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15 lines
8.5 KiB
15 lines
8.5 KiB
/*!jQuery Knob*/
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/**
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* Downward compatible, touchable dial
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*
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* Version: 1.2.0 (15/07/2012)
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* Requires: jQuery v1.7+
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*
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* Copyright (c) 2012 Anthony Terrien
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* Under MIT and GPL licenses:
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* http://www.opensource.org/licenses/mit-license.php
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* http://www.gnu.org/licenses/gpl.html
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*
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* Thanks to vor, eskimoblood, spiffistan, FabrizioC
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*/
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(function($){"use strict";var k={},max=Math.max,min=Math.min;k.c={};k.c.d=$(document);k.c.t=function(e){return e.originalEvent.touches.length-1};k.o=function(){var s=this;this.o=null;this.$=null;this.i=null;this.g=null;this.v=null;this.cv=null;this.x=0;this.y=0;this.$c=null;this.c=null;this.t=0;this.isInit=false;this.fgColor=null;this.pColor=null;this.dH=null;this.cH=null;this.eH=null;this.rH=null;this.usesExcanvas=typeof G_vmlCanvasManager!=="undefined";this.run=function(){var cf=function(e,conf){var k;for(k in conf){s.o[k]=conf[k]}s.init();s._configure()._draw()};if(this.$.data("kontroled"))return;this.$.data("kontroled",true);this.extend();this.o=$.extend({min:this.$.data("min")||0,max:this.$.data("max")||100,stopper:true,readOnly:this.$.data("readonly"),cursor:this.$.data("cursor")===true&&30||this.$.data("cursor")||0,thickness:this.$.data("thickness")||.35,width:this.$.data("width")||200,height:this.$.data("height")||200,displayInput:this.$.data("displayinput")==null||this.$.data("displayinput"),displayPrevious:this.$.data("displayprevious"),fgColor:this.$.data("fgcolor")||"#87CEEB",inline:false,draw:null,change:null,cancel:null,release:null},this.o);if(this.$.is("fieldset")){this.v={};this.i=this.$.find("input");this.i.each(function(k){var $this=$(this);s.i[k]=$this;s.v[k]=$this.val();$this.bind("change",function(){var val={};val[k]=$this.val();s.val(val)})});this.$.find("legend").remove()}else{this.i=this.$;this.v=this.$.val();this.v==""&&(this.v=this.o.min);this.$.bind("change",function(){s.val(s.$.val())})}!this.o.displayInput&&this.$.hide();this.$c=$(document.createElement("canvas")).attr({width:this.o.width,height:this.o.height});this.$.wrap($('<div style="'+(this.o.inline?"display:inline;":"")+"width:"+this.o.width+"px;height:"+this.o.height+'px;"></div>')).before(this.$c);if(typeof G_vmlCanvasManager!=="undefined"){G_vmlCanvasManager.initElement(this.$c[0])}if(this.usesExcanvas){G_vmlCanvasManager.initElement(this.$c[0])}this.c=this.