231 lines
7.5 KiB
JavaScript
231 lines
7.5 KiB
JavaScript
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/** jQuery Calculation Plug-in**/
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(function($) {
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var defaults = {reNumbers: /(-|-\$)?(\d+(,\d{3})*(\.\d{1,})?|\.\d{1,})/g, cleanseNumber: function (v) {
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return v.replace(/[^0-9.\-]/g, "");
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}, useFieldPlugin: (!!$.fn.getValue), onParseError: null, onParseClear: null};
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$.Calculation = {version: "0.4.07",setDefaults: function(options) {
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$.extend(defaults, options);
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}};
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$.fn.parseNumber = function(options) {
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var aValues = [];
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options = $.extend(options, defaults);
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this.each(function () {
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var $el = $(this),sMethod = ($el.is(":input") ? (defaults.useFieldPlugin ? "getValue" : "val") : "text"),v = $.trim($el[sMethod]()).match(defaults.reNumbers, "");
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if (v == null) {
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v = 0;
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if (jQuery.isFunction(options.onParseError)) options.onParseError.apply($el, [sMethod]);
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$.data($el[0], "calcParseError", true);
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} else {
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v = options.cleanseNumber.apply(this, [v[0]]);
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if ($.data($el[0], "calcParseError") && jQuery.isFunction(options.onParseClear)) {
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options.onParseClear.apply($el, [sMethod]);
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$.data($el[0], "calcParseError", false);
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}
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}
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aValues.push(parseFloat(v, 10));
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});
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return aValues;
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};
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$.fn.calc = function(expr, vars, cbFormat, cbDone) {
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var $this = this, exprValue = "", precision = 0, $el, parsedVars = {}, tmp, sMethod, _, bIsError = false;
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for (var k in vars) {
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expr = expr.replace((new RegExp("(" + k + ")", "g")), "_.$1");
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if (!!vars[k] && !!vars[k].jquery) {
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parsedVars[k] = vars[k].parseNumber();
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} else {
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parsedVars[k] = vars[k];
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}
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}
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this.each(function (i, el) {
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var p, len;
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$el = $(this);
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sMethod = ($el.is(":input") ? (defaults.useFieldPlugin ? "setValue" : "val") : "text");
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_ = {};
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for (var k in parsedVars) {
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if (typeof parsedVars[k] == "number") {
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_[k] = parsedVars[k];
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} else if (typeof parsedVars[k] == "string") {
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_[k] = parseFloat(parsedVars[k], 10);
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} else if (!!parsedVars[k] && (parsedVars[k] instanceof Array)) {
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tmp = (parsedVars[k].length == $this.length) ? i : 0;
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_[k] = parsedVars[k][tmp];
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}
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if (isNaN(_[k])) _[k] = 0;
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p = _[k].toString().match(/\.\d+$/gi);
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len = (p) ? p[0].length - 1 : 0;
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if (len > precision) precision = len;
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}
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try {
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exprValue = eval(expr);
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if (precision) exprValue = Number(exprValue.toFixed(Math.max(precision, 4)));
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if (jQuery.isFunction(cbFormat)) {
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var tmp = cbFormat.apply(this, [exprValue]);
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if (!!tmp) exprValue = tmp;
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}
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} catch(e) {
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exprValue = e;
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bIsError = true;
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}
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$el[sMethod](exprValue.toString());
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});
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if (jQuery.isFunction(cbDone)) cbDone.apply(this, [this]);
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return this;
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};
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$.each(["sum", "avg", "min", "max"], function (i, method) {
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$.fn[method] = function (bind, selector) {
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if (arguments.length == 0)return math[method](this.parseNumber());
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var bSelOpt = selector && (selector.constructor == Object) && !(selector instanceof jQuery);
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var opt = bind && bind.constructor == Object ? bind : {bind: bind || "keyup", selector: (!bSelOpt) ? selector : null, oncalc: null};
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if (bSelOpt) opt = jQuery.extend(opt, selector);
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if (!!opt.selector) opt.selector = $(opt.selector);
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var self = this, sMethod, doCalc = function () {
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var value = math[method](self.parseNumber(opt));
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if (!!opt.selector) {
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sMethod = (opt.selector.is(":input") ? (defaults.useFieldPlugin ? "setValue" : "val") : "text");
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opt.selector[sMethod](value.toString());
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}
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if (jQuery.isFunction(opt.oncalc)) opt.oncalc.apply(self, [value, opt]);
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};
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doCalc();
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return self.bind(opt.bind, doCalc);
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}
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});
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var math = {sum: function (a) {
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var total = 0, precision = 0;
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$.each(a, function (i, v) {
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var p = v.toString().match(/\.\d+$/gi), len = (p) ? p[0].length - 1 : 0;
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if (len > precision) precision = len;
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total += v;
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});
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if (precision) total = Number(total.toFixed(precision));
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return total;
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},avg: function (a) {
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return math.sum(a) / a.length;
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},min: function (a) {
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return Math.min.apply(Math, a);
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},max: function (a) {
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return Math.max.apply(Math, a);
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}};
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})(jQuery);
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/** ------------- choose -------------------- **/
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/* reduce_add */
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var setAmount = {
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min:1,
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max:999,
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reg:function(x) {
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return new RegExp("^[1-9]\\d*$").test(x);
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},
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amount:function(obj, mode) {
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var x = $(obj).val();
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if (this.reg(x)) {
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if (mode) {
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x++;
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} else {
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x--;
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}
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} else {
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alert("请输入正确的数量！");
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$(obj).val(1);
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$(obj).focus();
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}
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return x;
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},
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reduce:function(obj) {
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var x = this.amount(obj, false);
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if (x >= this.min) {
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$(obj).val(x);
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recalc();
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} else {
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alert("商品数量最少为" + this.min);
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$(obj).val(1);
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$(obj).focus();
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}
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},
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add:function(obj) {
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var x = this.amount(obj, true);
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if (x <= this.max) {
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$(obj).val(x);
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recalc();
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} else {
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alert("商品数量最多为" + this.max);
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$(obj).val(999);
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$(obj).focus();
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}
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},
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modify:function(obj) {
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var x = $(obj).val();
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if (x < this.min || x > this.max || !this.reg(x)) {
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alert("请输入正确的数量！");
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$(obj).val(1);
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$(obj).focus();
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}
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}
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}
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function BuyUrl(wid) {
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var pcounts = $("input[id^=qty_item_]").val();
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var patrn = /^[0-9]{1,4}$/;
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if (!patrn.exec(pcounts)) {
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pcounts = 1;
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}
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else {
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if (pcounts <= 0)
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pcounts = 1;
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if (pcounts >= 1000)
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pcounts = 999;
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}
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}
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;
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/** total_item **/
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$(document).ready(function () {
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$("input[name^=qty_item_]").bind("keyup", recalc);
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recalc();
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});
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function recalc() {
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$("input[id^=total_item]").val()
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//产品价格统计
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$("[id^=total_item]").calc(
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"qty * price",
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{
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qty: $("input[name^=qty_item_]"),
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price: $("[id^=price_item_]")
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},
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function (s) {
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return "￥" + s.toFixed(2);
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},
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function ($this) {
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var sum = $this.sum();
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$("[id^=total_item]").text(
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"￥" + sum.toFixed(2)
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);
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$("#total_price").val($("[id^=total_item]").text());
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}
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);
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//产品积分统计
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$("[id^=total_points]").calc(
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"qty * price",
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{
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qty: $("input[name^=qty_item_]"),
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price: $("[id^=price_item_]")
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},
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function (s) {
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return "" + s.toFixed(0);
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}
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);
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};
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