Vlad Radulescu Vlad Radulescu - 5 months ago 177
AngularJS Question

How to handle long click event in angular for mobile?

I want to achieve a simple long click (long press) event with angular, working on mobile devices also.

Live code

WORKING ON


  1. Chrome - desktop

  2. Chrome mobile inspector



NOT WORKING ON


  1. iOS ( chrome / safari ) - real device

  2. Android ( chrome ) - real device



HTML

<div class="container-fluid" ng-app="app" ng-controller="MainCtrl">
<center>
<h3 ng-bind="test"></h3>
<div class="box noselect"
on-long-press="itemOnLongPress()"
on-touch-end="itemOnTouchEnd()">
<span>Document</span>
</div>
</center>
</div>


JAVASCRIPT

angular.module('app',[])
.directive('onLongPress', function($timeout) {
return {
restrict: 'A',
link: function($scope, $elm, $attrs) {
$elm.bind('mousedown', function(evt) {
// Locally scoped variable that will keep track of the long press
$scope.longPress = true;

// We'll set a timeout for 600 ms for a long press
$timeout(function() {
if ($scope.longPress) {
// If the touchend event hasn't fired,
// apply the function given in on the element's on-long-press attribute
$scope.$apply(function() {
$scope.$eval($attrs.onLongPress)
});
}
}, 600);
});

$elm.bind('mouseup', function(evt) {
// Prevent the onLongPress event from firing
$scope.longPress = false;
// If there is an on-touch-end function attached to this element, apply it
if ($attrs.onTouchEnd) {
$scope.$apply(function() {
$scope.$eval($attrs.onTouchEnd)
});
}
});
}
};
})

.controller('MainCtrl', function($scope){
$scope.test = 'Angular 1.4.7';
$scope.itemOnLongPress = function(){
$scope.test = "Long pressed";
};
$scope.itemOnTouchEnd = function(){
$scope.test = "Touch end";
};
});


CSS

.box{
width:300px;
height:300px;
background:black;
color:#fff;
font-size:20px;
}
.noselect {
-webkit-touch-callout: none; /* iOS Safari */
-webkit-user-select: none; /* Chrome/Safari/Opera */
-khtml-user-select: none; /* Konqueror */
-moz-user-select: none; /* Firefox */
-ms-user-select: none; /* Internet Explorer/Edge */
user-select: none; /* Non-prefixed version, currently
not supported by any browser */
}

Answer

You need to use touchstart and touchend instead Long Press in JavaScript?:

$elm.bind('touchstart', function(evt) {
    // Locally scoped variable that will keep track of the long press
    $scope.longPress = true;

    // We'll set a timeout for 600 ms for a long press
    $timeout(function() {
        if ($scope.longPress) {
            // If the touchend event hasn't fired,
            // apply the function given in on the element's on-long-press attribute
            $scope.$apply(function() {
                $scope.$eval($attrs.onLongPress)
            });
        }
    }, 600);
});

$elm.bind('touchend', function(evt) {
    // Prevent the onLongPress event from firing
    $scope.longPress = false;