fdo#58995 fix focus gain/lost events dropping on JDK 1.7

With JDK upgrade to 1.7.x focus gain/lost events were dropped and thus not
discoverable by AT tools.

The problem has nothing to do with different packaging of JAB (2.0.3 is
included with JDK 1.7u6 and higher).

The reason for the event droping was a new check in
DefaultKeyboardFocusManager.java that was introduced in JDK 1.7.x:

@@ -294,18 +271,10 @@ public class DefaultKeyboardFocusManager
        extends KeyboardFocusManager {

-      if (!(newFocusedWindow.isFocusableWindow()
-               && newFocusedWindow.isVisible()
-               && newFocusedWindow.isDisplayable()))
-         {
-             // we can not accept focus on such window, so reject it.
-             restoreFocus(we);
-             break;
-         }

With this check in place it is assumed that Component.isDisplayable() must
return true, for event to be dispatched. But particularly
`Dialog.isDisplayable()` didn't and thus all tab key events (focus traversal)
were dropped.

Many thanks to Jamie and Stuart for helping out with reproducing and tracking that down!

Change-Id: I4876773199ca06a6e73213401692e8275a1f3b22
Reviewed-on: https://gerrit.libreoffice.org/4560
Reviewed-by: Michael Meeks <michael.meeks@suse.com>
Tested-by: Michael Meeks <michael.meeks@suse.com>

0 files changed, 0 insertions, 0 deletions