| author | Matt Brubeck <mbrubeck@mozilla.com> |
| Wed, 21 Sep 2011 11:30:32 -0700 | |
| changeset 116 | 4153b586295c |
| parent 105 | b9079103b070 |
| child 119 | 0c5a27a88b04 |
| permissions | -rw-r--r-- |
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<!DOCTYPE html> |
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<html lang="en"> |
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<head> |
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<title>Touch Events version 2</title> |
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<meta http-equiv='Content-Type' content='text/html;charset=utf-8'/> |
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<meta name="viewport" content="width=device-width"> |
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<!-- |
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=== NOTA BENE === |
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For the three scripts below, if your spec resides on dev.w3 you can check them |
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out in the same tree and use relative links so that they'll work offline, |
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--> |
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<script src='http://dev.w3.org/2009/dap/ReSpec.js/js/respec.js' class='remove'></script> |
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<script class='remove'> |
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var respecConfig = {
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// specification status (e.g. WD, LCWD, NOTE, etc.). If in doubt use ED. |
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specStatus: "ED", |
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// the specification's short name, as in http://www.w3.org/TR/short-name/ |
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shortName: "touch-events", |
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// if your specification has a subtitle that goes below the main |
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// formal title, define it here |
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// subtitle : "an excellent document", |
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// if you wish the publication date to be other than today, set this |
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publishDate: "2011-09-22", |
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// if the specification's copyright date is a range of years, specify |
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// the start date here: |
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// copyrightStart: "2005" |
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// if there is a previously published draft, uncomment this and set its YYYY-MM-DD date |
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// and its maturity status |
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// previousPublishDate: "1977-03-15", |
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// previousMaturity: "WD", |
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// if there a publicly available Editor's Draft, this is the link |
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edDraftURI: "http://dvcs.w3.org/hg/webevents/raw-file/default/touchevents.html", |
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// if this is a LCWD, uncomment and set the end of its review period |
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// lcEnd: "2009-08-05", |
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// if you want to have extra CSS, append them to this list |
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// it is recommended that the respec.css stylesheet be kept |
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extraCSS: ["http://www.w3.org/StyleSheets/TR/W3C-TR.css", "http://dev.w3.org/2009/dap/ReSpec.js/css/respec.css"], |
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// editors, add as many as you like |
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// only "name" is required |
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editors: [ |
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{ name: "Doug Schepers", url: "http://schepers.cc/",
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company: "W3C", companyURL: "http://w3.org/" }, |
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{ name: "Sangwhan Moon",
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company: "Opera Software ASA", companyURL: "http://www.opera.com/" }, |
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{ name: "Matt Brubeck", url: "http://limpet.net/mbrubeck/",
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company: "Mozilla", companyURL: "http://www.mozilla.org/" }, |
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], |
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// authors, add as many as you like. |
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// This is optional, uncomment if you have authors as well as editors. |
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// only "name" is required. Same format as editors. |
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//authors: [ |
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// { name: "Your Name", url: "http://example.org/",
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// company: "Your Company", companyURL: "http://example.com/" }, |
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//], |
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// name of the WG |
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wg: "Web Events Working Group", |
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// URI of the public WG page |
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wgURI: "http://www.w3.org/2010/webevents/", |
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// name (with the @w3c.org) of the public mailing to which comments are due |
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wgPublicList: "public-webevents", |
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// URI of the patent status for this WG, for Rec-track documents |
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// !!!! IMPORTANT !!!! |
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// This is important for Rec-track documents, do not copy a patent URI from a random |
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// document unless you know what you're doing. If in doubt ask your friendly neighbourhood |
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// Team Contact. |
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wgPatentURI: "http://www.w3.org/2004/01/pp-impl/45559/status", |
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}; |
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</script> |
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<style type="text/css"> |
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.event {
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font-family: monospace; |
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color: #459900; |
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} |
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ISSUE-8: Add an initTouchEvent method.
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ISSUE-8: Add an initTouchEvent method.
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pre.idl {
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ISSUE-8: Add an initTouchEvent method.
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white-space: pre-wrap; |
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ISSUE-8: Add an initTouchEvent method.
