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Updated co-ords fix, added allways show, and release X,Y release postions. #37

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Updated co-ords fix, added allways show, and release X,Y release postions. #37

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b7a5b57
Used bes89 fix for Co-ords
Andrew-Parry Mar 24, 2017
9d4c6e7
Added stationary base support.
Andrew-Parry Mar 27, 2017
748192a
Added A update base funtion.
Andrew-Parry Mar 27, 2017
0c6c237
General tidy up and commenting
Andrew-Parry Mar 28, 2017
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210 changes: 131 additions & 79 deletions virtualjoystick.js
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Original file line number Diff line number Diff line change
Expand Up @@ -7,33 +7,42 @@ var VirtualJoystick = function(opts)
this._baseEl = opts.baseElement || this._buildJoystickBase();
this._mouseSupport = opts.mouseSupport !== undefined ? opts.mouseSupport : false;
this._stationaryBase = opts.stationaryBase || false;
this._baseX = this._stickX = opts.baseX || 0
this._baseY = this._stickY = opts.baseY || 0
this._limitStickTravel = opts.limitStickTravel || false
this._stickRadius = opts.stickRadius !== undefined ? opts.stickRadius : 100
this._useCssTransform = opts.useCssTransform !== undefined ? opts.useCssTransform : false

this._container.style.position = "relative"

this._container.appendChild(this._baseEl)
this._baseEl.style.position = "absolute"
this._baseEl.style.display = "none"
this._container.appendChild(this._stickEl)
this._stickEl.style.position = "absolute"
this._stickEl.style.display = "none"
this._baseX = this._stickX = opts.baseX || 0;
this._baseY = this._stickY = opts.baseY || 0;
this._limitStickTravel = opts.limitStickTravel || false;
this._stickRadius = opts.stickRadius !== undefined ? opts.stickRadius : 100;
this._useCssTransform = opts.useCssTransform !== undefined ? opts.useCssTransform : false;
this._show = opts.show || false;
this._releaseX = opts.releaseX !== undefined ? opts.releaseX : null;
this._releaseY = opts.releaseY !== undefined ? opts.releaseY : null;

this._container.style.position = "relative";
this._container.appendChild(this._baseEl);
this._baseEl.style.position = "absolute";
this._baseEl.style.display = "none";
this._container.appendChild(this._stickEl);
this._stickEl.style.position = "absolute";
this._stickEl.style.display = "none";

this._pressed = false;
this._touchIdx = null;

if(this._stationaryBase === true){
this._baseEl.style.display = "";
this._baseEl.style.left = (this._baseX - this._baseEl.width /2)+"px";
this._baseEl.style.top = (this._baseY - this._baseEl.height/2)+"px";
}

this._transform = this._useCssTransform ? this._getTransformProperty() : false;
this._has3d = this._check3D();


this._updatePositionOfContainer();
window.onresize = (function (joystick) {
return function () {
return joystick._updatePositionOfContainer();
}
})(this);

var __bind = function(fn, me){ return function(){ return fn.apply(me, arguments); }; };
this._$onTouchStart = __bind(this._onTouchStart , this);
this._$onTouchEnd = __bind(this._onTouchEnd , this);
Expand All @@ -48,9 +57,13 @@ var VirtualJoystick = function(opts)
this._container.addEventListener( 'mousedown' , this._$onMouseDown , false );
this._container.addEventListener( 'mouseup' , this._$onMouseUp , false );
this._container.addEventListener( 'mousemove' , this._$onMouseMove , false );
}
}
}

//////////////////////////////////////////////////////////////////////////////////
// //
//////////////////////////////////////////////////////////////////////////////////

VirtualJoystick.prototype.destroy = function()
{
this._container.removeChild(this._baseEl);
Expand Down Expand Up @@ -92,7 +105,7 @@ VirtualJoystick.touchScreenAvailable = function()
destObj.dispatchEvent = function(event /* , args... */){
if(this._events === undefined) this._events = {};
if( this._events[event] === undefined ) return;
var tmpArray = this._events[event].slice();
var tmpArray = this._events[event].slice();
for(var i = 0; i < tmpArray.length; i++){
var result = tmpArray[i].apply(this, Array.prototype.slice.call(arguments, 1))
if( result !== undefined ) return result;
Expand Down Expand Up @@ -122,99 +135,138 @@ VirtualJoystick.prototype.down = function(){
var deltaY = this.deltaY();
if( deltaY <= 0 ) return false;
if( Math.abs(deltaX) > 2*Math.abs(deltaY) ) return false;
return true;
return true;
}
VirtualJoystick.prototype.right = function(){
if( this._pressed === false ) return false;
var deltaX = this.deltaX();
var deltaY = this.deltaY();
if( deltaX <= 0 ) return false;
if( Math.abs(deltaY) > 2*Math.abs(deltaX) ) return false;
return true;
return true;
}
VirtualJoystick.prototype.left = function(){
if( this._pressed === false ) return false;
var deltaX = this.deltaX();
var deltaY = this.deltaY();
if( deltaX >= 0 ) return false;
if( Math.abs(deltaY) > 2*Math.abs(deltaX) ) return false;
return true;
return true;
}

