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src_pixi_InteractionManager.js.html
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<h1 class="file-heading">File: src/pixi/InteractionManager.js</h1>
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<pre class="code prettyprint linenums">
/**
* @author Mat Groves http://matgroves.com/ @Doormat23
*/
/**
* The interaction manager deals with mouse and touch events. Any DisplayObject can be interactive
* if its interactive parameter is set to true
* This manager also supports multitouch.
*
* @class InteractionManager
* @constructor
* @param stage {Stage} The stage to handle interactions
*/
PIXI.InteractionManager = function(stage)
{
/**
* A reference to the stage
*
* @property stage
* @type Stage
*/
this.stage = stage;
/**
* The mouse data
*
* @property mouse
* @type InteractionData
*/
this.mouse = new PIXI.InteractionData();
/**
* An object that stores current touches (InteractionData) by id reference
*
* @property touches
* @type Object
*/
this.touches = {};
/**
* @property tempPoint
* @type Point
* @private
*/
this.tempPoint = new PIXI.Point();
/**
* @property mouseoverEnabled
* @type Boolean
* @default
*/
this.mouseoverEnabled = true;
/**
* Tiny little interactiveData pool !
*
* @property pool
* @type Array
*/
this.pool = [];
/**
* An array containing all the iterative items from the our interactive tree
* @property interactiveItems
* @type Array
* @private
*/
this.interactiveItems = [];
/**
* Our canvas
* @property interactionDOMElement
* @type HTMLCanvasElement
* @private
*/
this.interactionDOMElement = null;
//this will make it so that you don't have to call bind all the time
/**
* @property onMouseMove
* @type Function
*/
this.onMouseMove = this.onMouseMove.bind( this );
/**
* @property onMouseDown
* @type Function
*/
this.onMouseDown = this.onMouseDown.bind(this);
/**
* @property onMouseOut
* @type Function
*/
this.onMouseOut = this.onMouseOut.bind(this);
/**
* @property onMouseUp
* @type Function
*/
this.onMouseUp = this.onMouseUp.bind(this);
/**
* @property onTouchStart
* @type Function
*/
this.onTouchStart = this.onTouchStart.bind(this);
/**
* @property onTouchEnd
* @type Function
*/
this.onTouchEnd = this.onTouchEnd.bind(this);
/**
* @property onTouchMove
* @type Function
*/
this.onTouchMove = this.onTouchMove.bind(this);
/**
* @property last
* @type Number
*/
this.last = 0;
/**
* The css style of the cursor that is being used
* @property currentCursorStyle
* @type String
*/
this.currentCursorStyle = 'inherit';
/**
* Is set to true when the mouse is moved out of the canvas
* @property mouseOut
* @type Boolean
*/
this.mouseOut = false;
/**
* @property resolution
* @type Number
*/
this.resolution = 1;
};
// constructor
PIXI.InteractionManager.prototype.constructor = PIXI.InteractionManager;
/**
* Collects an interactive sprite recursively to have their interactions managed
*
* @method collectInteractiveSprite
* @param displayObject {DisplayObject} the displayObject to collect
* @param iParent {DisplayObject} the display object's parent
* @private
*/
PIXI.InteractionManager.prototype.collectInteractiveSprite = function(displayObject, iParent)
{
var children = displayObject.children;
var length = children.length;
// make an interaction tree... {item.__interactiveParent}
for (var i = length - 1; i >= 0; i--)
{
var child = children[i];
// push all interactive bits
if (child._interactive)
{
iParent.interactiveChildren = true;
//child.__iParent = iParent;
this.interactiveItems.push(child);
if (child.children.length > 0) {
this.collectInteractiveSprite(child, child);
}
}
else
{
child.__iParent = null;
if (child.children.length > 0)
{
this.collectInteractiveSprite(child, iParent);
}
}
}
};
/**
* Sets the target for event delegation
*
* @method setTarget
* @param target {WebGLRenderer|CanvasRenderer} the renderer to bind events to
* @private
*/
PIXI.InteractionManager.prototype.setTarget = function(target)
{
this.target = target;
this.resolution = target.resolution;
// Check if the dom element has been set. If it has don't do anything.