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} |
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</style> |
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</head> |
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<body> |
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<section id='abstract'> |
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The Touch Events specification defines a set of low-level events that |
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represent one or more points of contact with a touch-sensitive surface, |
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and changes of those points with respect to the surface and any DOM |
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elements displayed upon it (e.g. for touch screens) or associated with it |
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(e.g. for drawing tablets without displays). It also addresses |
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pen-tablet devices, such as drawing tablets, with consideration toward |
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stylus capabilities. |
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</section> |
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<section id='introduction' class='informative'> |
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<h2>Introduction</h2> |
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<p> |
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User Agents that run on terminals which provide touch input to use web |
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applications typically use interpreted mouse events to allow users |
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to access interactive web applications. However, these interpreted |
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events, being normalized data based on the physical touch input, tend |
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to have limitations on delivering the intended user experience. |
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Additionally, it is not possible to handle concurrent input regardless |
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of device capability, due to constraints of mouse events: both |
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system level limitations and legacy compatibility. |
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</p> |
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<p> |
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Meanwhile, native applications are capable of handling both cases with |
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the provided system APIs. |
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</p> |
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<p> |
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The Touch Events specification provides a solution to this problem by |
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specifying interfaces to allow web applications to directly handle touch |
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events, and multiple touch points for capable devices. |
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</p> |
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</section> |
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<section id='conformance'> |
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<p> |
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This specification defines conformance criteria that apply to a single |
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product: the <dfn id="dfn-user-agent">user agent</dfn> that implements |
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the interfaces that it contains. |
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</p> |
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<p> |
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Implementations that use ECMAScript to implement the APIs defined in |
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this specification must implement them in a manner consistent with the |
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ECMAScript Bindings defined in the Web IDL specification [[!WEBIDL]] as |
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this specification uses that specification and terminology. |
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</p> |
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<p> |
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A conforming implementation is required to implement all fields |
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defined in this specification. |
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</p> |
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</section> |
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<section> |
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<h2><a>Touch</a> Interface</h2> |
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<p> |
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This interface defines an individual point of contact for a touch |
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event. <a>Touch</a> objects are immutable; after one is created, its |
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Issue-16: Specify that Touch/TouchList/TouchEvent objects are immutable.
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attributes must not change. |
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</p> |
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<dl title='interface Touch' class='idl'> |
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<dt>readonly attribute long identifier</dt> |
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<dd> |
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ISSUE-15: identifier attribute should be an opaque token
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An identification number for each <a>touch point</a>. |
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ISSUE-15: identifier attribute should be an opaque token
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When a touch point becomes active, it must be assigned an |
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ISSUE-15: identifier attribute should be an opaque token
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<a>identifier</a> that is distinct from any other <a>active touch |
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ISSUE-15: identifier attribute should be an opaque token
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point</a>. While the touch point remains active, all events that |
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refer to it must assign it the same <a>identifier</a>. |
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</dd> |
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<dt>readonly attribute long screenX</dt> |
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<dd> |
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x-coordinate of point relative to the screen |
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</dd> |
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<dt>readonly attribute long screenY</dt> |
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y-coordinate of point relative to the screen |
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</dd> |
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<dt>readonly attribute long clientX</dt> |
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<dd> |
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x-coordinate of point relative to the viewport, excluding any scroll |
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offset |
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</dd> |
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<dt>readonly attribute long clientY</dt> |
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<dd> |
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y-coordinate of point relative to the viewport, excluding any scroll |
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offset |
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</dd> |
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<dt>readonly attribute long pageX</dt> |
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<dd> |
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x-coordinate of point relative to the viewport, including any scroll |
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offset |
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</dd> |
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<dt>readonly attribute long pageY</dt> |
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<dd> |
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y-coordinate of point relative to the viewport, including any scroll |
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offset |
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</dd> |
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<dt>readonly attribute long radiusX</dt> |
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<dd> |
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the radius of the ellipse which most closely circumscribes the |
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touching area (e.g. finger, stylus) along the x-axis, in pixels of |
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the same scale as <a>screenX</a>; <code>1</code> if no value is |
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known. The value must be positive. |
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<p class="issue" id="issue-units"><strong>Issue:</strong> What are |
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units of radiusX/radiusY? CSS Pixels?</p> |
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</dd> |
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<dt>readonly attribute long radiusY</dt> |
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<dd> |
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the radius of the ellipse which most closely circumscribes the |
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touching area (e.g. finger, stylus) along the y-axis, in pixels of |
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the same scale as <a>screenY</a>; <code>1</code> if no value is |
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known. The value must be positive. |
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</dd> |
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ISSUE-1: Add rotationAngle attribute for elliptical touch areas.
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<dt>readonly attribute float rotationAngle</dt> |
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ISSUE-1: Add rotationAngle attribute for elliptical touch areas.
