401 lines
13 KiB
JavaScript
401 lines
13 KiB
JavaScript
/*jshint multistr:true, curly: false */
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/*global jQuery:false, define: false */
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/**
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* jRange - Awesome range control
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*
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* Written by
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* ----------
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* Nitin Hayaran (nitinhayaran@gmail.com)
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*
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* Licensed under the MIT (MIT-LICENSE.txt).
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*
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* @author Nitin Hayaran
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* @version 0.1-RELEASE
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*
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* Dependencies
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* ------------
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* jQuery (http://jquery.com)
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*
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**/
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;
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(function($, window, document, undefined) {
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'use strict';
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var jRange = function() {
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return this.init.apply(this, arguments);
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};
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jRange.prototype = {
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defaults: {
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onstatechange: function() {},
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ondragend: function() {},
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onbarclicked: function() {},
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isRange: false,
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showLabels: true,
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showScale: true,
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step: 1,
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format: '%s',
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theme: 'theme-green',
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width: 300,
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disable: false,
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snap: false
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},
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template: '<div class="slider-container">\
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<div class="back-bar">\
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<div class="selected-bar"></div>\
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<div class="pointer low"></div><div class="pointer-label low">123456</div>\
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<div class="pointer high"></div><div class="pointer-label high">456789</div>\
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<div class="clickable-dummy"></div>\
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</div>\
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<div class="scale"></div>\
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</div>',
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init: function(node, options) {
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this.options = $.extend({}, this.defaults, options);
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this.inputNode = $(node);
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this.options.value = this.inputNode.val() || (this.options.isRange ? this.options.from + ',' + this.options.from : this.options.from);
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this.domNode = $(this.template);
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this.domNode.addClass(this.options.theme);
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this.inputNode.after(this.domNode);
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this.domNode.on('change', this.onChange);
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this.pointers = $('.pointer', this.domNode);
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this.lowPointer = this.pointers.first();
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this.highPointer = this.pointers.last();
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this.labels = $('.pointer-label', this.domNode);
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this.lowLabel = this.labels.first();
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this.highLabel = this.labels.last();
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this.scale = $('.scale', this.domNode);
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this.bar = $('.selected-bar', this.domNode);
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this.clickableBar = this.domNode.find('.clickable-dummy');
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this.interval = this.options.to - this.options.from;
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this.render();
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},
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render: function() {
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// Check if inputNode is visible, and have some width, so that we can set slider width accordingly.
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if (this.inputNode.width() === 0 && !this.options.width) {
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console.log('jRange : no width found, returning');
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return;
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} else {
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this.options.width = this.options.width || this.inputNode.width();
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this.domNode.width(this.options.width);
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this.inputNode.hide();
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}
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if (this.isSingle()) {
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this.lowPointer.hide();
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this.lowLabel.hide();
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}
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if (!this.options.showLabels) {
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this.labels.hide();
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}
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this.attachEvents();
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if (this.options.showScale) {
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this.renderScale();
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}
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this.setValue(this.options.value);
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},
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isSingle: function() {
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if (typeof(this.options.value) === 'number') {
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return true;
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}
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return (this.options.value.indexOf(',') !== -1 || this.options.isRange) ?
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false : true;
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},
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attachEvents: function() {
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this.clickableBar.click($.proxy(this.barClicked, this));
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this.pointers.on('mousedown touchstart', $.proxy(this.onDragStart, this));
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this.pointers.bind('dragstart', function(event) {
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event.preventDefault();
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});
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},
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onDragStart: function(e) {
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if ( this.options.disable || (e.type === 'mousedown' && e.which !== 1)) {
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return;
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}
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e.stopPropagation();
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e.preventDefault();
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var pointer = $(e.target);
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this.pointers.removeClass('last-active');
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pointer.addClass('focused last-active');
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this[(pointer.hasClass('low') ? 'low' : 'high') + 'Label'].addClass('focused');
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$(document).on('mousemove.slider touchmove.slider', $.proxy(this.onDrag, this, pointer));
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$(document).on('mouseup.slider touchend.slider touchcancel.slider', $.proxy(this.onDragEnd, this));
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},
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onDrag: function(pointer, e) {
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e.stopPropagation();
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e.preventDefault();
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if (e.originalEvent.touches && e.originalEvent.touches.length) {
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e = e.originalEvent.touches[0];
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} else if (e.originalEvent.changedTouches && e.originalEvent.changedTouches.length) {
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e = e.originalEvent.changedTouches[0];
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}
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var position = e.clientX - this.domNode.offset().left;
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this.domNode.trigger('change', [this, pointer, position]);
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},
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onDragEnd: function(e) {
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this.pointers.removeClass('focused')
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.trigger('rangeslideend');
