mdDialog: catch the onClose event

问题:

I'm creating a mailbox in angular. And I would need to save the draft message when the popup to send a message closes.

I know there are some alternatives:

scope.$on("$destroy", function () { saveMessage() });

and:

$mdDialog.show(...).finaly(function(){ saveMessage() });

But both are insufficient:

• The first is called when the Dialog is already closed. This is due to the requirements unacceptable (there is an iFrame that needs to be open)
• The second is outside the scope of the controller of the mdDialog, and gives the responsibility to the caller of the pop-up, while it should be in the pop-up itself.

So I'm looking for way to call a function BEFORE the pop-up actually closes. Something like scope.$on("$mdDialogBeforeClose", function () { saveMessage() });

Another option would be to hook every close event. Seems ugly, but might be the solution. In that case I would need to listen to the escape-button and clicking outside the pop-up (Altough I might disable that function)...

Any better ideas?

Thx!

EDIT:

An addition question: How to catch the escape-keypress event? I tried <md-dialog aria-label="List dialog" ng-keypress="keyPress($event)"> but it's not even triggered...

回答1:

Maybe use the onRemoving callback - CodePen

From the docs:

Markup

<div ng-controller="MyController as vm" id="popupContainer" ng-cloak="" ng-app="app">
   <md-button class="md-primary md-raised" ng-click="vm.open($event)">
      Custom Dialog
    </md-button>

  <script type="text/ng-template" id="test.html">
    <md-dialog aria-label="Test">
        Hello!
    </md-dialog>
  </script>
</div>

JS

angular.module('app',['ngMaterial', 'ngMessages', 'material.svgAssetsCache'])

.controller('MyController', function($scope, $mdDialog) {
  this.open = function(ev) {
    $mdDialog.show(
      {
        templateUrl: "test.html",
        clickOutsideToClose: true,
        onRemoving: function (event, removePromise) {
          console.log(123);
        }
    });
  };
})

回答2:

Dialog return a promise using that you can handle dialog close event

var dialogPromise  = $mdDialog.show(
      {
        templateUrl: "test.html",
        clickOutsideToClose: true,
        onRemoving: function (event, removePromise) {
          console.log(123);
        }
    });

dialogPromise.then(function(){
   // hide method handler
   // You can write your code here that execute after dialog close
}, function(){

});