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2017-2018/ISN/P5js/lib/p5.dom.js

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Amélioration de la découverte de javascript en ISN
2018-05-02 05:12:52 +00:00
/*! p5.dom.js v0.3.4 Jan 19, 2017 */
/**
* <p>The web is much more than just canvas and p5.dom makes it easy to interact
* with other HTML5 objects, including text, hyperlink, image, input, video,
* audio, and webcam.</p>
* <p>There is a set of creation methods, DOM manipulation methods, and
* an extended p5.Element that supports a range of HTML elements. See the
* <a href='https://github.com/processing/p5.js/wiki/Beyond-the-canvas'>
* beyond the canvas tutorial</a> for a full overview of how this addon works.
*
* <p>Methods and properties shown in black are part of the p5.js core, items in
* blue are part of the p5.dom library. You will need to include an extra file
* in order to access the blue functions. See the
* <a href='http://p5js.org/libraries/#using-a-library'>using a library</a>
* section for information on how to include this library. p5.dom comes with
* <a href='http://p5js.org/download'>p5 complete</a> or you can download the single file
* <a href='https://raw.githubusercontent.com/lmccart/p5.js/master/lib/addons/p5.dom.js'>
* here</a>.</p>
* <p>See <a href='https://github.com/processing/p5.js/wiki/Beyond-the-canvas'>tutorial: beyond the canvas</a>
* for more info on how to use this libary.</a>
*
* @module p5.dom
* @submodule p5.dom
* @for p5.dom
* @main
*/
(function(root, factory) {
if (typeof define === 'function' && define.amd)
define('p5.dom', ['p5'], function(p5) {
factory(p5);
});
else if (typeof exports === 'object') factory(require('../p5'));
else factory(root['p5']);
})(this, function(p5) {
// =============================================================================
// p5 additions
// =============================================================================
/**
* Searches the page for an element with the given ID, class, or tag name (using the '#' or '.'
* prefixes to specify an ID or class respectively, and none for a tag) and returns it as
* a p5.Element. If a class or tag name is given with more than 1 element,
* only the first element will be returned.
* The DOM node itself can be accessed with .elt.
* Returns null if none found. You can also specify a container to search within.
*
* @method select
* @param {String} name id, class, or tag name of element to search for
* @param {String|p5.Element|HTMLElement} [container] id, p5.Element, or
* HTML element to search within
* @return {Object|p5.Element|null} p5.Element containing node found
* @example
* <div ><code class='norender'>
* function setup() {
* createCanvas(100, 100);
* //translates canvas 50px down
* select('canvas').position(100, 100);
* }
* </code></div>
* <div><code class='norender'>
* // these are all valid calls to select()
* var a = select('#moo');
* var b = select('#blah', '#myContainer');
* var c, e;
* if (b) {
* c = select('#foo', b);
* }
* var d = document.getElementById('beep');
* if (d) {
* e = select('p', d);
* }
* [a, b, c, d, e]; // unused
* </code></div>
*
*/
p5.prototype.select = function(e, p) {
p5._validateParameters('select', arguments);
var res = null;
var container = getContainer(p);
if (e[0] === '.') {
e = e.slice(1);
res = container.getElementsByClassName(e);
if (res.length) {
res = res[0];
} else {
res = null;
}
} else if (e[0] === '#') {
e = e.slice(1);
res = container.getElementById(e);
} else {
res = container.getElementsByTagName(e);
if (res.length) {
res = res[0];
} else {
res = null;
}
}
if (res) {
return this._wrapElement(res);
} else {
return null;
}
};
/**
* Searches the page for elements with the given class or tag name (using the '.' prefix
* to specify a class and no prefix for a tag) and returns them as p5.Elements
* in an array.
* The DOM node itself can be accessed with .elt.
* Returns an empty array if none found.
* You can also specify a container to search within.
*
* @method selectAll
* @param {String} name class or tag name of elements to search for
* @param {String} [container] id, p5.Element, or HTML element to search within
* @return {Array} Array of p5.Elements containing nodes found
* @example
* <div class='norender'><code>
* function setup() {
* createButton('btn');
* createButton('2nd btn');
* createButton('3rd btn');
* var buttons = selectAll('button');
*
* for (var i = 0; i < buttons.length; i++) {
* buttons[i].size(100, 100);
* }
* }
* </code></div>
* <div class='norender'><code>
* // these are all valid calls to selectAll()
* var a = selectAll('.moo');
* a = selectAll('div');
* a = selectAll('button', '#myContainer');
*
* var d = select('#container');
* a = selectAll('p', d);
*
* var f = document.getElementById('beep');
* a = select('.blah', f);
*
* a; // unused
* </code></div>
*
*/
p5.prototype.selectAll = function(e, p) {
p5._validateParameters('selectAll', arguments);
var arr = [];
var res;
var container = getContainer(p);
if (e[0] === '.') {
e = e.slice(1);
res = container.getElementsByClassName(e);
} else {
res = container.getElementsByTagName(e);
}
if (res) {
for (var j = 0; j < res.length; j++) {
var obj = this._wrapElement(res[j]);
arr.push(obj);
}
}
return arr;
};
/**
* Helper function for select and selectAll
*/
function getContainer(p) {
var container = document;
if (typeof p === 'string' && p[0] === '#') {
p = p.slice(1);
container = document.getElementById(p) || document;
} else if (p instanceof p5.Element) {
container = p.elt;
} else if (p instanceof HTMLElement) {
container = p;
}
return container;
}
/**
* Helper function for getElement and getElements.
*/
p5.prototype._wrapElement = function(elt) {
var children = Array.prototype.slice.call(elt.children);
if (elt.tagName === 'INPUT' && elt.type === 'checkbox') {
var converted = new p5.Element(elt);
converted.checked = function() {
if (arguments.length === 0) {
return this.elt.checked;
} else if (arguments[0]) {
this.elt.checked = true;
} else {
this.elt.checked = false;
}
return this;
};
return converted;
} else if (elt.tagName === 'VIDEO' || elt.tagName === 'AUDIO') {
return new p5.MediaElement(elt);
} else if (elt.tagName === 'SELECT') {
return this.createSelect(new p5.Element(elt));
} else if (
children.length > 0 &&
children.every(function(c) {
return c.tagName === 'INPUT' || c.tagName === 'LABEL';
})
) {
return this.createRadio(new p5.Element(elt));
} else {
return new p5.Element(elt);
}
};
/**
* Removes all elements created by p5, except any canvas / graphics
* elements created by createCanvas or createGraphics.
* Event handlers are removed, and element is removed from the DOM.
* @method removeElements
* @example
* <div class='norender'><code>
* function setup() {
* createCanvas(100, 100);
* createDiv('this is some text');
* createP('this is a paragraph');
* }
* function mousePressed() {
* removeElements(); // this will remove the div and p, not canvas
* }
* </code></div>
*
*/
p5.prototype.removeElements = function(e) {
p5._validateParameters('removeElements', arguments);
for (var i = 0; i < this._elements.length; i++) {
if (!(this._elements[i].elt instanceof HTMLCanvasElement)) {
this._elements[i].remove();
}
}
};
/**
* Helpers for create methods.
*/
function addElement(elt, pInst, media) {
var node = pInst._userNode ? pInst._userNode : document.body;
node.appendChild(elt);
var c = media ? new p5.MediaElement(elt) : new p5.Element(elt);
pInst._elements.push(c);
return c;
}
/**
* Creates a &lt;div&gt;&lt;/div&gt; element in the DOM with given inner HTML.
* Appends to the container node if one is specified, otherwise
* appends to body.
*
* @method createDiv
* @param {String} [html] inner HTML for element created
* @return {Object|p5.Element} pointer to p5.Element holding created node
* @example
* <div class='norender'><code>
* createDiv('this is some text');
* </code></div>
*/
/**
* Creates a &lt;p&gt;&lt;/p&gt; element in the DOM with given inner HTML. Used
* for paragraph length text.
* Appends to the container node if one is specified, otherwise
* appends to body.
*
* @method createP
* @param {String} [html] inner HTML for element created
* @return {Object|p5.Element} pointer to p5.Element holding created node
* @example
* <div class='norender'><code>
* createP('this is some text');
* </code></div>
*/
/**
* Creates a &lt;span&gt;&lt;/span&gt; element in the DOM with given inner HTML.
* Appends to the container node if one is specified, otherwise
* appends to body.
*
* @method createSpan
* @param {String} [html] inner HTML for element created
* @return {Object|p5.Element} pointer to p5.Element holding created node
* @example
* <div class='norender'><code>
* createSpan('this is some text');
* </code></div>
*/
var tags = ['div', 'p', 'span'];
tags.forEach(function(tag) {
var method = 'create' + tag.charAt(0).toUpperCase() + tag.slice(1);
p5.prototype[method] = function(html) {
var elt = document.createElement(tag);
elt.innerHTML = typeof html === 'undefined' ? '' : html;
return addElement(elt, this);
};
});
/**
* Creates an &lt;img&gt; element in the DOM with given src and
* alternate text.
* Appends to the container node if one is specified, otherwise
* appends to body.
*
* @method createImg
* @param {String} src src path or url for image
* @param {String} [alt] alternate text to be used if image does not load
* @param {Function} [successCallback] callback to be called once image data is loaded
* @return {Object|p5.Element} pointer to p5.Element holding created node
* @example
* <div class='norender'><code>
* createImg('http://p5js.org/img/asterisk-01.png');
* </code></div>
*/
p5.prototype.createImg = function() {
p5._validateParameters('createImg', arguments);
var elt = document.createElement('img');
var args = arguments;
var self;
var setAttrs = function() {
self.width = elt.offsetWidth || elt.width;
self.height = elt.offsetHeight || elt.height;
if (args.length > 1 && typeof args[1] === 'function') {
self.fn = args[1];
self.fn();
} else if (args.length > 1 && typeof args[2] === 'function') {
self.fn = args[2];
self.fn();
}
};
elt.src = args[0];
if (args.length > 1 && typeof args[1] === 'string') {
elt.alt = args[1];
}
elt.onload = function() {
setAttrs();
};
self = addElement(elt, this);
return self;
};
/**
* Creates an &lt;a&gt;&lt;/a&gt; element in the DOM for including a hyperlink.
