• 搜索框组件


    搜索框组件1

    当数据量很大时,keyup时不断地向服务器请求新的的数据,不断渲染搜搜结果。

    代码实现:

    function onKeyUpcbfn_table(input){
            var _input = input.value;
            if (searchCount === 0) {
                searchCount = 1;
                WT.Tool.ajax({apiName:'/symbol/get_symbol_name',param:{search:_input},cbFn:{
                    onSuccess:function(d){
                        searchCount = 0;
                        var symbol=d.data;
                        if (symbol.length<=0) {
                            return;
                        }
                        symbol = symbol.map(function(items,i){
                            return {idx:items.id,txt:items.name,val:items.name}
                        })
                        search.render(symbol);
                        search.input.focus();
                    },
                    onError:function(){
                        searchCount = 0;
                    }
                }});
            }
        }
    View Code

    搜索框2

    当数据量不是很多时可以只请求1次,然后处理拿到的数据。

    实现步骤先获取数据-》加载默认数据-》实现搜索功能-》实现选中结果字体变蓝-》添加选中事件-》添加键盘按up,down键向上向下选中元素-》点击任意位置让new出的DOM元素消失。

    代码实现

    function symbolGet_table(cbFn1){//商品及其属性加在
            WT.Tool.ajax({apiName:'/symbol/get_symbol_name',param:{},cbFn:{
                    onSuccess:function(d){
                        var symbol=d.data;//pid:名称对应 商品33,现货市场34,外汇市场35,股指期货36
                        if (!WT.G.P.symbolList[0]) {
                            WT.G.P.symbolList = [[],[],[],[],[]];
                            symbol.map(function(item){
                                WT.G.P.symbolList[0].push(item);
                                switch(parseInt(item.pid)){
                                    case 33:
                                        WT.G.P.symbolList[1].push(item);
                                    break;
                                    case 34:
                                        WT.G.P.symbolList[2].push(item);
                                    break;
                                    case 35:
                                        WT.G.P.symbolList[3].push(item);
                                    break;
                                    case 36:
                                        WT.G.P.symbolList[4].push(item);
                                    break;
                                    default:
                                        console.log('去问小冯冯Pid有没有改变');
                                    break;
                                }
                                return;
                            });
                        }
                        
                        // console.log(WT.G.P.symbolList);
                        cbFn1(symbol);
                    }
                }});
           }
    View Code
        function searchSymbolFn(x,y,cbFn){//商品名搜索
            if (WT.G.P.symbolList[0].length > 0) {
                selectedList = null;
                searchSel = [];
                var oSearch = $DB.adElm('','div').cn('pa ml10 mt10 List_bs_sign').css('z-index:51').h(laytpl(search_content_tlp.help()).render({}));
                oSearch.evt('mousedown',function(){
                    var e=WT.e.fix(e);
                    e.stop();
                });
                oSearch.evt('mouseenter',function(){
                    oSearchInput.focus();
                });
                oSearch.css(WT.box([x,y,260,300].join(',')));
                var oSearchList = $(oSearch.querySelector('[opt=symbol_list]'));
                var oSearchInput = $(oSearch.querySelector('[opt=search_input]'));
                oSearchInput.focus();
                var oSearchUl = $(oSearch.querySelector('[opt=search_ul]'));
                searchRenderFn(WT.G.P.symbolList[0],oSearchList,true);//加载查询结果
                var selected = $(oSearchUl.querySelector('li:first-child'));                
                oSearchUl.evt('mousedown',function(){//点击分类按钮
                    var e = WT.e.fix(e),_e = e.t;
                    var sInput = oSearchInput.val().toLow().trim();
                    while(_e.tagName !== 'UL'){
                        if(_e.tagName === 'LI'){
                            _e.cn('bc_51 c_0 tac r2 pt3l8 mt-5');
                            switch(+_e.attr('opt')){
                                case 0:
                                    searchRenderFn(WT.G.P.symbolList[0],oSearchList,true);
                                    searchRenderValFn(searchSel,oSearchList,sInput);
                                break;
                                case 1:
                                    searchRenderFn(WT.G.P.symbolList[1],oSearchList);
                                    searchRenderValFn(searchSel,oSearchList,sInput);
                                break;
                                case 2:
                                    searchRenderFn(WT.G.P.symbolList[2],oSearchList);
                                    searchRenderValFn(searchSel,oSearchList,sInput);
                                break; 
                                case 3:
                                    searchRenderFn(WT.G.P.symbolList[3],oSearchList);
                                    searchRenderValFn(searchSel,oSearchList,sInput);
                                break;
                                case 4:
                                    searchRenderFn(WT.G.P.symbolList[4],oSearchList);
                                    searchRenderValFn(searchSel,oSearchList,sInput);
                                break;
                                default:
                                break;
                            }
                            if(selected){
                                 if(selected == _e){
                                      return;
                                  }else{
                                    selected.cn('c_26 pt3l8 mt-5');
                                  }
                            }
                            selected = _e;
                        }
                        _e = _e.pn();
                    }
                });   
                oSearchInput.evt('keyup',function(){//搜索框keyup
                    var e=WT.e.fix(e),_e=e.t;
                    var sInput = oSearchInput.val().toLow().trim();
                    if (e.kCode === 38) {
                        if (selectedList) {
                            if (selectedList.previousElementSibling) {
                                selectedList.dc('bc_11');
                                selectedList = $(selectedList.previousElementSibling);
                                selectedList.ac('bc_11');
                                selectedList.scrollIntoViewIfNeeded();
                            }
                        }
                    }else if (e.kCode === 40) {
                        if (selectedList) {
                            if (selectedList.nextElementSibling) {
                                selectedList.dc('bc_11');
                                selectedList = $(selectedList.nextElementSibling);
                                selectedList.ac('bc_11');
                                selectedList.scrollIntoViewIfNeeded();
                            }
                        }
                    }else if (e.kCode == 13) {
                        if (selectedList) {
                           var o = {
                                val:selectedList.chr(0).h().replace(/<.+?>/g, ''),
                                txt:selectedList.chr(1).h().replace(/<.+?>/g, '')
                            };
                            if(cbFn){
                                cbFn();
                            }else{
                                WT.G._argsSearchBinding(o);
                            }
                            oSearch.r(); 
                        }
                    }else{
                        searchRenderValFn(searchSel,oSearchList,sInput);
                    }
                });
                 
