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„Lupus
209
src/JS/jquery.ui.touch.js
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209
src/JS/jquery.ui.touch.js
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/**
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* jQuery.UI.iPad plugin
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* Copyright (c) 2010 Stephen von Takach
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* licensed under MIT.
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* Date: 27/8/2010
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*
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* Project Home:
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* http://code.google.com/p/jquery-ui-for-ipad-and-iphone/
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*
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* Modified: 19/01/2012
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* Organized as a proper plugin and added addTouch()
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*/
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(function (factory) {
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if (typeof define === 'function' && define.amd) {
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// AMD. Register as an anonymous module.
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define(['jquery'], factory);
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} else if (typeof module === 'object' && module.exports) {
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// Node/CommonJS
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module.exports = factory(require('jquery'));
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} else {
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// Browser globals
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factory(jQuery);
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}
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}(function ($) {
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var lastTap = null; // Holds last tapped element (so we can compare for double tap)
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var tapValid = false; // Are we still in the .6 second window where a double tap can occur
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var tapTimeout = null; // The timeout reference
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var rightClickPending = false; // Is a right click still feasible
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var rightClickEvent = null; // the original event
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var holdTimeout = null; // timeout reference
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var cancelMouseUp = false; // prevents a click from occuring as we want the context menu
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function cancelTap() {
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tapValid = false;
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};
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function cancelHold() {
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if (rightClickPending) {
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window.clearTimeout(holdTimeout);
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rightClickPending = false;
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rightClickEvent = null;
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}
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};
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function startHold(event) {
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if (rightClickPending)
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return;
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rightClickPending = true; // We could be performing a right click
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rightClickEvent = (event.changedTouches)[0];
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holdTimeout = window.setTimeout(doRightClick, 800);
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};
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function doRightClick() {
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rightClickPending = false;
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// We need to mouse up (as we were down)
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var first = rightClickEvent,
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simulatedEvent = document.createEvent("MouseEvent");
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simulatedEvent.initMouseEvent("mouseup", true, true, window, 1, first.screenX, first.screenY, first.clientX, first.clientY,
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false, false, false, false, 0, null);
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first.target.dispatchEvent(simulatedEvent);
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// Emulate a right click
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simulatedEvent = document.createEvent("MouseEvent");
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simulatedEvent.initMouseEvent("mousedown", true, true, window, 1, first.screenX, first.screenY, first.clientX, first.clientY,
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false, false, false, false, 2, null);
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first.target.dispatchEvent(simulatedEvent);
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// Show a context menu
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simulatedEvent = document.createEvent("MouseEvent");
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simulatedEvent.initMouseEvent("contextmenu", true, true, window, 1, first.screenX + 50, first.screenY + 5, first.clientX + 50, first.clientY + 5,
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false, false, false, false, 2, null);
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first.target.dispatchEvent(simulatedEvent);
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// Note: I don't mouse up the right click here however feel free to add if required
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cancelMouseUp = true;
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rightClickEvent = null; // Release memory
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};
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// mouse over event then mouse down
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function iPadTouchStart(event) {
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var touches = event.changedTouches,
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first = touches[0],
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type = "mouseover",
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simulatedEvent = document.createEvent("MouseEvent");
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// Mouse over first - I have live events attached on mouse over
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simulatedEvent.initMouseEvent(type, true, true, window, 1, first.screenX, first.screenY, first.clientX, first.clientY,
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false, false, false, false, 0, null);
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first.target.dispatchEvent(simulatedEvent);
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type = "mousedown";
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simulatedEvent = document.createEvent("MouseEvent");
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simulatedEvent.initMouseEvent(type, true, true, window, 1, first.screenX, first.screenY, first.clientX, first.clientY,
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false, false, false, false, 0, null);
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first.target.dispatchEvent(simulatedEvent);
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if (!tapValid) {
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lastTap = first.target;
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tapValid = true;
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tapTimeout = window.setTimeout(cancelTap, 600);
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startHold(event);
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}
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else {
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window.clearTimeout(tapTimeout);
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// If a double tap is still a possibility and the elements are the same then perform a double click
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if (first.target == lastTap) {
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lastTap = null;
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tapValid = false;
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type = "click";
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simulatedEvent = document.createEvent("MouseEvent");
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simulatedEvent.initMouseEvent(type, true, true, window, 1, first.screenX, first.screenY, first.clientX, first.clientY,
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false, false, false, false, 0/*left*/, null);
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first.target.dispatchEvent(simulatedEvent);
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type = "dblclick";
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simulatedEvent = document.createEvent("MouseEvent");
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simulatedEvent.initMouseEvent(type, true, true, window, 1, first.screenX, first.screenY, first.clientX, first.clientY,
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false, false, false, false, 0/*left*/, null);
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first.target.dispatchEvent(simulatedEvent);
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}
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else {
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lastTap = first.target;
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tapValid = true;
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tapTimeout = window.setTimeout(cancelTap, 600);
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startHold(event);
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}
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}
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};
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function iPadTouchHandler(event) {
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var type = "",
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button = 0; /*left*/
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if (event.touches.length > 1)
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return;
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switch (event.type) {
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case "touchstart":
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if ($(event.changedTouches[0].target).is("select")) {
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return;
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}
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iPadTouchStart(event); /*We need to trigger two events here to support one touch drag and drop*/
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event.preventDefault();
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return false;
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break;
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case "touchmove":
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cancelHold();
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type = "mousemove";
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event.preventDefault();
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break;
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case "touchend":
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if (cancelMouseUp) {
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cancelMouseUp = false;
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event.preventDefault();
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return false;
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}
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cancelHold();
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type = "mouseup";
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break;
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default:
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return;
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}
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var touches = event.changedTouches,
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first = touches[0],
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simulatedEvent = document.createEvent("MouseEvent");
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simulatedEvent.initMouseEvent(type, true, true, window, 1, first.screenX, first.screenY, first.clientX, first.clientY,
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false, false, false, false, button, null);
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first.target.dispatchEvent(simulatedEvent);
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if (type == "mouseup" && tapValid && first.target == lastTap) { // This actually emulates the ipads default behaviour (which we prevented)
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simulatedEvent = document.createEvent("MouseEvent"); // This check avoids click being emulated on a double tap
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simulatedEvent.initMouseEvent("click", true, true, window, 1, first.screenX, first.screenY, first.clientX, first.clientY,
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false, false, false, false, button, null);
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first.target.dispatchEvent(simulatedEvent);
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}
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};
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var touchAvailable = ("ontouchend" in document);
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$.fn.addTouch = function() {
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if (touchAvailable) {
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this.each(function(i,el){
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el.addEventListener("touchstart", iPadTouchHandler, false);
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el.addEventListener("touchmove", iPadTouchHandler, false);
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el.addEventListener("touchend", iPadTouchHandler, false);
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el.addEventListener("touchcancel", iPadTouchHandler, false);
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});
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}
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};
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}));
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