A Different Approach

So yesterday I had a working windows version of mouse lock. The problem was that it required you to go a long way just to get both of the things you needed for the widget to know mouse lock was on, and it was OS specific. But the new solution says that nsIWidget doesn’t need to know.

nsEventStateManager will store if mouse lock is on. And the MouseLockable on lock() and unlock() will set that boolean value. When the mouse is moved and mouse lock is on, the nsEventStateManager will call aEvent->widget->SynthesizeNativeMouseEvent() with the coordinates of center of the screen, and the appropriate native message based on the OS. nsIWidget’s SynthesizeNativeMouseEvent() calls SetCursorPos() on windows just like I was doing, and the correct version for each OS. So it looks like everything is still working, but with a lot less code, and a lot more code that works on all supported operating systems.

The only problem is that not all operating systems have nsIWidget’s SynthesizeNativeMouseEvent() function implemented, so we’re going to have to do some research for the ones that don’t (for example, the GTK2 Linux one was oddly absent), and implement it ourselves.