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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>JSDoc: Source: input/keyboard/Keyboard.js</title>
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<div id="main">
<h1 class="page-title">Source: input/keyboard/Keyboard.js</h1>
<section>
<article>
<pre class="prettyprint source linenums"><code>//------------------------------------------------------------------------------
// Constructor scope
//------------------------------------------------------------------------------
/**
* Creates a new instance of the Keyboard class.
*
* @constructor
*
* @param {Object} [options] Keyboard settings.
*
* @class
* @classdesc
*
* The Keyboard class represents a physical keyboard with associated keys.
* With class instances, it is possible to read the state (pressed, released,
* etc.) for each individual key on the keyboard.
*/
rune.input.Keyboard = function(options) {
//--------------------------------------------------------------------------
// Private properties
//--------------------------------------------------------------------------
/**
* Whether the keyboard should be activated or not. An inactive keyboard,
* registers no input.
*
* @type {boolean}
* @private
*/
this.m_enabled = Boolean(options.enable);
/**
* List of keyboard keys.
*
* @type {Array.<rune.input.KeyboardKey>}
* @private
*/
this.m_keys = new Array(rune.input.Keyboard.NUM_KEYS);
/**
* Lookup table for the keyboard keys.
*
* @type {Object}
* @private
*/
this.m_LUT = {};
/**
* Reference to event handler (keydown).
*
* @type {Function}
* @private
*/
this.m_onKeyDownHandler = null;
/**
* Reference to event handler (keyup).
*
* @type {Function}
* @private
*/
this.m_onKeyUpHandler = null;
/**
* Settings for the current keyboard.
*
* @type {rune.input.KeyboardOptions}
* @private
*/
this.m_options = new rune.input.KeyboardOptions(options);
//--------------------------------------------------------------------------
// Constructor call
//--------------------------------------------------------------------------
/**
* Invokes secondary class constructor.
*/
this.m_construct();
};
//------------------------------------------------------------------------------
// Public static constants
//------------------------------------------------------------------------------
/**
* Number of keys.
*
* @constant {number}
*/
rune.input.Keyboard.NUM_KEYS = 256;
//------------------------------------------------------------------------------
// Public prototype getter and setter methods
//------------------------------------------------------------------------------
/**
* Whether the keyboard should be activated or not. An inactive (false)
* keyboard, registers no input.
*
* @member {boolean} enabled
* @memberof rune.input.Keyboard
* @instance
*/
Object.defineProperty(rune.input.Keyboard.prototype, "enabled", {
/**
* @this rune.input.Keyboard
* @ignore
*/
get : function() {
return this.m_enabled;
},
/**
* @this rune.input.Keyboard
* @ignore
*/
set : function(value) {
if (this.m_enabled != value) {
this.m_enabled = value;
if (this.m_enabled == true) {
this.m_constructEvent();
} else {
this.m_disposeEvent();
this.reset();
}
}
}
});
//------------------------------------------------------------------------------
// Public prototype methods (API)
//------------------------------------------------------------------------------
/**
* Checks if the specified key was just pressed.
*
* @param {string} key A valid key, such as "SPACE".
*
* @returns {boolean}
*/
rune.input.Keyboard.prototype.justPressed = function(key) {
key = key.toUpperCase();
if (this.m_keys[this.m_LUT[key]] != null) return this.m_keys[this.m_LUT[key]].isJustPressed();
else return false;
};
/**
* Checks if the specified key has just been released.
*
* @param {string} key A valid key, such as "SPACE".
*
* @returns {boolean}
*/
rune.input.Keyboard.prototype.justReleased = function(key) {
key = key.toUpperCase();
if (this.m_keys[this.m_LUT[key]] != null) return this.m_keys[this.m_LUT[key]].isJustReleased();
else return false;
};
/**
* Checks if the specified key is pressed.
*
* @param {string} key A valid key, such as "SPACE".
