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Revision 1.1.0

- added support of mouswheel and arrow keys on input field / eskimoblood
- added the option to have ticks on the knob / spiffistan
  • Loading branch information...
commit d855f52db0882a93ad894c57962086a8b045a894 1 parent fb42a26
@aterrien authored
Showing with 285 additions and 5 deletions.
  1. +7 −5 index.html
  2. +278 −0 js/jquery.knob-1.1.0.js
View
12 index.html
@@ -3,11 +3,12 @@
<head>
<title>jQuery Knob demo</title>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.0/jquery.min.js"></script>
- <script src="js/jquery.knob-1.0.1.js"></script>
+ <script src="js/jquery.knob-1.1.0.js"></script>
<script>
$(function() {
- $(".knob").knob();
- /*$(".knob").knob(
+ $(".knob").dial();
+
+ /*$(".knob").dial(
{
'change':function(e){
console.log(e);
@@ -60,8 +61,9 @@
<pre>
data-cursor=true
data-skin="tron"
+data-ticks="8"
</pre>
- <input class="knob" data-cursor=true data-skin="tron" value="35">
+ <input class="knob" data-cursor=true data-skin="tron" data-ticks="8" value="35">
</div>
<div style="float:left;width:320px;height:300px;padding:20px">
<pre>
@@ -99,7 +101,7 @@
<input type="button" onclick="$('.knob-dyn2').knob();" value="knobify!">
<input type="text" class="knob-dyn2" data-width="50" value="56">
</div>
- <div style="border: 0 none; position: absolute; right: 0; top: 0;"><a href="https://github.com/aterrien" target="_blank"><img src="http://anthonyterrien.com/i/github-ribbon.png" style="border: 0 none;"></a></div>
+ <div style="border: 0 none; position: absolute; right: 0; top: 0;"><a href="https://github.com/aterrien" target="_blank"><img src="../i/github-ribbon.png" style="border: 0 none;"></a></div>
<script type="text/javascript">
var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'UA-3008949-6']);
View
278 js/jquery.knob-1.1.0.js
@@ -0,0 +1,278 @@
+/**
+ * Knob - jQuery Plugin
+ * Backward compatible, touchable dial
+ *
+ * Version: 1.1.0 (10/05/2012)
+ * Requires: jQuery v1.7+
+ *
+ * Copyright (c) 2011 Anthony Terrien
+ * Under MIT and GPL licenses:
+ * http://www.opensource.org/licenses/mit-license.php
+ * http://www.gnu.org/licenses/gpl.html
+ *
+ * Thanks to eskimoblood and spiffistan
+ */
+$(function() {
+
+ $.fn.knob = $.fn.dial = function( gopt ) {
+
+ return this.each(
+
+ function() {
+
+ var $this = $(this);
+
+ if( $this.data('dialed') ) return $this;
+ $this.data('dialed',true);
+
+ var opt = $.extend(
+ {
+ 'min' : $this.data('min') || 0
+ ,'max' : $this.data('max') || 100
+ ,'cursor' : $this.data('cursor')
+ ,'thickness' : $this.data('thickness') || .3
+ ,'width' : $this.data('width') || 200
+ ,'displayInput' : $this.data('displayinput')==null || $this.data('displayinput')
+ ,'fgColor' : $this.data('fgcolor') || '#87CEEB' //#222222'
+ ,'bgColor' : $this.data('bgcolor') || '#EEEEEE'
+ ,'tickColor' : $this.data('tickColor') || $this.data('fgcolor') || '#DDDDDD'
+ ,'ticks' : $this.data('ticks') || 0
+ ,'tickLength' : $this.data('tickLength') || 0
+ ,'tickWidth' : $this.data('tickWidth') || 0.02
+ ,'tickColorizeValues' : $this.data('tickColorizeValues') || true
+ ,'readOnly' : $this.data('readonly')
+ ,'skin' : $this.data('skin') || 'default'
+ ,'draw' :
+ /**
+ * @param int a angle
+ * @param int v current value
+ * @param array opt plugin options
+ * @param context ctx Canvas context 2d
+ */
+ function( a, v, opt, ctx ) {
+ var sa = 1.5*Math.PI // Start angle
+ ,ea = sa+a // End angle
+ ,r = opt.width/2 // Radius
+ ,lw = r*opt.thickness; // Line width
+
+ ctx.clearRect(0, 0, opt.width, opt.width);
+ ctx.lineWidth = lw;
+
+ opt.cursor
+ && ( sa = ea-0.3 )
+ && ( ea = ea+0.3 );
+
+ var ticks = opt.ticks;
+ var tl = opt.tickLength;
+ var tw = opt.tickWidth;
+
+ for(tick = 0; tick < ticks; tick++) {
+
+ ctx.beginPath();
+
+ if(a > (((2 * Math.PI) / ticks) * tick) && opt.tickColorizeValues) {
+ ctx.strokeStyle = opt.fgColor;
+ }else{
+ ctx.strokeStyle = opt.tickColor;
+ }
+
