CAnimationVariableChangeHandler Class
Implements a callback, which is called by the Animation API when the value of an animation variable changes.
Syntax
class CAnimationVariableChangeHandler : public CUIAnimationVariableChangeHandlerBase<CAnimationVariableChangeHandler>;
Members
Public Constructors
| Name | Description |
|---|---|
CAnimationVariableChangeHandler::CAnimationVariableChangeHandler |
Constructs a CAnimationVariableChangeHandler object. |
Public Methods
| Name | Description |
|---|---|
CAnimationVariableChangeHandler::CreateInstance |
Creates an instance of CAnimationVariableChangeHandler object. |
| CAnimationVariableChangeHandler::OnValueChanged | Called when a value of an animation variable has changed. (Overrides CUIAnimationVariableChangeHandlerBase::OnValueChanged.) |
| CAnimationVariableChangeHandler::SetAnimationController | Stores a pointer to animation controller to route events. |
Remarks
This event handler is created and passed to IUIAnimationVariable::SetVariableChangeHandler method, when you call CAnimationVariable::EnableValueChangedEvent or CAnimationBaseObject::EnableValueChangedEvent (which enables this event for all animation variables encapsulated in an animation object).
Inheritance Hierarchy
CUIAnimationCallbackBase
CUIAnimationVariableChangeHandlerBase
CAnimationVariableChangeHandler
Requirements
Header: afxanimationcontroller.h
CAnimationVariableChangeHandler::OnValueChanged
Called when a value of an animation variable has changed.
IFACEMETHOD(OnValueChanged) (
__in IUIAnimationStoryboard* storyboard,
__in IUIAnimationVariable* variable,
__in DOUBLE newValue,
__in DOUBLE previousValue);
Parameters
storyboard
The storyboard that is animating the variable.
variable
The animation variable that was updated.
newValue
The new value.
previousValue
The previous value.
Return Value
If the method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.
CAnimationVariableChangeHandler::SetAnimationController
Stores a pointer to animation controller to route events.
void SetAnimationController(CAnimationController* pAnimationController);
Parameters
pAnimationController
A pointer to animation controller, which will receive events.