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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,278 @@ | ||
| /* | ||
| Adapted from https://github.com/bobboteck/JoyStick | ||
| */ | ||
|
|
||
| let joy = (function() { | ||
| let defaults = { | ||
| /* IDs */ | ||
| /* Behaviours */ | ||
| auto_return : true, | ||
| /* Dimensions */ | ||
| canvas_width : 180, | ||
| canvas_height : 180, | ||
| radii_increment : 10, | ||
| internal_radius : (180 - (10 + 180/2))/2, | ||
| external_margin : 30, | ||
| max_margin : 5, | ||
| /* Styling */ | ||
| external_line : 2, | ||
| external_stroke : `rgba( 0, 128, 0, 1.00 )`, | ||
| internal_line : 2, | ||
| internal_stroke : `rgba( 0, 144, 13, 1.00 )`, | ||
| internal_fill : `rgba( 133, 14, 13, 1.00 )`, | ||
| } | ||
| let canvasTemplate = `<canvas id="ID_CANVAS" height="CANVAS_HEIGHT" width="CANVAS_WIDTH"></canvas>` | ||
|
|
||
| class JoyStick { | ||
| constructor(container, options, callback) { | ||
| // Memory | ||
| this.epx = 0 | ||
| this.epy = 0 | ||
| this.ipx = 0 | ||
| this.ipy = 0 | ||
| this.rx = 0 | ||
| this.ry = 0 | ||
| // These will be overwritten and define the thresholds for determining cardinality | ||
| this.pul = 1 | ||
| this.nul = -1 | ||
| this.psl = 1 | ||
| this.nsl = -1 | ||
| // IDs | ||
| this.id_container = container | ||
| this.id_canvas = options?.title ? options?.title : container + '-joystick' | ||
| // Representation | ||
| this.canvas_width = options?.width ? options?.width : defaults.canvas_width | ||
| this.canvas_height = options?.height ? options?.height : defaults.canvas_height | ||
| // these really shouldn't be messed with | ||
| this.radii_increment = defaults.radii_increment | ||
| this.external_margin = defaults.external_margin | ||
| this.max_margin = defaults.max_margin | ||
| // Representation (cont.) | ||
| this.ir = (this.canvas_width - (this.radii_increment + (this.canvas_width/2)))/2 | ||
| this.er = this.ir + defaults.external_margin | ||
| this.max = this.ir + defaults.max_margin | ||
| // Style | ||
| this.elw = options?.externalLineWidth ? options?.externalLineWidth : defaults.external_line | ||
| this.ess = options?.externalStrokeColor ? options?.externalStrokeColor : defaults.external_stroke | ||
| this.ilw = options?.internalLineWidth ? options?.internalLineWidth : defaults.internal_line | ||
| this.iss = options?.internalStrokeColor ? options?.internalStrokeColor : defaults.internal_stroke | ||
| this.ifi = options?.internalFillColor ? options?.internalFillColor : defaults.internal_fill | ||
| // Behaviour | ||
| this.auto_return = typeof options?.autoReturnToCenter != 'undefined' ? options?.autoReturnToCenter : defaults.auto_return | ||
| // Computational | ||
| this.toucher = null | ||
| this.mouser = false | ||
| this.callback = callback ? callback : function(){} | ||
|
|
||
| // OK, go. | ||
| this.prepare() | ||
| } | ||
| prepare() { | ||
| this.container = document.getElementById( this.id_container ) | ||
| this.renderCanvas() | ||
| this.render() | ||
| // Touch prep | ||
| if ('ontouchstart' in document.documentElement) { | ||
| this.canvas.addEventListener('touchstart', this.touch.bind(this), false) | ||
| document.addEventListener('touchmove', this.touching.bind(this), false) | ||
| document.addEventListener('touchend', this.touched.bind(this), false) | ||
| } else { | ||
| this.canvas.addEventListener('mousedown', this.mouse.bind(this), false) | ||