* Appends to the container node if one is specified, otherwise
* appends to body.
*
* @method createA
* @param {String} href url of page to link to
* @param {String} html inner html of link element to display
* @param {String} [target] target where new link should open,
* could be _blank, _self, _parent, _top.
* @return {Object|p5.Element} pointer to p5.Element holding created node
* @example
* <div class='norender'><code>
* createA('http://p5js.org/', 'this is a link');
* </code></div>
*/
p5.prototype.createA = function(href, html, target) {
p5._validateParameters('createA', arguments);
var elt = document.createElement('a');
elt.href = href;
elt.innerHTML = html;
if (target) elt.target = target;
return addElement(elt, this);
};
/** INPUT **/
/**
* Creates a slider &lt;input&gt;&lt;/input&gt; element in the DOM.
* Use .size() to set the display length of the slider.
* Appends to the container node if one is specified, otherwise
* appends to body.
*
* @method createSlider
* @param {Number} min minimum value of the slider
* @param {Number} max maximum value of the slider
* @param {Number} [value] default value of the slider
* @param {Number} [step] step size for each tick of the slider (if step is set to 0, the slider will move continuously from the minimum to the maximum value)
* @return {Object|p5.Element} pointer to p5.Element holding created node
* @example
* <div><code>
* var slider;
* function setup() {
* slider = createSlider(0, 255, 100);
* slider.position(10, 10);
* slider.style('width', '80px');
* }
*
* function draw() {
* var val = slider.value();
* background(val);
* }
* </code></div>
*
* <div><code>
* var slider;
* function setup() {
* colorMode(HSB);
* slider = createSlider(0, 360, 60, 40);
* slider.position(10, 10);
* slider.style('width', '80px');
* }
*
* function draw() {
* var val = slider.value();
* background(val, 100, 100, 1);
* }
* </code></div>
*/
p5.prototype.createSlider = function(min, max, value, step) {
p5._validateParameters('createSlider', arguments);
var elt = document.createElement('input');
elt.type = 'range';
elt.min = min;
elt.max = max;
if (step === 0) {
elt.step = 0.000000000000000001; // smallest valid step
} else if (step) {
elt.step = step;
}
if (typeof value === 'number') elt.value = value;
return addElement(elt, this);
};
/**
* Creates a &lt;button&gt;&lt;/button&gt; element in the DOM.
* Use .size() to set the display size of the button.
* Use .mousePressed() to specify behavior on press.
* Appends to the container node if one is specified, otherwise
* appends to body.
*
* @method createButton
* @param {String} label label displayed on the button
* @param {String} [value] value of the button
* @return {Object|p5.Element} pointer to p5.Element holding created node
* @example
* <div class='norender'><code>
* var button;
* function setup() {
* createCanvas(100, 100);
* background(0);
* button = createButton('click me');
* button.position(19, 19);
* button.mousePressed(changeBG);
* }
*
* function changeBG() {
* var val = random(255);
* background(val);
* }
* </code></div>
*/
p5.prototype.createButton = function(label, value) {
p5._validateParameters('createButton', arguments);
var elt = document.createElement('button');
elt.innerHTML = label;
if (value) elt.value = value;
return addElement(elt, this);
};
/**
* Creates a checkbox &lt;input&gt;&lt;/input&gt; element in the DOM.
* Calling .checked() on a checkbox returns if it is checked or not
*
* @method createCheckbox
* @param {String} [label] label displayed after checkbox
* @param {boolean} [value] value of the checkbox; checked is true, unchecked is false
* @return {Object|p5.Element} pointer to p5.Element holding created node
* @example
* <div class='norender'><code>
* var checkbox;
*
* function setup() {
* checkbox = createCheckbox('label', false);
* checkbox.changed(myCheckedEvent);
* }
*
* function myCheckedEvent() {
* if (this.checked()) {
* console.log('Checking!');
* } else {
* console.log('Unchecking!');
* }
* }
* </code></div>
*/
p5.prototype.createCheckbox = function() {
p5._validateParameters('createCheckbox', arguments);
var elt = document.createElement('div');
var checkbox = document.createElement('input');
checkbox.type = 'checkbox';
elt.appendChild(checkbox);
//checkbox must be wrapped in p5.Element before label so that label appears after
var self = addElement(elt, this);
self.checked = function() {
var cb = self.elt.getElementsByTagName('input')[0];
if (cb) {
if (arguments.length === 0) {
return cb.checked;
} else if (arguments[0]) {
cb.checked = true;
} else {
cb.checked = false;
}
}
return self;
};
this.value = function(val) {
self.value = val;
return this;
};
if (arguments[0]) {
var ran = Math.random()
.toString(36)
.slice(2);
var label = document.createElement('label');
checkbox.setAttribute('id', ran);
label.htmlFor = ran;
self.value(arguments[0]);
label.appendChild(document.createTextNode(arguments[0]));
elt.appendChild(label);
}
if (arguments[1]) {
checkbox.checked = true;
}
return self;
};
/**
* Creates a dropdown menu &lt;select&gt;&lt;/select&gt; element in the DOM.
* It also helps to assign select-box methods to p5.Element when selecting existing select box
* @method createSelect
* @param {boolean} [multiple] true if dropdown should support multiple selections
* @return {p5.Element}
* @example
* <div><code>
* var sel;
*
* function setup() {
* textAlign(CENTER);
* background(200);
* sel = createSelect();
* sel.position(10, 10);
* sel.option('pear');
* sel.option('kiwi');
* sel.option('grape');
* sel.changed(mySelectEvent);
* }
*
* function mySelectEvent() {
* var item = sel.value();
* background(200);
* text('it is a' + item + '!', 50, 50);
* }
* </code></div>
*/
/**
* @method createSelect
* @param {Object} existing DOM select element
* @return {p5.Element}
*/
p5.prototype.createSelect = function() {
p5._validateParameters('createSelect', arguments);
var elt, self;
var arg = arguments[0];
if (typeof arg === 'object' && arg.elt.nodeName === 'SELECT') {
self = arg;
elt = this.elt = arg.elt;
} else {
elt = document.createElement('select');
if (arg && typeof arg === 'boolean') {
elt.setAttribute('multiple', 'true');
}
self = addElement(elt, this);
}
self.option = function(name, value) {
var index;
//see if there is already an option with this name
for (var i = 0; i < this.elt.length; i++) {
if (this.elt[i].innerHTML === name) {
index = i;
break;
}
}
//if there is an option with this name we will modify it
if (index !== undefined) {
//if the user passed in false then delete that option
if (value === false) {
this.elt.remove(index);
} else {
//otherwise if the name and value are the same then change both
if (this.elt[index].innerHTML === this.elt[index].value) {
this.elt[index].innerHTML = this.elt[index].value = value;
//otherwise just change the value
} else {
this.elt[index].value = value;
}
}
} else {
//if it doesn't exist make it
var opt = document.createElement('option');
opt.innerHTML = name;
if (arguments.length > 1) opt.value = value;
else opt.value = name;
elt.appendChild(opt);
}
};
self.selected = function(value) {
var arr = [],
i;
if (arguments.length > 0) {
for (i = 0; i < this.elt.length; i++) {
if (value.toString() === this.elt[i].value) {
this.elt.selectedIndex = i;
}
}
return this;
} else {
if (this.elt.getAttribute('multiple')) {
for (i = 0; i < this.elt.selectedOptions.length; i++) {
arr.push(this.elt.selectedOptions[i].value);
}
return arr;
} else {
return this.elt.value;
}
}
};
return self;
};
/**
* Creates a radio button &lt;input&gt;&lt;/input&gt; element in the DOM.
* The .option() method can be used to set options for the radio after it is
* created. The .value() method will return the currently selected option.
*
* @method createRadio
* @param {String} [divId] the id and name of the created div and input field respectively
* @return {Object|p5.Element} pointer to p5.Element holding created node
* @example
* <div><code>
* var radio;
*
* function setup() {
* radio = createRadio();
* radio.option('black');
* radio.option('white');
* radio.option('gray');
* radio.style('width', '60px');
* textAlign(CENTER);
* fill(255, 0, 0);
* }
*
* function draw() {
* var val = radio.value();
* background(val);
* text(val, width / 2, height / 2);
* }
* </code></div>
* <div><code>
* var radio;
*
* function setup() {
* radio = createRadio();
* radio.option('apple', 1);
* radio.option('bread', 2);
* radio.option('juice', 3);
* radio.style('width', '60px');
* textAlign(CENTER);
* }
*
* function draw() {
* background(200);
* var val = radio.value();
* if (val) {
* text('item cost is $' + val, width / 2, height / 2);
* }
* }
* </code></div>
*/
p5.prototype.createRadio = function(existing_radios) {
p5._validateParameters('createRadio', arguments);
// do some prep by counting number of radios on page
var radios = document.querySelectorAll('input[type=radio]');
var count = 0;
if (radios.length > 1) {
var length = radios.length;
var prev = radios[0].name;
var current = radios[1].name;
count = 1;
for (var i = 1; i < length; i++) {
current = radios[i].name;
if (prev !== current) {
count++;
}
prev = current;
}
} else if (radios.length === 1) {
count = 1;
}
// see if we got an existing set of radios from callee
var elt, self;
if (typeof existing_radios === 'object') {
// use existing elements
self = existing_radios;
elt = this.elt = existing_radios.elt;
} else {
// create a set of radio buttons
elt = document.createElement('div');
self = addElement(elt, this);
}
// setup member functions
self._getInputChildrenArray = function() {
return Array.prototype.slice.call(this.elt.children).filter(function(c) {
return c.tagName === 'INPUT';
});
};
var times = -1;
self.option = function(name, value) {
var opt = document.createElement('input');
opt.type = 'radio';
opt.innerHTML = name;
if (value) opt.value = value;
else opt.value = name;
opt.setAttribute('name', 'defaultradio' + count);
elt.appendChild(opt);
if (name) {
times++;
var label = document.createElement('label');
opt.setAttribute('id', 'defaultradio' + count + '-' + times);
label.htmlFor = 'defaultradio' + count + '-' + times;
label.appendChild(document.createTextNode(name));
elt.appendChild(label);
}
return opt;
};
self.selected = function(value) {
var i;
var inputChildren = self._getInputChildrenArray();
if (value) {
for (i = 0; i < inputChildren.length; i++) {
if (inputChildren[i].value === value) inputChildren[i].checked = true;
}
return this;
} else {
for (i = 0; i < inputChildren.length; i++) {
if (inputChildren[i].checked === true) return inputChildren[i].value;
}
}
};
self.value = function(value) {
var i;
var inputChildren = self._getInputChildrenArray();
if (value) {
for (i = 0; i < inputChildren.length; i++) {
if (inputChildren[i].value === value) inputChildren[i].checked = true;
}
return this;
} else {
for (i = 0; i < inputChildren.length; i++) {
if (inputChildren[i].checked === true) return inputChildren[i].value;
}
return '';
}
};
return self;
};
/**
* Creates an &lt;input&gt;&lt;/input&gt; element in the DOM for text input.
