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January 3, 2016 04:59
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Tap and Hold directive for angularjs (rmHold).
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app.directive('rmHold', ['$timeout', function($timeout) { | |
return { | |
restrict: 'A', | |
link: function(scope, elem, attrs) { | |
var isActive = false; | |
var currentTimeout = null; | |
var startCoords = { | |
x: null, | |
y: null | |
} | |
var moveCoords = { | |
x: 0, | |
y: 0 | |
} | |
var getCoords = function(evt) { | |
var x = null; | |
var y = null; | |
if (evt.changedTouches && evt.changedTouches[0]) { | |
x = parseInt(evt.changedTouches[0].clientX); | |
y = parseInt(evt.changedTouches[0].clientY); | |
} | |
return {'x': x, 'y': y}; | |
} | |
var validMove = function(beginCoords, endCoords) { | |
var validX = Math.abs(beginCoords.x - endCoords.x) < 20; | |
var validY = Math.abs(beginCoords.y - endCoords.y) < 20; | |
return validX && validY; | |
} | |
elem.on('touchstart', function($event) { | |
isActive = true; | |
startCoords = getCoords($event); | |
currentTimeout = $timeout(function() { | |
if (isActive) { | |
scope.$apply(attrs.rmHold); | |
} | |
}, 800); | |
}); | |
elem.on('touchend touchcancel', function($event) { | |
endHold(); | |
}); | |
elem.on('touchmove', function($event) { | |
if (!isActive) { | |
return; | |
} | |
moveCoords = getCoords($event); | |
if (!validMove(startCoords, moveCoords)) { | |
endHold(); | |
} | |
}); | |
var endHold = function() { | |
isActive = false; | |
if (currentTimeout) { | |
$timeout.cancel(currentTimeout); | |
} | |
currentTimeout = startCoords = moveCoords = null; | |
} | |
} | |
} | |
}]); |
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