| document.addEventListener('mousemove', this.mousing.bind(this), false) | ||
| document.addEventListener('mouseup', this.moused.bind(this), false) | ||
| } | ||
| } | ||
| /* Drawing functions, no computations */ | ||
| renderCanvas() { | ||
| // Maximise size if width and height are unstipulated | ||
| if (this.canvas_width == 0) { this.canvas.width = this.container.clientWidth } | ||
| if (this.canvas_height == 0) { this.canvas.height = this.container.clientHeight } | ||
| // Inject the canvas | ||
| this.container.insertAdjacentHTML( `beforeend`, canvasTemplate | ||
| .replace( `ID_CANVAS`, this.id_canvas ) | ||
| .replace( `CANVAS_WIDTH`, this.canvas_width ) | ||
| .replace( `CANVAS_HEIGHT`, this.canvas_height ) | ||
| ) | ||
| // Shorthand references | ||
| this.canvas = document.getElementById( this.id_canvas ) | ||
| this.context = this.canvas.getContext('2d') | ||
|
|
||
| // Calculations: Radii | ||
| this.ir = (this.canvas.width - (this.radii_increment + (this.canvas.width/2)))/2 | ||
| this.er = this.ir + this.external_margin | ||
| this.max = this.ir + this.max_margin | ||
| // Calculations: Reference points | ||
| this.ipx = this.canvas.width / 2 | ||
| this.ipy = this.canvas.height / 2 | ||
| this.rx = this.ipx | ||
| this.ry = this.ipy | ||
| this.epx = this.ipx | ||
| this.epy = this.ipy | ||
| // Calculations: Cardinality thresholds | ||
| this.pul = this.canvas.width / 10 | ||
| this.nul = this.pul * -1 | ||
| this.psl = this.canvas.height / 10 | ||
| this.nsl = this.psl * -1 | ||
| } | ||
| // This will be the render called on loop | ||
| render() { | ||
| this.context.clearRect( 0, 0, this.canvas.width, this.canvas.height ) | ||
| this.renderOuter() | ||
| this.renderInner() | ||
| } | ||
| renderOuter() { | ||
| this.renderCircle( this.epx, this.epy, this.er, this.elw, this.ess ) | ||
| } | ||
| renderInner() { | ||
| this.renderCircle( this.ipx, this.ipy, this.ir, this.ilw, this.iss, true, this.rx, this.ry, this.ifi ) | ||
| } | ||
| // Conditional circle render | ||
| renderCircle( x, y, r = defaults.external_size, lw, ss, g, rx, ry, ifc = defaults.internalFillColor ) { | ||
| this.context.beginPath() | ||
| this.context.arc( rx ? rx : x, ry ? ry : y, r, 0, Math.PI * 2, false ) | ||
| this.context.lineWidth = lw | ||
| this.context.strokeStyle = ss | ||
| this.context.stroke() | ||
| if (g) { | ||
| let gd = this.context.createRadialGradient( x, y, 5, x, y, 200 ) | ||
| gd.addColorStop( 0, ifc ) | ||
| gd.addColorStop( 1, ss ) | ||
| this.context.fillStyle = gd | ||
| this.context.fill() | ||
| } | ||
| this.context.closePath() | ||
| } | ||
|
|
||
| /* Payload function */ | ||
| payload() { | ||
| return { | ||
| xPosition: this.rx, | ||
| yPosition: this.ry, | ||
| x : ((this.rx - this.ipx)/this.max * 100).toFixed(), | ||
| y : ((this.ry - this.ipy)/this.max * -100).toFixed(), | ||
| cardinalDirection: this.getCardinal(), | ||
| } | ||
| } | ||
| getCardinal() { | ||
| let outp = '' | ||
| let x = this.rx - this.ipx | ||
| let y = this.ry - this.ipy | ||
| if (y >= this.nul && y <= this.pul) { outp = 'C' } | ||
| if (y < this.nul) { outp = 'N' } | ||
| if (y > this.pul) { outp = 'S' } | ||
| if (x < this.nsl) { | ||
| if ( outp === 'C' ) { | ||
| outp = 'W' | ||
| } else { | ||
| outp += 'W' | ||
| } | ||
| } | ||
| if (x > this.psl) { | ||
| if ( outp === 'C' ) { | ||
| outp = 'E' | ||
| } else { | ||