*
* @returns {boolean}
*/
rune.input.Keyboard.prototype.pressed = function(key) {
key = key.toUpperCase();
if (this.m_keys[this.m_LUT[key]] != null) return this.m_keys[this.m_LUT[key]].isPressed();
else return false;
};
/**
* Resets the state of all keyboard keys.
*
* @returns {undefined}
*/
rune.input.Keyboard.prototype.reset = function() {
var i = this.m_keys.length;
while (i--) {
var key = this.m_keys[i];
if (key != null) {
key.reset();
}
}
};
//------------------------------------------------------------------------------
// Public prototype methods (ENGINE)
//------------------------------------------------------------------------------
/**
* Updating the keyboard.
*
* @returns {undefined}
* @ignore
*/
rune.input.Keyboard.prototype.update = function() {
if (this.m_enabled == true) {
this.m_updateKeys();
}
};
/**
* Removes memory allocated by the keyboard.
*
* @returns {undefined}
* @ignore
*/
rune.input.Keyboard.prototype.dispose = function() {
this.m_disposeEvent();
this.m_disposeKeys();
};
//------------------------------------------------------------------------------
// Protected prototype methods
//------------------------------------------------------------------------------
/**
* The class constructor.
*
* @returns {undefined}
* @protected
* @ignore
*/
rune.input.Keyboard.prototype.m_construct = function() {
this.m_constructKeys();
if (this.m_options.enable == true) {
this.m_constructEvent();
}
};
//------------------------------------------------------------------------------
// Private prototype methods
//------------------------------------------------------------------------------
/**
* Creates a KeyboardKey object for each key (keycode) on the keyboard.
*
* @returns {undefined}
* @private
*/
rune.input.Keyboard.prototype.m_constructKeys = function() {
var i = 0;
i = 1;
while(i <= 12) {
this.m_constructKey("F"+i, 111+(i++));
}
i = 65;
while (i <= 90) {
this.m_constructKey(String.fromCharCode(i), i++);
}
i = 48;
this.m_constructKey("ZERO", i++);
this.m_constructKey("ONE", i++);
this.m_constructKey("TWO", i++);
this.m_constructKey("THREE", i++);
this.m_constructKey("FOUR", i++);
this.m_constructKey("FIVE", i++);
this.m_constructKey("SIX", i++);
this.m_constructKey("SEVEN", i++);
this.m_constructKey("EIGHT", i++);
this.m_constructKey("NINE", i++);
i = 96;
this.m_constructKey("NUMPADZERO", i++);
this.m_constructKey("NUMPADONE", i++);
this.m_constructKey("NUMPADTWO", i++);
this.m_constructKey("NUMPADTHREE", i++);
this.m_constructKey("NUMPADFOUR", i++);
this.m_constructKey("NUMPADFIVE", i++);
this.m_constructKey("NUMPADSIX", i++);
this.m_constructKey("NUMPADSEVEN", i++);
this.m_constructKey("NUMPADEIGHT", i++);
this.m_constructKey("NUMPADNINE", i++);
this.m_constructKey("PAGEUP", 33);
this.m_constructKey("PAGEDOWN", 34);
this.m_constructKey("HOME", 36);
this.m_constructKey("END", 35);
this.m_constructKey("INSERT", 45);
this.m_constructKey("ESCAPE", 27);
this.m_constructKey("MINUS", 189);
this.m_constructKey("NUMPADMINUS", 109);
this.m_constructKey("PLUS", 187);
this.m_constructKey("NUMPADPLUS", 107);
this.m_constructKey("DELETE", 46);
this.m_constructKey("BACKSPACE", 8);
this.m_constructKey("LBRACKET", 219);
this.m_constructKey("RBRACKET", 221);
this.m_constructKey("BACKSLASH", 220);
this.m_constructKey("CAPSLOCK", 20);
this.m_constructKey("SEMICOLON", 186);
this.m_constructKey("QUOTE", 222);
this.m_constructKey("ENTER", 13);
this.m_constructKey("SHIFT", 16);
this.m_constructKey("COMMA", 188);
this.m_constructKey("PERIOD", 190);
this.m_constructKey("NUMPADPERIOD", 110);
this.m_constructKey("SLASH", 191);
this.m_constructKey("NUMPADSLASH", 191);
this.m_constructKey("CONTROL", 17);
this.m_constructKey("ALT", 18);
this.m_constructKey("SPACE", 32);
this.m_constructKey("UP", 38);
this.m_constructKey("DOWN", 40);
this.m_constructKey("LEFT", 37);
this.m_constructKey("RIGHT", 39);
this.m_constructKey("TAB", 9);
this.m_constructKey("BACKQUOTE", 192);
};
/**
* Creates a KeyboardKey object for a specific keyboard key.