if (this.interactionDOMElement !== null) return;
this.setTargetDomElement (target.view);
};
/**
* Sets the DOM element which will receive mouse/touch events. This is useful for when you have other DOM
* elements on top of the renderers Canvas element. With this you'll be able to delegate another DOM element
* to receive those events
*
* @method setTargetDomElement
* @param domElement {DOMElement} the DOM element which will receive mouse and touch events
* @private
*/
PIXI.InteractionManager.prototype.setTargetDomElement = function(domElement)
{
this.removeEvents();
if (window.navigator.msPointerEnabled)
{
// time to remove some of that zoom in ja..
domElement.style['-ms-content-zooming'] = 'none';
domElement.style['-ms-touch-action'] = 'none';
}
this.interactionDOMElement = domElement;
domElement.addEventListener('mousemove', this.onMouseMove, true);
domElement.addEventListener('mousedown', this.onMouseDown, true);
domElement.addEventListener('mouseout', this.onMouseOut, true);
// aint no multi touch just yet!
domElement.addEventListener('touchstart', this.onTouchStart, true);
domElement.addEventListener('touchend', this.onTouchEnd, true);
domElement.addEventListener('touchmove', this.onTouchMove, true);
window.addEventListener('mouseup', this.onMouseUp, true);
};
/**
* @method removeEvents
* @private
*/
PIXI.InteractionManager.prototype.removeEvents = function()
{
if (!this.interactionDOMElement) return;
this.interactionDOMElement.style['-ms-content-zooming'] = '';
this.interactionDOMElement.style['-ms-touch-action'] = '';
this.interactionDOMElement.removeEventListener('mousemove', this.onMouseMove, true);
this.interactionDOMElement.removeEventListener('mousedown', this.onMouseDown, true);
this.interactionDOMElement.removeEventListener('mouseout', this.onMouseOut, true);
// aint no multi touch just yet!
this.interactionDOMElement.removeEventListener('touchstart', this.onTouchStart, true);
this.interactionDOMElement.removeEventListener('touchend', this.onTouchEnd, true);
this.interactionDOMElement.removeEventListener('touchmove', this.onTouchMove, true);
this.interactionDOMElement = null;
window.removeEventListener('mouseup', this.onMouseUp, true);
};
/**
* updates the state of interactive objects
*
* @method update
* @private
*/
PIXI.InteractionManager.prototype.update = function()
{
if (!this.target) return;
// frequency of 30fps??
var now = Date.now();
var diff = now - this.last;
diff = (diff * PIXI.INTERACTION_FREQUENCY ) / 1000;
if (diff < 1) return;
this.last = now;
var i = 0;
// ok.. so mouse events??
// yes for now :)
// OPTIMISE - how often to check??
if (this.dirty)
{
this.rebuildInteractiveGraph();
}
// loop through interactive objects!
var length = this.interactiveItems.length;
var cursor = 'inherit';
var over = false;
for (i = 0; i < length; i++)
{
var item = this.interactiveItems[i];
// OPTIMISATION - only calculate every time if the mousemove function exists..
// OK so.. does the object have any other interactive functions?
// hit-test the clip!
// if (item.mouseover || item.mouseout || item.buttonMode)
// {
// ok so there are some functions so lets hit test it..
item.__hit = this.hitTest(item, this.mouse);
this.mouse.target = item;
// ok so deal with interactions..
// looks like there was a hit!
if (item.__hit && !over)
{
if (item.buttonMode) cursor = item.defaultCursor;
if (!item.interactiveChildren)
{
over = true;
}
if (!item.__isOver)
{
if (item.mouseover)
{
item.mouseover (this.mouse);
}
item.__isOver = true;
}
}
else
{
if (item.__isOver)
{
// roll out!
if (item.mouseout)
{
item.mouseout (this.mouse);
}
item.__isOver = false;
}
}
}
if (this.currentCursorStyle !== cursor)
{
this.currentCursorStyle = cursor;
this.interactionDOMElement.style.cursor = cursor;
}
};
/**
* @method rebuildInteractiveGraph
* @private
*/
PIXI.InteractionManager.prototype.rebuildInteractiveGraph = function()
{
this.dirty = false;
var len = this.interactiveItems.length;
for (var i = 0; i < len; i++) {
this.interactiveItems[i].interactiveChildren = false;
}
this.interactiveItems = [];
if (this.stage.interactive)
{
this.interactiveItems.push(this.stage);
}
// Go through and collect all the objects that are interactive..
