On Fri, 2 Dec 2022 13:10:37 GMT, Ambarish Rapte <[email protected]> wrote:

>> Karthik P K has updated the pull request incrementally with one additional 
>> commit since the last revision:
>> 
>>   Address review comments
>
> modules/javafx.controls/src/main/java/javafx/scene/control/skin/SliderSkin.java
>  line 346:
> 
>> 344:         thumb.getStyleClass().setAll("thumb");
>> 345:         thumb.setAccessibleRole(AccessibleRole.THUMB);
>> 346:         dragStart = new Point2D(thumb.getLayoutX(), thumb.getLayoutY());
> 
> `dragStart` should be the exact mouse position where mouse pressed has 
> occurred.
> With this change mouse gets moved to the layout X, Y position of thumb, even 
> though the mouse press occurred at any other location inside the thumb.

This change makes sure that `dragStart` is not null when `setOnMouseDragged 
`event handler is called.
As suggested in the issue, I tried to initialize `dragStart` in 
`layoutChildren` method but it was causing side effects.
I checked for other event handlers such as `onDragDetected` and 
`onMouseDragEntered`, but none of these event handlers were invoked. Looks like 
these events are also consumed by tooltip similar to how it consumes 
`setOnMousePressed`.
I haven't seen above mentioned side effect while checking the fix. I will check 
again.

-------------

PR: https://git.openjdk.org/jfx/pull/965

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