661 lines
20 KiB
JavaScript
Executable File
661 lines
20 KiB
JavaScript
Executable File
/*!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($) {
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/**
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* Kontrol library
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*/
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"use strict";
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/**
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* Definition of globals and core
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*/
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var k = {}, // kontrol
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max = Math.max,
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min = Math.min;
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k.c = {};
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k.c.d = $(document);
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k.c.t = function (e) {
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return e.originalEvent.touches.length - 1;
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};
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/**
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* Kontrol Object
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*
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* Definition of an abstract UI control
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*
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* Each concrete component must call this one.
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* <code>
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* k.o.call(this);
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* </code>
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*/
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k.o = function () {
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var s = this;
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this.o = null; // array of options
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this.$ = null; // jQuery wrapped element
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this.i = null; // mixed HTMLInputElement or array of HTMLInputElement
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this.g = null; // 2D graphics context for 'pre-rendering'
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this.v = null; // value ; mixed array or integer
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this.cv = null; // change value ; not commited value
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this.x = 0; // canvas x position
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this.y = 0; // canvas y position
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this.$c = null; // jQuery canvas element
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this.c = null; // rendered canvas context
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this.t = 0; // touches index
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this.isInit = false;
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this.fgColor = null; // main color
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this.pColor = null; // previous color
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this.dH = null; // draw hook
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this.cH = null; // change hook
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this.eH = null; // cancel hook
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this.rH = null; // release hook
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this.run = function () {
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var cf = function (e, conf) {
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var k;
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for (k in conf) {
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s.o[k] = conf[k];
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}
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s.init();
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s._configure()
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._draw();
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};
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if(this.$.data('kontroled')) return;
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this.$.data('kontroled', true);
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this.extend();
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this.o = $.extend(
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{
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// Config
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min : this.$.data('min') || 0,
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max : this.$.data('max') || 100,
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stopper : true,
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readOnly : this.$.data('readonly'),
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// UI
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cursor : (this.$.data('cursor') === true && 30)
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|| this.$.data('cursor')
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|| 0,
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thickness : this.$.data('thickness') || 0.35,
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lineCap : this.$.data('linecap') || 'butt',
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width : this.$.data('width') || 200,
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height : this.$.data('height') || 200,
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displayInput : this.$.data('displayinput') == null || this.$.data('displayinput'),
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displayPrevious : this.$.data('displayprevious'),
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fgColor : this.$.data('fgcolor') || '#87CEEB',
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inputColor: this.$.data('inputcolor') || this.$.data('fgcolor') || '#87CEEB',
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inline : false,
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step : this.$.data('step') || 1,
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// Hooks
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draw : null, // function () {}
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change : null, // function (value) {}
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cancel : null, // function () {}
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release : null // function (value) {}
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}, this.o
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);
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// routing value
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if(this.$.is('fieldset')) {
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// fieldset = array of integer
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this.v = {};
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this.i = this.$.find('input')
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this.i.each(function(k) {
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var $this = $(this);
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s.i[k] = $this;
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s.v[k] = $this.val();
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$this.bind(
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'change'
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, function () {
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var val = {};
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val[k] = $this.val();
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s.val(val);
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}
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);
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});
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this.$.find('legend').remove();
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} else {
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// input = integer
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this.i = this.$;
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this.v = this.$.val();
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(this.v == '') && (this.v = this.o.min);
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this.$.bind(
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'change'
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, function () {
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s.val(s._validate(s.$.val()));
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}
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);
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}
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(!this.o.displayInput) && this.$.hide();
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this.$c = $('<canvas width="' +
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this.o.width + 'px" height="' +
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this.o.height + 'px"></canvas>');
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this.c = this.$c[0].getContext("2d");
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this.$
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.wrap($('<div style="' + (this.o.inline ? 'display:inline;' : '') +
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'width:' + this.o.width + 'px;height:' +
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this.o.height + 'px;"></div>'))
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.before(this.$c);
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if (this.v instanceof Object) {
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this.cv = {};
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this.copy(this.v, this.cv);
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} else {
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this.cv = this.v;
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}
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this.$
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.bind("configure", cf)
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.parent()
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.bind("configure", cf);
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this._listen()
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._configure()
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._xy()
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.init();
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this.isInit = true;
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this._draw();
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return this;
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};
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this._draw = function () {
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// canvas pre-rendering
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var d = true,
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c = document.createElement('canvas');
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c.width = s.o.width;
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c.height = s.o.height;
