Hi,
Please review the fix for JDK9,
Bug: https://bugs.openjdk.java.net/browse/JDK-8149636
Webrev: http://cr.openjdk.java.net/~arapte/8149636/webrev.00/
Issue:
While scrolling with selection, when mouse is dragged outside
the bounds of TextField,
a. TextField flickering is observed
b. TextField over scrolls on right. Text gets hidden on left side even
when no scroll is needed.
Cause:
a. Flicker -
For simulating scroll, scroll bar information is used.
To get correct scroll info, scroll bar should be visible.
Showing and hiding of scroll bar causes the flickering.
b. Over Scroll -
The scrolling logic scrolled the textField in units of half the si.nPage. i.e.
(si.inPage / 2) maximum till si.nMax,
Which causes the over scroll.
Fix:
ES_AUTOHSCROLL set for the TextField enables the automatic
horizontal scrolling, so we need not add code for scrolling.
Only selection should be updated as the mouse moves.
Hence removed the code to related to SendMessage( WM_HSCROLL,.)
i.e. scrolling
Verification:
Manually Verified that textField editing / selection / copy /
paste works fine.
No Jtreg, JCK tests related to TextField fail due to this
change.
Updated an existing test ScrollSelectionTest.java to test the
scenarios mentioned in the bug.
Thanks,
Ambarish
