Reacting to volume key presses

Questions
1

Hello

I basically want to use Codea to program something akin to a small slide full screen show app (it’s more specialised but this is the least complicated to explain analogy). I would like to be able to hold the ipad and use the hardware volume keys to move to the next / previous slide.

Can this be done from Codea? Or can I query the current system volume setting? (And therefore just do this in my draw function to react to changes).

Cheers,

Bene

2

@Bene Why not just tap the screen to go to the next slide or back to the previous slide.

3

@Bene Codea doesn’t have access to the volume buttons. Here’s a simple program that will let you move from slide to slide just by swiping your thumb or finger on the screen in the direction you want to go. Right now I just us text with the numbers 1 to 15. You would replace the numbers in the table with the pictures you want to show.

displayMode(FULLSCREEN)

function setup()
    fontSize(50)
    tab={1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}
    fill(255)
    pos=1
end

function draw()
    background(40, 40, 50)
    if pos<1 then
        pos=#tab
    elseif pos>#tab then
        pos=1
    end
    text("Slide "..tab[pos],WIDTH/2,HEIGHT/2)
end

function touched(t)
    if t.state==BEGAN then
        h=t.x
    elseif t.state==ENDED then
        if t.x<h then
            pos=pos+1
        end
        if t.x>h then
            pos=pos-1
        end
    end
end
4

The volume keys are less noticeable when pressed, when I hold the iPad facing the audience. As said i am not really writing a slideshow app