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<dd> |
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<p> |
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the angle (in degrees) that the ellipse described by <a>radiusX</a> |
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and <a>radiusY</a> is rotated clockwise about its center; |
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<code>0</code> if no value is known. The value must be greater |
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than or equal to <code>0</code> and less than <code>90</code>. |
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</p> |
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<p> |
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If the ellipse described by <a>radiusX</a> and <a>radiusY</a> is |
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circular, then <a>rotationAngle</a> has no effect. The user agent |
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may use <code>0</code> as the value in this case, or it may use any |
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other value in the allowed range. (For example, the user agent may |
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use the <a>rotationAngle</a> value from the previous touch event, |
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to avoid sudden changes.) |
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</p> |
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</dd> |
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|
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<dt>readonly attribute float force</dt> |
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<dd> |
| 85 | 240 |
a relative value of pressure applied, in the range <code>0</code> to |
241 |
<code>1</code>, where <code>0</code> is no pressure, and |
|
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<code>1</code> is the highest level of pressure the touch device is |
|
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capable of sensing; <code>0</code> if no value is known. In |
|
244 |
environments where <a>force</a> is known, the absolute pressure |
|
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represented by the <a>force</a> attribute, and the sensitivity in |
|
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levels of pressure, may vary. |
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|
| 85 | 248 |
<p class="issue" id="issue-inkml"> |
249 |
<strong>Issue:</strong> |
|
250 |
Consider aligning with other "channels" and values from |
|
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<a href="http://www.w3.org/TR/InkML/#channelContents">Ink Markup |
|
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Language (InkML)</a>, in addition to <a>force</a>, e.g. adding |
|
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<a>angle</a>, <a>clientZ</a>, <a>rotation</a>, etc. |
|
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</p> |
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</dd> |
| 5 | 256 |
</dl> |
257 |
</section> |
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<section> |
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<h2><a>TouchList</a> Interface</h2> |
| 85 | 261 |
<p> |
262 |
This interface defines a list of individual points of contact for a |
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touch event. <a>TouchList</a> objects are immutable; after one is |
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created, its contents must not change. |
| 85 | 265 |
</p> |
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|
| 5 | 267 |
<dl title='interface TouchList' class='idl'> |
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<dt>readonly attribute unsigned long length</dt> |
|
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<dd> |
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returns the number of <a>Touch</a>es in the list |
| 5 | 271 |
</dd> |
| 103 | 272 |
<dt>getter <a>Touch</a> item (in unsigned long index)</dt> |
| 5 | 273 |
<dd> |
| 103 | 274 |
returns the <a>Touch</a> at the specified index in the list |
| 5 | 275 |
</dd> |
| 103 | 276 |
<dt><a>Touch</a> identifiedTouch (in long identifier)</dt> |
| 5 | 277 |
<dd> |
| 103 | 278 |
returns the first <a>Touch</a> item in the list whose <a>identifier</a> property matches the specified identifier |
| 5 | 279 |
</dd> |
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</dl> |
|
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</section> |
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282 |
||
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<section> |
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<h2><a>TouchEvent</a> Interface</h2> |
| 85 | 285 |
<p> |
286 |
This interface defines the <a>touchstart</a>, <a>touchend</a>, |
|
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<a>touchmove</a>, <a>touchenter</a>, <a>touchleave</a>, and |
|
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<a>touchcancel</a> event types. <a>TouchEvent</a> objects are |
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immutable; after one is created and initialized, its attributes must |
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not change. |
| 85 | 291 |
</p> |
| 5 | 292 |
|
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<dl title='interface TouchEvent : UIEvent' class='idl'> |
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<dt>readonly attribute <a>TouchList</a> touches</dt> |
| 4 | 295 |
<dd> |
| 85 | 296 |
a list of <a>Touch</a>es for every point of contact currently |
| 99 | 297 |
touching the surface. |
| 4 | 298 |
</dd> |
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<dt>readonly attribute <a>TouchList</a> targetTouches</dt> |
| 4 | 300 |
<dd> |
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|
301 |
a list of <a>Touch</a>es for every point of contact that is touching |
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|
302 |
the surface <em>and</em> started on the element that is the |
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|
303 |
<a>target</a> of the current event. |
| 4 | 304 |
</dd> |
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|
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<dt>readonly attribute <a>TouchList</a> changedTouches</dt> |
| 4 | 306 |
<dd> |
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|
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<p> |
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|
308 |
a list of <a>Touch</a>es for every point of contact which contributed |
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|
309 |
to the event. |
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|
310 |
</p> |
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|
311 |
<p> |
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|
312 |
For the <a>touchstart</a> event this must be a list of the touch |
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|
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points that just became active with the current event. For the |
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|
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<a>touchmove</a> event this must be a list of the touch points that |
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|
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have moved since the last event. For the <a>touchend</a> event |
