User:Ackley Bing/List2DialogButtons

// List2DialogButtons() for llDialog use
// example: llDialog(id,"",List2DialogButtons(Gdummylist,Gindex),1);
// Uses "<<" & ">>" dialog buttons for navigation
list Gdummylist=["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"];
//list Gdummylist=["1","2","3","4","5","6","7","8","9","10","11","12"];
integer Gindex;
list List2DialogButtons(list chain, integer i)
{
    list buttons;
    integer j=llGetListLength(chain);
    if (j>12)
        buttons=
        ["<<"]
        +llList2List(chain,wrap(i+9,j),wrap(i+9,j))
        +[">>"]
        +llList2List(chain,wrap(i+6,j),wrap(i+8,j))
        +llList2List(chain,wrap(i+3,j),wrap(i+5,j))
        +llList2List(chain,wrap(i,j),wrap(i+2,j));
    else
    {
        integer k;
        do buttons+=llList2List(chain,k,k);
        while(++k<j);
    }
    return buttons;
}
integer wrap(integer x,integer max){return (((x<0)*(x+max))+((x>=0&&x<max)*x)+((x>=max)*(x-max)));}
default
{
    state_entry()
    {
        llListen(1,"",llGetOwner(),"");
    }
    touch_start(integer index)
    {
        Gindex=0;
        llDialog(llGetOwner()," ",List2DialogButtons(Gdummylist,Gindex),1);
    }
    listen(integer channel, string name, key id, string message)
    {
        if(message=="<<"|message==">>")
        {
            integer total=llGetListLength(Gdummylist);
            Gindex=Gindex+((message==">>")*9)-((message=="<<")*9);
            if(Gindex>=total)Gindex=Gindex-total;
            else if(Gindex<0)Gindex=total-Gindex-2;
            llDialog(llGetOwner()," ",List2DialogButtons(Gdummylist,Gindex),1);
        }
        else
        {
            integer find_index=llListFindList(Gdummylist,[message]);
            if(~find_index)
            {
                // action
            }
        }
    }
}