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creates a "press" event that uses clicks for mouses and touchend for touch devices. Current dependencies: jQuery and Modernizr for touch support detection
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// jquery.event.press | |
(function($, Modernizr) { | |
"use strict"; | |
var touchEnabled = Modernizr && Modernizr.touch; | |
if ( touchEnabled ) { | |
// Lift touch properties using fixHooks, inspired by jquery.panzoom, with checks | |
var touchHook = { props: [ "touches", "targetTouches", "changedTouches", "pageX", "pageY" ] }; | |
$.each([ "touchstart", "touchmove", "touchend" ], function( i, name ) { | |
var existingHook = $.event.fixHooks[ name ]; | |
if ( ! existingHook ) { | |
$.event.fixHooks[ name ] = touchHook; | |
} else { | |
if ( existingHook.props ) { | |
existingHook.props = existingHook.props.concat(touchHook.props); | |
} else { | |
existingHook.props = touchHook.props; | |
} | |
} | |
}); | |
} | |
var extendEvent = function(ev, namespace) { | |
return $.extend({}, ev, { | |
type: 'press', | |
namespace: namespace, | |
pageX: ev.changedTouches ? ev.changedTouches[0].pageX : ev.pageX, | |
pageY: ev.changedTouches ? ev.changedTouches[0].pageY : ev.pageY | |
}); | |
}; | |
$.event.special.press = { | |
add: function(handleObj) { | |
var threshold = ( handleObj.data && handleObj.data.threshold ) || 6; | |
var namespace = 'press' + ( handleObj.namespace ? '.' + handleObj.namespace : '' ); | |
var selector = handleObj.selector; | |
var el = $(this); | |
if ( touchEnabled ) { | |
el.on('touchstart.' + namespace, selector, function(ev) { | |
var canClick = true; | |
var startX = ev.pageX; | |
var startY = ev.pageY; | |
el.on('touchmove.' + namespace, selector, function(ev) { | |
var deltaX = startX - ev.pageX; | |
var deltaY = startY - ev.pageY; | |
if ( ( deltaX * deltaX ) + ( deltaY * deltaY ) > ( threshold * threshold ) ) { | |
canClick = false; | |
} | |
}).on('touchend.' + namespace, selector, function(ev) { | |
if ( canClick ) { | |
var event = extendEvent(ev, handleObj.namespace); | |
$(this).trigger(event).off('touchmove.' + namespace + ' touchend.' + namespace); | |
} | |
canClick = true; | |
}); | |
}); | |
} else { | |
el.on('click.' + namespace, selector, function(ev) { | |
var event = extendEvent(ev, handleObj.namespace); | |
ev.stopPropagation(); | |
$(this).trigger(event); | |
}); | |
} | |
}, | |
remove: function(handleObj) { | |
var namespace = handleObj.namespace ? '.' + handleObj.namespace : ''; | |
$(this).off('.press' + namespace, handleObj.selector); | |
} | |
}; | |
})(jQuery, Modernizr); |
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