this.collectInteractiveSprite(this.stage, this.stage);
};
/**
* Is called when the mouse moves across the renderer element
*
* @method onMouseMove
* @param event {Event} The DOM event of the mouse moving
* @private
*/
PIXI.InteractionManager.prototype.onMouseMove = function(event)
{
if (this.dirty)
{
this.rebuildInteractiveGraph();
}
this.mouse.originalEvent = event;
// TODO optimize by not check EVERY TIME! maybe half as often? //
var rect = this.interactionDOMElement.getBoundingClientRect();
this.mouse.global.x = (event.clientX - rect.left) * (this.target.width / rect.width) / this.resolution;
this.mouse.global.y = (event.clientY - rect.top) * ( this.target.height / rect.height) / this.resolution;
var length = this.interactiveItems.length;
for (var i = 0; i < length; i++)
{
var item = this.interactiveItems[i];
// Call the function!
if (item.mousemove)
{
item.mousemove(this.mouse);
}
}
};
/**
* Is called when the mouse button is pressed down on the renderer element
*
* @method onMouseDown
* @param event {Event} The DOM event of a mouse button being pressed down
* @private
*/
PIXI.InteractionManager.prototype.onMouseDown = function(event)
{
if (this.dirty)
{
this.rebuildInteractiveGraph();
}
this.mouse.originalEvent = event;
if (PIXI.AUTO_PREVENT_DEFAULT)
{
this.mouse.originalEvent.preventDefault();
}
// loop through interaction tree...
// hit test each item! ->
// get interactive items under point??
//stage.__i
var length = this.interactiveItems.length;
var e = this.mouse.originalEvent;
var isRightButton = e.button === 2 || e.which === 3;
var downFunction = isRightButton ? 'rightdown' : 'mousedown';
var clickFunction = isRightButton ? 'rightclick' : 'click';
var buttonIsDown = isRightButton ? '__rightIsDown' : '__mouseIsDown';
var isDown = isRightButton ? '__isRightDown' : '__isDown';
// while
// hit test
for (var i = 0; i < length; i++)
{
var item = this.interactiveItems[i];
if (item[downFunction] || item[clickFunction])
{
item[buttonIsDown] = true;
item.__hit = this.hitTest(item, this.mouse);
if (item.__hit)
{
//call the function!
if (item[downFunction])
{
item[downFunction](this.mouse);
}
item[isDown] = true;
// just the one!
if (!item.interactiveChildren) break;
}
}
}
};
/**
* Is called when the mouse is moved out of the renderer element
*
* @method onMouseOut
* @param event {Event} The DOM event of a mouse being moved out
* @private
*/
PIXI.InteractionManager.prototype.onMouseOut = function(event)
{
if (this.dirty)
{
this.rebuildInteractiveGraph();
}
this.mouse.originalEvent = event;
var length = this.interactiveItems.length;
this.interactionDOMElement.style.cursor = 'inherit';
for (var i = 0; i < length; i++)
{
var item = this.interactiveItems[i];
if (item.__isOver)
{
this.mouse.target = item;
if (item.mouseout)
{
item.mouseout(this.mouse);
}
item.__isOver = false;
}
}
this.mouseOut = true;
// move the mouse to an impossible position
this.mouse.global.x = -10000;
this.mouse.global.y = -10000;
};
/**
* Is called when the mouse button is released on the renderer element
*
* @method onMouseUp
* @param event {Event} The DOM event of a mouse button being released
* @private
*/
PIXI.InteractionManager.prototype.onMouseUp = function(event)
{
if (this.dirty)
{
this.rebuildInteractiveGraph();
}
this.mouse.originalEvent = event;
var length = this.interactiveItems.length;
var up = false;
var e = this.mouse.originalEvent;
var isRightButton = e.button === 2 || e.which === 3;
var upFunction = isRightButton ? 'rightup' : 'mouseup';
var clickFunction = isRightButton ? 'rightclick' : 'click';
var upOutsideFunction = isRightButton ? 'rightupoutside' : 'mouseupoutside';
var isDown = isRightButton ? '__isRightDown' : '__isDown';
for (var i = 0; i < length; i++)
{
var item = this.interactiveItems[i];
if (item[clickFunction] || item[upFunction] || item[upOutsideFunction])
{
item.__hit = this.hitTest(item, this.mouse);
if (item.__hit && !up)
{
//call the function!