*
* @param {string} keyName Name of key.
* @param {number} keyCode Key code of key.
*
* @returns {undefined}
* @private
*/
rune.input.Keyboard.prototype.m_constructKey = function(keyName, keyCode) {
this.m_LUT[keyName] = keyCode;
this.m_keys[keyCode] = new rune.input.KeyboardKey();
};
/**
* Creates necessary event listeners.
*
* @returns {undefined}
* @private
*/
rune.input.Keyboard.prototype.m_constructEvent = function() {
this.m_constructEventKeyDown();
this.m_constructEventKeyUp();
};
/**
* Create event listeners for KEY_DOWN.
*
* @returns {undefined}
* @private
*/
rune.input.Keyboard.prototype.m_constructEventKeyDown = function() {
var m_this = this;
this.m_options.target.addEventListener(
"keydown",
this.m_onKeyDownHandler = function(event) {
m_this.m_onKeyDown(event.keyCode);
}
);
};
/**
* Create event listeners for KEY_UP.
*
* @returns {undefined}
* @private
*/
rune.input.Keyboard.prototype.m_constructEventKeyUp = function() {
var m_this = this;
this.m_options.target.addEventListener(
"keyup",
this.m_onKeyUpHandler = function(event) {
m_this.m_onKeyUp(event.keyCode);
}
);
};
/**
* Updates the state of all keys.
*
* @returns {undefined}
* @private
*/
rune.input.Keyboard.prototype.m_updateKeys = function() {
var i = this.m_keys.length;
while (i--) {
var key = this.m_keys[i];
if (key != null) {
key.update();
}
}
};
/**
* Deletes registered event listeners.
*
* @returns {undefined}
* @private
*/
rune.input.Keyboard.prototype.m_disposeEvent = function() {
this.reset();
this.m_disposeEventKeyUp();
this.m_disposeEventKeyDown();
};
/**
* Create event listeners for KEY_DOWN.
*
* @returns {undefined}
* @private
*/
rune.input.Keyboard.prototype.m_disposeEventKeyUp = function() {
var m_this = this;
this.m_options.target.removeEventListener(
"keydown",
this.m_onKeyDownHandler
);
};
/**
* Create event listeners for KEY_DOWN.
*
* @returns {undefined}
* @private
*/
rune.input.Keyboard.prototype.m_disposeEventKeyDown = function() {
var m_this = this;
this.m_options.target.removeEventListener(
"keyup",
this.m_onKeyUpHandler
);
};
/**
* Clears memory used to store information about available keys.
*
* @returns {undefined}
* @private
*/
rune.input.Keyboard.prototype.m_disposeKeys = function() {
this.m_LUT = null;
this.m_keys.length = 0;
this.m_keys = null;
};
/**
* Event handler for KEY_DOWN.
*
* @param {number} keyCode Current key code.
*
* @returns {undefined}
* @private
*/
rune.input.Keyboard.prototype.m_onKeyDown = function(keyCode) {
var key = this.m_keys[keyCode];
if (key != null) key.onKeyDown();
};
/**
* Event handler for KEY_DOWN.
*
* @param {number} keyCode Current key code.
*
* @returns {undefined}
* @private
*/
rune.input.Keyboard.prototype.m_onKeyUp = function(keyCode) {
var key = this.m_keys[keyCode];
if (key != null) key.onKeyUp();
};</code></pre>
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