* Use .size() to set the display length of the box.
* Appends to the container node if one is specified, otherwise
* appends to body.
*
* @method createInput
* @param {String} [value] default value of the input box
* @param {String} [type] type of text, ie text, password etc. Defaults to text
* @return {Object|p5.Element} pointer to p5.Element holding created node
* @example
* <div class='norender'><code>
* function setup() {
* var inp = createInput('');
* inp.input(myInputEvent);
* }
*
* function myInputEvent() {
* console.log('you are typing: ', this.value());
* }
* </code></div>
*/
p5.prototype.createInput = function(value, type) {
p5._validateParameters('createInput', arguments);
var elt = document.createElement('input');
elt.type = type ? type : 'text';
if (value) elt.value = value;
return addElement(elt, this);
};
/**
* Creates an &lt;input&gt;&lt;/input&gt; element in the DOM of type 'file'.
* This allows users to select local files for use in a sketch.
*
* @method createFileInput
* @param {Function} [callback] callback function for when a file loaded
* @param {String} [multiple] optional to allow multiple files selected
* @return {Object|p5.Element} pointer to p5.Element holding created DOM element
* @example
* var input;
* var img;
*
* function setup() {
* input = createFileInput(handleFile);
* input.position(0, 0);
* }
*
* function draw() {
* if (img) {
* image(img, 0, 0, width, height);
* }
* }
*
* function handleFile(file) {
* print(file);
* if (file.type === 'image') {
* img = createImg(file.data);
* img.hide();
* }
* }
*/
p5.prototype.createFileInput = function(callback, multiple) {
p5._validateParameters('createFileInput', arguments);
// Function to handle when a file is selected
// We're simplifying life and assuming that we always
// want to load every selected file
function handleFileSelect(evt) {
function makeLoader(theFile) {
// Making a p5.File object
var p5file = new p5.File(theFile);
return function(e) {
p5file.data = e.target.result;
callback(p5file);
};
}
// These are the files
var files = evt.target.files;
// Load each one and trigger a callback
for (var i = 0; i < files.length; i++) {
var f = files[i];
var reader = new FileReader();
reader.onload = makeLoader(f);
// Text or data?
// This should likely be improved
if (f.type.indexOf('text') > -1) {
reader.readAsText(f);
} else {
reader.readAsDataURL(f);
}
}
}
// Is the file stuff supported?
if (window.File && window.FileReader && window.FileList && window.Blob) {
// Yup, we're ok and make an input file selector
var elt = document.createElement('input');
elt.type = 'file';
// If we get a second argument that evaluates to true
// then we are looking for multiple files
if (multiple) {
// Anything gets the job done
elt.multiple = 'multiple';
}
// Now let's handle when a file was selected
elt.addEventListener('change', handleFileSelect, false);
return addElement(elt, this);
} else {
console.log(
'The File APIs are not fully supported in this browser. Cannot create element.'
);
}
};
/** VIDEO STUFF **/
function createMedia(pInst, type, src, callback) {
var elt = document.createElement(type);
// allow src to be empty
src = src || '';
if (typeof src === 'string') {
src = [src];
}
for (var i = 0; i < src.length; i++) {
var source = document.createElement('source');
source.src = src[i];
elt.appendChild(source);
}
if (typeof callback !== 'undefined') {
var callbackHandler = function() {
callback();
elt.removeEventListener('canplaythrough', callbackHandler);
};
elt.addEventListener('canplaythrough', callbackHandler);
}
var c = addElement(elt, pInst, true);
c.loadedmetadata = false;
// set width and height onload metadata
elt.addEventListener('loadedmetadata', function() {
c.width = elt.videoWidth;
c.height = elt.videoHeight;
// set elt width and height if not set
if (c.elt.width === 0) c.elt.width = elt.videoWidth;
if (c.elt.height === 0) c.elt.height = elt.videoHeight;
c.loadedmetadata = true;
});
return c;
}
/**
* Creates an HTML5 &lt;video&gt; element in the DOM for simple playback
* of audio/video. Shown by default, can be hidden with .hide()
* and drawn into canvas using video(). Appends to the container
* node if one is specified, otherwise appends to body. The first parameter
* can be either a single string path to a video file, or an array of string
* paths to different formats of the same video. This is useful for ensuring
* that your video can play across different browsers, as each supports
* different formats. See <a href='https://developer.mozilla.org/en-US/docs/Web/HTML/Supported_media_formats'>this
* page</a> for further information about supported formats.
*
* @method createVideo
* @param {String|Array} src path to a video file, or array of paths for
* supporting different browsers
* @param {Object} [callback] callback function to be called upon
* 'canplaythrough' event fire, that is, when the
* browser can play the media, and estimates that
* enough data has been loaded to play the media
* up to its end without having to stop for
* further buffering of content
* @return {p5.MediaElement|p5.Element} pointer to video p5.Element
* @example
* <div><code>
* var vid;
* function setup() {
* vid = createVideo(['small.mp4', 'small.ogv', 'small.webm'], vidLoad);
* }
*
* // This function is called when the video loads
* function vidLoad() {
* vid.play();
* }
* </code></div>
*/
p5.prototype.createVideo = function(src, callback) {
p5._validateParameters('createVideo', arguments);
return createMedia(this, 'video', src, callback);
};
/** AUDIO STUFF **/
/**
* Creates a hidden HTML5 &lt;audio&gt; element in the DOM for simple audio
* playback. Appends to the container node if one is specified,
* otherwise appends to body. The first parameter
* can be either a single string path to a audio file, or an array of string
* paths to different formats of the same audio. This is useful for ensuring
* that your audio can play across different browsers, as each supports
* different formats. See <a href='https://developer.mozilla.org/en-US/docs/Web/HTML/Supported_media_formats'>this
* page for further information about supported formats</a>.
*
* @method createAudio
* @param {String|String[]} [src] path to an audio file, or array of paths
* for supporting different browsers
* @param {Object} [callback] callback function to be called upon
* 'canplaythrough' event fire, that is, when the
* browser can play the media, and estimates that
* enough data has been loaded to play the media
* up to its end without having to stop for
* further buffering of content
* @return {p5.MediaElement|p5.Element} pointer to audio p5.Element /**
* @example
* <div><code>
* var ele;
* function setup() {
* ele = createAudio('assets/beat.mp3');
*
* // here we set the element to autoplay
* // The element will play as soon
* // as it is able to do so.
* ele.autoplay(true);
* }
* </code></div>
*/
p5.prototype.createAudio = function(src, callback) {
p5._validateParameters('createAudio', arguments);
return createMedia(this, 'audio', src, callback);
};
/** CAMERA STUFF **/
p5.prototype.VIDEO = 'video';
p5.prototype.AUDIO = 'audio';
// from: https://developer.mozilla.org/en-US/docs/Web/API/MediaDevices/getUserMedia
// Older browsers might not implement mediaDevices at all, so we set an empty object first
if (navigator.mediaDevices === undefined) {
navigator.mediaDevices = {};
}
// Some browsers partially implement mediaDevices. We can't just assign an object
// with getUserMedia as it would overwrite existing properties.
// Here, we will just add the getUserMedia property if it's missing.
if (navigator.mediaDevices.getUserMedia === undefined) {
navigator.mediaDevices.getUserMedia = function(constraints) {
// First get ahold of the legacy getUserMedia, if present
var getUserMedia =
navigator.webkitGetUserMedia || navigator.mozGetUserMedia;
// Some browsers just don't implement it - return a rejected promise with an error
// to keep a consistent interface
if (!getUserMedia) {
return Promise.reject(
new Error('getUserMedia is not implemented in this browser')
);
}
// Otherwise, wrap the call to the old navigator.getUserMedia with a Promise
return new Promise(function(resolve, reject) {
getUserMedia.call(navigator, constraints, resolve, reject);
});
};
}
/**
* <p>Creates a new HTML5 &lt;video&gt; element that contains the audio/video
* feed from a webcam. The element is separate from the canvas and is
* displayed by default. The element can be hidden using .hide(). The feed
* can be drawn onto the canvas using image().</p>
* <p>More specific properties of the feed can be passing in a Constraints object.
