Description
This widget displays the current time as an analog clock
Usage:
In erb file:
<li data-row="1" data-col="1" data-sizex="1" data-sizey="1">
<div data-view="Myclock"></div>
</li>
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Last active
August 8, 2017 08:00
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Analog Clock
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| class Dashing.Myclock extends Dashing.Widget | |
| #CONSTANTS | |
| size = 286 | |
| pi = Math.PI | |
| radius = size/2 | |
| hourL = 0.5*radius | |
| minuteL = 0.75*radius | |
| secondL = 0.9*radius | |
| ready: -> | |
| setInterval(@drawTime,1000) | |
| drawTime: => | |
| #CLEAN | |
| $(@node).children("canvas").remove() | |
| #CURRENT TIME | |
| today = new Date() | |
| h = today.getHours() | |
| m = today.getMinutes() | |
| s = today.getSeconds() | |
| #CREATE CANVAS | |
| canvas = document.createElement('canvas') | |
| canvas.setAttribute('height',size) | |
| canvas.setAttribute('width',size) | |
| $(@node).append(canvas) | |
| content = canvas.getContext '2d' | |
| content.translate(radius,radius) | |
| #DRAW BACKGROUND | |
| content.beginPath() | |
| content.arc(0, 0, radius, 0, 2*pi, false) | |
| content.closePath() | |
| content.fillStyle = '#cccccc' | |
| content.fill() | |
| #draw numbers | |
| content.font = '12px Arial' | |
| content.fillStyle = '#000' | |
| content.textAlign = 'center' | |
| content.textBaseline = 'middle' | |
| n = 1 | |
| while n <= 12 | |
| theta = (n - 3) * pi * 2 / 12 | |
| x = radius * 0.9 * Math.cos(theta) | |
| y = radius * 0.9 * Math.sin(theta) | |
| content.fillText n, x, y | |
| n++ | |
| #draw second | |
| content.lineWidth='4' | |
| content.strokeStyle='rgb(255,0,0)' | |
| content.lineCap='round' | |
| content.beginPath() | |
| content.moveTo(0,0) | |
| alpha = (s-15)*pi*2/60 | |
| content.lineTo(secondL*Math.cos(alpha),secondL*Math.sin(alpha)) | |
| content.stroke() | |
| #draw minute | |
| content.strokeStyle='rgb(0,0,0)' | |
| content.lineWidth='6' | |
| content.lineCap='round' | |
| content.beginPath() | |
| content.moveTo(0,0) | |
| beta = (m-15)*pi*2/60 | |
| content.lineTo(minuteL*Math.cos(beta),minuteL*Math.sin(beta)) | |
| content.stroke() | |
| #draw hour | |
| content.lineWidth='8' | |
| content.lineCap='round' | |
| content.beginPath() | |
| content.moveTo(0,0) | |
| #Jumping Hours: | |
| #gamma = (h-3)*pi*2/12 | |
| #Smooth Hours: | |
| #gamma = ((h-3)+(m/60))*pi*2/12 | |
| gamma = ((h-3)+(m/60))*pi*2/12 | |
| content.lineTo(hourL*Math.cos(gamma),hourL*Math.sin(gamma)) | |
| content.stroke() |
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| <canvas id="clock"></canvas> |
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| // ---------------------------------------------------------------------------- | |
| // Widget-myclock styles | |
| // ---------------------------------------------------------------------------- | |
| .widget-myclock { | |
| background-color: rgba(0,0,0,0); | |
| } |
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