/**
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* slider 滑块组件
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*/
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layui.define(['jquery', 'lay'], function(exports){
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'use strict';
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var $ = layui.$;
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var lay = layui.lay;
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// 外部接口
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var slider = {
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config: {}
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,index: layui.slider ? (layui.slider.index + 10000) : 0
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// 设置全局项
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,set: function(options){
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var that = this;
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that.config = $.extend({}, that.config, options);
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return that;
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}
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// 事件
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,on: function(events, callback){
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return layui.onevent.call(this, MOD_NAME, events, callback);
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}
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};
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// 操作当前实例
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var thisSlider = function(){
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var that = this
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,options = that.config;
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return {
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setValue: function(value, index){ // 设置值
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value = value > options.max ? options.max : value;
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value = value < options.min ? options.min : value;
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options.value = value;
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return that.slide('set', value, index || 0);
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}
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,config: options
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}
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};
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// 字符常量
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var MOD_NAME = 'slider';
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var DISABLED = 'layui-disabled';
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var ELEM_VIEW = 'layui-slider';
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var SLIDER_BAR = 'layui-slider-bar';
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var SLIDER_WRAP = 'layui-slider-wrap';
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var SLIDER_WRAP_BTN = 'layui-slider-wrap-btn';
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var SLIDER_TIPS = 'layui-slider-tips';
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var SLIDER_INPUT = 'layui-slider-input';
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var SLIDER_INPUT_TXT = 'layui-slider-input-txt';
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var SLIDER_INPUT_BTN = 'layui-slider-input-btn';
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var ELEM_HOVER = 'layui-slider-hover';
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// 构造器
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var Class = function(options){
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var that = this;
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that.index = ++slider.index;
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that.config = $.extend({}, that.config, slider.config, options);
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that.render();
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};
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// 默认配置
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Class.prototype.config = {
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type: 'default' //滑块类型，垂直：vertical
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,min: 0 //最小值
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,max: 100 //最大值，默认100
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,value: 0 //初始值，默认为0
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,step: 1 //间隔值
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,showstep: false //间隔点开启
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,tips: true //文字提示，开启
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,input: false //输入框，关闭
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,range: false //范围选择，与输入框不能同时开启，默认关闭
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,height: 200 //配合 type:"vertical" 使用，默认200px
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,disabled: false //滑块禁用，默认关闭
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,theme: '#009688' //主题颜色
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};
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//滑块渲染
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Class.prototype.render = function(){
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var that = this;
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var options = that.config;
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// 若 elem 非唯一，则拆分为多个实例
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var elem = $(options.elem);
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if(elem.length > 1){
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layui.each(elem, function(){
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slider.render($.extend({}, options, {
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elem: this
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}));
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});
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return that;
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}
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// 合并 lay-options 属性上的配置信息
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$.extend(options, lay.options(elem[0]));
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//间隔值不能小于 1
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if(options.step < 1) options.step = 1;
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//最大值不能小于最小值
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if(options.max < options.min) options.max = options.min + options.step;
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//判断是否开启双滑块
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if(options.range){
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options.value = typeof(options.value) == 'object' ? options.value : [options.min, options.value];
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var minValue = Math.min(options.value[0], options.value[1])
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,maxValue = Math.max(options.value[0], options.value[1]);
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options.value[0] = minValue > options.min ? minValue : options.min;
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options.value[1] = maxValue > options.min ? maxValue : options.min;
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options.value[0] = options.value[0] > options.max ? options.max : options.value[0];
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options.value[1] = options.value[1] > options.max ? options.max : options.value[1];
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var scaleFir = Math.floor((options.value[0] - options.min) / (options.max - options.min) * 100)
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,scaleSec = Math.floor((options.value[1] - options.min) / (options.max - options.min) * 100)
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,scale = scaleSec - scaleFir + '%';