* See the
* <a href='http://w3c.github.io/mediacapture-main/getusermedia.html#media-track-constraints'> W3C
* spec</a> for possible properties. Note that not all of these are supported
* by all browsers.</p>
* <p>Security note: A new browser security specification requires that getUserMedia,
* which is behind createCapture(), only works when you're running the code locally,
* or on HTTPS. Learn more <a href='http://stackoverflow.com/questions/34197653/getusermedia-in-chrome-47-without-using-https'>here</a>
* and <a href='https://developer.mozilla.org/en-US/docs/Web/API/MediaDevices/getUserMedia'>here</a>.</p>
*
* @method createCapture
* @param {String|Constant|Object} type type of capture, either VIDEO or
* AUDIO if none specified, default both,
* or a Constraints object
* @param {Function} callback function to be called once
* stream has loaded
* @return {Object|p5.Element} capture video p5.Element
* @example
* <div class='norender notest'><code>
* var capture;
*
* function setup() {
* createCanvas(480, 480);
* capture = createCapture(VIDEO);
* capture.hide();
* }
*
* function draw() {
* image(capture, 0, 0, width, width * capture.height / capture.width);
* filter(INVERT);
* }
* </code></div>
* <div class='norender notest'><code>
* function setup() {
* createCanvas(480, 120);
* var constraints = {
* video: {
* mandatory: {
* minWidth: 1280,
* minHeight: 720
* },
* optional: [{ maxFrameRate: 10 }]
* },
* audio: true
* };
* createCapture(constraints, function(stream) {
* console.log(stream);
* });
* }
* </code></div>
*/
p5.prototype.createCapture = function() {
p5._validateParameters('createCapture', arguments);
var useVideo = true;
var useAudio = true;
var constraints;
var cb;
for (var i = 0; i < arguments.length; i++) {
if (arguments[i] === p5.prototype.VIDEO) {
useAudio = false;
} else if (arguments[i] === p5.prototype.AUDIO) {
useVideo = false;
} else if (typeof arguments[i] === 'object') {
constraints = arguments[i];
} else if (typeof arguments[i] === 'function') {
cb = arguments[i];
}
}
if (navigator.getUserMedia) {
var elt = document.createElement('video');
if (!constraints) {
constraints = { video: useVideo, audio: useAudio };
}
navigator.mediaDevices.getUserMedia(constraints).then(
function(stream) {
try {
if ('srcObject' in elt) {
elt.srcObject = stream;
} else {
elt.src = window.URL.createObjectURL(stream);
}
} catch (err) {
elt.src = stream;
}
if (cb) {
cb(stream);
}
},
function(e) {
console.log(e);
}
);
} else {
throw 'getUserMedia not supported in this browser';
}
var c = addElement(elt, this, true);
c.loadedmetadata = false;
// set width and height onload metadata
elt.addEventListener('loadedmetadata', function() {
elt.play();
if (elt.width) {
c.width = elt.videoWidth = elt.width;
c.height = elt.videoHeight = elt.height;
} else {
c.width = c.elt.width = elt.videoWidth;
c.height = c.elt.height = elt.videoHeight;
}
c.loadedmetadata = true;
});
return c;
};
/**
* Creates element with given tag in the DOM with given content.
* Appends to the container node if one is specified, otherwise
* appends to body.
*
* @method createElement
* @param {String} tag tag for the new element
* @param {String} [content] html content to be inserted into the element
* @return {Object|p5.Element} pointer to p5.Element holding created node
* @example
* <div class='norender'><code>
* createElement('h2', 'im an h2 p5.element!');
* </code></div>
*/
p5.prototype.createElement = function(tag, content) {
p5._validateParameters('createElement', arguments);
var elt = document.createElement(tag);
if (typeof content !== 'undefined') {
elt.innerHTML = content;
}
return addElement(elt, this);
};
// =============================================================================
// p5.Element additions
// =============================================================================
/**
*
* Adds specified class to the element.
*
* @for p5.Element
* @method addClass
* @param {String} class name of class to add
* @return {Object|p5.Element}
* @example
* <div class='norender'><code>
* var div = createDiv('div');
* div.addClass('myClass');
* </code></div>
*/
p5.Element.prototype.addClass = function(c) {
if (this.elt.className) {
// PEND don't add class more than once
//var regex = new RegExp('[^a-zA-Z\d:]?'+c+'[^a-zA-Z\d:]?');
//if (this.elt.className.search(/[^a-zA-Z\d:]?hi[^a-zA-Z\d:]?/) === -1) {
this.elt.className = this.elt.className + ' ' + c;
//}
} else {
this.elt.className = c;
}
return this;
};
/**
*
* Removes specified class from the element.
*
* @method removeClass
* @param {String} class name of class to remove
* @return {Object|p5.Element} * @example
* <div class='norender'><code>
* // In this example, a class is set when the div is created
* // and removed when mouse is pressed. This could link up
* // with a CSS style rule to toggle style properties.
*
* var div;
*
* function setup() {
* div = createDiv('div');
* div.addClass('myClass');
* }
*
* function mousePressed() {
* div.removeClass('myClass');
* }
* </code></div>
*/
p5.Element.prototype.removeClass = function(c) {
var regex = new RegExp('(?:^|\\s)' + c + '(?!\\S)');
this.elt.className = this.elt.className.replace(regex, '');
this.elt.className = this.elt.className.replace(/^\s+|\s+$/g, ''); //prettify (optional)
return this;
};
/**
*
* Attaches the element as a child to the parent specified.
* Accepts either a string ID, DOM node, or p5.Element.
* If no argument is specified, an array of children DOM nodes is returned.
*
* @method child
* @param {String|Object|p5.Element} [child] the ID, DOM node, or p5.Element
* to add to the current element
* @return {p5.Element}
* @example
* <div class='norender'><code>
* var div0 = createDiv('this is the parent');
* var div1 = createDiv('this is the child');
* div0.child(div1); // use p5.Element
* </code></div>
* <div class='norender'><code>
* var div0 = createDiv('this is the parent');
* var div1 = createDiv('this is the child');
* div1.id('apples');
* div0.child('apples'); // use id
* </code></div>
* <div class='norender notest'><code>
* var div0 = createDiv('this is the parent');
* var elt = document.getElementById('myChildDiv');
* div0.child(elt); // use element from page
* </code></div>
*/
p5.Element.prototype.child = function(c) {
if (typeof c === 'undefined') {
return this.elt.childNodes;
}
if (typeof c === 'string') {
if (c[0] === '#') {
c = c.substring(1);
}
c = document.getElementById(c);
} else if (c instanceof p5.Element) {
c = c.elt;
}
this.elt.appendChild(c);
return this;
};
/**
* Centers a p5 Element either vertically, horizontally,
* or both, relative to its parent or according to
* the body if the Element has no parent. If no argument is passed
* the Element is aligned both vertically and horizontally.
*
* @method center
* @param {String} [align] passing 'vertical', 'horizontal' aligns element accordingly
* @return {Object|p5.Element} pointer to p5.Element
* @example
* <div><code>
* function setup() {
* var div = createDiv('').size(10, 10);
* div.style('background-color', 'orange');
* div.center();
* }
* </code></div>
*/
p5.Element.prototype.center = function(align) {
var style = this.elt.style.display;
var hidden = this.elt.style.display === 'none';
var parentHidden = this.parent().style.display === 'none';
var pos = { x: this.elt.offsetLeft, y: this.elt.offsetTop };
if (hidden) this.show();
this.elt.style.display = 'block';
this.position(0, 0);
if (parentHidden) this.parent().style.display = 'block';
var wOffset = Math.abs(this.parent().offsetWidth - this.elt.offsetWidth);
var hOffset = Math.abs(this.parent().offsetHeight - this.elt.offsetHeight);
var y = pos.y;
var x = pos.x;
if (align === 'both' || align === undefined) {
this.position(wOffset / 2, hOffset / 2);
} else if (align === 'horizontal') {
this.position(wOffset / 2, y);
} else if (align === 'vertical') {
this.position(x, hOffset / 2);
}
this.style('display', style);
if (hidden) this.hide();
if (parentHidden) this.parent().style.display = 'none';
return this;
};
/**
*
* If an argument is given, sets the inner HTML of the element,
* replacing any existing html. If true is included as a second
* argument, html is appended instead of replacing existing html.
* If no arguments are given, returns
* the inner HTML of the element.
*
* @for p5.Element
* @method html
* @param {String} [html] the HTML to be placed inside the element
* @param {boolean} [append] whether to append HTML to existing
* @return {Object|p5.Element|String}
* @example
* <div class='norender'><code>
* var div = createDiv('').size(100, 100);
* div.html('hi');
* </code></div>
* <div class='norender'><code>
* var div = createDiv('Hello ').size(100, 100);
* div.html('World', true);
* </code></div>
*/
p5.Element.prototype.html = function() {
if (arguments.length === 0) {
return this.elt.innerHTML;
} else if (arguments[1]) {
this.elt.innerHTML += arguments[0];
return this;
} else {
this.elt.innerHTML = arguments[0];
return this;
}
};
/**
*
* Sets the position of the element relative to (0, 0) of the
* window. Essentially, sets position:absolute and left and top
* properties of style. If no arguments given returns the x and y position
* of the element in an object.