                oSearchList.evt('mousedown',function(){//点击搜索列表
                   var e = WT.e.fix(e),_e = e.t;
                    while(_e.tagName !== 'TABLE'){
                        if(_e.tagName === 'TR'){
                            _e.ac('bc_12');
                            var o = {
                                val:_e.chr(0).h().replace(/<.+?>/g, ''),
                                txt:_e.chr(1).h().replace(/<.+?>/g, '')
                            };
                            if(cbFn){
                                cbFn();
                            }else{
                                WT.G._argsSearchBinding(o);
                            }
                            oSearch.r();
                            if(selectedList){
                                 if(selectedList == _e){
                                      return;
                                  }else{
                                    selectedList.dc('bc_12');
                                  }
                            }
                            selectedList = _e;
                        }
                        _e = _e.pn();
                    } 
                });
            }
        }
    View Code
    function searchRenderFn(items,oSearchList,isBengin){//重新渲染search结果
            searchSel = items.map(function(item){
                return {
                    name:item.name,
                    name_en:item.description
                };
            });
            if (isBengin) {
                oSearchList.h(laytpl(search_list_tlp.help()).render(searchSel));
                selectedList = $(oSearchList.querySelector('tr:first-child'));
                selectedList.ac('bc_11');
            }        
        }
    View Code
    function searchRenderValFn(searchSel,oSearchList,sInput){
            searchSel.forEach(function(item){
                item.name = item.name.replace(/<.+?>/g, '');
                item.name_en = item.name_en.replace(/<.+?>/g, '');
            });
    
            var _current = searchSel.filter(function(o){
                return o.name.toLow().indexOf(sInput)>-1 || o.name_en.indexOf(sInput)>-1;
            });
    
            _current.forEach(function(item){
                item.name = item.name.replace(new RegExp(sInput, 'ig'), function(word){return '<font color="#15a7fa">' + word + '</font>'});
                item.name_en = item.name_en.replace(new RegExp(sInput, 'ig'), function(word){return '<font color="#15a7fa">' + word + '</font>'});
            });
    
            oSearchList.h(laytpl(search_list_tlp.help()).render(_current));
            selectedList = $(oSearchList.querySelector('tr:first-child'));
            selectedList.ac('bc_11');
        }
    View Code

    q1:如果搜索列表中选中的文字和输入的文字相等,使选中文字变蓝。

    在元素一加载时清楚所有标签

    searchSel.forEach(function(item){
    item.name = item.name.replace(/<.+?>/g, '');
    item.name_en = item.name_en.replace(/<.+?>/g, '');
    });

    在元素过滤搜索时添加<font>标签

    var _current = searchSel.filter(function(o){
    return o.name.toLow().indexOf(sInput)>-1 || o.name_en.indexOf(sInput)>-1;
    });

    _current.forEach(function(item){
    item.name = item.name.replace(new RegExp(sInput, 'ig'), function(word){return '<font color="#15a7fa">' + word + '</font>'});
    item.name_en = item.name_en.replace(new RegExp(sInput, 'ig'), function(word){return '<font color="#15a7fa">' + word + '</font>'});
    });

    最后渲染查询结果,并让表格的第一列为选中元素,为keyup上下选择元素做打算。

    oSearchList.h(laytpl(search_list_tlp.help()).render(_current));
    selectedList = $(oSearchList.querySelector('tr:first-child'));
    selectedList.ac('bc_11');

    q2 上下键盘事件技巧,利用上一个或者下一个元素的兄的节点是否存在控制当前选中的元素,注意事件绑定在于是内部很容易重复绑定,使用完记得将事件remove掉。

    if (e.kCode === 38) {
    if (selectedList) {
    if (selectedList.previousElementSibling) {
    oSearchInput.blur();
    selectedList.dc('bc_11');
    selectedList = $(selectedList.previousElementSibling);
    selectedList.ac('bc_11');
    selectedList.scrollIntoViewIfNeeded();
    }
    }
    }
    if (e.kCode === 40) {
    if (selectedList) {
    if (selectedList.nextElementSibling) {
    oSearchInput.blur();
    selectedList.dc('bc_11');
    selectedList = $(selectedList.nextElementSibling);
    selectedList.ac('bc_11');
    selectedList.scrollIntoViewIfNeeded();
    }
    }
    }

    q3 当前选中元素不再视野中时使用scrollIntoViewIfNeeded()

    selectedList.scrollIntoViewIfNeeded();

    q4 触发键盘上下键时要使输入框失去焦点,不然没法按上下键只能选中前两个元素

    q5 (这个问题没解决)用户搜索时输入中文然后按回车变成英文,此刻自己写的keyup事件没有触发。

    search问题补充:
    1 对于keyup,keydown之类的事件要要使要绑定的元素处于focus状态,不然不会触发;事件绑定在input的keyup事件,在样式上控制页面当前选中的元素。
    2 产生错误要一步步排查,要认真看代码是否有逻辑错误
    3 小技巧当元素执行mouseenter事件时就是元素获取鼠标焦点

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  • 原文地址:https://www.cnblogs.com/lv-sally/p/5631102.html
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