How do I trigger this? I'm not seeing anything happen when I click on a System Tray icon with this patch.

Use akregator for example, or the virtual keyboard enable/disable thing.

It's subtle but I quite like it.
It feels a bit inconsistent given it affects plasmoids on keyshortcut, but not on click.

In D19947#438003, @davidedmundson wrote:

It's subtle but I quite like it.

\o/

It feels a bit inconsistent given it affects plasmoids on keyshortcut, but not on click.

Agreed, but here the bug is that on click it doesn't happen I'd say, and we'll have to go over all plasmoids I'm afraid, because they all implement a MouseArea to deal with triggering.
I was looking into introducing context menu on pressAndHold and there's a similar problem.

In D19947#438052, @apol wrote:

In D19947#438003, @davidedmundson wrote:

It's subtle but I quite like it.

\o/

It feels a bit inconsistent given it affects plasmoids on keyshortcut, but not on click.

Agreed, but here the bug is that on click it doesn't happen I'd say, and we'll have to go over all plasmoids I'm afraid, because they all implement a MouseArea to deal with triggering.
I was looking into introducing context menu on pressAndHold and there's a similar problem.

Can we spy mouse click (in C++ side if needed) before it's propagated to applet?

In D19947#438122, @anthonyfieroni wrote:

Can we spy mouse click (in C++ side if needed) before it's propagated to applet?

I tried to do it and failed, it's not that I enjoy complex solutions...

Ping? I still miss this...

Code wise, it's fine.

Personally I like it. If VDG approve, go for it.

The effect doesn't always work for me.

@apol Ping!