<AWT Dev> <Awt Dev> [9] Review Request for 8022057: JFileChooser blocks EDT in Win32ShellFolder2.getIcon

Semyon Sadetsky semyon.sadetsky at oracle.com
Tue Jun 2 14:57:32 UTC 2015

Hi Sergey,

I will update this library detection when the preceding fix (about 
columns) is approved.


On 6/2/2015 5:14 PM, Sergey Bylokhov wrote:
> Hi, Semyon.
> Same question about Library here. Does this text is used in all locales?
> On 01.06.15 17:41, Anton V. Tarasov wrote:
>> Hi Semyon,
>> The idea of the fix looks ok to me.
>> On 28.05.2015 9:44, Semyon Sadetsky wrote:
>>> Hello,
>>> Please review fix for JDK9:
>>> bug: https://bugs.openjdk.java.net/browse/JDK-8022057
>>> webrev: http://cr.openjdk.java.net/~ssadetsky/8022057/webrev.00/
>>> The full story can be found in the jira's comments and NetBeans 
>>> tracker (https://netbeans.org/bugzilla/show_bug.cgi?id=188001).
>>> It seems the bug proposes to change the design of the AWT shell 
>>> support on Windows platform. But instead I tried to eliminate the 
>>> user experience issue it can be a good step to improve the situation.
>>> The user experience issue is the JFileChooser spontaneous delays 
>>> caused by getIcon(): I could not reproduce this under Win7 and 
>>> jdk8/9. But I found in MSDN that ExtractIcon Win32 API call can take 
>>> significant amount of time in some cases. Mostly when the file is an 
>>> executable or a link and its icon is not cached yet.
>>> MS propose a way how to avoid that: use asynchronous flag GIL_ASYNC 
>>> with GetIconLocation call which then may return E_PENDING which 
>>> means consequent ExtractIcon call can take time. There are several 
>>> ways to handle E_PENDING return I propose just to use the default 
>>> icon for the file which can be obtained with GIL_DEFAULTICON flag 
>>> and should be much faster. Since I cannot reproduce the issue I 
>>> don't know how effective it will be.
>> But did you simply try to load with GIL_DEFAULTICON for a sanity 
>> check? Is it really much faster?
>> Regards,
>> Anton.
>>> Also in the fix I added possibility to get Windows-Libraries icons, 
>>> which were not available before in the JFileChooser.
>>> --Semyon

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