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<!DOCTYPE html>
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<title>Phaser Source: gameobjects/Button.js</title>
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<h1 class="page-title">Source: gameobjects/Button.js</h1>
<section>
<article>
<pre class="sunlight-highlight-javascript linenums">/**
* @author Richard Davey <rich@photonstorm.com>
* @copyright 2014 Photon Storm Ltd.
* @license {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
*/
/**
* @class Phaser.Button
*
* @classdesc Create a new `Button` object. A Button is a special type of Sprite that is set-up to handle Pointer events automatically. The four states a Button responds to are:
*
* * 'Over' - when the Pointer moves over the Button. This is also commonly known as 'hover'.
* * 'Out' - when the Pointer that was previously over the Button moves out of it.
* * 'Down' - when the Pointer is pressed down on the Button. I.e. touched on a touch enabled device or clicked with the mouse.
* * 'Up' - when the Pointer that was pressed down on the Button is released again.
*
* You can set a unique texture frame and Sound for any of these states.
*
* @constructor
* @extends Phaser.Image
*
* @param {Phaser.Game} game Current game instance.
* @param {number} [x=0] - X position of the Button.
* @param {number} [y=0] - Y position of the Button.
* @param {string} [key] - The image key as defined in the Game.Cache to use as the texture for this Button.
* @param {function} [callback] - The function to call when this Button is pressed.
* @param {object} [callbackContext] - The context in which the callback will be called (usually 'this').
* @param {string|number} [overFrame] - This is the frame or frameName that will be set when this button is in an over state. Give either a number to use a frame ID or a string for a frame name.
* @param {string|number} [outFrame] - This is the frame or frameName that will be set when this button is in an out state. Give either a number to use a frame ID or a string for a frame name.
* @param {string|number} [downFrame] - This is the frame or frameName that will be set when this button is in a down state. Give either a number to use a frame ID or a string for a frame name.
* @param {string|number} [upFrame] - This is the frame or frameName that will be set when this button is in an up state. Give either a number to use a frame ID or a string for a frame name.
*/
Phaser.Button = function (game, x, y, key, callback, callbackContext, overFrame, outFrame, downFrame, upFrame) {
x = x || 0;
y = y || 0;
key = key || null;
callback = callback || null;
callbackContext = callbackContext || this;
Phaser.Image.call(this, game, x, y, key, outFrame);
/**
* @property {number} type - The Phaser Object Type.
*/
this.type = Phaser.BUTTON;
/**
* @property {string} _onOverFrameName - Internal variable.
* @private
* @default
*/
this._onOverFrameName = null;
/**
* @property {string} _onOutFrameName - Internal variable.
* @private
* @default
*/
this._onOutFrameName = null;
/**
* @property {string} _onDownFrameName - Internal variable.
* @private
* @default
*/
this._onDownFrameName = null;
/**
* @property {string} _onUpFrameName - Internal variable.
* @private
* @default
*/
this._onUpFrameName = null;
/**
* @property {number} _onOverFrameID - Internal variable.
* @private
* @default
*/
this._onOverFrameID = null;
/**
* @property {number} _onOutFrameID - Internal variable.
* @private
* @default
*/
this._onOutFrameID = null;
/**
* @property {number} _onDownFrameID - Internal variable.
* @private
* @default
*/
this._onDownFrameID = null;
/**
* @property {number} _onUpFrameID - Internal variable.
* @private
* @default
*/
this._onUpFrameID = null;
/**
* @property {Phaser.Sound} onOverSound - The Sound to be played when this Buttons Over state is activated.
* @default
*/
this.onOverSound = null;
/**
* @property {Phaser.Sound} onOutSound - The Sound to be played when this Buttons Out state is activated.
* @default
*/
this.onOutSound = null;
/**
* @property {Phaser.Sound} onDownSound - The Sound to be played when this Buttons Down state is activated.
* @default
*/
this.onDownSound = null;
/**
* @property {Phaser.Sound} onUpSound - The Sound to be played when this Buttons Up state is activated.
* @default
*/
this.onUpSound = null;
/**
* @property {string} onOverSoundMarker - The Sound Marker used in conjunction with the onOverSound.
* @default
*/
this.onOverSoundMarker = '';
/**
* @property {string} onOutSoundMarker - The Sound Marker used in conjunction with the onOutSound.
* @default
*/
this.onOutSoundMarker = '';
/**
* @property {string} onDownSoundMarker - The Sound Marker used in conjunction with the onDownSound.
* @default
*/
this.onDownSoundMarker = '';
/**
* @property {string} onUpSoundMarker - The Sound Marker used in conjunction with the onUpSound.
