IUIAnimationVariableIntegerChangeHandler::OnIntegerValueChanged method (uianimation.h)

Handles events that occur when the value of an animation variable changes.

This method receives updates as INT32 values. To receive updates as DOUBLE values, use the IUIAnimationVariableChangeHandler::OnValueChanged method.

Syntax

HRESULT OnIntegerValueChanged(
  IUIAnimationStoryboard *storyboard,
  IUIAnimationVariable   *variable,
  INT32                  newValue,
  INT32                  previousValue
);

Parameters

storyboard

The storyboard that is animating the animation variable specified by the variable parameter.

variable

The animation variable that has been updated.

newValue

The new value of the animation variable, rounded according to the variable's rounding mode.

previousValue

The previous value of the animation variable, rounded according to the variable's rounding mode.

Return value

If the method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code. See Windows Animation Error Codes for a list of error codes.

Remarks

The rounding mode for an animation variable is specified using the IUIAnimationVariable::SetRoundingMode method.

OnIntegerValueChanged events might occur less frequently than OnValueChanged events because values such as 2.2, 2.3, 2.4 would all be rounded to the same integer.

By default, a call made in a callback method to any other animation method results in the call failing and returning UI_E_ILLEGAL_REENTRANCY. However, there are exceptions to this default. The following methods can be successfully called from OnIntegerValueChanged:

Requirements

   
Minimum supported client Windows 7, Windows Vista and Platform Update for Windows Vista [desktop apps | UWP apps]
Minimum supported server None supported
Target Platform Windows
Header uianimation.h
DLL UIAnimation.dll

See also

IUIAnimationVariable::GetIntegerValue

IUIAnimationVariable::GetPreviousIntegerValue

IUIAnimationVariable::SetRoundingMode

IUIAnimationVariable::SetVariableIntegerChangeHandler

IUIAnimationVariableChangeHandler::OnValueChanged

IUIAnimationVariableIntegerChangeHandler

UI_ANIMATION_ROUNDING_MODE