Create a Select All option in a dropdown list

<iframe width="560" height="315" src="https://www.youtube.com/embed/d_lkWMc-ebw" frameborder="0" gesture="media" allowfullscreen></iframe>

Listener script

This script listens for a change to customfield_10712 and runs the SelectAllInList.sil script when a change is detected.

lfWatch("customfield_10712", {"customfield_10712"}, "Screen_Listeners/SelectAllInList.sil", "change");

Script

This script is run from the SelectAllInList_watch.sil listener script. It selects all items in a list if the Select All array value is set.

string [] c = argv["customfield_10712"];
string [] colors = {"Black", "Blue", "Brown", "Green", "Orange", "Red", "Yellow", "White"};

if(arrayElementExists(c, "Select All")) {  
    lfSet("customfield_10712" , colors);
}