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|
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this must be a list of the touch points that have just been removed |
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|
317 |
from the surface. For the <a>touchenter</a> and <a>touchleave</a> |
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|
318 |
events, this must be a list of the touch points that have just |
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|
319 |
entered or left the target element. |
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|
320 |
</p> |
| 4 | 321 |
</dd> |
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|
322 |
|
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|
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<dt>readonly attribute boolean altKey</dt> |
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|
324 |
<dd> |
| 85 | 325 |
<code>true</code> if the alt (Alternate) key modifier is activated; |
326 |
otherwise <code>false</code> |
|
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|
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</dd> |
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|
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<dt>readonly attribute boolean metaKey</dt> |
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|
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<dd> |
| 85 | 330 |
<code>true</code> if the meta (Meta) key modifier is activated; |
331 |
otherwise <code>false</code>. On some platforms this attribute may |
|
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map to a differently-named key modifier. |
|
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|
333 |
</dd> |
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|
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<dt>readonly attribute boolean ctrlKey</dt> |
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|
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<dd> |
| 85 | 336 |
<code>true</code> if the ctrl (Control) key modifier is activated; |
337 |
otherwise <code>false</code> |
|
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|
338 |
</dd> |
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|
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<dt>readonly attribute boolean shiftKey</dt> |
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|
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<dd> |
| 85 | 341 |
<code>true</code> if the shift (Shift) key modifier is activated; |
342 |
otherwise <code>false</code> |
|
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|
343 |
</dd> |
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|
344 |
<dt>readonly attribute EventTarget relatedTarget</dt> |
|
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|
345 |
<dd> |
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|
346 |
identifies a secondary EventTarget related to a touch event. This |
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|
347 |
attribute is used with the <a>touchenter</a> event to indicate the |
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|
348 |
<a>EventTarget</a> the touch point exited, and with the |
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|
349 |
<a>touchleave</a> event to indicate the <a>EventTarget</a> the touch |
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|
350 |
point entered. For other event types, this attribute must be |
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|
351 |
<code>null</code>. |
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|
352 |
</dd> |
|
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|
353 |
|
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|
354 |
<!-- Methods --> |
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|
355 |
<dt>void initTouchEvent()</dt> |
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|
356 |
<dd> |
| 85 | 357 |
initializes a TouchEvent created through the <a>DocumentEvent</a> |
358 |
interface. |
|
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|
359 |
<dl class='parameters'> |
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|
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<dt>DOMString type</dt> <dd></dd> |
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|
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<dt>boolean canBubble</dt> <dd></dd> |
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|
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<dt>boolean cancelable</dt> <dd></dd> |
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<dt>AbstractView view</dt> <dd></dd> |
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<dt>long detail</dt> <dd></dd> |
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|
365 |
<dt>boolean ctrlKey</dt> <dd></dd> |
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|
366 |
<dt>boolean altKey</dt> <dd></dd> |
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<dt>boolean shiftKey</dt> <dd></dd> |
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<dt>boolean metaKey</dt> <dd></dd> |
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<dt>TouchList touches</dt> <dd></dd> |
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<dt>TouchList targetTouches</dt> <dd></dd> |
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<dt>TouchList changedTouches</dt> <dd></dd> |
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</dl> |
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</dd> |
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</dl> |
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<section class="informative"> |
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<h2>Usage Examples</h2> |
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<p> |
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The examples below demonstrate the relations between the different |
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<a>TouchList</a> members defined in a <a>TouchEvent</a>. |
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</p> |
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<section> |
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<h3>touches and targetTouches of a <a>TouchEvent</a></h3> |
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<p> |
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This example demonstrates the utility and relations between the |
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touches and targetTouches members defined in the <a>TouchEvent</a> |
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interface. The following code will generate different output based |
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on the number of touch points on the touchable element and the document: |
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</p> |
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<pre class="example"> |
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<div id='touchable'> |
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This element is touchable. |
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</div> |
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document.getElementById('touchable').addEventListener('touchstart', function(ev) {
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if (ev.touches.item(0) == ev.targetTouches.item(0)) |
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{
