Emulator

It's actually working as intended (if I remember correctly?). What's happening is that it will follow any window that your mouse is over instead of just being relative to the game.

Well, it works fine in full screen (just tested) but in windowed mode it's very messy. The IR cursor doesn't try to adjust itself only relative to different windows, but to any controls/buttons that window may have (if I hover over Dolphin's config button, for example, it assumes the button square as a "window" and move the IR cursor based to where my mouse cursor is positioned inside that square. This also happens with the taskbar and with the "charms" menu from Windows 8 (they aren't supposed to be treated as windows, are they?).

Anyway, this new behaviour is a little confusing (I thought it was a regression until you answered) and the old one is more consistent from my point of view (IR cursor position relative to your screen, like in a real Wii)...

I think it's a work-around for some kind of issue... maybe skidau can answer?

Um... Ping?

Tested, and it seems perfectly useable in fullscreen. But it's definitely worse in windowed mode than it used to be though - if you have multiple windows up it seems to grab very erratically, attaching itself relatively background stuff in bizzare ways!

I'd really like someone to explain why they chose this behavior...

This new behavior is a lot nicer on my dual monitor setup. Testing in 4.0-5827 has everything off center, even in fullscreen! I'm starting to think this is a "rock, meet hard place" kind of problem...

That PR's behavior is more intuitive than the current behavior, but it doesn't let me go beyond the window, preventing the IR cursor from reaching the edges of the screen depending on the emulated game and Wiimote settings. I suppose the solution to that simply is to reconfigure the Wiimote, though.

I have updated the PR so that the IR cursor can be moved off screen.