*
* @method position
* @param {Number} [x] x-position relative to upper left of window
* @param {Number} [y] y-position relative to upper left of window
* @return {Object|p5.Element}
* @example
* <div><code class='norender'>
* function setup() {
* var cnv = createCanvas(100, 100);
* // positions canvas 50px to the right and 100px
* // below upper left corner of the window
* cnv.position(50, 100);
* }
* </code></div>
*/
p5.Element.prototype.position = function() {
if (arguments.length === 0) {
return { x: this.elt.offsetLeft, y: this.elt.offsetTop };
} else {
this.elt.style.position = 'absolute';
this.elt.style.left = arguments[0] + 'px';
this.elt.style.top = arguments[1] + 'px';
this.x = arguments[0];
this.y = arguments[1];
return this;
}
};
/* Helper method called by p5.Element.style() */
p5.Element.prototype._translate = function() {
this.elt.style.position = 'absolute';
// save out initial non-translate transform styling
var transform = '';
if (this.elt.style.transform) {
transform = this.elt.style.transform.replace(/translate3d\(.*\)/g, '');
transform = transform.replace(/translate[X-Z]?\(.*\)/g, '');
}
if (arguments.length === 2) {
this.elt.style.transform =
'translate(' + arguments[0] + 'px, ' + arguments[1] + 'px)';
} else if (arguments.length > 2) {
this.elt.style.transform =
'translate3d(' +
arguments[0] +
'px,' +
arguments[1] +
'px,' +
arguments[2] +
'px)';
if (arguments.length === 3) {
this.elt.parentElement.style.perspective = '1000px';
} else {
this.elt.parentElement.style.perspective = arguments[3] + 'px';
}
}
// add any extra transform styling back on end
this.elt.style.transform += transform;
return this;
};
/* Helper method called by p5.Element.style() */
p5.Element.prototype._rotate = function() {
// save out initial non-rotate transform styling
var transform = '';
if (this.elt.style.transform) {
transform = this.elt.style.transform.replace(/rotate3d\(.*\)/g, '');
transform = transform.replace(/rotate[X-Z]?\(.*\)/g, '');
}
if (arguments.length === 1) {
this.elt.style.transform = 'rotate(' + arguments[0] + 'deg)';
} else if (arguments.length === 2) {
this.elt.style.transform =
'rotate(' + arguments[0] + 'deg, ' + arguments[1] + 'deg)';
} else if (arguments.length === 3) {
this.elt.style.transform = 'rotateX(' + arguments[0] + 'deg)';
this.elt.style.transform += 'rotateY(' + arguments[1] + 'deg)';
this.elt.style.transform += 'rotateZ(' + arguments[2] + 'deg)';
}
// add remaining transform back on
this.elt.style.transform += transform;
return this;
};
/**
* Sets the given style (css) property (1st arg) of the element with the
* given value (2nd arg). If a single argument is given, .style()
* returns the value of the given property; however, if the single argument
* is given in css syntax ('text-align:center'), .style() sets the css
* appropriatly. .style() also handles 2d and 3d css transforms. If
* the 1st arg is 'rotate', 'translate', or 'position', the following arguments
* accept Numbers as values. ('translate', 10, 100, 50);
*
* @method style
* @param {String} property property to be set
* @param {String|Number|p5.Color} [value] value to assign to property (only String|Number for rotate/translate)
* @param {String|Number|p5.Color} [value2] position can take a 2nd value
* @param {String|Number|p5.Color} [value3] translate can take a 2nd & 3rd value
* @return {String|Object|p5.Element} value of property, if no value is specified
* or p5.Element
* @example
* <div><code class='norender'>
* var myDiv = createDiv('I like pandas.');
* myDiv.style('font-size', '18px');
* myDiv.style('color', '#ff0000');
* </code></div>
* <div><code class='norender'>
* var col = color(25, 23, 200, 50);
* var button = createButton('button');
* button.style('background-color', col);
* button.position(10, 10);
* </code></div>
* <div><code class='norender'>
* var myDiv = createDiv('I like lizards.');
* myDiv.style('position', 20, 20);
* myDiv.style('rotate', 45);
* </code></div>
* <div><code class='norender'>
* var myDiv;
* function setup() {
* background(200);
* myDiv = createDiv('I like gray.');
* myDiv.position(20, 20);
* }
*
* function draw() {
* myDiv.style('font-size', mouseX + 'px');
* }
* </code></div>
*/
p5.Element.prototype.style = function(prop, val) {
var self = this;
if (val instanceof p5.Color) {
val =
'rgba(' +
val.levels[0] +
',' +
val.levels[1] +
',' +
val.levels[2] +
',' +
val.levels[3] / 255 +
')';
}
if (typeof val === 'undefined') {
if (prop.indexOf(':') === -1) {
var styles = window.getComputedStyle(self.elt);
var style = styles.getPropertyValue(prop);
return style;
} else {
var attrs = prop.split(';');
for (var i = 0; i < attrs.length; i++) {
var parts = attrs[i].split(':');
if (parts[0] && parts[1]) {
this.elt.style[parts[0].trim()] = parts[1].trim();
}
}
}
} else {
if (prop === 'rotate' || prop === 'translate' || prop === 'position') {
var trans = Array.prototype.shift.apply(arguments);
var f = this[trans] || this['_' + trans];
f.apply(this, arguments);
} else {
this.elt.style[prop] = val;
if (
prop === 'width' ||
prop === 'height' ||
prop === 'left' ||
prop === 'top'
) {
var numVal = val.replace(/\D+/g, '');
this[prop] = parseInt(numVal, 10); // pend: is this necessary?
}
}
}
return this;
};
/**
*
* Adds a new attribute or changes the value of an existing attribute
* on the specified element. If no value is specified, returns the
* value of the given attribute, or null if attribute is not set.
*
* @method attribute
* @param {String} attr attribute to set
* @param {String} [value] value to assign to attribute
* @return {String|Object|p5.Element} value of attribute, if no value is
* specified or p5.Element
* @example
* <div class='norender'><code>
* var myDiv = createDiv('I like pandas.');
* myDiv.attribute('align', 'center');
* </code></div>
*/
p5.Element.prototype.attribute = function(attr, value) {
//handling for checkboxes and radios to ensure options get
//attributes not divs
if (
this.elt.firstChild != null &&
(this.elt.firstChild.type === 'checkbox' ||
this.elt.firstChild.type === 'radio')
) {
if (typeof value === 'undefined') {
return this.elt.firstChild.getAttribute(attr);
} else {
for (var i = 0; i < this.elt.childNodes.length; i++) {
this.elt.childNodes[i].setAttribute(attr, value);
}
}
} else if (typeof value === 'undefined') {
return this.elt.getAttribute(attr);
} else {
this.elt.setAttribute(attr, value);
return this;
}
};
/**
*
* Removes an attribute on the specified element.
*
* @method removeAttribute
* @param {String} attr attribute to remove
* @return {Object|p5.Element}
*
* @example
* <div><code>
* var button;
* var checkbox;
*
* function setup() {
* checkbox = createCheckbox('enable', true);
* checkbox.changed(enableButton);
* button = createButton('button');
* button.position(10, 10);
* }
*
* function enableButton() {
* if (this.checked()) {
* // Re-enable the button
* button.removeAttribute('disabled');
* } else {
* // Disable the button
* button.attribute('disabled', '');
* }
* }
* </code></div>
*/
p5.Element.prototype.removeAttribute = function(attr) {
if (
this.elt.firstChild != null &&
(this.elt.firstChild.type === 'checkbox' ||
this.elt.firstChild.type === 'radio')
) {
for (var i = 0; i < this.elt.childNodes.length; i++) {
this.elt.childNodes[i].removeAttribute(attr);
}
}
this.elt.removeAttribute(attr);
return this;
};
/**
* Either returns the value of the element if no arguments
* given, or sets the value of the element.
*
* @method value
* @param {String|Number} [value]
* @return {String|Object|p5.Element} value of element if no value is specified or p5.Element
* @example
* <div class='norender'><code>
* // gets the value
* var inp;
* function setup() {
* inp = createInput('');
* }
*
* function mousePressed() {
* print(inp.value());
* }
* </code></div>
* <div class='norender'><code>
* // sets the value
* var inp;
* function setup() {
* inp = createInput('myValue');
* }
*
* function mousePressed() {
* inp.value('myValue');
* }
* </code></div>
*/
p5.Element.prototype.value = function() {
if (arguments.length > 0) {
this.elt.value = arguments[0];
return this;
} else {
if (this.elt.type === 'range') {
return parseFloat(this.elt.value);
} else return this.elt.value;
}
};
/**
*
* Shows the current element. Essentially, setting display:block for the style.
*
* @method show
* @return {Object|p5.Element}
* @example
* <div class='norender'><code>
* var div = createDiv('div');
* div.style('display', 'none');
* div.show(); // turns display to block
* </code></div>
*/
p5.Element.prototype.show = function() {
this.elt.style.display = 'block';
return this;
};
/**
* Hides the current element. Essentially, setting display:none for the style.
*
* @method hide
* @return {Object|p5.Element}
* @example
* <div class='norender'><code>
* var div = createDiv('this is a div');
* div.hide();
* </code></div>
*/
p5.Element.prototype.hide = function() {
this.elt.style.display = 'none';
return this;
};
/**
*
* Sets the width and height of the element. AUTO can be used to
* only adjust one dimension. If no arguments given returns the width and height
* of the element in an object.
*
* @method size
* @param {Number|Constant} [w] width of the element, either AUTO, or a number
* @param {Number|Constant} [h] height of the element, either AUTO, or a number
* @return {Object|p5.Element}
* @example
* <div class='norender'><code>
* var div = createDiv('this is a div');
* div.size(100, 100);
* </code></div>
*/
p5.Element.prototype.size = function(w, h) {
if (arguments.length === 0) {
return { width: this.elt.offsetWidth, height: this.elt.offsetHeight };
} else {
var aW = w;
var aH = h;
var AUTO = p5.prototype.AUTO;
if (aW !== AUTO || aH !== AUTO) {
if (aW === AUTO) {
aW = h * this.width / this.height;
} else if (aH === AUTO) {
aH = w * this.height / this.width;
}
// set diff for cnv vs normal div
if (this.elt instanceof HTMLCanvasElement) {
var j = {};
var k = this.elt.getContext('2d');
var prop;
for (prop in k) {
j[prop] = k[prop];
}
this.elt.setAttribute('width', aW * this._pInst._pixelDensity);
this.elt.setAttribute('height', aH * this._pInst._pixelDensity);
this.elt.setAttribute(
'style',
'width:' + aW + 'px; height:' + aH + 'px'
);
this._pInst.scale(
this._pInst._pixelDensity,
this._pInst._pixelDensity
);
for (prop in j) {
this.elt.getContext('2d')[prop] = j[prop];
}
} else {
this.elt.style.width = aW + 'px';
this.elt.style.height = aH + 'px';
this.elt.width = aW;
this.elt.height = aH;
this.width = aW;
this.height = aH;
}
this.width = this.elt.offsetWidth;
this.height = this.elt.offsetHeight;
if (this._pInst) {
// main canvas associated with p5 instance
if (this._pInst._curElement.elt === this.elt) {
this._pInst._setProperty('width', this.elt.offsetWidth);
this._pInst._setProperty('height', this.elt.offsetHeight);
}
}
}
return this;
}
};
/**
* Removes the element and deregisters all listeners.