//////////////////////////////////////////////////////////////////////////////////
// //
// Dealing with touches/mouse movents
//////////////////////////////////////////////////////////////////////////////////

VirtualJoystick.prototype._UpdateBase = function(){
this._move(this._baseEl.style, (this._baseX - this._baseEl.width /2), (this._baseY - this._baseEl.height/2));
}
VirtualJoystick.prototype._UpdateStick = function(){
this._move(this._stickEl.style, (this._stickX - this._stickEl.width /2), (this._stickY - this._stickEl.height/2));
}


VirtualJoystick.prototype._onUp = function()
{
this._pressed = false;
this._stickEl.style.display = "none";

if(this._stationaryBase == false){
this._baseEl.style.display = "none";

this._baseX = this._baseY = 0;
this._stickX = this._stickY = 0;
this._pressed = false;
this._show ? this._stickEl.style.display = "" : this._stickEl.style.display = "none";
if(!(this._stationaryBase || this._show)) { this._baseEl.style.display = "none"; }

if(this._releaseX !=null || this._releaseY !=null){
if (this._releaseX !=null){
this._stickX= this._baseX + this._releaseX;
}
if (this._releaseY !=null){
this._stickY= this._baseY + this._releaseY;
}
}
else {
this._stickX = this._baseX;
this._stickY = this._baseY;
}
this._UpdateStick()
}


VirtualJoystick.prototype._onDown = function(x, y)
{
this._pressed = true;
this._pressed = true;
if(this._stationaryBase == false){
this._baseX = x;
this._baseY = y;
this._baseEl.style.display = "";
this._move(this._baseEl.style, (this._baseX - this._baseEl.width /2), (this._baseY - this._baseEl.height/2));
this._UpdateBase()
}

this._stickX = x;
this._stickY = y;

if(this._limitStickTravel === true){
var deltaX = this.deltaX();
var deltaY = this.deltaY();
var stickDistance = Math.sqrt( (deltaX * deltaX) + (deltaY * deltaY) );
if(stickDistance > this._stickRadius){
var stickNormalizedX = deltaX / stickDistance;
var stickNormalizedY = deltaY / stickDistance;

this._stickX = stickNormalizedX * this._stickRadius + this._baseX;
this._stickY = stickNormalizedY * this._stickRadius + this._baseY;
}
}
}

this._stickEl.style.display = "";
this._move(this._stickEl.style, (this._stickX - this._stickEl.width /2), (this._stickY - this._stickEl.height/2));
this._UpdateStick()
}

VirtualJoystick.prototype._onMove = function(x, y)
{
if( this._pressed === true ){
this._stickX = x;
this._stickY = y;

if(this._limitStickTravel === true){
var deltaX = this.deltaX();
var deltaY = this.deltaY();
var stickDistance = Math.sqrt( (deltaX * deltaX) + (deltaY * deltaY) );
if(stickDistance > this._stickRadius){
var stickNormalizedX = deltaX / stickDistance;
var stickNormalizedY = deltaY / stickDistance;

this._stickX = stickNormalizedX * this._stickRadius + this._baseX;
this._stickY = stickNormalizedY * this._stickRadius + this._baseY;
}
}
}

this._move(this._stickEl.style, (this._stickX - this._stickEl.width /2), (this._stickY - this._stickEl.height/2));
}
this._UpdateStick()
}
}


//////////////////////////////////////////////////////////////////////////////////
// bind touch events (and mouse events for debug) //
// mouse events
//////////////////////////////////////////////////////////////////////////////////
// container offset.
VirtualJoystick.prototype._updatePositionOfContainer = function () {
var x = 0, y = 0;
var element = this._container;
if(this._stationaryBase === true){
this._UpdateBase()
while (element && !isNaN(element.offsetLeft) && !isNaN(element.offsetTop)) {
x += element.offsetLeft;
y += element.offsetTop;
element = element.offsetParent;
}
}
else {
while (element && !isNaN(element.offsetLeft) && !isNaN(element.offsetTop)) {
x += element.offsetLeft - element.scrollLeft;
y += element.offsetTop - element.scrollTop;
element = element.offsetParent;
}
}
this._containerX = x;
this._containerY = y;
}

VirtualJoystick.prototype._onMouseUp = function(event)
{
Expand All @@ -224,20 +276,20 @@ VirtualJoystick.prototype._onMouseUp = function(event)
VirtualJoystick.prototype._onMouseDown = function(event)
{
event.preventDefault();
var x = event.clientX;
var y = event.clientY;
var x = event.clientX - this._containerX;
var y = event.clientY - this._containerY;
return this._onDown(x, y);
}

