Mouse wheel over notification area icon

[emoacht]

Regarding the request to change the brightness by mouse wheel over the notification area icon, as I explained in #174, the implementation by global hook is very inefficient and thus not desirable.

Instead, I added a function to capture mouse wheel over the notification area icon by another approach in 4d7d956
In this implementation, when the mouse cursor enters the rectangle of notification area icon, a semi-transparent window will overlay the icon and receive mouse events. The management of that window is a little tricky and I need to test it for a while.

You can test this function by /iconwheel command-line option.

[duncansmart]

Great idea with the overlay window. However, the scrolling only affects one window when the sliders window is not showing, even though the unison checkboxes are selected for both monitors. The scrolling does work as expected if the sliders window is first displayed and then the mouse is scrolled over the NotifyIcon.

[duncansmart]

Also, I set the Window background to Argb(100, 255, 0, 0) and inflated iconRect (iconRect.Inflate(0, 20)) so i can see the behaviour:

You can occasionally see the MouseLeave logic is unreliable: here my mouse has moved off to the right and the window is still visible:

... OK fine but that also means that the task bar window (which is likely topmost too) can sometimes position itself over our window e.g. if I click the taskbar to the left-hand side of the notification area, the task bar goes back on top, which blocks the mouse input - our window is unaware it's no longer on top so doesn't try to activate/reposition itself:

Here you can see the overlay window has gone behind the task bar, hence the mouse messages from the cursor won't reach it:

[emoacht]

Thank you for the feedback.
Probably fixed by 712c1aa and e531e47

[duncansmart]

• ✅ The icon mouse wheel option is very stable now
• 🤔 No improvement on the unison option.