* @method remove
* @example
* <div class='norender'><code>
* var myDiv = createDiv('this is some text');
* myDiv.remove();
* </code></div>
*/
p5.Element.prototype.remove = function() {
// deregister events
for (var ev in this._events) {
this.elt.removeEventListener(ev, this._events[ev]);
}
if (this.elt.parentNode) {
this.elt.parentNode.removeChild(this.elt);
}
delete this;
};
// =============================================================================
// p5.MediaElement additions
// =============================================================================
/**
* Extends p5.Element to handle audio and video. In addition to the methods
* of p5.Element, it also contains methods for controlling media. It is not
* called directly, but p5.MediaElements are created by calling createVideo,
* createAudio, and createCapture.
*
* @class p5.MediaElement
* @constructor
* @param {String} elt DOM node that is wrapped
*/
p5.MediaElement = function(elt, pInst) {
p5.Element.call(this, elt, pInst);
var self = this;
this.elt.crossOrigin = 'anonymous';
this._prevTime = 0;
this._cueIDCounter = 0;
this._cues = [];
this._pixelDensity = 1;
this._modified = false;
/**
* Path to the media element source.
*
* @property src
* @return {String} src
* @example
* <div><code>
* var ele;
*
* function setup() {
* background(250);
*
* //p5.MediaElement objects are usually created
* //by calling the createAudio(), createVideo(),
* //and createCapture() functions.
*
* //In this example we create
* //a new p5.MediaElement via createAudio().
* ele = createAudio('assets/beat.mp3');
*
* //We'll set up our example so that
* //when you click on the text,
* //an alert box displays the MediaElement's
* //src field.
* textAlign(CENTER);
* text('Click Me!', width / 2, height / 2);
* }
*
* function mouseClicked() {
* //here we test if the mouse is over the
* //canvas element when it's clicked
* if (mouseX >= 0 && mouseX <= width && mouseY >= 0 && mouseY <= height) {
* //Show our p5.MediaElement's src field
* alert(ele.src);
* }
* }
* </code></div>
*/
Object.defineProperty(self, 'src', {
get: function() {
var firstChildSrc = self.elt.children[0].src;
var srcVal = self.elt.src === window.location.href ? '' : self.elt.src;
var ret =
firstChildSrc === window.location.href ? srcVal : firstChildSrc;
return ret;
},
set: function(newValue) {
for (var i = 0; i < self.elt.children.length; i++) {
self.elt.removeChild(self.elt.children[i]);
}
var source = document.createElement('source');
source.src = newValue;
elt.appendChild(source);
self.elt.src = newValue;
self.modified = true;
}
});
// private _onended callback, set by the method: onended(callback)
self._onended = function() {};
self.elt.onended = function() {
self._onended(self);
};
};
p5.MediaElement.prototype = Object.create(p5.Element.prototype);
/**
* Play an HTML5 media element.
*
* @method play
* @return {Object|p5.Element}
* @example
* <div><code>
* var ele;
*
* function setup() {
* //p5.MediaElement objects are usually created
* //by calling the createAudio(), createVideo(),
* //and createCapture() functions.
*
* //In this example we create
* //a new p5.MediaElement via createAudio().
* ele = createAudio('assets/beat.mp3');
*
* background(250);
* textAlign(CENTER);
* text('Click to Play!', width / 2, height / 2);
* }
*
* function mouseClicked() {
* //here we test if the mouse is over the
* //canvas element when it's clicked
* if (mouseX >= 0 && mouseX <= width && mouseY >= 0 && mouseY <= height) {
* //Here we call the play() function on
* //the p5.MediaElement we created above.
* //This will start the audio sample.
* ele.play();
*
* background(200);
* text('You clicked Play!', width / 2, height / 2);
* }
* }
* </code></div>
*/
p5.MediaElement.prototype.play = function() {
if (this.elt.currentTime === this.elt.duration) {
this.elt.currentTime = 0;
}
if (this.elt.readyState > 1) {
this.elt.play();
} else {
// in Chrome, playback cannot resume after being stopped and must reload
this.elt.load();
this.elt.play();
}
return this;
};
/**
* Stops an HTML5 media element (sets current time to zero).
*
* @method stop
* @return {Object|p5.Element}
* @example
* <div><code>
* //This example both starts
* //and stops a sound sample
* //when the user clicks the canvas
*
* //We will store the p5.MediaElement
* //object in here
* var ele;
*
* //while our audio is playing,
* //this will be set to true
* var sampleIsPlaying = false;
*
* function setup() {
* //Here we create a p5.MediaElement object
* //using the createAudio() function.
* ele = createAudio('assets/beat.mp3');
* background(200);
* textAlign(CENTER);
* text('Click to play!', width / 2, height / 2);
* }
*
* function mouseClicked() {
* //here we test if the mouse is over the
* //canvas element when it's clicked
* if (mouseX >= 0 && mouseX <= width && mouseY >= 0 && mouseY <= height) {
* background(200);
*
* if (sampleIsPlaying) {
* //if the sample is currently playing
* //calling the stop() function on
* //our p5.MediaElement will stop
* //it and reset its current
* //time to 0 (i.e. it will start
* //at the beginning the next time
* //you play it)
* ele.stop();
*
* sampleIsPlaying = false;
* text('Click to play!', width / 2, height / 2);
* } else {
* //loop our sound element until we
* //call ele.stop() on it.
* ele.loop();
*
* sampleIsPlaying = true;
* text('Click to stop!', width / 2, height / 2);
* }
* }
* }
* </code></div>
*/
p5.MediaElement.prototype.stop = function() {
this.elt.pause();
this.elt.currentTime = 0;
return this;
};
/**
* Pauses an HTML5 media element.
*
* @method pause
* @return {Object|p5.Element}
* @example
* <div><code>
* //This example both starts
* //and pauses a sound sample
* //when the user clicks the canvas
*
* //We will store the p5.MediaElement
* //object in here
* var ele;
*
* //while our audio is playing,
* //this will be set to true
* var sampleIsPlaying = false;
*
* function setup() {
* //Here we create a p5.MediaElement object
* //using the createAudio() function.
* ele = createAudio('assets/lucky_dragons.mp3');
* background(200);
* textAlign(CENTER);
* text('Click to play!', width / 2, height / 2);
* }
*
* function mouseClicked() {
* //here we test if the mouse is over the
* //canvas element when it's clicked
* if (mouseX >= 0 && mouseX <= width && mouseY >= 0 && mouseY <= height) {
* background(200);
*
* if (sampleIsPlaying) {
* //Calling pause() on our
* //p5.MediaElement will stop it
* //playing, but when we call the
* //loop() or play() functions
* //the sample will start from
* //where we paused it.
* ele.pause();
*
* sampleIsPlaying = false;
* text('Click to resume!', width / 2, height / 2);
* } else {
* //loop our sound element until we
* //call ele.pause() on it.
* ele.loop();
*
* sampleIsPlaying = true;
* text('Click to pause!', width / 2, height / 2);
* }
* }
* }
* </code></div>
*/
p5.MediaElement.prototype.pause = function() {
this.elt.pause();
return this;
};
/**
* Set 'loop' to true for an HTML5 media element, and starts playing.
*
* @method loop
* @return {Object|p5.Element}
* @example
* <div><code>
* //Clicking the canvas will loop
* //the audio sample until the user
* //clicks again to stop it
*
* //We will store the p5.MediaElement
* //object in here
* var ele;
*
* //while our audio is playing,
* //this will be set to true
* var sampleIsLooping = false;
*
* function setup() {
* //Here we create a p5.MediaElement object
* //using the createAudio() function.
* ele = createAudio('assets/lucky_dragons.mp3');
* background(200);
* textAlign(CENTER);
* text('Click to loop!', width / 2, height / 2);
* }
*
* function mouseClicked() {
* //here we test if the mouse is over the
* //canvas element when it's clicked
* if (mouseX >= 0 && mouseX <= width && mouseY >= 0 && mouseY <= height) {
* background(200);
*
* if (!sampleIsLooping) {
* //loop our sound element until we
* //call ele.stop() on it.
* ele.loop();
*
* sampleIsLooping = true;
* text('Click to stop!', width / 2, height / 2);
* } else {
* ele.stop();
*
* sampleIsLooping = false;
* text('Click to loop!', width / 2, height / 2);
* }
* }
* }
* </code></div>
*/
p5.MediaElement.prototype.loop = function() {
this.elt.setAttribute('loop', true);
this.play();
return this;
};
/**
* Set 'loop' to false for an HTML5 media element. Element will stop
* when it reaches the end.
*
* @method noLoop
* @return {Object|p5.Element}
* @example
* <div><code>
* //This example both starts
* //and stops loop of sound sample
* //when the user clicks the canvas
*
* //We will store the p5.MediaElement
* //object in here
* var ele;
* //while our audio is playing,
* //this will be set to true
* var sampleIsPlaying = false;
*
* function setup() {
* //Here we create a p5.MediaElement object
* //using the createAudio() function.
* ele = createAudio('assets/beat.mp3');
* background(200);
* textAlign(CENTER);
* text('Click to play!', width / 2, height / 2);
* }
*
* function mouseClicked() {
* //here we test if the mouse is over the
* //canvas element when it's clicked
* if (mouseX >= 0 && mouseX <= width && mouseY >= 0 && mouseY <= height) {
* background(200);
*
* if (sampleIsPlaying) {
* ele.noLoop();
* text('No more Loops!', width / 2, height / 2);
* } else {
* ele.loop();
* sampleIsPlaying = true;
* text('Click to stop looping!', width / 2, height / 2);
* }
* }
* }
* </code></div>
*
*/
p5.MediaElement.prototype.noLoop = function() {
this.elt.setAttribute('loop', false);
return this;
};
/**
* Set HTML5 media element to autoplay or not.
