If you set handlescore event handler on the server and run addScore on the server, no matter what is the amount you wish to add, EH always says 1 even though the right amount is added.
Additionally, if handlescore EH is added on client, addscore executed on client will trigger it but again with value of 1
//server
playerserver addeventhandler ["handlescore", {diag_log _this}];
playerserver addscore 20;
EH handler will show something like
[B Alpha 1-1:1 (KK) REMOTE,<NULL-object>,1]
but the MP score will be 20.
can achieve the same on client, only the score will not add to total
player addeventhandler ["handlescore", {systemchat str _this}];
player addscore 20;
[B Alpha 1-1:1 (KK),<NULL-object>,1]
kinda redundant functionality.
I believe that addScore should never trigger HandleScore, or otherwise minimally have a boolean passed to the event code that says if it was triggered manually.
The most likely use for HandleScore is to cancel out all score changes done by the engine, so as to manage scores manually via addScore.
there was recent note on changelog, stating that HandleScore can now be triggered by script. This was added deliberately, addScore didnt trigger handlescore before.
I guess I'm going to stick to my trusty "_player addScore (_newTotal - score _player)"...