<AWT Dev> [11] Review request for 8198605: Touch keyboard is shown for a non-focusable text component

anton.litvinov at oracle.com anton.litvinov at oracle.com
Fri Mar 2 15:27:01 UTC 2018

Hello Dmitry,

Thank you for review and partial approval of this fix. I think that 
there is no need to add checks for "Component.isDisplayable()", 
"Component.isVisible()" in this method, because:

1.  Practical test shows, that for enabled, editable, focusable but not 
visible text components the touch keyboard is not shown in JDK with the 
fix for the bug JDK-8166772.
2.  Showing of the touch keyboard implemented by the fix for JDK-8166772 
occurs as a result of handling "java.awt.event.MouseEvent" events on 
Java code level and not of handling "java.awt.event.FocusEvent". The 
events of type "MouseEvent" are not dispatched to not visible 
"java.awt.Component" instances according to the following code from the 
method "java.awt.Container.getMouseEventTargetImpl(int, int, boolean, 
EventTargetFilter, boolean, boolean"

     Component comp = component.get(i);
     if (comp != null && comp.visible &&

3.  I do not see, how the end user may touch or click enabled, editable, 
focusable, but not displayable text component. I do not think that there 
is need to cover such a case, unless a test case demonstrating showing 
of the touch keyboard for not displayable text component exists.

Will you approve this fix?

Thank you,

On 01/03/2018 22:04, Dmitry Markov wrote:
> Hi Anton,
> The fix looks good, but I wonder if we also shall check results of isDisplayable() and isVisible() before showing touch keyboard. My assumption is the following: we cannot transfer focus to non-displayable or invisible components, so it is unnecessary to display touch keyboard for such components too.
> Thanks,
> Dmitry
>> On 1 Mar 2018, at 16:30, anton.litvinov at oracle.com wrote:
>> Hello,
>> Could you please review the following fix for the bug.
>> Bug: https://bugs.openjdk.java.net/browse/JDK-8198605
>> Webrev: http://cr.openjdk.java.net/~alitvinov/8198605/jdk11/webrev.00
>> The fix extends a number of the required conditions in the method "sun.awt.windows.WToolkit.showOrHideTouchKeyboard(Component, AWTEvent)", which should be satisfied for showing of the touch keyboard, by checking if the component is focusable or not.
>> Thank you,
>> Anton

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