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286 lines
9.6 KiB
286 lines
9.6 KiB
/** |
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* 分页控件 |
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* |
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* Created by GUY on 2015/8/31. |
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* @class BI.DetailPager |
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* @extends BI.Widget |
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*/ |
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BI.DetailPager = BI.inherit(BI.Widget, { |
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_defaultConfig: function () { |
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return BI.extend(BI.DetailPager.superclass._defaultConfig.apply(this, arguments), { |
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baseCls: "bi-detail-pager", |
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behaviors: {}, |
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layouts: [{ |
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type: "bi.horizontal", |
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}], |
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dynamicShow: true, // 是否动态显示上一页、下一页、首页、尾页, 若为false,则指对其设置使能状态 |
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// dynamicShow为false时以下两个有用 |
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dynamicShowFirstLast: false, // 是否动态显示首页、尾页 |
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dynamicShowPrevNext: false, // 是否动态显示上一页、下一页 |
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pages: false, // 总页数 |
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curr: function () { |
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return 1; |
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}, // 初始化当前页 |
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groups: 0, // 连续显示分页数 |
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jump: BI.emptyFn, // 分页的回调函数 |
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first: false, // 是否显示首页 |
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last: false, // 是否显示尾页 |
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prev: "上一页", |
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next: "下一页", |
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firstPage: 1, |
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lastPage: function () { // 在万不得已时才会调用这个函数获取最后一页的页码, 主要作用于setValue方法 |
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return 1; |
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}, |
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hasPrev: BI.emptyFn, // pages不可用时有效 |
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hasNext: BI.emptyFn // pages不可用时有效 |
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}); |
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}, |
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_init: function () { |
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BI.DetailPager.superclass._init.apply(this, arguments); |
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var self = this; |
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this.currPage = BI.result(this.options, "curr"); |
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// 翻页太灵敏 |
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this._lock = false; |
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this._debouce = BI.debounce(function () { |
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self._lock = false; |
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}, 300); |
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this._populate(); |
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}, |
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_populate: function () { |
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var self = this, o = this.options, view = [], dict = {}; |
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this.empty(); |
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var pages = BI.result(o, "pages"); |
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var curr = BI.result(this, "currPage"); |
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var groups = BI.result(o, "groups"); |
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var first = BI.result(o, "first"); |
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var last = BI.result(o, "last"); |
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var prev = BI.result(o, "prev"); |
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var next = BI.result(o, "next"); |
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if (pages === false) { |
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groups = 0; |
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first = false; |
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last = false; |
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} else { |
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groups > pages && (groups = pages); |
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} |
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// 计算当前组 |
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dict.index = Math.ceil((curr + ((groups > 1 && groups !== pages) ? 1 : 0)) / (groups === 0 ? 1 : groups)); |
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// 当前页非首页,则输出上一页 |
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if (((!o.dynamicShow && !o.dynamicShowPrevNext) || curr > 1) && prev !== false) { |
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if (BI.isKey(prev)) { |
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view.push({ |
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text: prev, |
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value: "prev", |
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disabled: pages === false ? o.hasPrev(curr) === false : !(curr > 1 && prev !== false) |
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}); |
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} else { |
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view.push(BI.extend({ |
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disabled: pages === false ? o.hasPrev(curr) === false : !(curr > 1 && prev !== false) |
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}, prev)); |
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} |
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} |
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// 当前组非首组,则输出首页 |
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if (((!o.dynamicShow && !o.dynamicShowFirstLast) || (dict.index > 1 && groups !== 0)) && first) { |
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view.push({ |
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text: first, |
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value: "first", |
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disabled: !(dict.index > 1 && groups !== 0) |
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}); |
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if (dict.index > 1 && groups !== 0) { |
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view.push({ |
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type: "bi.label", |
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cls: "page-ellipsis", |
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text: "\u2026" |
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}); |
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} |
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} |
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// 输出当前页组 |
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dict.poor = Math.floor((groups - 1) / 2); |
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dict.start = dict.index > 1 ? curr - dict.poor : 1; |
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dict.end = dict.index > 1 ? (function () { |
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var max = curr + (groups - dict.poor - 1); |
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return max > pages ? pages : max; |
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}()) : groups; |
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if (dict.end - dict.start < groups - 1) { // 最后一组状态 |
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dict.start = dict.end - groups + 1; |
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} |
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var s = dict.start, e = dict.end; |
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if (first && last && (dict.index > 1 && groups !== 0) && (pages > groups && dict.end < pages && groups !== 0)) { |
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s++; |
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e--; |
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} |
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for (; s <= e; s++) { |
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if (s === curr) { |
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view.push({ |
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text: s, |
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value: s, |
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selected: true |
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}); |
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} else { |
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view.push({ |
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text: s, |
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value: s |
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}); |
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} |
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} |
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// 总页数大于连续分页数,且当前组最大页小于总页,输出尾页 |
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if (((!o.dynamicShow && !o.dynamicShowFirstLast) || (pages > groups && dict.end < pages && groups !== 0)) && last) { |
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if (pages > groups && dict.end < pages && groups !== 0) { |
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view.push({ |
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type: "bi.label", |