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/** |
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* If the first touch on the surface is also targeting the |
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* "touchable" element, the code below should execute. |
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* Since targetTouches is a subset of touches which covers the |
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* entire surface, TouchEvent.touches >= TouchEvents.targetTouches |
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* is always true. |
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*/ |
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document.write('Hello Touch Events!');
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} |
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if (ev.touches.length == ev.targetTouches.length) |
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{
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/** |
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* If all of the active touch points are on the "touchable" |
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* element, the length properties should be the same. |
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*/ |
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document.write('All points are on target element')
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} |
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if (ev.touches.length > 1) |
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{
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/** |
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* On a single touch input device, there can only be one point |
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* of contact on the surface, so the following code can only |
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* execute when the terminal supports multiple touches. |
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*/ |
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document.write('Hello Multiple Touch!');
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} |
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}, false); |
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</pre> |
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</section> |
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<section> |
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<h3>changedTouches of a <a>TouchEvent</a></h3> |
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<p> |
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This example demonstrates the utility of changedTouches and it's relation |
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with the other <a>TouchList</a> members of the <a>TouchEvent</a> interface. |
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The code is a example which triggers whenever a touch point is removed |
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from the defined touchable element: |
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</p> |
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<pre class="example"> |
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<div id='touchable'> |
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This element is touchable. |
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</div> |
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document.getElementById('touchable').addEventListener('touchend', function(ev) {
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/** |
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* Example output when three touch points are on the surface, |
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* two of them being on the "touchable" element and one point |
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* in the "touchable" element is lifted from the surface: |
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* |
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* Touch points removed: 1 |
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* Touch points left on element: 1 |
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* Touch points left on document: 2 |
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*/ |
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document.write('Removed: ' + ev.changedTouches.length);
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document.write('Remaining on element: ' + ev.targetTouches.length);
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document.write('Remaining on document: ' + ev.touches.length);
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}, false); |
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</pre> |
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</section> |
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</section> |
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<section> |
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<h3 id="event-touchstart">The <dfn class="event">touchstart</dfn> |
478 |
event</h3> |
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<p> |
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480 |
A user agent must dispatch this event type to indicate when the user |
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places a <a>touch point</a> on the touch surface. |
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</p> |
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<p> |
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The target of this event must be an <a>Element</a>. If the touch |
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|
486 |
point is within a frame, the event should be dispatched to an element |
|
29ec4253b862
Issue-6: Events should be dispatched to targets within frames.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
92
diff
changeset
|
487 |
in the <a>child browsing context</a> of that frame. |
| 85 | 488 |
</p> |
|
95
80bd73a2e5b2
preventDefault recommendations for touchstart/touchmove and scrolling.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
94
diff
changeset
|
489 |
|
|
80bd73a2e5b2
preventDefault recommendations for touchstart/touchmove and scrolling.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
94
diff
changeset
|
490 |
<p> |
|
80bd73a2e5b2
preventDefault recommendations for touchstart/touchmove and scrolling.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
94
diff
changeset
|
491 |
If the <a>preventDefault</a> method is called on this event, it |
|
80bd73a2e5b2
preventDefault recommendations for touchstart/touchmove and scrolling.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
94
diff
changeset
|
492 |
should prevent any default actions caused by any touch events |
|
80bd73a2e5b2
preventDefault recommendations for touchstart/touchmove and scrolling.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
94
diff
changeset
|
493 |
associated with the same <a>active touch point</a>, including mouse |
|
80bd73a2e5b2
preventDefault recommendations for touchstart/touchmove and scrolling.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
94
diff
changeset
|
494 |
events or scrolling. |
|
80bd73a2e5b2
preventDefault recommendations for touchstart/touchmove and scrolling.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
94
diff
changeset
|
495 |
</p> |
| 5 | 496 |
