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67 lines
1.8 KiB
67 lines
1.8 KiB
var Hammer = require('./module/hammer');
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/**
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* Register a touch event, taking place before a gesture
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* @param {Hammer} hammer A hammer instance
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* @param {function} callback Callback, called as callback(event)
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*/
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exports.onTouch = function (hammer, callback) {
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callback.inputHandler = function (event) {
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if (event.isFirst && !isTouching) {
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callback(event);
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isTouching = true;
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setTimeout(function () {
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isTouching = false;
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}, 0);
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}
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};
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hammer.on('hammer.input', callback.inputHandler);
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};
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// isTouching is true while a touch action is being emitted
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// this is a hack to prevent `touch` from being fired twice
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var isTouching = false;
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/**
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* Register a release event, taking place after a gesture
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* @param {Hammer} hammer A hammer instance
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* @param {function} callback Callback, called as callback(event)
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*/
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exports.onRelease = function (hammer, callback) {
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callback.inputHandler = function (event) {
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if (event.isFinal && !isReleasing) {
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callback(event);
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isReleasing = true;
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setTimeout(function () {
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isReleasing = false;
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}, 0);
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}
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};
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return hammer.on('hammer.input', callback.inputHandler);
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};
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// isReleasing is true while a release action is being emitted
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// this is a hack to prevent `release` from being fired twice
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var isReleasing = false;
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/**
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* Unregister a touch event, taking place before a gesture
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* @param {Hammer} hammer A hammer instance
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* @param {function} callback Callback, called as callback(event)
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*/
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exports.offTouch = function (hammer, callback) {
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hammer.off('hammer.input', callback.inputHandler);
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};
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/**
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* Unregister a release event, taking place before a gesture
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* @param {Hammer} hammer A hammer instance
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* @param {function} callback Callback, called as callback(event)
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*/
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exports.offRelease = exports.offTouch;
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