*
* @method autoplay
* @param {Boolean} autoplay whether the element should autoplay
* @return {Object|p5.Element}
*/
p5.MediaElement.prototype.autoplay = function(val) {
this.elt.setAttribute('autoplay', val);
return this;
};
/**
* Sets volume for this HTML5 media element. If no argument is given,
* returns the current volume.
*
* @param {Number} [val] volume between 0.0 and 1.0
* @return {Number|p5.MediaElement} current volume or p5.MediaElement
* @method volume
*
* @example
* <div><code>
* var ele;
* function setup() {
* // p5.MediaElement objects are usually created
* // by calling the createAudio(), createVideo(),
* // and createCapture() functions.
* // In this example we create
* // a new p5.MediaElement via createAudio().
* ele = createAudio('assets/lucky_dragons.mp3');
* background(250);
* textAlign(CENTER);
* text('Click to Play!', width / 2, height / 2);
* }
* function mouseClicked() {
* // Here we call the volume() function
* // on the sound element to set its volume
* // Volume must be between 0.0 and 1.0
* ele.volume(0.2);
* ele.play();
* background(200);
* text('You clicked Play!', width / 2, height / 2);
* }
* </code></div>
* <div><code>
* var audio;
* var counter = 0;
*
* function loaded() {
* audio.play();
* }
*
* function setup() {
* audio = createAudio('assets/lucky_dragons.mp3', loaded);
* textAlign(CENTER);
* }
*
* function draw() {
* if (counter === 0) {
* background(0, 255, 0);
* text('volume(0.9)', width / 2, height / 2);
* } else if (counter === 1) {
* background(255, 255, 0);
* text('volume(0.5)', width / 2, height / 2);
* } else if (counter === 2) {
* background(255, 0, 0);
* text('volume(0.1)', width / 2, height / 2);
* }
* }
*
* function mousePressed() {
* counter++;
* if (counter === 0) {
* audio.volume(0.9);
* } else if (counter === 1) {
* audio.volume(0.5);
* } else if (counter === 2) {
* audio.volume(0.1);
* } else {
* counter = 0;
* audio.volume(0.9);
* }
* }
* </code>
* </div>
*/
p5.MediaElement.prototype.volume = function(val) {
if (typeof val === 'undefined') {
return this.elt.volume;
} else {
this.elt.volume = val;
}
};
/**
* If no arguments are given, returns the current playback speed of the
* element. The speed parameter sets the speed where 2.0 will play the
* element twice as fast, 0.5 will play at half the speed, and -1 will play
* the element in normal speed in reverse.(Note that not all browsers support
* backward playback and even if they do, playback might not be smooth.)
*
* @method speed
* @param {Number} [speed] speed multiplier for element playback
* @return {Number|Object|p5.MediaElement} current playback speed or p5.MediaElement
* @example
* <div class='norender notest'><code>
* //Clicking the canvas will loop
* //the audio sample until the user
* //clicks again to stop it
*
* //We will store the p5.MediaElement
* //object in here
* var ele;
* var button;
*
* function setup() {
* createCanvas(710, 400);
* //Here we create a p5.MediaElement object
* //using the createAudio() function.
* ele = createAudio('assets/beat.mp3');
* ele.loop();
* background(200);
*
* button = createButton('2x speed');
* button.position(100, 68);
* button.mousePressed(twice_speed);
*
* button = createButton('half speed');
* button.position(200, 68);
* button.mousePressed(half_speed);
*
* button = createButton('reverse play');
* button.position(300, 68);
* button.mousePressed(reverse_speed);
*
* button = createButton('STOP');
* button.position(400, 68);
* button.mousePressed(stop_song);
*
* button = createButton('PLAY!');
* button.position(500, 68);
* button.mousePressed(play_speed);
* }
*
* function twice_speed() {
* ele.speed(2);
* }
*
* function half_speed() {
* ele.speed(0.5);
* }
*
* function reverse_speed() {
* ele.speed(-1);
* }
*
* function stop_song() {
* ele.stop();
* }
*
* function play_speed() {
* ele.play();
* }
* </code></div>
*/
p5.MediaElement.prototype.speed = function(val) {
if (typeof val === 'undefined') {
return this.elt.playbackRate;
} else {
this.elt.playbackRate = val;
}
};
/**
* If no arguments are given, returns the current time of the element.
* If an argument is given the current time of the element is set to it.
*
* @method time
* @param {Number} [time] time to jump to (in seconds)
* @return {Number|Object|p5.MediaElement} current time (in seconds)
* or p5.MediaElement
* @example
* <div><code>
* var ele;
* var beginning = true;
* function setup() {
* //p5.MediaElement objects are usually created
* //by calling the createAudio(), createVideo(),
* //and createCapture() functions.
*
* //In this example we create
* //a new p5.MediaElement via createAudio().
* ele = createAudio('assets/lucky_dragons.mp3');
* background(250);
* textAlign(CENTER);
* text('start at beginning', width / 2, height / 2);
* }
*
* // this function fires with click anywhere
* function mousePressed() {
* if (beginning === true) {
* // here we start the sound at the beginning
* // time(0) is not necessary here
* // as this produces the same result as
* // play()
* ele.play().time(0);
* background(200);
* text('jump 2 sec in', width / 2, height / 2);
* beginning = false;
* } else {
* // here we jump 2 seconds into the sound
* ele.play().time(2);
* background(250);
* text('start at beginning', width / 2, height / 2);
* beginning = true;
* }
* }
* </code></div>
*/
p5.MediaElement.prototype.time = function(val) {
if (typeof val === 'undefined') {
return this.elt.currentTime;
} else {
this.elt.currentTime = val;
}
};
/**
* Returns the duration of the HTML5 media element.
*
* @method duration
* @return {Number} duration
*
* @example
* <div><code>
* var ele;
* function setup() {
* //p5.MediaElement objects are usually created
* //by calling the createAudio(), createVideo(),
* //and createCapture() functions.
* //In this example we create
* //a new p5.MediaElement via createAudio().
* ele = createAudio('assets/doorbell.mp3');
* background(250);
* textAlign(CENTER);
* text('Click to know the duration!', 10, 25, 70, 80);
* }
* function mouseClicked() {
* ele.play();
* background(200);
* //ele.duration dislpays the duration
* text(ele.duration() + ' seconds', width / 2, height / 2);
* }
* </code></div>
*/
p5.MediaElement.prototype.duration = function() {
return this.elt.duration;
};
p5.MediaElement.prototype.pixels = [];
p5.MediaElement.prototype.loadPixels = function() {
if (!this.canvas) {
this.canvas = document.createElement('canvas');
this.drawingContext = this.canvas.getContext('2d');
}
if (this.loadedmetadata) {
// wait for metadata for w/h
if (this.canvas.width !== this.elt.width) {
this.canvas.width = this.elt.width;
this.canvas.height = this.elt.height;
this.width = this.canvas.width;
this.height = this.canvas.height;
}
this.drawingContext.drawImage(
this.elt,
0,
0,
this.canvas.width,
this.canvas.height
);
p5.Renderer2D.prototype.loadPixels.call(this);
}
this.setModified(true);
return this;
};
p5.MediaElement.prototype.updatePixels = function(x, y, w, h) {
if (this.loadedmetadata) {
// wait for metadata
p5.Renderer2D.prototype.updatePixels.call(this, x, y, w, h);
}
this.setModified(true);
return this;
};
p5.MediaElement.prototype.get = function(x, y, w, h) {
if (this.loadedmetadata) {
// wait for metadata
return p5.Renderer2D.prototype.get.call(this, x, y, w, h);
} else if (typeof x === 'undefined') {
return new p5.Image(1, 1);
} else if (w > 1) {
return new p5.Image(x, y, w, h);
} else {
return [0, 0, 0, 255];
}
};
p5.MediaElement.prototype.set = function(x, y, imgOrCol) {
if (this.loadedmetadata) {
// wait for metadata
p5.Renderer2D.prototype.set.call(this, x, y, imgOrCol);
this.setModified(true);
}
};
p5.MediaElement.prototype.copy = function() {
p5.Renderer2D.prototype.copy.apply(this, arguments);
};
p5.MediaElement.prototype.mask = function() {
this.loadPixels();
this.setModified(true);
p5.Image.prototype.mask.apply(this, arguments);
};
/**
* helper method for web GL mode to figure out if the element
* has been modified and might need to be re-uploaded to texture
* memory between frames.
* @method isModified
* @private
* @return {boolean} a boolean indicating whether or not the
* image has been updated or modified since last texture upload.
*/
p5.MediaElement.prototype.isModified = function() {
return this._modified;
};
/**
* helper method for web GL mode to indicate that an element has been
* changed or unchanged since last upload. gl texture upload will
* set this value to false after uploading the texture; or might set
* it to true if metadata has become available but there is no actual
* texture data available yet..
* @method setModified
* @param {boolean} val sets whether or not the element has been
* modified.
* @private
*/
p5.MediaElement.prototype.setModified = function(value) {
this._modified = value;
};
/**
* Schedule an event to be called when the audio or video
* element reaches the end. If the element is looping,
* this will not be called. The element is passed in
* as the argument to the onended callback.
*
* @method onended
* @param {Function} callback function to call when the
* soundfile has ended. The
* media element will be passed
* in as the argument to the
* callback.
