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<!DOCTYPE html>
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<title>Phaser Source: input/InputHandler.js</title>
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<h1 class="page-title">Source: input/InputHandler.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}
*/
/**
* The Input Handler is bound to a specific Sprite and is responsible for managing all Input events on that Sprite.
* @class Phaser.InputHandler
* @constructor
* @param {Phaser.Sprite} sprite - The Sprite object to which this Input Handler belongs.
*/
Phaser.InputHandler = function (sprite) {
/**
* @property {Phaser.Sprite} sprite - The Sprite object to which this Input Handler belongs.
*/
this.sprite = sprite;
/**
* @property {Phaser.Game} game - A reference to the currently running game.
*/
this.game = sprite.game;
/**
* @property {boolean} enabled - If enabled the Input Handler will process input requests and monitor pointer activity.
* @default
*/
this.enabled = false;
/**
* @property {boolean} checked - A disposable flag used by the Pointer class when performing priority checks.
* @protected
*/
this.checked = false;
/**
* The priorityID is used to determine which game objects should get priority when input events occur. For example if you have
* several Sprites that overlap, by default the one at the top of the display list is given priority for input events. You can
* stop this from happening by controlling the priorityID value. The higher the value, the more important they are considered to the Input events.
* @property {number} priorityID
* @default
*/
this.priorityID = 0;
/**
* @property {boolean} useHandCursor - On a desktop browser you can set the 'hand' cursor to appear when moving over the Sprite.
* @default
*/
this.useHandCursor = false;
/**
* @property {boolean} _setHandCursor - Did this Sprite trigger the hand cursor?
* @private
*/
this._setHandCursor = false;
/**
* @property {boolean} isDragged - true if the Sprite is being currently dragged.
* @default
*/
this.isDragged = false;
/**
* @property {boolean} allowHorizontalDrag - Controls if the Sprite is allowed to be dragged horizontally.
* @default
*/
this.allowHorizontalDrag = true;
/**
* @property {boolean} allowVerticalDrag - Controls if the Sprite is allowed to be dragged vertically.
* @default
*/
this.allowVerticalDrag = true;
/**
* @property {boolean} bringToTop - If true when this Sprite is clicked or dragged it will automatically be bought to the top of the Group it is within.
* @default
*/
this.bringToTop = false;
/**
* @property {Phaser.Point} snapOffset - A Point object that contains by how far the Sprite snap is offset.
* @default
*/
this.snapOffset = null;
/**
* @property {boolean} snapOnDrag - When the Sprite is dragged this controls if the center of the Sprite will snap to the pointer on drag or not.
* @default
*/
this.snapOnDrag = false;
/**
* @property {boolean} snapOnRelease - When the Sprite is dragged this controls if the Sprite will be snapped on release.
* @default
*/
this.snapOnRelease = false;
/**
* @property {number} snapX - When a Sprite has snapping enabled this holds the width of the snap grid.
* @default
*/
this.snapX = 0;
/**
* @property {number} snapY - When a Sprite has snapping enabled this holds the height of the snap grid.
* @default
*/
this.snapY = 0;
/**
* @property {number} snapOffsetX - This defines the top-left X coordinate of the snap grid.
* @default
*/
this.snapOffsetX = 0;
/**
* @property {number} snapOffsetY - This defines the top-left Y coordinate of the snap grid..
* @default
*/
this.snapOffsetY = 0;
/**
* Set to true to use pixel perfect hit detection when checking if the pointer is over this Sprite.
* The x/y coordinates of the pointer are tested against the image in combination with the InputHandler.pixelPerfectAlpha value.
* Warning: This is expensive, especially on mobile (where it's not even needed!) so only enable if required. Also see the less-expensive InputHandler.pixelPerfectClick.
* @property {number} pixelPerfectOver - Use a pixel perfect check when testing for pointer over.
* @default
*/
this.pixelPerfectOver = false;
/**
* Set to true to use pixel perfect hit detection when checking if the pointer is over this Sprite when it's clicked or touched.