+ var tick_sa = (((2 * Math.PI) / ticks) * tick) - (0.5 * Math.PI);
+ ctx.arc( r, r, r-lw-tl, tick_sa, tick_sa + tw , false);
+ ctx.stroke();
+ }
+
+ ctx.beginPath();
+ ctx.strokeStyle = opt.fgColor;
+ ctx.arc( r, r, r-lw, sa, ea, false);
+ ctx.stroke();
+
+ switch(opt.skin){
+
+ case 'default' :
+ ctx.beginPath();
+ ctx.strokeStyle = opt.bgColor;
+ ctx.arc(
+ r, r, r-lw ,sa
+ ,(v==opt.min && !opt.cursor)
+ ? sa+0.0001
+ : ea
+ , true
+ );
+ ctx.stroke();
+ break;
+
+ case 'tron' :
+ ctx.lineWidth = 2;
+ ctx.beginPath();
+ ctx.strokeStyle = opt.fgColor;
+ ctx.arc( r, r, r-lw+1+lw*2/3, 0, 2*Math.PI, false);
+ ctx.stroke();
+ break;
+ }
+ }
+ ,'change' :
+ /**
+ * @param int v Current value
+ */
+ function(v) {}
+ ,'release' :
+ /**
+ * @param int v Current value
+ * @param jQuery ipt Input
+ */
+ function(v,ipt) {}
+ }
+ ,gopt
+ );
+
+ var c = $('<canvas width="'+opt.width+'" height="'+opt.width+'"></canvas>')
+ ,wd = $('<div style=width:'+opt.width+'px;display:inline;"></div>')
+ ,k;
+
+ $this.wrap( wd ).before( c );
+
+ opt.displayInput
+ && $this.css(
+ {
+ 'width' : opt.width/2+'px'
+ ,'position' : 'absolute'
+ ,'margin-top' : (opt.width*5/13)+'px'
+ ,'margin-left' : '-'+3*opt.width/4+'px'
+ ,'font-size' : opt.width/5+'px'
+ ,'border' : 'none'
+ ,'background' : 'none'
+ ,'font-family' : 'Arial'
+ ,'font-weight' : 'bold'
+ ,'text-align' : 'center'
+ ,'color' : opt.fgColor
+ ,'padding' : '0px'
+ ,'-webkit-appearance': 'none'
+ }
+ )
+ || $this.css(
+ {
+ 'width' : '0px'
+ , 'visibility' : 'hidden'
+ }
+ );
+
+ k = new Knob( c, opt );
+ k.onRelease = function(v) {
+ opt.release(v,$this);
+ };
+ k.val( parseInt($this.val()) || 0 );
+ k.onChange = function(v) {
+ $this.val(v);
+ opt.change(v);
+ };
+
+ // bind change on input
+ $this.bind(
+ 'change'
+ ,function( e ) {
+ k.val( $this.val() );
+ }
+ );
+
+ if( !opt.readOnly ){
+ c.bind(
+ "mousedown touchstart"
+ ,function( e ) {
+ e.preventDefault();
+ k.startDrag( e );
+ }
+ );
+ }else{
+ $this.attr('readonly','readonly');
+ }
+
+ var keys={37: -1, 38:1, 39:1, 40: -1}
+ $this.keydown(function(event){
+ setVal( keys[event.keyCode]);
+ event.preventDefault();
+ });
+
+ $this.bind('mousewheel DOMMouseScroll', function(event){
+ var originalEvent = event.originalEvent;
+ var deltaX = originalEvent.detail || originalEvent.wheelDeltaX;
+ var deltaY = originalEvent.detail || originalEvent.wheelDeltaY;
+ setVal( deltaX > 0 || deltaY > 0 ? 1 : deltaX < 0 || deltaY < 0 ? -1 : 0);
+ event.preventDefault();
+ });
+
+ function setVal(dir){
+ if(dir){
+ k.val( parseInt($this.val()) + dir );
+ }
+ }
+ }
+ ).parent();
+ }
+
+ Knob = function( c, opt ) {
+
+ var v = null
+ ,ctx = c[0].getContext("2d")
+ ,a = Math.PI*0.0001
+ ,PI2 = 2*Math.PI
+ ,mx ,my ,x ,y
+ ,_self = this;
+
+ this.onChange = function() {}
+ this.onRelease = function() {}
+
+ this.val = function(_v) {
+ if(null!=_v){
+ if( v==_v ) return;
+ v=_v;
+ this.onChange(_v);
+ a = (_v-opt.min)*PI2/(opt.max-opt.min);
+ opt.draw( a, _v, opt, ctx );
+ }else{
+ var b = a = Math.atan2( mx-x, -(my-y-opt.width/2) );
+ (a<0) && (b=a+PI2);
+ _v = Math.round( b*(opt.max-opt.min)/PI2 ) + opt.min;
+ return ( _v>opt.max ) ? opt.max : _v;
+ }
+ }
+
+ this.capture = function(e) {
+ switch( e.type ){
+ case 'mousemove' :
+ case 'mousedown' :
+ mx = e.pageX;
+ my = e.pageY;
+ break;
+ case 'touchmove' :
+ case 'touchstart' :
+ mx = e.originalEvent.touches[0].pageX;
+ my = e.originalEvent.touches[0].pageY;
+ break;
+ }
+ this.val( this.val() );
+ }
+
+ this.startDrag = function(e) {
+
+ var p = c.position();
+ x = p.left+(opt.width/2);
+ y = p.top;
+
+ this.capture(e);
+
+ $(document).bind(
+ "mousemove.dial touchmove.dial"
+ ,function(e) {
+ _self.capture(e);
+ }
+ )
+ .bind(
+ "mouseup.dial touchend.dial"
+ ,function() {
+ $(document).unbind('mousemove.dial touchmove.dial mouseup.dial touchend.dial');
+ _self.onRelease(v);
+ }
+ );
+ }
+ }
+});
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