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cls: "page-ellipsis", |
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text: "\u2026" |
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}); |
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} |
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view.push({ |
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text: last, |
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value: "last", |
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disabled: !(pages > groups && dict.end < pages && groups !== 0) |
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}); |
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} |
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// 当前页不为尾页时,输出下一页 |
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dict.flow = !prev && groups === 0; |
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if (((!o.dynamicShow && !o.dynamicShowPrevNext) && next) || (curr !== pages && next || dict.flow)) { |
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view.push((function () { |
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if (BI.isKey(next)) { |
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if (pages === false) { |
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return {text: next, value: "next", disabled: o.hasNext(curr) === false}; |
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} |
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return (dict.flow && curr === pages) |
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? |
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{text: next, value: "next", disabled: true} |
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: |
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{text: next, value: "next", disabled: !(curr !== pages && next || dict.flow)}; |
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} |
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return BI.extend({ |
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disabled: pages === false ? o.hasNext(curr) === false : !(curr !== pages && next || dict.flow) |
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}, next); |
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}())); |
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} |
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this.button_group = BI.createWidget({ |
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type: "bi.button_group", |
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element: this, |
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items: BI.createItems(view, { |
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cls: "page-item bi-border bi-list-item-active", |
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height: 23 |
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}), |
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behaviors: o.behaviors, |
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layouts: o.layouts |
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}); |
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this.button_group.on(BI.Controller.EVENT_CHANGE, function (type, value, obj) { |
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if (self._lock === true) { |
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return; |
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} |
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self._lock = true; |
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self._debouce(); |
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if (type === BI.Events.CLICK) { |
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var v = self.button_group.getValue()[0]; |
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switch (v) { |
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case "first": |
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self.currPage = 1; |
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break; |
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case "last": |
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self.currPage = pages; |
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break; |
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case "prev": |
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self.currPage--; |
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break; |
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case "next": |
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self.currPage++; |
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break; |
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default: |
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self.currPage = v; |
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break; |
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} |
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o.jump.apply(self, [{ |
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pages: pages, |
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curr: self.currPage |
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}]); |
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self._populate(); |
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self.fireEvent(BI.DetailPager.EVENT_CHANGE, obj); |
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} |
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self.fireEvent(BI.Controller.EVENT_CHANGE, arguments); |
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}); |
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this.fireEvent(BI.DetailPager.EVENT_AFTER_POPULATE); |
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}, |
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getCurrentPage: function () { |
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return this.currPage; |
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}, |
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setAllPages: function (pages) { |
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this.options.pages = pages; |
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this._populate(); |
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}, |
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hasPrev: function (v) { |
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v || (v = 1); |
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var o = this.options; |
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var pages = this.options.pages; |
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return pages === false ? o.hasPrev(v) : v > 1; |
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}, |
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hasNext: function (v) { |
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v || (v = 1); |
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var o = this.options; |
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var pages = this.options.pages; |
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return pages === false ? o.hasNext(v) : v < pages; |
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}, |
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setValue: function (v) { |
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var o = this.options; |
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v = v || 0; |
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v = v < 1 ? 1 : v; |
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if (o.pages === false) { |
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var lastPage = BI.result(o, "lastPage"), firstPage = 1; |
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this.currPage = v > lastPage ? lastPage : ((firstPage = BI.result(o, "firstPage")), (v < firstPage ? firstPage : v)); |
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} else { |
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v = v > o.pages ? o.pages : v; |
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this.currPage = v; |
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} |
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this._populate(); |
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}, |
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getValue: function () { |
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var val = this.button_group.getValue()[0]; |
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switch (val) { |
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case "prev": |
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return -1; |
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case "next": |
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return 1; |
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case "first": |
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return BI.MIN; |
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case "last": |
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return BI.MAX; |
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default : |
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return val; |
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} |
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}, |
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attr: function (key, value) { |
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BI.DetailPager.superclass.attr.apply(this, arguments); |
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if (key === "curr") { |
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this.currPage = BI.result(this.options, "curr"); |
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} |
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}, |
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populate: function () { |
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this._populate(); |
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} |
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}); |
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BI.DetailPager.EVENT_CHANGE = "EVENT_CHANGE"; |
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BI.DetailPager.EVENT_AFTER_POPULATE = "EVENT_AFTER_POPULATE"; |
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BI.shortcut("bi.detail_pager", BI.DetailPager);
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