* The x/y coordinates of the pointer are tested against the image in combination with the InputHandler.pixelPerfectAlpha value.
* Warning: This is expensive so only enable if you really need it.
* @property {number} pixelPerfectClick - Use a pixel perfect check when testing for clicks or touches on the Sprite.
* @default
*/
this.pixelPerfectClick = false;
/**
* @property {number} pixelPerfectAlpha - The alpha tolerance threshold. If the alpha value of the pixel matches or is above this value, it's considered a hit.
* @default
*/
this.pixelPerfectAlpha = 255;
/**
* @property {boolean} draggable - Is this sprite allowed to be dragged by the mouse? true = yes, false = no
* @default
*/
this.draggable = false;
/**
* @property {Phaser.Rectangle} boundsRect - A region of the game world within which the sprite is restricted during drag.
* @default
*/
this.boundsRect = null;
/**
* @property {Phaser.Sprite} boundsSprite - A Sprite the bounds of which this sprite is restricted during drag.
* @default
*/
this.boundsSprite = null;
/**
* If this object is set to consume the pointer event then it will stop all propogation from this object on.
* For example if you had a stack of 6 sprites with the same priority IDs and one consumed the event, none of the others would receive it.
* @property {boolean} consumePointerEvent
* @default
*/
this.consumePointerEvent = false;
/**
* @property {boolean} _dragPhase - Internal cache var.
* @private
*/
this._dragPhase = false;
/**
* @property {boolean} _wasEnabled - Internal cache var.
* @private
*/
this._wasEnabled = false;
/**
* @property {Phaser.Point} _tempPoint - Internal cache var.
* @private
*/
this._tempPoint = new Phaser.Point();
/**
* @property {array} _pointerData - Internal cache var.
* @private
*/
this._pointerData = [];
this._pointerData.push({
id: 0,
x: 0,
y: 0,
isDown: false,
isUp: false,
isOver: false,
isOut: false,
timeOver: 0,
timeOut: 0,
timeDown: 0,
timeUp: 0,
downDuration: 0,
isDragged: false
});
};
Phaser.InputHandler.prototype = {
/**
* Starts the Input Handler running. This is called automatically when you enable input on a Sprite, or can be called directly if you need to set a specific priority.
* @method Phaser.InputHandler#start
* @param {number} priority - Higher priority sprites take click priority over low-priority sprites when they are stacked on-top of each other.
* @param {boolean} useHandCursor - If true the Sprite will show the hand cursor on mouse-over (doesn't apply to mobile browsers)
* @return {Phaser.Sprite} The Sprite object to which the Input Handler is bound.
*/
start: function (priority, useHandCursor) {
priority = priority || 0;
if (typeof useHandCursor === 'undefined') { useHandCursor = false; }
// Turning on
if (this.enabled === false)
{
// Register, etc
this.game.input.interactiveItems.add(this);
this.useHandCursor = useHandCursor;
this.priorityID = priority;
for (var i = 0; i < 10; i++)
{
this._pointerData[i] = {
id: i,
x: 0,
y: 0,
isDown: false,
isUp: false,
isOver: false,
isOut: false,
timeOver: 0,
timeOut: 0,
timeDown: 0,
timeUp: 0,
downDuration: 0,
isDragged: false
};
}
this.snapOffset = new Phaser.Point();
this.enabled = true;
this._wasEnabled = true;
// Create the signals the Input component will emit
if (this.sprite.events && this.sprite.events.onInputOver === null)
{
this.sprite.events.onInputOver = new Phaser.Signal();
this.sprite.events.onInputOut = new Phaser.Signal();
this.sprite.events.onInputDown = new Phaser.Signal();
this.sprite.events.onInputUp = new Phaser.Signal();
this.sprite.events.onDragStart = new Phaser.Signal();
this.sprite.events.onDragStop = new Phaser.Signal();
}
}
this.sprite.events.onAddedToGroup.add(this.addedToGroup, this);
this.sprite.events.onRemovedFromGroup.add(this.removedFromGroup, this);
this.flagged = false;
return this.sprite;
},
/**
* Handles when the parent Sprite is added to a new Group.
