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ignore touch event if it does not originate from this joystick instance #36

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ignore touch event if it does not originate from this joystick instance #36

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16 changes: 16 additions & 0 deletions joy.js
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Original file line number Diff line number Diff line change
Expand Up @@ -115,6 +115,9 @@ var JoyStick = (function(container, parameters, callback)
var movedX=centerX;
var movedY=centerY;

var lastTouchPositionX = undefined;
var lastTouchPositionY = undefined;

// Check if the device support the touch or not
if("ontouchstart" in document.documentElement)
{
Expand Down Expand Up @@ -186,6 +189,10 @@ var JoyStick = (function(container, parameters, callback)
{
movedX = event.targetTouches[0].pageX;
movedY = event.targetTouches[0].pageY;

lastTouchPositionX = movedX
lastTouchPositionY = movedY

// Manage offset
if(canvas.offsetParent.tagName.toUpperCase() === "BODY")
{
Expand Down Expand Up @@ -215,6 +222,15 @@ var JoyStick = (function(container, parameters, callback)

function onTouchEnd(event)
{
if (!lastTouchPositionX ||
!lastTouchPositionY ||
(event.changedTouches.length > 0 &&
(event.changedTouches[0].pageX - lastTouchPositionX > 10 ||
event.changedTouches[0].pageY - lastTouchPositionY > 10)))
return

lastTouchPositionX = undefined
lastTouchPositionY = undefined
pressed = 0;
// If required reset position store variable
if(autoReturnToCenter)
Expand Down