<AWT Dev> [11] JDK-8195738: scroll poistion in ScrollPane is reset after calling validate()

[Shashidhara Veerabhadraiah]

Hi All, Please review a code fix for the below bug.

 

Bug: https://bugs.openjdk.java.net/browse/JDK-8195738

 

Webrev: http://cr.openjdk.java.net/~sveerabhadra/8195738/webrev.00/

 

Problematic platform: Windows only.

 

Summary: This bug occurs only on windows platform and whereas the behavior is different on Mac/Linux platforms. Now after this fix there is common behavior across the platforms.

The main problem was with resetting the state of the scroll bars even though the scroll bar panes are spawned with SCROLLBARS_NEVER as the scroll bar display policy. This resetting should not occur as the scroll bar display policy makes the 

scroll bar panes invisible. Hence except the setScrollPosition() calls, we don't need to resize/update the scroll bars state upon calling the scroll bars validation if SCROLLBARS_NEVER policy is used as the scroll bars are not displayed.

 

Thanks and regards,
Shashi
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