$c[0].getContext("2d");if(this.v instanceof Object){this.cv={};this.copy(this.v,this.cv)}else{this.cv=this.v}this.$.bind("configure",cf).parent().bind("configure",cf);this._listen()._configure()._xy().init();this.isInit=true;this._draw();return this};this._draw=function(){var d=true;s.g=s.c;s.clear();s.dH&&(d=s.dH());d!==false&&s.draw()};this._touch=function(e){var touchMove=function(e){var v=s.xy2val(e.originalEvent.touches[s.t].pageX,e.originalEvent.touches[s.t].pageY);if(v==s.cv)return;if(s.cH&&s.cH(v)===false)return;s.change(v);s._draw()};this.t=k.c.t(e);touchMove(e);k.c.d.bind("touchmove.k",touchMove).bind("touchend.k",function(){k.c.d.unbind("touchmove.k touchend.k");if(s.rH&&s.rH(s.cv)===false)return;s.val(s.cv)});return this};this._mouse=function(e){var mouseMove=function(e){var v=s.xy2val(e.pageX,e.pageY);if(v==s.cv)return;if(s.cH&&s.cH(v)===false)return;s.change(v);s._draw()};mouseMove(e);k.c.d.bind("mousemove.k",mouseMove).bind("keyup.k",function(e){if(e.keyCode===27){k.c.d.unbind("mouseup.k mousemove.k keyup.k");if(s.eH&&s.eH()===false)return;s.cancel()}}).bind("mouseup.k",function(e){k.c.d.unbind("mousemove.k mouseup.k keyup.k");if(s.rH&&s.rH(s.cv)===false)return;s.val(s.cv)});return this};this._xy=function(){var o=this.$c.offset();this.x=o.left;this.y=o.top;return this};this._listen=function(){if(!this.o.readOnly){this.$c.bind("mousedown",function(e){e.preventDefault();s._xy()._mouse(e)}).bind("touchstart",function(e){e.preventDefault();s._xy()._touch(e)});this.listen()}else{this.$.attr("readonly","readonly")}return this};this._configure=function(){if(this.o.draw)this.dH=this.o.draw;if(this.o.change)this.cH=this.o.change;if(this.o.cancel)this.eH=this.o.cancel;if(this.o.release)this.rH=this.o.release;if(this.o.displayPrevious){this.pColor=this.h2rgba(this.o.fgColor,"0.4");this.fgColor=this.h2rgba(this.o.fgColor,"0.6")}else{this.fgColor=this.o.fgColor}return this};this._clear=function(){this.$c[0].width=this.$c[0].width};this.listen=function(){};this.extend=function(){};this.init=function(){};this.change=function(v){};this.val=function(v){};this.xy2val=function(x,y){};this.draw=function(){};this.clear=function(){this._clear()};this.h2rgba=function(h,a){var rgb;h=h.substring(1,7);rgb=[parseInt(h.substring(0,2),16),parseInt(h.substring(2,4),16),parseInt(h.substring(4,6),16)];return"rgba("+rgb[0]+","+rgb[1]+","+rgb[2]+","+a+")"};this.copy=function(f,t){for(var i in f){t[i]=f[i]}}};k.Dial=function(){k.o.call(this);this.startAngle=null;this.xy=null;this.radius=null;this.lineWidth=null;this.cursorExt=null;this.w2=null;this.PI2=2*Math.PI;this.extend=function(){this.o=$.extend({bgColor:this.$.data("bgcolor")||"#EEEEEE",angleOffset:this.$.data("angleoffset")||0,angleArc:this.$.data("anglearc")||360,inline:true},this.o)};this.val=function(v){if(null!=v){this.cv=this.o.stopper?max(min(v,this.o.max),this.o.min):v;this.v=this.cv;this.$.val(this.v);this._draw()}else{return this.v}};this.xy2val=function(x,y){var a,ret;a=Math.atan2(x-(this.x+this.w2),-(y-this.y-this.w2))-this.angleOffset;if(this.angleArc!