProvider. |
![]() | VerifyAccess() | Enforces that the calling thread has access to this DispatcherObject.(Inherited from DispatcherObject.) |
![]() | WritePostscript() | |
![]() | WritePreamble() |
| Name | Description | |
|---|---|---|
![]() ![]() | IFormattable::ToString(String^, IFormatProvider^) | Formats the value of the current instance using the specified format. |
To understand how a KeySpline works, it is helpful to understand cubic Bezier curves. A cubic Bezier curve is defined by a start point, an end point, and two control points. The two coordinates in the KeySpline defines those two control points. When describing key splines, the start point of the Bezier curve is always 0, and the end point is always 1, which is why you define only the two control points. The resulting curve specifies how an animation is interpolated during a time segment; that is, the curve represents the rate of change in the animation's target attribute over the time segment. To better see the relationship between animation progress and a Bezier curve, see Key Spline Animation Sample.
<object property="cp1X,cp1Y cp2X,cp2Y"/>
- cp1X
X component of the curve's first control point. The value must be between 0 and 1.
- cp1Y
Y component of the curve's first control point. The value must be between 0 and 1.
- cp2X
X component of the curve's second control point. The value must be between 0 and 1.
- cp2Y
Y component of the curve's second control point. The value must be between 0 and 1.
The separator between values may be either comma or one or more spaces. The convention shown here of commas between components of a point and space between points is a recommended convention. Do not use a comma as the decimal point within the values of point components, even if that is the norm in your culture. XAML values are treated as en-us in all type conversion cases, and the comma is thus interpreted as the separator and not as the intended decimal point.
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.





