Atm it's scanning all the time and pushing the shutter button down half way makes it focus if the auto-focus is off. I agree though that we should have some kind of graphical and audio indication that something has been scanned successfully.

I'm also going to add the option to use the shutter button to focus then perform processing (for e.g. 3s after the button is pressed), which should save cpu cycles and make the normal display smoother (no need to have the decoder threads running in the bg all the time.)

I noticed this today, but what I saw was that the list of plugins came up pretty quickly, but then when I was tapping buttons there was no graphical response (though eventually the plugin did open.)

This is especially odd as the plugin I wanted to use was the plain "display text" one, which should be pretty lightweight. I need to look into this as it's not acceptable to have delays like this.