VirtualJoystick.prototype._onMouseMove = function(event)
{
var x = event.clientX;
var y = event.clientY;
var x = event.clientX - this._containerX;
var y = event.clientY - this._containerY;
return this._onMove(x, y);
}

//////////////////////////////////////////////////////////////////////////////////
// comment //
// touch events //
//////////////////////////////////////////////////////////////////////////////////

VirtualJoystick.prototype._onTouchStart = function(event)
Expand All @@ -248,7 +300,7 @@ VirtualJoystick.prototype._onTouchStart = function(event)
// notify event for validation
var isValid = this.dispatchEvent('touchStartValidation', event);
if( isValid === false ) return;

// dispatch touchStart
this.dispatchEvent('touchStart', event);

Expand All @@ -259,8 +311,8 @@ VirtualJoystick.prototype._onTouchStart = function(event)
this._touchIdx = touch.identifier;

// forward the action
var x = touch.pageX;
var y = touch.pageY;
var x = touch.pageX - this._containerX;
var y = touch.pageY - this._containerY;
return this._onDown(x, y)
}

Expand All @@ -275,7 +327,7 @@ VirtualJoystick.prototype._onTouchEnd = function(event)
// try to find our touch event
var touchList = event.changedTouches;
for(var i = 0; i < touchList.length && touchList[i].identifier !== this._touchIdx; i++);
// if touch event isnt found,
// if touch event isnt found,
if( i === touchList.length) return;

// reset touchIdx - mark it as no-touch-in-progress
Expand All @@ -302,8 +354,8 @@ VirtualJoystick.prototype._onTouchMove = function(event)

event.preventDefault();

var x = touch.pageX;
var y = touch.pageY;
var x = touch.pageX - this._containerX;
var y = touch.pageY - this._containerY;
return this._onMove(x, y)
}

Expand All @@ -320,20 +372,20 @@ VirtualJoystick.prototype._buildJoystickBase = function()
var canvas = document.createElement( 'canvas' );
canvas.width = 126;
canvas.height = 126;

var ctx = canvas.getContext('2d');
ctx.beginPath();
ctx.strokeStyle = this._strokeStyle;
ctx.lineWidth = 6;
ctx.arc( canvas.width/2, canvas.width/2, 40, 0, Math.PI*2, true);
ctx.stroke();

ctx.beginPath();
ctx.strokeStyle = this._strokeStyle;
ctx.lineWidth = 2;
ctx.arc( canvas.width/2, canvas.width/2, 60, 0, Math.PI*2, true);
ctx.beginPath();
ctx.strokeStyle = this._strokeStyle;
ctx.lineWidth = 6;
ctx.arc( canvas.width/2, canvas.width/2, 40, 0, Math.PI*2, true);
ctx.stroke();


ctx.beginPath();
ctx.strokeStyle = this._strokeStyle;
ctx.lineWidth = 2;
ctx.arc( canvas.width/2, canvas.width/2, 60, 0, Math.PI*2, true);
ctx.stroke();

return canvas;
}

Expand All @@ -346,20 +398,20 @@ VirtualJoystick.prototype._buildJoystickStick = function()
canvas.width = 86;
canvas.height = 86;
var ctx = canvas.getContext('2d');
ctx.beginPath();
ctx.strokeStyle = this._strokeStyle;
ctx.lineWidth = 6;
ctx.arc( canvas.width/2, canvas.width/2, 40, 0, Math.PI*2, true);
ctx.beginPath();
ctx.strokeStyle = this._strokeStyle;
ctx.lineWidth = 6;
ctx.arc( canvas.width/2, canvas.width/2, 40, 0, Math.PI*2, true);
ctx.stroke();
return canvas;
}

//////////////////////////////////////////////////////////////////////////////////
// move using translate3d method with fallback to translate > 'top' and 'left'
// move using translate3d method with fallback to translate > 'top' and 'left'
// modified from https://github.com/component/translate and dependents
//////////////////////////////////////////////////////////////////////////////////

VirtualJoystick.prototype._move = function(style, x, y)
VirtualJoystick.prototype._move = function(style, x, y) // moves the top left of cavas to (x,y).
{
if (this._transform) {
if (this._has3d) {
Expand All @@ -373,7 +425,7 @@ VirtualJoystick.prototype._move = function(style, x, y)
}
}

VirtualJoystick.prototype._getTransformProperty = function()
VirtualJoystick.prototype._getTransformProperty = function()
{
var styles = [
'webkitTransform',
Expand All @@ -391,11 +443,11 @@ VirtualJoystick.prototype._getTransformProperty = function()
if (null != el.style[style]) {
return style;
}
}
}
}
VirtualJoystick.prototype._check3D = function()
{

VirtualJoystick.prototype._check3D = function()
{
var prop = this._getTransformProperty();
// IE8<= doesn't have `getComputedStyle`
if (!prop || !window.getComputedStyle) return module.exports = false;
Expand Down