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

Anton V. Tarasov anton.tarasov at oracle.com
Fri Jan 13 07:49:59 PST 2012

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.

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