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scaleFir = scaleFir + '%';
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scaleSec = scaleSec + '%';
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} else {
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//如果初始值是一个数组，则获取数组的最小值
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if(typeof options.value == 'object'){
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options.value = Math.min.apply(null, options.value);
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}
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//初始值不能小于最小值且不能大于最大值
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if(options.value < options.min) options.value = options.min;
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if(options.value > options.max) options.value = options.max;
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var scale = Math.floor((options.value - options.min) / (options.max - options.min) * 100) + '%';
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};
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//如果禁用，颜色为统一的灰色
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var theme = options.disabled ? '#c2c2c2' : options.theme;
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//滑块
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var temp = '<div class="layui-slider '+ (options.type === 'vertical' ? 'layui-slider-vertical' : '') +'">'+ (options.tips ? '<div class="'+ SLIDER_TIPS +'"></div>' : '') +
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'<div class="layui-slider-bar" style="background:'+ theme +'; '+ (options.type === 'vertical' ? 'height' : 'width') +':'+ scale +';'+ (options.type === 'vertical' ? 'bottom' : 'left') +':'+ (scaleFir || 0) +';"></div><div class="layui-slider-wrap" style="'+ (options.type === 'vertical' ? 'bottom' : 'left') +':'+ (scaleFir || scale) +';">' +
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'<div class="layui-slider-wrap-btn" style="border: 2px solid '+ theme +';"></div></div>'+ (options.range ? '<div class="layui-slider-wrap" style="'+ (options.type === 'vertical' ? 'bottom' : 'left') +':'+ scaleSec +';"><div class="layui-slider-wrap-btn" style="border: 2px solid '+ theme +';"></div></div>' : '') +'</div>';
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var othis = $(options.elem)
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,hasRender = othis.next('.' + ELEM_VIEW);
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//生成替代元素
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hasRender[0] && hasRender.remove(); //如果已经渲染，则Rerender
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that.elemTemp = $(temp);
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//把数据缓存到滑块上
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if(options.range){
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that.elemTemp.find('.' + SLIDER_WRAP).eq(0).data('value', options.value[0]);
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that.elemTemp.find('.' + SLIDER_WRAP).eq(1).data('value', options.value[1]);
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}else{
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that.elemTemp.find('.' + SLIDER_WRAP).data('value', options.value);
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};
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//插入替代元素
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othis.html(that.elemTemp);
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//垂直滑块
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if(options.type === 'vertical'){
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that.elemTemp.height(options.height + 'px');
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};
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//显示间断点
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if(options.showstep){
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var number = (options.max - options.min) / options.step, item = '';
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for(var i = 1; i < number + 1; i++) {
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var step = i * 100 / number;
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if(step < 100){
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item += '<div class="layui-slider-step" style="'+ (options.type === 'vertical' ? 'bottom' : 'left') +':'+ step +'%"></div>'
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}
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};
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that.elemTemp.append(item);
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};
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//插入输入框
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if(options.input && !options.range){
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var elemInput = $('<div class="layui-slider-input layui-input"><div class="layui-slider-input-txt"><input type="text" class="layui-input"></div><div class="layui-slider-input-btn"><i class="layui-icon layui-icon-up"></i><i class="layui-icon layui-icon-down"></i></div></div>');
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othis.css("position","relative");
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othis.append(elemInput);
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othis.find('.' + SLIDER_INPUT_TXT).children('input').val(options.value);
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if(options.type === 'vertical'){
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elemInput.css({
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left: 0
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,top: -48
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});
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} else {
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that.elemTemp.css("margin-right", elemInput.outerWidth() + 15);
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}
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};
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//给未禁止的滑块滑动事件
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if(!options.disabled){
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that.slide();
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}else{
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that.elemTemp.addClass(DISABLED);
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that.elemTemp.find('.' + SLIDER_WRAP_BTN).addClass(DISABLED);
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};
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//划过滑块显示数值
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var timer;
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that.elemTemp.find('.' + SLIDER_WRAP_BTN).on('mouseover', function(){
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var sliderWidth = options.type === 'vertical' ? options.height : that.elemTemp[0].offsetWidth
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,sliderWrap = that.elemTemp.find('.' + SLIDER_WRAP)
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,tipsLeft = options.type === 'vertical' ? (sliderWidth - $(this).parent()[0].offsetTop - sliderWrap.height()) : $(this).parent()[0].offsetLeft
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,left = tipsLeft / sliderWidth * 100
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,value = $(this).parent().data('value')
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,tipsTxt = options.setTips ? options.setTips(value) : value;
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that.elemTemp.find('.' + SLIDER_TIPS).html(tipsTxt);
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clearTimeout(timer);
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timer = setTimeout(function(){
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if(options.type === 'vertical'){
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that.elemTemp.find('.' + SLIDER_TIPS).css({
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"bottom": left + '%',
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"margin-bottom": "20px",
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"display": "inline-block"
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});
