<AWT Dev> [7u4] Review request for 7145818: [macosx] dialogs not showing when JFrame is in full screen mode

Anthony Petrov anthony.petrov at oracle.com
Fri Mar 2 06:42:04 PST 2012

A tiny typo has been fixed, a new webrev is at:


best regards,

On 3/2/2012 6:20 PM, Anthony Petrov wrote:
> Thanks for your suggestions Mike. Here's the latest version of the fix:
> http://cr.openjdk.java.net/~anthony/x-21-popupInFullscreen-7145818.1/
> -- 
> best regards,
> Anthony
> On 3/2/2012 3:14 AM, Mike Swingler wrote:
>> On Mar 1, 2012, at 1:10 PM, Anthony Petrov wrote:
>>> Hi Mike,
>>> Thanks for the review! Please see my comments inline.
>>> On 3/1/2012 9:31 PM, Mike Swingler wrote:
>>>> On Feb 29, 2012, at 6:58 AM, Anthony Petrov wrote:
>>>>> http://cr.openjdk.java.net/~anthony/x-21-popupInFullscreen-7145818.0/
>>>> A few points to consider:
>>>> * To protect against the unrecognized selector problem, you should 
>>>> test if the AWTWindow object 
>>>> -respondsToSelector:@selector(toggleFullScreen) before just calling it.
>>> I'm aware of -respondsToSelector. But I suppose that in that case 
>>> this simply won't work on 10.6.8 at all. Since
>>> a) presently it does work on 10.6.8 for reasons unknown, and
>> If OpenJDK is built on Snow Leopard, it works fine. I believe the 
>> problem is the X11/FreeType versions in Lion are newer, and DYLD won't 
>> load libraries linked against older versions. But that is going to 
>> start me on my rant about how OpenJDK should bundle it's own FreeType...
>>> b) we officially support 10.7+ only, hence the check makes little 
>>> sense in theory, and
>> Please think of OpenJDK, not just Oracle's proprietary binaries. There 
>> are other users who currently compile on Snow Leopard and this is not 
>> an inconvenience, since 10.7-only API is very rare in the JDK.
>>> c) from ObjC perspective sending an unknown selector isn't an error, 
>>> but just a warning,
>> It is extremely poor form. The -respondsToSelector: check is very 
>> cheap, and is very obvious what it is guarding against.
>>> it seems to me that having this warning printed out to the console 
>>> (which isn't seen by 99% of users anyway) is OK when running on 
>>> 10.6.8. Plus we get the full screen working there. Isn't it awesome?
>> We know there are developers and users who will be running OpenJDK on 
>> Mac OS X 10.6.8, so it is perfectly reasonable to add this as an OS 
>> guard. We should not actively damage our ability to run on 10.6 if 
>> it's trivially avoidable.
>>>> * Also, there is already API that calls -toggleFullScreen in the 
>>>> eAWT classes that you might not be aware of. You should probably 
>>>> test for interactions with that, since apps can opt their window 
>>>> into having a full screen widget icon and independently toggle 
>>>> fullscreen.
>>> Thanks for pointing this out. I'll rework this code to make sure 
>>> calls from EAWT update the boolean flag.
>> Great.
>>>> * In some cases, seeing the menubar is actually desirable, where as 
>>>> in the "exclusive" mode, it's probably not. Perhaps you could 
>>>> consult a client property on the window to determine if the menu bar 
>>>> should be hidden?
>>> Excellent idea! I think that by default the menu should be hidden 
>>> (for Java spec's sake). But if a client property is set, then the 
>>> menu would be visible.
>> Cool. There are several client property readers already on the root 
>> AWT window that should be easily extendable.
>>>> I like this overall solution, because it uses the native platform 
>>>> concept of full screen which doesn't trap the user from switching 
>>>> spaces like the Java SE 6 implementation did.
>>> We've noticed an interesting detail with -toggleFullScreen when it's 
>>> used in a multi-screen environment. In that case the window will go 
>>> full screen on the biggest monitor (actually we have a MacBook with 
>>> an external monitor connected.) The OS seems to ignore the screen 
>>> where the window were before entering the FS mode (the main notebook 
>>> display). Is this OK? Can we force it to use the same screen where 
>>> the window is originally located for the FS mode?
>> It's actually the monitor with the menu bar (the primary, as 
>> designated in the Monitor's preference pane).
>> This is an issue with the OS, and should be filed at 
>> <http://bugreporter.apple.com> (it's known, but if you have a specific 
>> API suggestion to target a screen, or some sort of automatic behavior 
>> in mind, it would be good to provide specific suggestions in the bug).
>> Thanks,
>> Mike Swingler
>> Apple Inc.

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