Review request for 7124430: [macosx] LWCToolkit.grab() and LWCToolkit.ungrab() events are not implemented yet

[Mike Swingler]

Don't worry about trying to catch the window title bar frame, you really can't, and you shouldn't try. The titlebar/toolbar area is specially marked so that the WindowServer will still allow the window to be movable, even if the app is spinning and non-responsive. Due to this fact, the app is infrequently notified when it's window is being moved, because that app isn't even involved.

Regards,
Mike Swingler
Apple Inc.

On Jan 13, 2012, at 7:49 AM, Anton V. Tarasov wrote:

> Hi Anthony,
> 
> Thanks for the tip. Though I did look through some forum discussions where people asked question
> "is it possible to catch a mouse down event in a frame's titlebar?" The answer was "not a direct way".
> Commonly, a suggestion is to workaround it by means of -windowWillMove usage, but this looks quite
> odd to me...
> 
> For instance:
> 
> http://www.cocoabuilder.com/archive/cocoa/6725-catching-mousedown-in-an-nswindow-titlebar.html
> 
> "PS: I have tried to overiding -sendEvent in the instance of a subclass
> of NSApplication object to see what events are going thru, mouseDown
> and mouseUp events in the titlebar don't go thru. It's seem that the
> windows are moved directly by the WindowServer, as you explained me."
> 
> Did you have an experience of trying it yourself?
> 
> Thanks,
> Anton.
> 
> On 1/13/12 4:58 PM, Anthony Petrov wrote:
>> Hi Anton,
>> 
>> You want to override NSWindow -sendEvent: in order to catch clicks on the titlebar of windows on the Mac.
>> 
>> -- 
>> best regards,
>> Anthony
>> 
>> On 1/13/2012 6:36 PM, Anton V. Tarasov wrote:
>>> Hello,
>>> 
>>> Please review a fix for 7124430.
>>> 
>>> webrev: http://cr.openjdk.java.net/~ant/7124430/webrev.1/
>>> 
>>> UngrabEvent dispatching is implemented according to the cases mentioned
>>> in the UngrabEvent class description, except for the case of clicking
>>> in an owner frame's title. The latter, as I found, can't be implemented
>>> on Mac OS X platform. Along with the implementation, a regression test
>>> is proposed.
>>> 
>>> Thanks,
>>> Anton.
>>> 
>>> 
>