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s.g = c.getContext('2d');
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s.clear();
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s.dH
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&& (d = s.dH());
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(d !== false) && s.draw();
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s.c.drawImage(c, 0, 0);
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c = null;
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};
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this._touch = function (e) {
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var touchMove = function (e) {
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var v = s.xy2val(
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e.originalEvent.touches[s.t].pageX,
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e.originalEvent.touches[s.t].pageY
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);
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if (v == s.cv) return;
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if (
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s.cH
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&& (s.cH(v) === false)
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) return;
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s.change(s._validate(v));
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s._draw();
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};
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// get touches index
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this.t = k.c.t(e);
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// First touch
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touchMove(e);
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// Touch events listeners
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k.c.d
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.bind("touchmove.k", touchMove)
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.bind(
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"touchend.k"
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, function () {
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k.c.d.unbind('touchmove.k touchend.k');
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if (
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s.rH
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&& (s.rH(s.cv) === false)
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) return;
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s.val(s.cv);
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}
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);
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return this;
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};
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this._mouse = function (e) {
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var mouseMove = function (e) {
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var v = s.xy2val(e.pageX, e.pageY);
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if (v == s.cv) return;
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if (
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s.cH
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&& (s.cH(v) === false)
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) return;
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s.change(s._validate(v));
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s._draw();
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};
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// First click
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mouseMove(e);
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// Mouse events listeners
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k.c.d
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.bind("mousemove.k", mouseMove)
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.bind(
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// Escape key cancel current change
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"keyup.k"
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, function (e) {
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if (e.keyCode === 27) {
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k.c.d.unbind("mouseup.k mousemove.k keyup.k");
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if (
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s.eH
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&& (s.eH() === false)
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) return;
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s.cancel();
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}
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}
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)
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.bind(
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"mouseup.k"
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, function (e) {
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k.c.d.unbind('mousemove.k mouseup.k keyup.k');
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if (
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s.rH
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&& (s.rH(s.cv) === false)
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) return;
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s.val(s.cv);
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}
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);
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return this;
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};
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this._xy = function () {
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var o = this.$c.offset();
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this.x = o.left;
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this.y = o.top;
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return this;
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};
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this._listen = function () {
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if (!this.o.readOnly) {
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this.$c
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.bind(
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"mousedown"
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, function (e) {
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e.preventDefault();
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s._xy()._mouse(e);
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}
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)
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.bind(
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"touchstart"
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, function (e) {
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e.preventDefault();
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s._xy()._touch(e);
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}
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);
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this.listen();
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} else {
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this.$.attr('readonly', 'readonly');
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}
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return this;
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};
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this._configure = function () {
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// Hooks
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if (this.o.draw) this.dH = this.o.draw;
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if (this.o.change) this.cH = this.o.change;
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if (this.o.cancel) this.eH = this.o.cancel;
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if (this.o.release) this.rH = this.o.release;
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if (this.o.displayPrevious) {
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this.pColor = this.h2rgba(this.o.fgColor, "0.4");
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this.fgColor = this.h2rgba(this.o.fgColor, "0.6");
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} else {
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this.fgColor = this.o.fgColor;
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}
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return this;
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};
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this._clear = function () {
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this.$c[0].width = this.$c[0].width;
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};
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this._validate = function(v) {
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return (~~ (((v < 0) ? -0.5 : 0.5) + (v/this.o.step))) * this.o.step;
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};
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// Abstract methods
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this.listen = function () {}; // on start, one time
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this.extend = function () {}; // each time configure triggered
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this.init = function () {}; // each time configure triggered
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this.change = function (v) {}; // on change
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this.val = function (v) {}; // on release
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this.xy2val = function (x, y) {}; //
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this.draw = function () {}; // on change / on release
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this.clear = function () { this._clear(); };
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// Utils
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this.h2rgba = function (h, a) {
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var rgb;
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h = h.substring(1,7)
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rgb = [parseInt(h.substring(0,2),16)
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,parseInt(h.substring(2,4),16)
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,parseInt(h.substring(4,6),16)];
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return "rgba(" + rgb[0] + "," + rgb[1] + "," + rgb[2] + "," + a + ")";
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};
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this.copy = function (f, t) {
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for (var i in f) { t[i] = f[i]; }
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};
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};
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/**
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* k.Dial
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*/
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k.Dial = function () {
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k.o.call(this);
