Disabled Icon Viewer Snippet

[killingerm]

This draft includes Snippet384 to inspect the behavior of the current icon-disabling algorithms implemented in the constructor of org.eclipse.swt.graphics.Image(Device, Image, int) when called with the SWT.IMAGE_DISABLE flag.

Currently, there are two different algorithms depending on whether Windows/MacOS or Linux is used. The Windows/MacOS implementation is outdated, and the generated disabled icons often look unappealing.

The snippet includes two new algorithms that can serve as a foundation for deriving a new algorithm, with adjustable parameters. This unified approach could also be applied to the Eclipse icons provided in disabled state, ensuring consistent appearance across all disabled icons, whether included in Eclipse JARs or generated dynamically using the Image constructor.

How to Use

1. Select a folder containing images.
2. Adjust the sliders to modify the parameters of the new algorithms.

Example Images

I have included example images that demonstrate the weaknesses of the current algorithms and created a resource folder:
resources/Snippet384/Example Images.

For detailed information and to participate in discussions about changes to the algorithm, please refer to the accompanying discussion thread.

[github-actions]

Test Results

   545 files  + 6     545 suites  +6   31m 0s ⏱️ + 1m 58s
 4 374 tests +37   4 356 ✅ +36   18 💤 +3  0 ❌  - 2 
16 638 runs  +37  16 498 ✅ +36  140 💤 +3  0 ❌  - 2 

Results for commit 95dc5d5. ± Comparison against base commit 8efc599.

♻️ This comment has been updated with latest results.

[HeikoKlare]

@killingerm I think it would be nice to have this snippet in the repository, even though we already have multiple algorithms implemented productively now, as it allows for easier testing of alternatives and reconfigurations.

To do so, would you please squash your commits into one and sign the Eclipse Contributor Agreement (ECA)?

In addition, we need to link the new snippet in the Snippets.md file at the root of the org.eclipse.swt.snippets bundle. I would propose to add this snippet to the Image section of that markdown file.

[HeikoKlare]

Please add a comment to the class used as the description of the snippet shown in the snippet explorer (see other snippets for a template).

[akurtakov]

@killingerm You have to sign Eclipse contributor agreement in order for your PR to be reviewed - https://www.eclipse.org/legal/eca/