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this.labels.removeClass('focused');
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$(document).off('.slider');
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this.options.ondragend.call(this, this.options.value);
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},
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barClicked: function(e) {
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if(this.options.disable) return;
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var x = e.pageX - this.clickableBar.offset().left;
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if (this.isSingle())
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this.setPosition(this.pointers.last(), x, true, true);
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else {
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var firstLeft = Math.abs(parseFloat(this.pointers.first().css('left'), 10)),
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firstHalfWidth = this.pointers.first().width() / 2,
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lastLeft = Math.abs(parseFloat(this.pointers.last().css('left'), 10)),
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lastHalfWidth = this.pointers.first().width() / 2,
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leftSide = Math.abs(firstLeft - x + firstHalfWidth),
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rightSide = Math.abs(lastLeft - x + lastHalfWidth),
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pointer;
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if(leftSide == rightSide) {
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pointer = x < firstLeft ? this.pointers.first() : this.pointers.last();
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} else {
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pointer = leftSide < rightSide ? this.pointers.first() : this.pointers.last();
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}
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this.setPosition(pointer, x, true, true);
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}
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this.options.onbarclicked.call(this, this.options.value);
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},
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onChange: function(e, self, pointer, position) {
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var min, max;
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min = 0;
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max = self.domNode.width();
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if (!self.isSingle()) {
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min = pointer.hasClass('high') ? parseFloat(self.lowPointer.css("left")) + (self.lowPointer.width() / 2) : 0;
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max = pointer.hasClass('low') ? parseFloat(self.highPointer.css("left")) + (self.highPointer.width() / 2) : self.domNode.width();
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}
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var value = Math.min(Math.max(position, min), max);
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self.setPosition(pointer, value, true);
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},
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setPosition: function(pointer, position, isPx, animate) {
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var leftPos, rightPos,
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lowPos = parseFloat(this.lowPointer.css("left")),
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highPos = parseFloat(this.highPointer.css("left")) || 0,
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circleWidth = this.highPointer.width() / 2;
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if (!isPx) {
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position = this.prcToPx(position);
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}
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if(this.options.snap){
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var expPos = this.correctPositionForSnap(position);
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if(expPos === -1){
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return;
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}else{
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position = expPos;
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}
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}
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if (pointer[0] === this.highPointer[0]) {
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highPos = Math.round(position - circleWidth);
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} else {
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lowPos = Math.round(position - circleWidth);
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}
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pointer[animate ? 'animate' : 'css']({
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'left': Math.round(position - circleWidth)
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});
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if (this.isSingle()) {
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leftPos = 0;
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} else {
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leftPos = lowPos + circleWidth;
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rightPos = highPos + circleWidth;
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}
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var w = Math.round(highPos + circleWidth - leftPos);
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this.bar[animate ? 'animate' : 'css']({
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'width': Math.abs(w),
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'left': (w>0) ? leftPos : leftPos + w
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});
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this.showPointerValue(pointer, position, animate);
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this.isReadonly();
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},
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correctPositionForSnap: function(position){
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var currentValue = this.positionToValue(position) - this.options.from;
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var diff = this.options.width / (this.interval / this.options.step),
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expectedPosition = (currentValue / this.options.step) * diff;
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if( position <= expectedPosition + diff / 2 && position >= expectedPosition - diff / 2){
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return expectedPosition;
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}else{
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return -1;
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}
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},
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// will be called from outside
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setValue: function(value) {
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var values = value.toString().split(',');
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values[0] = Math.min(Math.max(values[0], this.options.from), this.options.to) + '';
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if (values.length > 1){
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values[1] = Math.min(Math.max(values[1], this.options.from), this.options.to) + '';
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}
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this.options.value = value;
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var prc = this.valuesToPrc(values.length === 2 ? values : [0, values[0]]);
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if (this.isSingle()) {
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this.setPosition(this.highPointer, prc[1]);
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} else {
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this.setPosition(this.lowPointer, prc[0]);
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this.setPosition(this.highPointer, prc[1]);
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}
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},
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renderScale: function() {
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var s = this.options.scale || [this.options.from, this.options.to];
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var prc = Math.round((100 / (s.length - 1)) * 10) / 10;
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var str = '';
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for (var i = 0; i < s.length; i++) {
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str += '<span style="left: ' + i * prc + '%">' + (s[i] != '|' ? '<ins>' + s[i] + '</ins>' : '') + '</span>';
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}
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this.scale.html(str);
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$('ins', this.scale).each(function() {
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$(this).css({
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marginLeft: -$(this).outerWidth() / 2
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});
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});
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},
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getBarWidth: function() {
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var values = this.options.value.split(',');
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if (values.length > 1) {
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return parseFloat(values[1]) - parseFloat(values[0]);
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} else {
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return parseFloat(values[0]);
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}
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},
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showPointerValue: function(pointer, position, animate) {
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var label = $('.pointer-label', this.domNode)[pointer.hasClass('low') ? 'first' : 'last']();
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var text;
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var value = this.positionToValue(position);
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// Is it higer or lower than it should be?
