<AWT Dev> <AWT dev>[10] Review request for JDK-8190767: [macos] if JFrame is maximized on OS X, all new JFrames will be maximized by default

Sergey Bylokhov Sergey.Bylokhov at oracle.com
Tue Feb 20 19:31:20 UTC 2018

Hi, Manajit.
You cannot cast the target to a Frame without any checks, because it is 
not necessary a Frame.

On 16/02/2018 03:48, Manajit Halder wrote:
> Hi Sergey,
> Please review the modified fix. The current webrev maintains the window 
> behaviour after it is shown as per the current implementation.
> canFullScreen is set true in case the window is resizable.
> http://cr.openjdk.java.net/~mhalder/8190767/webrev.02/
> Regards,
> Manajit
>> On 14-Feb-2018, at 8:29 AM, Sergey Bylokhov 
>> <sergey.bylokhov at oracle.com <mailto:sergey.bylokhov at oracle.com>> wrote:
>> Hi, Manajit.>http://cr.openjdk.java.net/~mhalder/8190767/webrev.01/
>> After the window is shown behavior should be the same as in current 
>> implementation(resizable windows should have canFullScreen=true, 
>> others canFullScreen=false) so you cannot just set it to "true" or 
>> "false".
>>> The issue is not reproducible in jdk8. >
>>> Regards,
>>> Manajit
>>>> On 31-Jan-2018, at 2:40 AM, Sergey Bylokhov 
>>>> <sergey.bylokhov at oracle.com <mailto:sergey.bylokhov at oracle.com> 
>>>> <mailto:sergey.bylokhov at oracle.com>> wrote:
>>>> Hi, Manajit.
>>>> Did you check that it works properly in jdk8?
>>>> I guess we need to set "WINDOW_FULLSCREENABLE" after we show the 
>>>> window for the first time, with one exception if the window is 
>>>> On 29/01/2018 04:39, Manajit Halder wrote:
>>>>> Hi All,
>>>>> Kindly review the fix for JDK10.
>>>>> Bug:
>>>>> https://bugs.openjdk.java.net/browse/JDK-8190767
>>>>> Webrev:
>>>>> http://cr.openjdk.java.net/~mhalder/8190767/webrev.00/
>>>>> Problem:
>>>>> In this problem two unrelated windows are created (first window and 
>>>>> second window). If the second window is created when the first 
>>>>> window is in fullscreen then the second window will automatically 
>>>>> be created in fullscreen mode. This is the default behaviour with 
>>>>> Cocoa windows. The second window receives windowWillEnterFullScreen 
>>>>> notification when the first window is in fullscreen. 
>>>>> windowWillEnterFullScreen notification is system generated 
>>>>> notification and there is no way to prevent it.
>>>>> Above conclusion was made after debugging the issue to find out if 
>>>>> there is any way to prevent the windowWillEnterFullScreen 
>>>>> notification and also to find out if it generated due to some 
>>>>> existing java (generic and native) code.
>>>>> I wrote a simple Mac OS X application with 2 windows and observed 
>>>>> the same behaviour. The second window is created in fullscreen mode 
>>>>> if it is created when the first window is in fullscreen. Whereas 
>>>>> the second window is displayed normal if the first window is in 
>>>>> normal mode (not in fullscreen mode). The only way found to prevent 
>>>>> the second window going to fullscreen is don’t set this behaviour 
>>>>> for the second window.
>>>>> Fix:
>>>>> The behaviour is normal on Mac OS. But if we want to prevent the 
>>>>> second (all windows except the primary window) window to 
>>>>> automatically created in fullscreen mode then the following fix can 
>>>>> be applicable.
>>>>> By default all the Frames are set the WINDOW_FULLSCREENABLE 
>>>>> property and by default all frames receives fullscreen event if the 
>>>>> first frame is in fullscreen when it is created. Due to this 
>>>>> setting the second frame which is created on button click goes to 
>>>>> fullscreen on creation automatically. Mac OS fullscreen event 
>>>>> notifications are received in case the first frame is in fullscreen 
>>>>> and WINDOW_FULLSCREENABLE set for the second frame.
>>>>> Only the first frame should have the WINDOW_FULLSCREENABLE property 
>>>>> set. The frames created in this case were ownerless windows as 
>>>>> mentioned earlier. Therefore it is not possible to find out the 
>>>>> owner of the current frame, it is null for all the frames created. 
>>>>> Hence the fix is if the current frame is the first frame then set 
>>>>> the property otherwise don’t set the property WINDOW_FULLSCREENABLE.
>>>>> Regards,
>>>>> Manajit
>>>> --
>>>> Best regards, Sergey.
>> --
>> Best regards, Sergey.

Best regards, Sergey.

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