* @return {Object|p5.MediaElement}
* @example
* <div><code>
* function setup() {
* var audioEl = createAudio('assets/beat.mp3');
* audioEl.showControls();
* audioEl.onended(sayDone);
* }
*
* function sayDone(elt) {
* alert('done playing ' + elt.src);
* }
* </code></div>
*/
p5.MediaElement.prototype.onended = function(callback) {
this._onended = callback;
return this;
};
/*** CONNECT TO WEB AUDIO API / p5.sound.js ***/
/**
* Send the audio output of this element to a specified audioNode or
* p5.sound object. If no element is provided, connects to p5's master
* output. That connection is established when this method is first called.
* All connections are removed by the .disconnect() method.
*
* This method is meant to be used with the p5.sound.js addon library.
*
* @method connect
* @param {AudioNode|Object} audioNode AudioNode from the Web Audio API,
* or an object from the p5.sound library
*/
p5.MediaElement.prototype.connect = function(obj) {
var audioContext, masterOutput;
// if p5.sound exists, same audio context
if (typeof p5.prototype.getAudioContext === 'function') {
audioContext = p5.prototype.getAudioContext();
masterOutput = p5.soundOut.input;
} else {
try {
audioContext = obj.context;
masterOutput = audioContext.destination;
} catch (e) {
throw 'connect() is meant to be used with Web Audio API or p5.sound.js';
}
}
// create a Web Audio MediaElementAudioSourceNode if none already exists
if (!this.audioSourceNode) {
this.audioSourceNode = audioContext.createMediaElementSource(this.elt);
// connect to master output when this method is first called
this.audioSourceNode.connect(masterOutput);
}
// connect to object if provided
if (obj) {
if (obj.input) {
this.audioSourceNode.connect(obj.input);
} else {
this.audioSourceNode.connect(obj);
}
} else {
// otherwise connect to master output of p5.sound / AudioContext
this.audioSourceNode.connect(masterOutput);
}
};
/**
* Disconnect all Web Audio routing, including to master output.
* This is useful if you want to re-route the output through
* audio effects, for example.
*
* @method disconnect
*/
p5.MediaElement.prototype.disconnect = function() {
if (this.audioSourceNode) {
this.audioSourceNode.disconnect();
} else {
throw 'nothing to disconnect';
}
};
/*** SHOW / HIDE CONTROLS ***/
/**
* Show the default MediaElement controls, as determined by the web browser.
*
* @method showControls
* @example
* <div><code>
* var ele;
* function setup() {
* //p5.MediaElement objects are usually created
* //by calling the createAudio(), createVideo(),
* //and createCapture() functions.
* //In this example we create
* //a new p5.MediaElement via createAudio()
* ele = createAudio('assets/lucky_dragons.mp3');
* background(200);
* textAlign(CENTER);
* text('Click to Show Controls!', 10, 25, 70, 80);
* }
* function mousePressed() {
* ele.showControls();
* background(200);
* text('Controls Shown', width / 2, height / 2);
* }
* </code></div>
*/
p5.MediaElement.prototype.showControls = function() {
// must set style for the element to show on the page
this.elt.style['text-align'] = 'inherit';
this.elt.controls = true;
};
/**
* Hide the default mediaElement controls.
* @method hideControls
* @example
* <div><code>
* var ele;
* function setup() {
* //p5.MediaElement objects are usually created
* //by calling the createAudio(), createVideo(),
* //and createCapture() functions.
* //In this example we create
* //a new p5.MediaElement via createAudio()
* ele = createAudio('assets/lucky_dragons.mp3');
* ele.showControls();
* background(200);
* textAlign(CENTER);
* text('Click to hide Controls!', 10, 25, 70, 80);
* }
* function mousePressed() {
* ele.hideControls();
* background(200);
* text('Controls hidden', width / 2, height / 2);
* }
* </code></div>
*/
p5.MediaElement.prototype.hideControls = function() {
this.elt.controls = false;
};
/*** SCHEDULE EVENTS ***/
// Cue inspired by JavaScript setTimeout, and the
// Tone.js Transport Timeline Event, MIT License Yotam Mann 2015 tonejs.org
var Cue = function(callback, time, id, val) {
this.callback = callback;
this.time = time;
this.id = id;
this.val = val;
};
/**
* Schedule events to trigger every time a MediaElement
* (audio/video) reaches a playback cue point.
*
* Accepts a callback function, a time (in seconds) at which to trigger
* the callback, and an optional parameter for the callback.
*
* Time will be passed as the first parameter to the callback function,
* and param will be the second parameter.
*
*
* @method addCue
* @param {Number} time Time in seconds, relative to this media
* element's playback. For example, to trigger
* an event every time playback reaches two
* seconds, pass in the number 2. This will be
* passed as the first parameter to
* the callback function.
* @param {Function} callback Name of a function that will be
* called at the given time. The callback will
* receive time and (optionally) param as its
* two parameters.
* @param {Object} [value] An object to be passed as the
* second parameter to the
* callback function.
* @return {Number} id ID of this cue,
* useful for removeCue(id)
* @example
* <div><code>
* function setup() {
* background(255, 255, 255);
*
* var audioEl = createAudio('assets/beat.mp3');
* audioEl.showControls();
*
* // schedule three calls to changeBackground
* audioEl.addCue(0.5, changeBackground, color(255, 0, 0));
* audioEl.addCue(1.0, changeBackground, color(0, 255, 0));
* audioEl.addCue(2.5, changeBackground, color(0, 0, 255));
* audioEl.addCue(3.0, changeBackground, color(0, 255, 255));
* audioEl.addCue(4.2, changeBackground, color(255, 255, 0));
* audioEl.addCue(5.0, changeBackground, color(255, 255, 0));
* }
*
* function changeBackground(val) {
* background(val);
* }
* </code></div>
*/
p5.MediaElement.prototype.addCue = function(time, callback, val) {
var id = this._cueIDCounter++;
var cue = new Cue(callback, time, id, val);
this._cues.push(cue);
if (!this.elt.ontimeupdate) {
this.elt.ontimeupdate = this._onTimeUpdate.bind(this);
}
return id;
};
/**
* Remove a callback based on its ID. The ID is returned by the
* addCue method.
* @method removeCue
* @param {Number} id ID of the cue, as returned by addCue
* @example
* <div><code>
* var audioEl, id1, id2;
* function setup() {
* background(255, 255, 255);
* audioEl = createAudio('assets/beat.mp3');
* audioEl.showControls();
* // schedule five calls to changeBackground
* id1 = audioEl.addCue(0.5, changeBackground, color(255, 0, 0));
* audioEl.addCue(1.0, changeBackground, color(0, 255, 0));
* audioEl.addCue(2.5, changeBackground, color(0, 0, 255));
* audioEl.addCue(3.0, changeBackground, color(0, 255, 255));
* id2 = audioEl.addCue(4.2, changeBackground, color(255, 255, 0));
* text('Click to remove first and last Cue!', 10, 25, 70, 80);
* }
* function mousePressed() {
* audioEl.removeCue(id1);
* audioEl.removeCue(id2);
* }
* function changeBackground(val) {
* background(val);
* }
* </code></div>
*/
p5.MediaElement.prototype.removeCue = function(id) {
for (var i = 0; i < this._cues.length; i++) {
if (this._cues[i].id === id) {
console.log(id);
this._cues.splice(i, 1);
}
}
if (this._cues.length === 0) {
this.elt.ontimeupdate = null;
}
};
/**
* Remove all of the callbacks that had originally been scheduled
* via the addCue method.
* @method clearCues
* @param {Number} id ID of the cue, as returned by addCue
* @example
* <div><code>
* var audioEl;
* function setup() {
* background(255, 255, 255);
* audioEl = createAudio('assets/beat.mp3');
* //Show the default MediaElement controls, as determined by the web browser
* audioEl.showControls();
* // schedule calls to changeBackground
* background(200);
* text('Click to change Cue!', 10, 25, 70, 80);
* audioEl.addCue(0.5, changeBackground, color(255, 0, 0));
* audioEl.addCue(1.0, changeBackground, color(0, 255, 0));
* audioEl.addCue(2.5, changeBackground, color(0, 0, 255));
* audioEl.addCue(3.0, changeBackground, color(0, 255, 255));
* audioEl.addCue(4.2, changeBackground, color(255, 255, 0));
* }
* function mousePressed() {
* // here we clear the scheduled callbacks
* audioEl.clearCues();
* // then we add some more callbacks
* audioEl.addCue(1, changeBackground, color(2, 2, 2));
* audioEl.addCue(3, changeBackground, color(255, 255, 0));
* }
* function changeBackground(val) {
* background(val);
* }
* </code></div>
*/
p5.MediaElement.prototype.clearCues = function() {
this._cues = [];
this.elt.ontimeupdate = null;
};
// private method that checks for cues to be fired if events
// have been scheduled using addCue(callback, time).
p5.MediaElement.prototype._onTimeUpdate = function() {
var playbackTime = this.time();
for (var i = 0; i < this._cues.length; i++) {
var callbackTime = this._cues[i].time;
var val = this._cues[i].val;
if (this._prevTime < callbackTime && callbackTime <= playbackTime) {
// pass the scheduled callbackTime as parameter to the callback
this._cues[i].callback(val);
}
}
this._prevTime = playbackTime;
};
// =============================================================================
// p5.File
// =============================================================================
/**
* Base class for a file
* Using this for createFileInput
*
* @class p5.File
* @constructor
* @param {File} file File that is wrapped
*/
p5.File = function(file, pInst) {
/**
* Underlying File object. All normal File methods can be called on this.
*
* @property file
*/
this.file = file;
this._pInst = pInst;
// Splitting out the file type into two components
// This makes determining if image or text etc simpler
var typeList = file.type.split('/');
/**
* File type (image, text, etc.)
*
* @property type
*/
this.type = typeList[0];
/**
* File subtype (usually the file extension jpg, png, xml, etc.)
*
* @property subtype
*/
this.subtype = typeList[1];
/**
* File name
*
* @property name
*/
this.name = file.name;
/**
* File size
*
* @property size
*/
this.size = file.size;
/**
* URL string containing image data.
*
* @property data
*/
this.data = undefined;
};
});
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