*
* @method Phaser.InputHandler#addedToGroup
* @private
*/
addedToGroup: function () {
if (this._dragPhase)
{
return;
}
if (this._wasEnabled && !this.enabled)
{
this.start();
}
},
/**
* Handles when the parent Sprite is removed from a Group.
*
* @method Phaser.InputHandler#removedFromGroup
* @private
*/
removedFromGroup: function () {
if (this._dragPhase)
{
return;
}
if (this.enabled)
{
this._wasEnabled = true;
this.stop();
}
else
{
this._wasEnabled = false;
}
},
/**
* Resets the Input Handler and disables it.
* @method Phaser.InputHandler#reset
*/
reset: function () {
this.enabled = false;
this.flagged = false;
for (var i = 0; i < 10; i++)
{
this._pointerData[i] = {
id: i,
x: 0,
y: 0,
isDown: false,
isUp: false,
isOver: false,
isOut: false,
timeOver: 0,
timeOut: 0,
timeDown: 0,
timeUp: 0,
downDuration: 0,
isDragged: false
};
}
},
/**
* Stops the Input Handler from running.
* @method Phaser.InputHandler#stop
*/
stop: function () {
// Turning off
if (this.enabled === false)
{
return;
}
else
{
// De-register, etc
this.enabled = false;
this.game.input.interactiveItems.remove(this);
}
},
/**
* Clean up memory.
* @method Phaser.InputHandler#destroy
*/
destroy: function () {
if (this.sprite)
{
if (this._setHandCursor)
{
this.game.canvas.style.cursor = "default";
this._setHandCursor = false;
}
this.enabled = false;
this.game.input.interactiveItems.remove(this);
this._pointerData.length = 0;
this.boundsRect = null;
this.boundsSprite = null;
this.sprite = null;
}
},
/**
* Checks if the object this InputHandler is bound to is valid for consideration in the Pointer move event.
* This is called by Phaser.Pointer and shouldn't typically be called directly.
*
* @method Phaser.InputHandler#validForInput
* @protected
* @param {number} highestID - The highest ID currently processed by the Pointer.
* @param {number} highestRenderID - The highest Render Order ID currently processed by the Pointer.
* @param {boolean} [includePixelPerfect=true] - If this object has `pixelPerfectClick` or `pixelPerfectOver` set should it be considered as valid?
* @return {boolean} True if the object this InputHandler is bound to should be considered as valid for input detection.
*/
validForInput: function (highestID, highestRenderID, includePixelPerfect) {
if (typeof includePixelPerfect === 'undefined') { includePixelPerfect = true; }
if (this.sprite.scale.x === 0 || this.sprite.scale.y === 0 || this.priorityID < this.game.input.minPriorityID)
{
return false;
}
// If we're trying to specifically IGNORE pixel perfect objects, then set includePixelPerfect to false and skip it
if (!includePixelPerfect && (this.pixelPerfectClick || this.pixelPerfectOver))
{
return false;
}
if (this.priorityID > highestID || (this.priorityID === highestID && this.sprite._cache[3] < highestRenderID))
{
return true;
}
return false;
},
/**
* Is this object using pixel perfect checking?
*
* @method Phaser.InputHandler#isPixelPerfect
* @return {boolean} True if the this InputHandler has either `pixelPerfectClick` or `pixelPerfectOver` set to `true`.
*/
isPixelPerfect: function () {
return (this.pixelPerfectClick || this.pixelPerfectOver);
},
/**
* The x coordinate of the Input pointer, relative to the top-left of the parent Sprite.
* This value is only set when the pointer is over this Sprite.
*
* @method Phaser.InputHandler#pointerX
* @param {number} pointer - The index of the pointer to check. You can get this from Phaser.Pointer.id.
* @return {number} The x coordinate of the Input pointer.
*/
pointerX: function (pointer) {
pointer = pointer || 0;
return this._pointerData[pointer].x;