Mihai Chira created FLEX-34340:
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Summary: NumericStepper still responds to mouse wheel after being
removed from stage
Key: FLEX-34340
URL: https://issues.apache.org/jira/browse/FLEX-34340
Project: Apache Flex
Issue Type: Bug
Components: Spark: NumericStepper
Affects Versions: Apache Flex 4.12.0
Reporter: Mihai Chira
*Steps to reproduce*:
0. Import and run the attached project.
1. Click on the numeric stepper.
2. Roll the mouse wheel. Notice label changing as expected.
3. Shift+Click on the numeric stepper and wait for it to be removed from stage.
4. Roll the mouse wheel. Notice label changing, although the component is not
on stage anymore.
5. Wait 2 seconds for stepper to be 'dismantled'.
6. Roll the mouse wheel
*Actual behaviour*: at step 4 the NumericStepper still reacts to mouse wheel
events. Also, at step 6, the RTE below is thrown.
*Desired behaviour*: at step 4 the NumericStepper does not react to the mouse
wheel anymore, and at step 6 no error is thrown.
*NOTE*: After step 4, rolling the mouse wheel after clicking anywhere on stage
works as expected.
*RTE at step 6*:
Main Thread (Suspended: TypeError: Error #1009: Cannot access a property or
method of a null object reference.)
spark.components::NumericStepper/applyDisplayFormatFunction
spark.components::NumericStepper/setValue
spark.components::Spinner/system_mouseWheelHandler
_NumericStepper/system_mouseWheelHandler
flash.events::EventDispatcher/dispatchEventFunction [no source]
flash.events::EventDispatcher/dispatchEvent [no source]
mx.core::UIComponent/dispatchEvent
mx.managers::SystemManager/mouseEventHandler
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