Added the ability to execute methods when the drop down is opened or closed

[Reboog711]

In this change; I added the ability to execute methods when the drop down is opened or closed. It would be used something like this:

In the controller, you'd have code like this:

$scope.onMultiSelectClose = function onMultiSelectClose(){
console.log('on multi-select close');
}

$scope.onMultiSelectOpen= function onMultiSelectOpen(){
console.log('on multi-select open');
}

[isteven]

Thanks Reboog711 for the updates. So I assume the element would be something like:

<div multi-select ... on-popupopen="onMultiSelectOpen" on-popupclose="onMultiSelectClose"></div> 

Am I correct?

[Reboog711]

I guess the HTML got stripped out of my original comment. But, yes. I'd put parenthesis on the function calls like this:

<div multi-select ... on-popupopen="onMultiSelectOpen()" on-popupclose="onMultiSelectClose()"></div> 

[isteven]

Noted. I will most likely modify your code a bit, mainly because I wanted to add more event handlers. Had this in mind for quite some time but rather busy recently, so yeah.

Thanks for the contribution, much appreciated!