<AWT Dev> <Swing Dev> [10] Review request for 8182043: Access to Windows Large Icons

Semyon Sadetsky semyon.sadetsky at oracle.com
Thu Sep 21 15:54:40 UTC 2017

On 09/20/2017 02:41 PM, Sergey Bylokhov wrote:

> Hi, Semyon
> I have some initial comments which are based on the two bugs: 
> JDK-8182043 and JDK-8156183.
> getSystemIcon(File file, int size):
>     - How the user will know what values/sizes should be passed, what 
> values are supported? It is unlikely that he will pass all values in 
> between 8-256?
Supported sizes are described in the method spec, aren't they?
This API doesn't imply any size limitation like the 8-256 you mentioned.
> "For any positive size value the exact file icon size is queried":
>     - This should be double checked because our implementation can 
> return MultiResolutionIconImage if the system returns the icon which 
> size is different from requested.
>     - What these parameters mean? Is it the smallest(biggest) 
> supported size or is it a default size? Can it be different if 
> different dpi are used on the screen? For example 16(32) by default 
> and 32(64) on HiDPI?
They means what they have been meaning FileChooserUI implementation for 
the Windows L&F which operates by two fixed icon sizes, large and small.
>    - It seems that this value duplicate functionality of the old 
> getSystemIcon(File) method?
How this can be got from the spec? It may return the same size but not 
> Probably it will be better to provide to the user the 
> set(list/mri/array/etc) of supported images, or if it is really slow 
> the set(list/mri/array/etc) of supported sizes, and the user will be 
> able to pass some meaningful sizes.
This is not a good idea. Extracting all available icon resolutions might 
take significant time and since icons are cached it would be waste of RAM.
> On 9/13/17 11:01, Semyon Sadetsky wrote:
>> Hello,
>> Please review fix for JDK10 (the changes involve AWT and Swing):
>> bug: https://bugs.openjdk.java.net/browse/JDK-8182043
>> webrev: http://cr.openjdk.java.net/~ssadetsky/8182043/webrev.00/
>> The fix  opens the part of the ShellFolder API for getting system 
>> icons which was decided to be left closed during the 8081722 
>> enhancement review in 9.
>> Also the fix extends the API by adding possibility to query file 
>> icons of arbitrary size and implements this extension for Windows 
>> platform.
>> --Semyon

More information about the awt-dev mailing list