</section> |
|
20
3a04fe9b8ef2
Clean up some trailing whitespace and old comments.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
19
diff
changeset
|
497 |
|
| 5 | 498 |
<section> |
|
9
8171bbe11ccc
changed floats to longs; clarified definitions; added editors Moon, Brubeck; tidied ReSpec code; fixed credits; revised touchcancel event
shepazu <schepers@w3.org>
parents:
8
diff
changeset
|
499 |
<h3 id="event-touchend">The <dfn class="event">touchend</dfn> event</h3> |
| 85 | 500 |
<p> |
501 |
A user agent must dispatch this event type to indicate when the user |
|
502 |
removes a <a>touch point</a> from the touch surface, also including |
|
503 |
cases where the touch point physically leaves the touch surface, such |
|
504 |
as being dragged off of the screen. |
|
505 |
</p> |
|
|
54
be35b766b5ef
Wrap some text to 80 characters.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
53
diff
changeset
|
506 |
|
| 85 | 507 |
<p> |
508 |
The <a>target</a> of this event must be the same <a>Element</a> that |
|
509 |
received the <a>touchstart</a> event when this <a>touch point</a> was |
|
510 |
placed on the surface, even if the <a>touch point</a> has since moved |
|
511 |
outside the interactive area of the <a>target</a> element. |
|
512 |
</p> |
|
|
55
7df98116715b
Clarify targeting of touchmove and touchend events, and add tests.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
54
diff
changeset
|
513 |
|
| 85 | 514 |
<p> |
515 |
The <a>touch point</a> or points that were removed must be included |
|
516 |
in the <a>changedTouches</a> attribute of the <a>TouchEvent</a>, and |
|
517 |
must not be included in the <a>touches</a> and <a>targetTouches</a> |
|
518 |
attributes. |
|
519 |
</p> |
|
| 5 | 520 |
</section> |
|
20
3a04fe9b8ef2
Clean up some trailing whitespace and old comments.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
19
diff
changeset
|
521 |
|
| 5 | 522 |
<section> |
|
9
8171bbe11ccc
changed floats to longs; clarified definitions; added editors Moon, Brubeck; tidied ReSpec code; fixed credits; revised touchcancel event
shepazu <schepers@w3.org>
parents:
8
diff
changeset
|
523 |
<h3 id="event-touchmove">The <dfn class="event">touchmove</dfn> event</h3> |
| 85 | 524 |
<p> |
525 |
A user agent must dispatch this event type to indicate when the user |
|
526 |
moves a <a>touch point</a> along the touch surface. |
|
527 |
</p> |
|
|
54
be35b766b5ef
Wrap some text to 80 characters.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
53
diff
changeset
|
528 |
|
| 85 | 529 |
<p> |
530 |
The <a>target</a> of this event must be the same <a>Element</a> that |
|
531 |
received the <a>touchstart</a> event when this <a>touch point</a> was |
|
532 |
placed on the surface, even if the <a>touch point</a> has since moved |
|
533 |
outside the interactive area of the <a>target</a> element. |
|
534 |
</p> |
|
|
54
be35b766b5ef
Wrap some text to 80 characters.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
53
diff
changeset
|
535 |
|
| 85 | 536 |
<p> |
537 |
If the values of <a>radiusX</a>, <a>radiusY</a>, |
|
538 |
<a>rotationAngle</a>, or <a>force</a> are known, then the user agent |
|
539 |
also must dispatch this event type to indicate when any of these |
|
540 |
attributes of a <a>touch point</a> have changed. |
|
541 |
</p> |
|
542 |
||
543 |
<p> |
|
544 |
Note that the rate at which the user agent sends <a>touchmove</a> |
|
545 |
events is implementation-defined, and may depend on hardware |
|
546 |
capabilities and other implementation details. |
|
547 |
</p> |
|
|
95
80bd73a2e5b2
preventDefault recommendations for touchstart/touchmove and scrolling.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
94
diff
changeset
|
548 |
|
|
80bd73a2e5b2
preventDefault recommendations for touchstart/touchmove and scrolling.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
94
diff
changeset
|
549 |
<p> |
|
80bd73a2e5b2
preventDefault recommendations for touchstart/touchmove and scrolling.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
94
diff
changeset
|
550 |
If the <a>preventDefault</a> method is called on the <em>first</em> |
|
80bd73a2e5b2
preventDefault recommendations for touchstart/touchmove and scrolling.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
94
diff
changeset
|
551 |
<a>touchmove</a> event of an <a>active touch point</a>, it should |
|
80bd73a2e5b2
preventDefault recommendations for touchstart/touchmove and scrolling.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
94
diff
changeset
|
552 |
prevent any default action caused by any <a>touchmove</a> event |
|
80bd73a2e5b2
preventDefault recommendations for touchstart/touchmove and scrolling.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
94
diff
changeset
|
553 |
associated with the same <a>active touch point</a>, such as scrolling. |
|
80bd73a2e5b2
preventDefault recommendations for touchstart/touchmove and scrolling.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
94
diff
changeset
|
554 |
</p> |
| 5 | 555 |
</section> |
|
20
3a04fe9b8ef2
Clean up some trailing whitespace and old comments.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
19
diff
changeset
|
556 |
|
| 5 | 557 |
<section> |
|
9
8171bbe11ccc
changed floats to longs; clarified definitions; added editors Moon, Brubeck; tidied ReSpec code; fixed credits; revised touchcancel event
shepazu <schepers@w3.org>
parents:
8
diff
changeset
|
558 |
<h3 id="event-touchenter">The <dfn class="event">touchenter</dfn> event</h3> |
| 85 | 559 |
<p> |
560 |
A user agent must dispatch this event type to indicate when a |
|
561 |
<a>touch point</a> moves onto the interactive area defined by a DOM |
|
562 |
element. Events of this type must not bubble. |
|
563 |
</p> |
|
| 5 | 564 |
</section> |
|
20
3a04fe9b8ef2
Clean up some trailing whitespace and old comments.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
19
diff
changeset
|
565 |
|
| 5 | 566 |
<section> |
|
9
8171bbe11ccc
changed floats to longs; clarified definitions; added editors Moon, Brubeck; tidied ReSpec code; fixed credits; revised touchcancel event
shepazu <schepers@w3.org>
parents:
8
diff
changeset
|
567 |
<h3 id="event-touchleave">The <dfn class="event">touchleave</dfn> event</h3> |
| 85 | 568 |
<p> |
569 |
A user agent must dispatch this event type to indicate when a |
|
570 |
<a>touch point</a> moves off the interactive area defined by a DOM |
|
571 |
element. Events of this type must not bubble. |
|
572 |
</p> |
|
| 5 | 573 |
</section> |
|
20
3a04fe9b8ef2
Clean up some trailing whitespace and old comments.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
19
diff
changeset
|
574 |
|
| 5 | 575 |
<section> |
| 61 | 576 |
<h3 id="event-touchcancel">The <dfn class="event">touchcancel</dfn> event</h3> |
| 85 | 577 |
<p> |
578 |
A user agent must dispatch this event type to indicate when a touch |
|
579 |
point has been disrupted in an implementation-specific manner, such as |
|
580 |
a synchronous event or action originating from the UA canceling the |
|
581 |
touch, or the touch point leaving the document window into a |
|
582 |
non-document area which is capable of handling user interactions. |
|
583 |
(e.g. The UA's native user interface, plug-ins) A user agent may |
|
584 |
also dispatch this event type when the user places more <a>touch |
|
585 |
point</a>s on the touch surface than the device or implementation is |
|
586 |
configured to store, in which case the earliest <a>Touch</a> object |
|
587 |
in the <a>TouchList</a> should be removed. |
