• 手把手教Extjs-简单GridField示例讲解二


    使用的Extjs版本为4.2,示例是官方的版本,对里面的语法进行一句一句的学习研究。可以方便他人,又可以提升自己的理解。里面存在的问题,后期会一步一步改进。也欢迎各位指出。

    /*
    Extjs具有很庞大的扩展库,
    每个扩展的容量都十分大,
    通过Loader用于对扩展的动态加载,
    实现对扩展组件的即用即取.*/
    //通过enabled:true,开启Extjs的动态加载
    Ext.Loader.setConfig({enabled: true});
    //确定加载地点
    Ext.Loader.setPath('Ext.ux', '../ux');
    //用到哪些组件,然后就预先加载,多余不用加载的组件
    Ext.require([
        'Ext.grid.*',
        'Ext.data.*',
        'Ext.ux.grid.FiltersFeature',
        'Ext.toolbar.Paging',
        'Ext.ux.ajax.JsonSimlet',
        'Ext.ux.ajax.SimManager'
    ]);
    
    //Extjs自定义一个Product产品类
    Ext.define('Product', {
    //extend:表明Extjs中类的继承,表明Product继承自Ext.data.Model类
    /*详细的内容介绍可以参考https://www.cnblogs.com/youring2/archive/2013/08/22/3274135.html*/
        extend: 'Ext.data.Model',
        fields: [{
            name: 'id',
            type: 'int'
        }, {
            name: 'company'
        }, {
            name: 'price',
            type: 'float'
        }, {
            name: 'date',
            type: 'date',
            dateFormat: 'Y-m-d'
        }, {
            name: 'visible',
            type: 'boolean'
        }, {
            name: 'size'
        }]
    });
    
    //类似于js的onready
    Ext.onReady(function(){
    
        Ext.ux.ajax.SimManager.init({
            delay: 300,
            defaultSimlet: null
        }).register({
            'myData': {
                data: [
                    ['small', 'small'],
                    ['medium', 'medium'],
                    ['large', 'large'],
                    ['extra large', 'extra large']
                ],
                stype: 'json'
            }
        });
    
        var optionsStore = Ext.create('Ext.data.Store', {
            fields: ['id', 'text'],
            proxy: {
                type: 'ajax',
                url: 'myData',
                reader: 'array'
            }
        });
    //初始化标签中的Ext:Qtip属性。没怎么看明白,之后再回顾
        Ext.QuickTips.init();
    
        // for this demo configure local and remote urls for demo purposes
        var url = {
            local:  'grid-filter.json',  // static data file
            remote: 'grid-filter.php'
        };
    
        // configure whether filter query is encoded or not (initially)
        var encode = false;
        
        // configure whether filtering is performed locally or remotely (initially)
        var local = true;
    
    //创建一个数据仓库
        var store = Ext.create('Ext.data.JsonStore', {
            // store configs
            autoDestroy: true,
            model: 'Product',
    //proxy告诉我们从哪里获取数据
            proxy: {
                type: 'ajax',
                url: (local ? url.local : url.remote),
    //reader告诉我们如何解析这个数据
                reader: {
                    type: 'json',
                    root: 'data',
                    idProperty: 'id',
                    totalProperty: 'total'
                }
            },
            remoteSort: false,
            sorters: [{
                property: 'company',
                direction: 'ASC'
            }],
            pageSize: 50
        });
    
        var filters = {
            ftype: 'filters',
            encode: encode, // json encode the filter query
            local: local,   // defaults to false (remote filtering)
    
            // added here.
            filters: [{
                type: 'boolean',
                dataIndex: 'visible'
            }]
        };
    
    
        var createColumns = function (finish, start) {
    
    //创建表格中的列的属性
    //这里是创建两个列,id,company,price,size
            var columns = [{
                dataIndex: 'id',
                text: 'Id',
                // instead of specifying filter config just specify filterable=true
                // to use store's field's type property (if type property not
                // explicitly specified in store config it will be 'auto' which
                // GridFilters will assume to be 'StringFilter'
                filterable: true,
                 30
                //,filter: {type: 'numeric'}
            }, {
                dataIndex: 'company',
                text: 'Company',
                id: 'company',
                flex: 1,
                filter: {
                    type: 'string'
                    // specify disabled to disable the filter menu
                    //, disabled: true
                }
            }, {
                dataIndex: 'price',
                text: 'Price',
                filter: {
                    //type: 'numeric'  // specify type here or in store fields config
                },
                 70
            }, {
                dataIndex: 'size',
                text: 'Size',
                filter: {
                    type: 'list',
                    store: optionsStore
                    //,phpMode: true
                }
            }, {
                dataIndex: 'date',
                text: 'Date',
                filter: true,
                renderer: Ext.util.Format.dateRenderer('m/d/Y')
            }, {
                dataIndex: 'visible',
                text: 'Visible'
                // this column's filter is defined in the filters feature config
            }];
    
            return columns.slice(start || 0, finish);
        };
    
    //创建grid图标
        var grid = Ext.create('Ext.grid.Panel', {
            border: false,
            store: store,
    //创建表格中的列,里面创建四列
            columns: createColumns(4),
            loadMask: true,
            features: [filters],
            dockedItems: [Ext.create('Ext.toolbar.Paging', {
                dock: 'bottom',
                store: store
            })],
    //设置在没有记录的时候表格图标里面该显示什么
            emptyText: 'No Matching Records'
        });
    
        // add some buttons to bottom toolbar just for demonstration purposes
        grid.child('pagingtoolbar').add([
            '->',
            {
                text: 'Encode: ' + (encode ? 'On' : 'Off'),
                tooltip: 'Toggle Filter encoding on/off',
                enableToggle: true,
                handler: function (button, state) {
                    var encode = (grid.filters.encode !== true);
                    var text = 'Encode: ' + (encode ? 'On' : 'Off'); 
                    grid.filters.encode = encode;
                    grid.filters.reload();
                    button.setText(text);
                } 
            },
            {
                text: 'Local Filtering: ' + (local ? 'On' : 'Off'),
                tooltip: 'Toggle Filtering between remote/local',
                enableToggle: true,
                handler: function (button, state) {
                    var local = (grid.filters.local !== true),
                        text = 'Local Filtering: ' + (local ? 'On' : 'Off'),
                        newUrl = local ? url.local : url.remote,
                        store = grid.view.getStore();
                     
                    // update the GridFilter setting
                    grid.filters.local = local;
                    // bind the store again so GridFilters is listening to appropriate store event
                    grid.filters.bindStore(store);
                    // update the url for the proxy
                    store.proxy.url = newUrl;
                    button.setText(text);
                    store.load();
                } 
            },
            {
                text: 'All Filter Data',
                tooltip: 'Get Filter Data for Grid',
                handler: function () {
                    var data = Ext.encode(grid.filters.getFilterData());
                    Ext.Msg.alert('All Filter Data',data);
                } 
            },{
                text: 'Clear Filter Data',
                handler: function () {
                    grid.filters.clearFilters();
                } 
            },{
                text: 'Add Columns',
                handler: function () {
                    if (grid.headerCt.items.length < 6) {
                        grid.headerCt.add(createColumns(6, 4));
                        grid.view.refresh();
                        this.disable();
                    }
                }
            }    
        ]);
    //创建一个面板,用来存放grid,
        var win = Ext.create('Ext.Window', {
            title: 'Grid Filters Example',
            height: 400,
             875,
            layout: 'fit',
            items: grid
        }).show();
    
        store.load();
    });
    
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  • 原文地址:https://www.cnblogs.com/LY-CS/p/12712682.html
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