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} else {
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that.elemTemp.find('.' + SLIDER_TIPS).css({
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"left": left + '%',
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"display": "inline-block"
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});
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};
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}, 300);
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}).on('mouseout', function(){
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clearTimeout(timer);
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that.elemTemp.find('.' + SLIDER_TIPS).css("display", "none");
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});
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};
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//滑块滑动
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Class.prototype.slide = function(setValue, value, i){
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var that = this
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,options = that.config
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,sliderAct = that.elemTemp
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,sliderWidth = function(){
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return options.type === 'vertical' ? options.height : sliderAct[0].offsetWidth
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}
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,sliderWrap = sliderAct.find('.' + SLIDER_WRAP)
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,sliderTxt = sliderAct.next('.' + SLIDER_INPUT)
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,inputValue = sliderTxt.children('.' + SLIDER_INPUT_TXT).children('input').val()
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,step = 100 / ((options.max - options.min) / Math.ceil(options.step))
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,change = function(offsetValue, index, from){
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if(Math.ceil(offsetValue) * step > 100){
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offsetValue = Math.ceil(offsetValue) * step
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}else{
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offsetValue = Math.round(offsetValue) * step
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};
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offsetValue = offsetValue > 100 ? 100: offsetValue;
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offsetValue = offsetValue < 0 ? 0: offsetValue;
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sliderWrap.eq(index).css((options.type === 'vertical' ?'bottom':'left'), offsetValue + '%');
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var firLeft = valueTo(sliderWrap[0].offsetLeft)
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,secLeft = options.range ? valueTo(sliderWrap[1].offsetLeft) : 0;
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if(options.type === 'vertical'){
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sliderAct.find('.' + SLIDER_TIPS).css({"bottom":offsetValue + '%', "margin-bottom":"20px"});
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firLeft = valueTo(sliderWidth() - sliderWrap[0].offsetTop - sliderWrap.height());
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secLeft = options.range ? valueTo(sliderWidth() - sliderWrap[1].offsetTop - sliderWrap.height()) : 0;
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}else{
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sliderAct.find('.' + SLIDER_TIPS).css("left",offsetValue + '%');
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};
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firLeft = firLeft > 100 ? 100: firLeft;
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secLeft = secLeft > 100 ? 100: secLeft;
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var minLeft = Math.min(firLeft, secLeft)
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,wrapWidth = Math.abs(firLeft - secLeft);
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if(options.type === 'vertical'){
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sliderAct.find('.' + SLIDER_BAR).css({"height":wrapWidth + '%', "bottom":minLeft + '%'});
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}else{
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sliderAct.find('.' + SLIDER_BAR).css({"width":wrapWidth + '%', "left":minLeft + '%'});
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};
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var selfValue = options.min + Math.round((options.max - options.min) * offsetValue / 100);
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inputValue = selfValue;
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sliderTxt.children('.' + SLIDER_INPUT_TXT).children('input').val(inputValue);
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sliderWrap.eq(index).data('value', selfValue);
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sliderAct.find('.' + SLIDER_TIPS).html(options.setTips ? options.setTips(selfValue) : selfValue);
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//如果开启范围选择，则返回数组值
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if(options.range){
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var arrValue = [
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sliderWrap.eq(0).data('value')
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,sliderWrap.eq(1).data('value')
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];
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if(arrValue[0] > arrValue[1]) arrValue.reverse(); //如果前面的圆点超过了后面的圆点值，则调换顺序
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}
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that.value = options.range ? arrValue : selfValue; // 最新值
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options.change && options.change(that.value); // change 回调
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// 值完成选中的事件
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if(from === 'done') options.done && options.done(that.value);
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}
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,valueTo = function(value){
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var oldLeft = value / sliderWidth() * 100 / step
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,left = Math.round(oldLeft) * step;
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if(value == sliderWidth()){
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left = Math.ceil(oldLeft) * step;
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};
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return left;
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}
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//拖拽元素
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,elemMove = $(['<div class="layui-auxiliar-moving" id="LAY-slider-moving"></div'].join(''))
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,createMoveElem = function(move, up){
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var upCall = function(){
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up && up();
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elemMove.remove();
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options.done && options.done(that.value);
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};
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$('#LAY-slider-moving')[0] || $('body').append(elemMove);
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elemMove.on('mousemove', move);
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elemMove.on('mouseup', upCall).on('mouseleave', upCall);
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};
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//动态赋值
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if(setValue === 'set') return change(value - options.min, i, 'done');
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//滑块滑动
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sliderAct.find('.' + SLIDER_WRAP_BTN).each(function(index){