| outp += 'E' | ||
| } | ||
| } | ||
| return outp | ||
| } | ||
|
|
||
| /* Touch functions */ | ||
| touch(e) { | ||
| this.toucher = e?.targetTouches[0]?.identifier | ||
| } | ||
| touching(e) { | ||
| // Failure conditions | ||
| if (!this.toucher) return | ||
| if (!e?.targetTouches[0]?.target == this.canvas) return | ||
|
|
||
| this.rx = e.targetTouches[0].pageX | ||
| this.ry = e.targetTouches[0].pageY | ||
| // Handle offset | ||
| if (this.canvas.offsetParent.tagName.toUpperCase() === 'BODY') { | ||
| this.rx -= this.canvas.offsetLeft | ||
| this.ry -= this.canvas.offsetTop | ||
| } else { | ||
| this.rx -= this.canvas.offsetParent.offsetLeft | ||
| this.ry -= this.canvas.offsetParent.offsetTop | ||
| } | ||
| // Place limitations | ||
| if (this.rx < this.ir) { this.rx = this.max } | ||
| if (this.ry < this.ir) { this.ry = this.max } | ||
| if (this.rx + this.ir > this.canvas.width ) { this.rx = this.canvas.width - this.max } | ||
| if (this.ry + this.ir > this.canvas.height) { this.ry = this.canvas.height - this.max } | ||
| // Render | ||
| this.render() | ||
| // Callback | ||
| this.callback(this.payload()) | ||
| } | ||
| touched(e) { | ||
| if (e?.changedTouches[0]?.identifier !== this.toucher) return | ||
| this.toucher = null | ||
| // Return to the origin | ||
| if (this.auto_return) { | ||
| this.rx = this.ipx | ||
| this.ry = this.ipy | ||
| } | ||
| // Render | ||
| this.render() | ||
| // Callback | ||
| this.callback(this.payload(), true) | ||
| } | ||
|
|
||
| /* Mouse functions */ | ||
| mouse(e) { | ||
| if (e.target.id == this.id_canvas) this.mouser = true | ||
| } | ||
| mousing(e) { | ||
| // Failure conditions | ||
| if (!this.mouser) return | ||
| if (e.target.id != this.id_canvas) return | ||
|
|
||
| this.rx = e.pageX | ||
| this.ry = e.pageY | ||
| // Handle offset | ||
| if (this.canvas.offsetParent.tagName.toUpperCase() === 'BODY') { | ||
| this.rx -= this.canvas.offsetLeft | ||
| this.ry -= this.canvas.offsetTop | ||
| } else { | ||
| this.rx -= this.canvas.offsetParent.offsetLeft | ||
| this.ry -= this.canvas.offsetParent.offsetTop | ||
| } | ||
| // Place limitations | ||
| if (this.rx < this.ir) { this.rx = this.max } | ||
| if (this.ry < this.ir) { this.ry = this.max } | ||
| if (this.rx + this.ir > this.canvas.width ) { this.rx = this.canvas.width - this.max } | ||
| if (this.ry + this.ir > this.canvas.height) { this.ry = this.canvas.height - this.max } | ||
| // Render | ||
| this.render() | ||
| // Callback | ||
| this.callback(this.payload()) | ||
| } | ||
| moused(e) { | ||
| if (e.target.id != this.id_canvas) return | ||
| this.mouser = false | ||
| // Return to the origin | ||
| if (this.auto_return) { | ||
| this.rx = this.ipx | ||
| this.ry = this.ipy | ||
| } | ||
| // Render | ||
| this.render() | ||
| // Callback | ||
| this.callback(this.payload(), true) | ||
| } | ||
|
|
||
| getX() { return this.x } | ||
| getY() { return this.y } | ||
| getDir() { return this.dir } | ||
| getWidth() { return this.canvas.width } | ||
| getHeight() { return this.canvas.height } | ||
| getOffsetX() { return this.offsetX } | ||
| getOffsetY() { return this.offsetY } | ||
| } | ||
|
|
||
| return { | ||
| stick: JoyStick, | ||
| } | ||
| })() |
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This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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