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this.startAngle = null;
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this.xy = null;
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this.radius = null;
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this.lineWidth = null;
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this.cursorExt = null;
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this.w2 = null;
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this.PI2 = 2*Math.PI;
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this.extend = function () {
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this.o = $.extend(
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{
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bgColor : this.$.data('bgcolor') || '#EEEEEE',
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angleOffset : this.$.data('angleoffset') || 0,
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angleArc : this.$.data('anglearc') || 360,
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inline : true
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}, this.o
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);
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};
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this.val = function (v) {
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if (null != v) {
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this.cv = this.o.stopper ? max(min(v, this.o.max), this.o.min) : v;
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this.v = this.cv;
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this.$.val(this.v);
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this._draw();
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} else {
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return this.v;
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}
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};
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this.xy2val = function (x, y) {
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var a, ret;
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a = Math.atan2(
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x - (this.x + this.w2)
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, - (y - this.y - this.w2)
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) - this.angleOffset;
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if(this.angleArc != this.PI2 && (a < 0) && (a > -0.5)) {
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// if isset angleArc option, set to min if .5 under min
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a = 0;
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} else if (a < 0) {
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a += this.PI2;
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}
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ret = ~~ (0.5 + (a * (this.o.max - this.o.min) / this.angleArc))
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+ this.o.min;
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this.o.stopper
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&& (ret = max(min(ret, this.o.max), this.o.min));
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return ret;
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};
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this.listen = function () {
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// bind MouseWheel
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var s = this,
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mw = function (e) {
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e.preventDefault();
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var ori = e.originalEvent
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,deltaX = ori.detail || ori.wheelDeltaX
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,deltaY = ori.detail || ori.wheelDeltaY
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,v = parseInt(s.$.val()) + (deltaX>0 || deltaY>0 ? s.o.step : deltaX<0 || deltaY<0 ? -s.o.step : 0);
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if (
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s.cH
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&& (s.cH(v) === false)
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) return;
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s.val(v);
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}
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, kval, to, m = 1, kv = {37:-s.o.step, 38:s.o.step, 39:s.o.step, 40:-s.o.step};
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this.$
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.bind(
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"keydown"
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,function (e) {
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var kc = e.keyCode;
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// numpad support
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if(kc >= 96 && kc <= 105) {
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kc = e.keyCode = kc - 48;
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}
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kval = parseInt(String.fromCharCode(kc));
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if (isNaN(kval)) {
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(kc !== 13) // enter
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&& (kc !== 8) // bs
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&& (kc !== 9) // tab
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&& (kc !== 189) // -
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&& e.preventDefault();
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// arrows
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if ($.inArray(kc,[37,38,39,40]) > -1) {
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e.preventDefault();
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var v = parseInt(s.$.val()) + kv[kc] * m;
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s.o.stopper
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&& (v = max(min(v, s.o.max), s.o.min));
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s.change(v);
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s._draw();
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// long time keydown speed-up
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to = window.setTimeout(
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function () { m*=2; }
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,30
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);
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}
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}
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}
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)
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.bind(
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"keyup"
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,function (e) {
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if (isNaN(kval)) {
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if (to) {
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window.clearTimeout(to);
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to = null;
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m = 1;
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s.val(s.$.val());
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}
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} else {
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// kval postcond
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(s.$.val() > s.o.max && s.$.val(s.o.max))
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|| (s.$.val() < s.o.min && s.$.val(s.o.min));
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}
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}
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);
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this.$c.bind("mousewheel DOMMouseScroll", mw);
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this.$.bind("mousewheel DOMMouseScroll", mw)
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};
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this.init = function () {
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if (
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this.v < this.o.min
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|| this.v > this.o.max
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) this.v = this.o.min;
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this.$.val(this.v);
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this.w2 = this.o.width / 2;
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this.cursorExt = this.o.cursor / 100;
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this.xy = this.w2;
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this.lineWidth = this.xy * this.o.thickness;
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this.lineCap = this.o.lineCap;
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this.radius = this.xy - this.lineWidth / 2;
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this.o.angleOffset
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&& (this.o.angleOffset = isNaN(this.o.angleOffset) ? 0 : this.o.angleOffset);
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this.o.angleArc
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&& (this.o.angleArc = isNaN(this.o.angleArc) ? this.PI2 : this.o.angleArc);
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// deg to rad
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this.angleOffset = this.o.angleOffset * Math.PI / 180;
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this.angleArc = this.o.angleArc * Math.PI / 180;
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// compute start and end angles
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this.startAngle = 1.5 * Math.PI + this.angleOffset;
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this.endAngle = 1.5 * Math.PI + this.angleOffset + this.angleArc;
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var s = max(
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String(Math.abs(this.o.max)).length
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, String(Math.abs(this.o.min)).length
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, 2
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) + 2;
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this.o.displayInput
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&& this.i.css({
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'width' : ((this.o.width / 2 + 4) >> 0) + 'px'
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,'height' : ((this.o.width / 3) >> 0) + 'px'
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,'position' : 'absolute'
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,'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.inputColor || 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, // context
|
|
a = this.angle(this.cv) // Angle
|
|
, sat = this.startAngle // Start angle
|
|
, eat = sat + a // End angle
|
|
, sa, ea // Previous angles
|
|
, r = 1;
|
|
|
|
c.lineWidth = this.lineWidth;
|
|
|
|
c.lineCap = this.lineCap;
|
|
|
|
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); |