I fired up the ParticleEditor demo, by using Qt Creator “Open Project” to open
(fantastic demo app, by the way)
I used the third screen of the right hand menu to change the behaviour to “1”.
Then I went to the next screen of the right hand menu to change the X and Y of the emitter, and sure enough the particles follow the position of the emitter.
And in fact, no matter what I tried (combinations of particle mode and type and particle speed) the particles position appears to be tied to the position of the emitter.
Maybe this is a limitation of the particle system: in order to operate efficiently, the particles aren’t part of the game world, so they can’t be “cut loose” from the emitter?