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if ($.isFunction(this.options.format)) {
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var type = this.isSingle() ? undefined : (pointer.hasClass('low') ? 'low' : 'high');
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text = this.options.format(value, type);
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} else {
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text = this.options.format.replace('%s', value);
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}
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var width = label.html(text).width(),
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left = position - width / 2;
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left = Math.min(Math.max(left, 0), this.options.width - width);
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label[animate ? 'animate' : 'css']({
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left: left
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});
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this.setInputValue(pointer, value);
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},
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valuesToPrc: function(values) {
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var lowPrc = ((parseFloat(values[0]) - parseFloat(this.options.from)) * 100 / this.interval),
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highPrc = ((parseFloat(values[1]) - parseFloat(this.options.from)) * 100 / this.interval);
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return [lowPrc, highPrc];
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},
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prcToPx: function(prc) {
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return (this.domNode.width() * prc) / 100;
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},
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isDecimal: function() {
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return ((this.options.value + this.options.from + this.options.to).indexOf(".")===-1) ? false : true;
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},
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positionToValue: function(pos) {
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var value = (pos / this.domNode.width()) * this.interval;
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value = parseFloat(value, 10) + parseFloat(this.options.from, 10);
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if (this.isDecimal()) {
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var final = Math.round(Math.round(value / this.options.step) * this.options.step *100)/100;
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if (final!==0.0) {
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final = '' + final;
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if (final.indexOf(".")===-1) {
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final = final + ".";
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}
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while (final.length - final.indexOf('.')<3) {
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final = final + "0";
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}
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} else {
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final = "0.00";
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}
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return final;
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} else {
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return Math.round(value / this.options.step) * this.options.step;
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}
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},
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setInputValue: function(pointer, v) {
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// if(!isChanged) return;
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if (this.isSingle()) {
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this.options.value = v.toString();
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} else {
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var values = this.options.value.split(',');
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if (pointer.hasClass('low')) {
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this.options.value = v + ',' + values[1];
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} else {
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this.options.value = values[0] + ',' + v;
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}
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}
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if (this.inputNode.val() !== this.options.value) {
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this.inputNode.val(this.options.value)
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.trigger('change');
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this.options.onstatechange.call(this, this.options.value);
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}
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},
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getValue: function() {
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return this.options.value;
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},
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getOptions: function() {
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return this.options;
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},
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getRange: function() {
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return this.options.from + "," + this.options.to;
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},
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isReadonly: function(){
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this.domNode.toggleClass('slider-readonly', this.options.disable);
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},
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disable: function(){
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this.options.disable = true;
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this.isReadonly();
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},
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enable: function(){
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this.options.disable = false;
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this.isReadonly();
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},
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toggleDisable: function(){
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this.options.disable = !this.options.disable;
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this.isReadonly();
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},
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updateRange: function(range, value) {
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var values = range.toString().split(',');
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this.interval = parseInt(values[1]) - parseInt(values[0]);
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if(value){
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this.setValue(value);
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}else{
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this.setValue(this.getValue());
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}
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}
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};
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var pluginName = 'jRange';
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// A really lightweight plugin wrapper around the constructor,
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// preventing against multiple instantiations
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$.fn[pluginName] = function(option) {
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var args = arguments,
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result;
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this.each(function() {
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var $this = $(this),
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data = $.data(this, 'plugin_' + pluginName),
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options = typeof option === 'object' && option;
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if (!data) {
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$this.data('plugin_' + pluginName, (data = new jRange(this, options)));
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$(window).resize(function() {
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data.setValue(data.getValue());
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}); // Update slider position when window is resized to keep it in sync with scale
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}
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// if first argument is a string, call silimarly named function
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// this gives flexibility to call functions of the plugin e.g.
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// - $('.dial').plugin('destroy');
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// - $('.dial').plugin('render', $('.new-child'));
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if (typeof option === 'string') {
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result = data[option].apply(data, Array.prototype.slice.call(args, 1));
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}
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});
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// To enable plugin returns values
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return result || this;
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};
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})(jQuery, window, document);
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