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var othis = $(this);
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othis.on('mousedown', function(e){
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e = e || window.event;
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var oldleft = othis.parent()[0].offsetLeft
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,oldx = e.clientX;
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if(options.type === 'vertical'){
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oldleft = sliderWidth() - othis.parent()[0].offsetTop - sliderWrap.height()
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oldx = e.clientY;
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};
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var move = function(e){
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e = e || window.event;
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var left = oldleft + (options.type === 'vertical' ? (oldx - e.clientY) : (e.clientX - oldx));
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if(left < 0)left = 0;
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if(left > sliderWidth())left = sliderWidth();
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var reaLeft = left / sliderWidth() * 100 / step;
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change(reaLeft, index);
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othis.addClass(ELEM_HOVER);
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sliderAct.find('.' + SLIDER_TIPS).show();
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e.preventDefault();
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};
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var up = function(){
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othis.removeClass(ELEM_HOVER);
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sliderAct.find('.' + SLIDER_TIPS).hide();
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};
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createMoveElem(move, up)
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});
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});
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// 点击滑块
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sliderAct.on('click', function(e){
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var main = $('.' + SLIDER_WRAP_BTN);
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var othis = $(this);
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if(!main.is(event.target) && main.has(event.target).length === 0 && main.length){
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var index;
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var offset = options.type === 'vertical'
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? (sliderWidth() - e.clientY + othis.offset().top - $(window).scrollTop())
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:(e.clientX - othis.offset().left - $(window).scrollLeft());
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if(offset < 0)offset = 0;
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if(offset > sliderWidth()) offset = sliderWidth();
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var reaLeft = offset / sliderWidth() * 100 / step;
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if(options.range){
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if(options.type === 'vertical'){
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index = Math.abs(offset - parseInt($(sliderWrap[0]).css('bottom'))) > Math.abs(offset - parseInt($(sliderWrap[1]).css('bottom'))) ? 1 : 0;
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} else {
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index = Math.abs(offset - sliderWrap[0].offsetLeft) > Math.abs(offset - sliderWrap[1].offsetLeft) ? 1 : 0;
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}
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} else {
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index = 0;
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};
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change(reaLeft, index, 'done');
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e.preventDefault();
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}
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});
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//点击加减输入框
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sliderTxt.children('.' + SLIDER_INPUT_BTN).children('i').each(function(index){
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$(this).on('click', function(){
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inputValue = sliderTxt.children('.' + SLIDER_INPUT_TXT).children('input').val();
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if(index == 1){ //减
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inputValue = inputValue - options.step < options.min
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? options.min
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: Number(inputValue) - options.step;
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}else{
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inputValue = Number(inputValue) + options.step > options.max
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? options.max
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: Number(inputValue) + options.step;
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};
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var inputScale = (inputValue - options.min) / (options.max - options.min) * 100 / step;
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change(inputScale, 0, 'done');
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});
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});
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//获取输入框值
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var getInputValue = function(){
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var realValue = this.value;
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realValue = isNaN(realValue) ? 0 : realValue;
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realValue = realValue < options.min ? options.min : realValue;
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realValue = realValue > options.max ? options.max : realValue;
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this.value = realValue;
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var inputScale = (realValue - options.min) / (options.max - options.min) * 100 / step;
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change(inputScale, 0, 'done');
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};
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sliderTxt.children('.' + SLIDER_INPUT_TXT).children('input').on('keydown', function(e){
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if(e.keyCode === 13){
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e.preventDefault();
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getInputValue.call(this);
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}
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}).on('change', getInputValue);
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};
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//事件处理
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Class.prototype.events = function(){
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var that = this
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,options = that.config;
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};
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//核心入口
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slider.render = function(options){
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var inst = new Class(options);
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return thisSlider.call(inst);
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};
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exports(MOD_NAME, slider);
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})
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