Load error with NKA Script

Hi Guys,

When you save your NKA preset and then try to load it, the a,b,c knobs stay at the same position and doesn't change, but as soon as you hit again on load the values gets loaded correctly.

Anyone has an eye of an eagle? I can't seem to find the problem here.

Code:

on init
make_perfview

    declare const $data := 2021
    declare ui_knob $a(0,127,1)
    declare ui_knob $b(0,127,1)
    declare ui_knob $c(0,127,1)


    make_persistent ($a)
    make_persistent ($b)
    make_persistent ($c)


    declare $load_arr_id
            $load_arr_id := -1
    declare $save_arr_id
            $save_arr_id := -1
              
    declare ui_button $Load
    set_text($Load,"Load")
    set_control_par_str(get_ui_id($Load), $CONTROL_PAR_PICTURE, "")
    set_control_par(get_ui_id($Load), $CONTROL_PAR_HEIGHT, 15)
    set_control_par(get_ui_id($Load), $CONTROL_PAR_WIDTH, 60)
    set_control_par(get_ui_id($Load),$CONTROL_PAR_POS_X, 380)
       set_control_par(get_ui_id($Load),$CONTROL_PAR_POS_Y, 10)

    declare ui_button $Save
    set_text($Save,"Save")
    set_control_par_str(get_ui_id($Save), $CONTROL_PAR_PICTURE, "")
    set_control_par(get_ui_id($Save), $CONTROL_PAR_HEIGHT, 15)
    set_control_par(get_ui_id($Save), $CONTROL_PAR_WIDTH, 60)
    set_control_par(get_ui_id($Save),$CONTROL_PAR_POS_X, 380)
       set_control_par(get_ui_id($Save),$CONTROL_PAR_POS_Y, 30)
      declare %save_data [$data]
end on

 

on ui_control($Load)
        $a:=%save_data[2]
        $b:=%save_data[3]
        $c:=%save_data[4]
        load_array (%save_data,0)
        $Load :=0
        message("File Loaded")
end on

on ui_control($Save)
        %save_data[2]:=    $a         
        %save_data[3]:=    $b                 
        %save_data[4]:=    $c         
        %save_data[$data]:=$data
        save_array (%save_data,0)
        $Save :=0
        message("File Saved")
end on

on async_complete
    if ($NI_ASYNC_ID = $load_arr_id)
        $load_arr_id := -1
        $Load := 0
    end if
    if ($NI_ASYNC_ID = $save_arr_id)
        $save_arr_id := -1
        $Save := 0
    end if
end on

 

You have to finish loading the array (wait async) before you can assign the values in it to the knobs.

 

Hi Medusa,thank you for the reply.

sorry to say I didn’t quiet understand what you mean. Should I move the wait async up somewhere?

 

At the moment, in your Load code, you're assigning the preset values to the knobs BEFORE you've even loaded the preset. You need to load the preset, wait until it's finished loading (wait async) and only then place those values in the knobs.

 

Hmm im not that good with async stuff so this will take me a while to get right, I'm trying to figure it out. Thanks anyway

 

async is basically a process that we don't know will finish, or when. One such process is loading a file, we can't use the file UNTIL it's been sucessfully loaded. Since loading a file takes time, we use the async complete to know when it's done (we can also find out if it was successful or not). If you just want to wait you can also use the wait_async command inline...

So a simple version of your load could be this

Code:

on ui_control($Load)
    { first load the array,  but wait until that process is finished}
    wait_async(load_array (%save_data,0))
    {  THEN put the values in the knobs}
    $a:=%save_data[2]      
    $b:=%save_data[3]
    $c:=%save_data[4]
    $Load :=0
end on

 

Using wait_async() unfortunately doesn't return exit state (if load NKA file dialog was cancelled, say), so it's still better to use the async_complete callback in such scenarios.

wait_async() is better used for setting user zone parameters, loading FX etc.

 

Of course, I was just trying to make the logic clear and simple to understand.

 

For sure!

 

Thank you Medusa! You explained it very well. Also ED thanks for pointing out that async complete. Really appreciate the help here!