* @default
*/
this.onUpSoundMarker = '';
/**
* @property {Phaser.Signal} onInputOver - The Signal (or event) dispatched when this Button is in an Over state.
*/
this.onInputOver = new Phaser.Signal();
/**
* @property {Phaser.Signal} onInputOut - The Signal (or event) dispatched when this Button is in an Out state.
*/
this.onInputOut = new Phaser.Signal();
/**
* @property {Phaser.Signal} onInputDown - The Signal (or event) dispatched when this Button is in an Down state.
*/
this.onInputDown = new Phaser.Signal();
/**
* @property {Phaser.Signal} onInputUp - The Signal (or event) dispatched when this Button is in an Up state.
*/
this.onInputUp = new Phaser.Signal();
/**
* @property {boolean} freezeFrames - When true the Button will cease to change texture frame on all events (over, out, up, down).
*/
this.freezeFrames = false;
/**
* When the Button is touched / clicked and then released you can force it to enter a state of "out" instead of "up".
* @property {boolean} forceOut
* @default
*/
this.forceOut = false;
this.inputEnabled = true;
this.input.start(0, true);
this.setFrames(overFrame, outFrame, downFrame, upFrame);
if (callback !== null)
{
this.onInputUp.add(callback, callbackContext);
}
// Redirect the input events to here so we can handle animation updates, etc
this.events.onInputOver.add(this.onInputOverHandler, this);
this.events.onInputOut.add(this.onInputOutHandler, this);
this.events.onInputDown.add(this.onInputDownHandler, this);
this.events.onInputUp.add(this.onInputUpHandler, this);
};
Phaser.Button.prototype = Object.create(Phaser.Image.prototype);
Phaser.Button.prototype.constructor = Phaser.Button;
/**
* Clears all of the frames set on this Button.
*
* @method Phaser.Button.prototype.clearFrames
*/
Phaser.Button.prototype.clearFrames = function () {
this._onOverFrameName = null;
this._onOverFrameID = null;
this._onOutFrameName = null;
this._onOutFrameID = null;
this._onDownFrameName = null;
this._onDownFrameID = null;
this._onUpFrameName = null;
this._onUpFrameID = null;
}
/**
* Used to manually set the frames that will be used for the different states of the Button.
*
* @method Phaser.Button.prototype.setFrames
* @param {string|number} [overFrame] - This is the frame or frameName that will be set when this button is in an over state. Give either a number to use a frame ID or a string for a frame name.
* @param {string|number} [outFrame] - This is the frame or frameName that will be set when this button is in an out state. Give either a number to use a frame ID or a string for a frame name.
* @param {string|number} [downFrame] - This is the frame or frameName that will be set when this button is in a down state. Give either a number to use a frame ID or a string for a frame name.
* @param {string|number} [upFrame] - This is the frame or frameName that will be set when this button is in an up state. Give either a number to use a frame ID or a string for a frame name.
*/
Phaser.Button.prototype.setFrames = function (overFrame, outFrame, downFrame, upFrame) {
this.clearFrames();
if (overFrame !== null)
{
if (typeof overFrame === 'string')
{
this._onOverFrameName = overFrame;
if (this.input.pointerOver())
{
this.frameName = overFrame;
}
}
else
{
this._onOverFrameID = overFrame;
if (this.input.pointerOver())
{
this.frame = overFrame;
}
}
}
if (outFrame !== null)
{
if (typeof outFrame === 'string')
{
this._onOutFrameName = outFrame;
if (this.input.pointerOver() === false)
{
this.frameName = outFrame;
}
}
else
{
this._onOutFrameID = outFrame;
if (this.input.pointerOver() === false)
{
this.frame = outFrame;
}
}
}
if (downFrame !== null)
{
if (typeof downFrame === 'string')
{
this._onDownFrameName = downFrame;
if (this.input.pointerDown())
{
this.frameName = downFrame;
}
}
else
{
this._onDownFrameID = downFrame;
if (this.input.pointerDown())
{
this.frame = downFrame;
}
}
}
if (upFrame !== null)
{
if (typeof upFrame === 'string')
{
this._onUpFrameName = upFrame;
if (this.input.pointerUp())
{
this.frameName = upFrame;
}
}
else
{
this._onUpFrameID = upFrame;
if (this.input.pointerUp())
{
this.frame = upFrame;
}
}
}
};
/**
* Sets the sounds to be played whenever this Button is interacted with. Sounds can be either full Sound objects, or markers pointing to a section of a Sound object.
* The most common forms of sounds are 'hover' effects and 'click' effects, which is why the order of the parameters is overSound then downSound.
* Call this function with no parameters at all to reset all sounds on this Button.