|
588 |
</p> |
|
| 5 | 589 |
</section> |
| 4 | 590 |
</section> |
|
20
3a04fe9b8ef2
Clean up some trailing whitespace and old comments.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
19
diff
changeset
|
591 |
|
|
68
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
592 |
<section> |
|
116
4153b586295c
Extend the Document interface instead of creating a DocumentTouch interface
Matt Brubeck <mbrubeck@mozilla.com>
parents:
105
diff
changeset
|
593 |
<h2>Extensions to the <a>Document</a> Interface</h2> |
| 85 | 594 |
<p> |
|
116
4153b586295c
Extend the Document interface instead of creating a DocumentTouch interface
Matt Brubeck <mbrubeck@mozilla.com>
parents:
105
diff
changeset
|
595 |
The <a>Document</a> interface [[!DOM-LEVEL-3-CORE]] contains methods |
|
4153b586295c
Extend the Document interface instead of creating a DocumentTouch interface
Matt Brubeck <mbrubeck@mozilla.com>
parents:
105
diff
changeset
|
596 |
by which the user can create <a>Touch</a> and <a>TouchList</a> |
|
4153b586295c
Extend the Document interface instead of creating a DocumentTouch interface
Matt Brubeck <mbrubeck@mozilla.com>
parents:
105
diff
changeset
|
597 |
objects. |
| 85 | 598 |
</p> |
|
68
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
599 |
|
|
116
4153b586295c
Extend the Document interface instead of creating a DocumentTouch interface
Matt Brubeck <mbrubeck@mozilla.com>
parents:
105
diff
changeset
|
600 |
<dl title='partial interface Document' class='idl'> |
|
68
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
601 |
<dt>Touch createTouch()</dt> |
|
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
602 |
<dd> |
|
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
603 |
Creates a <a>Touch</a> object with the specified attributes. |
|
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
604 |
<dl class='parameters'> |
|
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
605 |
<dt>AbstractView view</dt> <dd></dd> |
|
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
606 |
<dt>EventTarget target</dt> <dd></dd> |
|
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
607 |
<dt>long identifier</dt> <dd></dd> |
|
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
608 |
<dt>long pageX</dt> <dd></dd> |
|
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
609 |
<dt>long pageY</dt> <dd></dd> |
|
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
610 |
<dt>long screenX</dt> <dd></dd> |
|
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
611 |
<dt>long screenY</dt> <dd></dd> |
|
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
612 |
<dt>optional long radiusX</dt> <dd></dd> |
|
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
613 |
<dt>optional long radiusY</dt> <dd></dd> |
|
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
614 |
<dt>optional float rotationAngle</dt> <dd></dd> |
|
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
615 |
<dt>optional float force</dt> <dd></dd> |
|
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
616 |
</dl> |
|
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
617 |
</dd> |
|
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
618 |
|
|
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
619 |
<dt>TouchList createTouchList()</dt> |
|
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
620 |
<dd> |
| 85 | 621 |
Creates a <a>TouchList</a> object containing the specified |
622 |
<a>Touch</a> objects. |
|
|
68
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
623 |
<dl class='parameters'> |
|
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
624 |
<dt>Touch[] touches</dt> <dd></dd> |
|
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
625 |
</dl> |
|
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
626 |
</dd> |
|
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
627 |
|
|
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
628 |
<dt>TouchList createTouchList()</dt> |
|
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
629 |
<dd> |
|
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
630 |
Creates a <a>TouchList</a> object containing a single <a>Touch</a>. |
|
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
631 |
<dl class='parameters'> |
|
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
632 |
<dt>Touch touch</dt> <dd></dd> |
|
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
633 |
</dl> |
|
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
634 |
</dd> |
|
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
635 |
</dl> |
|
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
636 |
</section> |
|
e8bb9dc16d4e
Specify createTouch and createTouchList interfaces.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
66
diff
changeset
|
637 |
|
|
35
8624a3d5cbd7
ISSUE-9: Interaction of touch events and mouse events
Matt Brubeck <mbrubeck@mozilla.com>
parents:
34
diff
changeset
|
638 |
<section id="mouse-events"> |
|
8624a3d5cbd7
ISSUE-9: Interaction of touch events and mouse events
Matt Brubeck <mbrubeck@mozilla.com>
parents:
34
diff
changeset
|
639 |
<h2>Interaction with Mouse Events</h2> |
| 85 | 640 |
<p> |
641 |
The user agent may dispatch both touch events and mouse events |
|
642 |
[[!DOM-LEVEL-2-EVENTS]] in response to the same user input. If the |
|
643 |
user agent dispatches both touch events and mouse events in response to |
|
644 |
a single user action, then the <a>touchstart</a> event type must be |
|
645 |
dispatched before any mouse event types for that action. If the |
|
646 |
<a>preventDefault</a> method of <a>touchstart</a> or <a>touchmove</a> |
|
647 |
is called, the user agent should not dispatch any mouse event that |
|
648 |
would be a consequential result of the the prevented touch event. |
|
649 |
</p> |
|
|
58
22e39e76033e
Specify basic preventDefault behavior.
Matt Brubeck <mbrubeck@mozilla.com>
parents:
57
diff
changeset
|
650 |
|
| 85 | 651 |
<p> |
|
98
4ad645b57624
More clarification of behavior for mouse events (ISSUE-3)
Matt Brubeck <mbrubeck@mozilla.com>
parents:
97
diff
changeset
|
652 |
If the user agent intreprets a sequence of touch events as a click, |
|
4ad645b57624
More clarification of behavior for mouse events (ISSUE-3)
Matt Brubeck <mbrubeck@mozilla.com>
parents:
97
diff
changeset
|
653 |
then it should dispatch <a>mousemove</a>, <a>mousedown</a>, |
|
4ad645b57624
More clarification of behavior for mouse events (ISSUE-3)
Matt Brubeck <mbrubeck@mozilla.com>
parents:
97
diff
changeset
|
654 |
<a>mouseup</a>, and <a>click</a> events (in that order) at the location |
|
4ad645b57624
More clarification of behavior for mouse events (ISSUE-3)
Matt Brubeck <mbrubeck@mozilla.com>
parents:
97
diff
changeset
|
655 |
of the <a>touchend</a> event for the corresponding touch input. If the |
|
4ad645b57624
More clarification of behavior for mouse events (ISSUE-3)
Matt Brubeck <mbrubeck@mozilla.com>
parents:
97
diff
changeset
|
656 |
contents of the document have changed during processing of the touch |
|
4ad645b57624
More clarification of behavior for mouse events (ISSUE-3)
Matt Brubeck <mbrubeck@mozilla.com>
parents:
97
diff
changeset
|
657 |
events, then the user agent may dispatch the mouse events to a |
|
4ad645b57624
More clarification of behavior for mouse events (ISSUE-3)
Matt Brubeck <mbrubeck@mozilla.com>
parents:
97
diff
changeset
|
658 |
different target than the touch events. |
|
97
3f54db94ae0d
ISSUE-3: Click events should be dispatched after any touch events are processed.
