dojo小例子（3）DataGrid对静态数据的增删

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<!DOCTYPE html><html ><head><link rel="stylesheet" href="../dojo-release-1.9.1/dijit/themes/claro/claro.css"><style type="text/css">@import '../dojo-release-1.9.1/dojox/grid/resources/claroGrid.css';/*Grid needs an explicit height by default*/#gridDiv {    height: 15em;}</style><script src='../dojo-release-1.9.1/dojo/dojo.js'></script><script> require(['dojo/_base/array', 'dojo/_base/lang', 'dojo/_base/event', 'dojo/on', 'dojox/grid/DataGrid', 'dojo/data/ItemFileWriteStore', 'dijit/form/Button', 'dojo/dom', 'dojo/parser', 'dojo/domReady!'],  function(array, lang, event, on, DataGrid, ItemFileWriteStore, Button, dom, parser){    parser.parse();    /*set up data store*/    var data = {              identifier: "id",      items: []    };    var data_list = [      { col1: "normal", col2: false, col3: 'But are not followed by two hexadecimal', col4: 29.91},      { col1: "important", col2: false, col3: 'Because a % sign always indicates', col4: 9.33},      { col1: "important", col2: false, col3: 'Signs can be selectively', col4: 19.34}    ];    var rows = 5;    for(i = 0, l = data_list.length; i < rows; i++){      data.items.push(lang.mixin({ id: i+1 }, data_list[i%l]));    }    store = new ItemFileWriteStore({data: data});    /*set up layout*/    var layout = [[      {'name': 'Column 1', 'field': 'id', 'width': '100px'},      {'name': 'Column 2', 'field': 'col2', 'width': '100px'},      {'name': 'Column 3', 'field': 'col3', 'width': '200px'},              {'name': 'Column 4', 'field': 'col4', 'width': '150px'}    ]];    /*create a new grid*/    grid = new DataGrid({        id: 'grid',        store: store,        structure: layout,        rowSelector: '20px'});    /*append the new grid to the div*/    grid.placeAt("gridDiv");    /* attach an event handler */    on(button2,'click',    function(e){        /* set the properties for the new item: */        var myNewItem = {id: (++i), col1: "Mediate", col2: true, col3: 'Newly added values', col4: 8888};        /* Insert the new item into the store:*/        store.newItem(myNewItem);    }    );    /* attach an event handler */    on(button1,'click',    function(e){        /* Get all selected items from the Grid: */        var items = grid.selection.getSelected();        if(items.length){            /* Iterate through the list of selected items.               The current item is available in the variable               "selectedItem" within the following function: */            array.forEach(items, function(selectedItem){                if(selectedItem !== null){                    /* Delete the item from the data store: */                    store.deleteItem(selectedItem);                } /* end if */            }); /* end forEach */        } /* end if */        event.stop(e);    }    );    /*Call startup() to render the grid*/    grid.startup();}); require(['dojo/parser', 'dojo/domReady!'],  function(parser){    parser.parse(); }); </script></head><body class="claro">    <p>    This example shows, how to add/remove rows</p><div id='gridDiv'></div><p>  <button data-dojo-id='button2' id='button2'>      Add Row  </button>  <button data-dojo-id='button1' id='button1'>      Remove Selected Rows  </button></p></body></html>
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