*
* @method Phaser.Button.prototype.setSounds
* @param {Phaser.Sound} [overSound] - Over Button Sound.
* @param {string} [overMarker] - Over Button Sound Marker.
* @param {Phaser.Sound} [downSound] - Down Button Sound.
* @param {string} [downMarker] - Down Button Sound Marker.
* @param {Phaser.Sound} [outSound] - Out Button Sound.
* @param {string} [outMarker] - Out Button Sound Marker.
* @param {Phaser.Sound} [upSound] - Up Button Sound.
* @param {string} [upMarker] - Up Button Sound Marker.
*/
Phaser.Button.prototype.setSounds = function (overSound, overMarker, downSound, downMarker, outSound, outMarker, upSound, upMarker) {
this.setOverSound(overSound, overMarker);
this.setOutSound(outSound, outMarker);
this.setDownSound(downSound, downMarker);
this.setUpSound(upSound, upMarker);
}
/**
* The Sound to be played when a Pointer moves over this Button.
*
* @method Phaser.Button.prototype.setOverSound
* @param {Phaser.Sound} sound - The Sound that will be played.
* @param {string} [marker] - A Sound Marker that will be used in the playback.
*/
Phaser.Button.prototype.setOverSound = function (sound, marker) {
this.onOverSound = null;
this.onOverSoundMarker = '';
if (sound instanceof Phaser.Sound)
{
this.onOverSound = sound;
}
if (typeof marker === 'string')
{
this.onOverSoundMarker = marker;
}
}
/**
* The Sound to be played when a Pointer moves out of this Button.
*
* @method Phaser.Button.prototype.setOutSound
* @param {Phaser.Sound} sound - The Sound that will be played.
* @param {string} [marker] - A Sound Marker that will be used in the playback.
*/
Phaser.Button.prototype.setOutSound = function (sound, marker) {
this.onOutSound = null;
this.onOutSoundMarker = '';
if (sound instanceof Phaser.Sound)
{
this.onOutSound = sound;
}
if (typeof marker === 'string')
{
this.onOutSoundMarker = marker;
}
}
/**
* The Sound to be played when a Pointer presses down on this Button.
*
* @method Phaser.Button.prototype.setDownSound
* @param {Phaser.Sound} sound - The Sound that will be played.
* @param {string} [marker] - A Sound Marker that will be used in the playback.
*/
Phaser.Button.prototype.setDownSound = function (sound, marker) {
this.onDownSound = null;
this.onDownSoundMarker = '';
if (sound instanceof Phaser.Sound)
{
this.onDownSound = sound;
}
if (typeof marker === 'string')
{
this.onDownSoundMarker = marker;
}
}
/**
* The Sound to be played when a Pointer has pressed down and is released from this Button.
*
* @method Phaser.Button.prototype.setUpSound
* @param {Phaser.Sound} sound - The Sound that will be played.
* @param {string} [marker] - A Sound Marker that will be used in the playback.
*/
Phaser.Button.prototype.setUpSound = function (sound, marker) {
this.onUpSound = null;
this.onUpSoundMarker = '';
if (sound instanceof Phaser.Sound)
{
this.onUpSound = sound;
}
if (typeof marker === 'string')
{
this.onUpSoundMarker = marker;
}
}
/**
* Internal function that handles input events.
*
* @protected
* @method Phaser.Button.prototype.onInputOverHandler
* @param {Phaser.Button} sprite - The Button that the event occured on.
* @param {Phaser.Pointer} pointer - The Pointer that activated the Button.
*/
Phaser.Button.prototype.onInputOverHandler = function (sprite, pointer) {
if (this.freezeFrames === false)
{
this.setState(1);
}
if (this.onOverSound)
{
this.onOverSound.play(this.onOverSoundMarker);
}
if (this.onInputOver)
{
this.onInputOver.dispatch(this, pointer);
}
};
/**
* Internal function that handles input events.
*
* @protected
* @method Phaser.Button.prototype.onInputOutHandler
* @param {Phaser.Button} sprite - The Button that the event occured on.
* @param {Phaser.Pointer} pointer - The Pointer that activated the Button.
*/
Phaser.Button.prototype.onInputOutHandler = function (sprite, pointer) {
if (this.freezeFrames === false)
{
this.setState(2);
}
if (this.onOutSound)
{
this.onOutSound.play(this.onOutSoundMarker);
}
if (this.onInputOut)
{
this.onInputOut.dispatch(this, pointer);
}
};
/**
* Internal function that handles input events.
*
* @protected
* @method Phaser.Button.prototype.onInputDownHandler
* @param {Phaser.Button} sprite - The Button that the event occured on.
* @param {Phaser.Pointer} pointer - The Pointer that activated the Button.
*/