=this.PI2&&a<0&&a>-.5){a=0}else if(a<0){a+=this.PI2}ret=~~(.5+a*(this.o.max-this.o.min)/this.angleArc)+this.o.min;this.o.stopper&&(ret=max(min(ret,this.o.max),this.o.min));return ret};this.listen=function(){var s=this,mw=function(e){e.preventDefault();var ori=e.originalEvent,deltaX=ori.detail||ori.wheelDeltaX,deltaY=ori.detail||ori.wheelDeltaY,v=parseInt(s.$.val()||s.o.min)+(deltaX>0||deltaY>0?1:deltaX<0||deltaY<0?-1:0);if(s.cH&&s.cH(v)===false)return;s.val(v)},kval,to,m=1,kv={37:-1,38:1,39:1,40:-1};this.$.bind("keydown",function(e){var kc=e.keyCode;if(kc>=96&&kc<=105){kc=e.keyCode=kc-48}kval=parseInt(String.fromCharCode(kc));if(isNaN(kval)){kc!==13&&kc!==8&&kc!==9&&kc!==189&&e.preventDefault();if($.inArray(kc,[37,38,39,40])>-1){e.preventDefault();var v=parseInt(s.$.val())+kv[kc]*m;s.o.stopper&&(v=max(min(v,s.o.max),s.o.min));s.change(v);s._draw();to=window.setTimeout(function(){m*=2},30)}}}).bind("keyup",function(e){if(isNaN(kval)){if(to){window.clearTimeout(to);to=null;m=1;s.val(s.$.val())}}else{s.$.val()>s.o.max&&s.$.val(s.o.max)||s.$.val()<s.o.min&&s.$.val(s.o.min)}});this.$c.bind("mousewheel DOMMouseScroll",mw);this.$.bind("mousewheel DOMMouseScroll",mw)};this.init=function(){if(this.v<this.o.min||this.v>this.o.max)this.v=this.o.min;this.$.val(this.v);this.w2=this.o.width/2;this.cursorExt=this.o.cursor/100;this.xy=this.w2;this.lineWidth=this.xy*this.o.thickness;this.radius=this.xy-this.lineWidth/2;this.o.angleOffset&&(this.o.angleOffset=isNaN(this.o.angleOffset)?0:this.o.angleOffset);this.o.angleArc&&(this.o.angleArc=isNaN(this.o.angleArc)?this.PI2:this.o.angleArc);this.angleOffset=this.o.angleOffset*Math.PI/180;this.angleArc=this.o.angleArc*Math.PI/180;this.startAngle=1.5*Math.PI+this.angleOffset;this.endAngle=1.5*Math.PI+this.angleOffset+this.angleArc;var s=max(String(Math.abs(this.o.max)).length,String(Math.abs(this.o.min)).length,2)+2;this.o.displayInput&&this.i.css({width:(this.o.width/2+4>>0)+"px",height:(this.o.width/3>>0)+"px",position:"absolute","vertical-align":"middle","margin-top":(this.o.width/3>>0)+"px","margin-left":"-"+(this.o.width*3/4+2>>0)+"px",border:0,background:"none",font:"bold "+(this.o.width/s>>0)+"px Arial","text-align":"center",color:this.o.fgColor,padding:"0px","-webkit-appearance":"none"})||this.i.css({width:"0px",visibility:"hidden"})};this.change=function(v){this.cv=v;this.$.val(v)};this.angle=function(v){return(v-this.o.min)*this.angleArc/(this.o.max-this.o.min)};this.draw=function(){var c=this.g,a=this.angle(this.cv),sat=this.startAngle,eat=sat+a,sa,ea,r=1;c.lineWidth=this.lineWidth;this.o.cursor&&(sat=eat-this.cursorExt)&&(eat=eat+this.cursorExt);c.beginPath();c.strokeStyle=this.o.bgColor;c.arc(this.xy,this.xy,this.radius,this.endAngle,this.startAngle,true);c.stroke();if(this.o.displayPrevious){ea=this.startAngle+this.angle(this.v);sa=this.startAngle;this.o.cursor&&(sa=ea-this.cursorExt)&&(ea=ea+this.cursorExt);c.beginPath();c.strokeStyle=this.pColor;c.arc(this.xy,this.xy,this.radius,sa,ea,false);c.stroke();r=this.cv==this.v}c.beginPath();c.strokeStyle=r?this.o.fgColor:this.fgColor;c.arc(this.xy,this.xy,this.radius,sat,eat,false);c.stroke()};this.cancel=function(){this.val(this.v)}};$.fn.dial=$.fn.knob=function(o){return this.each(function(){var d=new k.Dial;d.o=o;d.$=$(this);d.run()}).parent()}})(jQuery);
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