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|
659 |
</p> |
|
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ISSUE-3: Click events should be dispatched after any touch events are processed.
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|
660 |
|
|
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ISSUE-3: Click events should be dispatched after any touch events are processed.
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|
661 |
<p> |
| 85 | 662 |
The default actions and ordering of any further touch and mouse events |
663 |
are implementation-defined, except as specified elsewhere. |
|
664 |
</p> |
|
|
35
8624a3d5cbd7
ISSUE-9: Interaction of touch events and mouse events
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|
665 |
</section> |
|
8624a3d5cbd7
ISSUE-9: Interaction of touch events and mouse events
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|
666 |
|
|
10
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|
667 |
<section> |
|
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|
668 |
<h2>Glossary</h2> |
|
20
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|
669 |
|
|
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|
670 |
<dl> |
|
91
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ISSUE-15: identifier attribute should be an opaque token
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|
671 |
<dt><dfn>active touch point</dfn></dt> |
| 85 | 672 |
<dd> |
|
91
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|
673 |
A <a>touch point</a> which is currently on the screen and is being |
|
b2c4ba0eb943
ISSUE-15: identifier attribute should be an opaque token
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|
674 |
tracked by the user agent. The touch point becomes active when the |
|
b2c4ba0eb943
ISSUE-15: identifier attribute should be an opaque token
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|
675 |
user agent first dispatches a <a>touchstart</a> event indicating its |
|
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ISSUE-15: identifier attribute should be an opaque token
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|
676 |
appearance. It ceases to be active after the user agent dispatches a |
|
b2c4ba0eb943
ISSUE-15: identifier attribute should be an opaque token
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changeset
|
677 |
<a>touchend</a> or <a>touchcancel</a> event indicating that the touch |
|
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ISSUE-15: identifier attribute should be an opaque token
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|
678 |
point is removed from the surface or no longer tracked. |
|
10
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|
679 |
</dd> |
|
20
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|
680 |
|
| 12 | 681 |
<dt><dfn>touch point</dfn></dt> |
| 85 | 682 |
<dd> |
683 |
The coordinate point at which a pointer (e.g finger or stylus) |
|
684 |
intersects the target surface of an interface. This may apply to a |
|
685 |
finger touching a touch-screen, or an digital pen writing on a piece |
|
686 |
of paper. |
|
687 |
</dd> |
|
|
10
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|
688 |
</dl> |
|
bad00fb0d663
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|
689 |
</section> |
|
20
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|
690 |
|
|
71
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changeset
|
691 |
<section id='issues' class='informative'> |
|
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|
692 |
<h2>Issues</h2> |
| 85 | 693 |
<p> |
694 |
The working group maintains <a |
|
695 |
href='http://www.w3.org/2010/webevents/track/products/2' |
|
696 |
>a list of open issues in this specification</a>. These issues may be |
|
697 |
addressed in future revisions of the specification. |
|
698 |
</p> |
|
|
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|
699 |
</section> |
|
4c4b691aab2a
Add a link to the issue tracker.
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|
700 |
|
|
4c4b691aab2a
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|
701 |
<section class='appendix informative'> |
| 4 | 702 |
<h2>Acknowledgements</h2> |
703 |
<p> |
|
| 85 | 704 |
Many thanks to the WebKit engineers for developing the model used as a |
705 |
basis for this spec, Neil Roberts (SitePen) for his summary of WebKit |
|
| 86 | 706 |
touch events, Peter-Paul Koch (PPK) for his write-ups and suggestions, |
| 85 | 707 |
Robin Berjon for developing the <a |
708 |
href="http://dev.w3.org/2009/dap/ReSpec.js/documentation.html" |
|
709 |
>ReSpec.js spec authoring tool</a>, and the WebEvents WG for their many |
|
710 |
contributions. |
|
| 4 | 711 |
</p> |
|
20
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|
712 |
|
| 85 | 713 |
<p> |
714 |
Many others have made additional comments as the spec developed, which |
|
715 |
have led to steady improvements. Among them are Matthew Schinckel, |
|
716 |
Andrew Grieve, and Cathy Chan. If I inadvertently omitted your name, |
|
717 |
please let me know. |
|
718 |
</p> |
|
| 4 | 719 |
</section> |
720 |
</body> |
|
721 |
</html> |