if (item[upFunction])
{
item[upFunction](this.mouse);
}
if (item[isDown])
{
if (item[clickFunction])
{
item[clickFunction](this.mouse);
}
}
if (!item.interactiveChildren)
{
up = true;
}
}
else
{
if (item[isDown])
{
if (item[upOutsideFunction]) item[upOutsideFunction](this.mouse);
}
}
item[isDown] = false;
}
}
};
/**
* Tests if the current mouse coordinates hit a sprite
*
* @method hitTest
* @param item {DisplayObject} The displayObject to test for a hit
* @param interactionData {InteractionData} The interactionData object to update in the case there is a hit
* @private
*/
PIXI.InteractionManager.prototype.hitTest = function(item, interactionData)
{
var global = interactionData.global;
if (!item.worldVisible)
{
return false;
}
// temp fix for if the element is in a non visible
var worldTransform = item.worldTransform, i,
a = worldTransform.a, b = worldTransform.b,
c = worldTransform.c, tx = worldTransform.tx,
d = worldTransform.d, ty = worldTransform.ty,
id = 1 / (a * d + c * -b),
x = d * id * global.x + -c * id * global.y + (ty * c - tx * d) * id,
y = a * id * global.y + -b * id * global.x + (-ty * a + tx * b) * id;
interactionData.target = item;
//a sprite or display object with a hit area defined
if (item.hitArea && item.hitArea.contains)
{
if (item.hitArea.contains(x, y))
{
interactionData.target = item;
return true;
}
return false;
}
// a sprite with no hitarea defined
else if(item instanceof PIXI.Sprite)
{
var width = item.texture.frame.width;
var height = item.texture.frame.height;
var x1 = -width * item.anchor.x;
var y1;
if (x > x1 && x < x1 + width)
{
y1 = -height * item.anchor.y;
if (y > y1 && y < y1 + height)
{
// set the target property if a hit is true!
interactionData.target = item;
return true;
}
}
}
else if(item instanceof PIXI.Graphics)
{
var graphicsData = item.graphicsData;
for (i = 0; i < graphicsData.length; i++)
{
var data = graphicsData[i];
if(!data.fill)continue;
// only deal with fills..
if(data.shape)
{
if(data.shape.contains(x, y))
{
interactionData.target = item;
return true;
}
}
}
}
var length = item.children.length;
for (i = 0; i < length; i++)
{
var tempItem = item.children[i];
var hit = this.hitTest(tempItem, interactionData);
if (hit)
{
// hmm.. TODO SET CORRECT TARGET?
interactionData.target = item;
return true;
}
}
return false;
};
/**
* Is called when a touch is moved across the renderer element
*
* @method onTouchMove
* @param event {Event} The DOM event of a touch moving across the renderer view
* @private
*/
PIXI.InteractionManager.prototype.onTouchMove = function(event)
{
if (this.dirty)
{
this.rebuildInteractiveGraph();
}
var rect = this.interactionDOMElement.getBoundingClientRect();
var changedTouches = event.changedTouches;
var touchData;
var i = 0;
for (i = 0; i < changedTouches.length; i++)
{
var touchEvent = changedTouches[i];
touchData = this.touches[touchEvent.identifier];
touchData.originalEvent = event;
// update the touch position
touchData.global.x = ( (touchEvent.clientX - rect.left) * (this.target.width / rect.width) ) / this.resolution;
touchData.global.y = ( (touchEvent.clientY - rect.top) * (this.target.height / rect.height) ) / this.resolution;
if (navigator.isCocoonJS && !rect.left && !rect.top && !event.target.style.width && !event.target.style.height)
{
//Support for CocoonJS fullscreen scale modes
touchData.global.x = touchEvent.clientX;
touchData.global.y = touchEvent.clientY;
}
for (var j = 0; j < this.interactiveItems.length; j++)
{
var item = this.interactiveItems[j];
if (item.touchmove && item.__touchData && item.__touchData[touchEvent.identifier])
{
item.touchmove(touchData);
}
}
}
};
/**
* Is called when a touch is started on the renderer element
*
* @method onTouchStart
* @param event {Event} The DOM event of a touch starting on the renderer view
* @private
*/
PIXI.InteractionManager.prototype.onTouchStart = function(event)
{
if (this.dirty)
{
this.rebuildInteractiveGraph();
}