Ext.onReady(function(){
//要使用ExtJS提供的冒泡提示，必须加上下面这句
Ext.QuickTips.init();
Ext.override(Ext.grid.ColumnModel,{
//根据列定义时的给出的ID，得到该列的渲染方法，其实是为了更新单个单元格时，显示与定义一致
getRendererById:function(id){
return this.getRenderer(this.getIndexById(id));
}
});
//步骤4：
Ext.data.Record.REPLACE = 'repalce';//定义一个记录的替换命令，目前没有什么作用
Ext.override(Ext.data.Record,{
//替换单个字段的值的方法
replace : function(name, value){
var encode = Ext.isPrimitive(value) ? String : Ext.encode;
if(encode(this.data[name]) == encode(value)) {
return;
}
this.dirty = true;
if(!this.modified){
this.modified = {};
}
if(this.modified[name] === undefined){
this.modified[name] = this.data[name];
}
this.data[name] = value;//模型更新
this.afterReplace(name,value);//通过Store通知gridview视图更新
},
//通过Store通知gridview视图更新方法
afterReplace:function(name,value){
if (this.store != undefined && typeof this.store.afterReplace == "function") {
this.store.afterReplace(this,name,value);
}
}
});
//步骤5：
Ext.override(Ext.data.Store,{
//新定义的通知gridview视图更新的方法
afterReplace : function(record,name,value){
if(this.modified.indexOf(record) == -1){
this.modified.push(record);
}
//通知视图更新
this.fireEvent('repalce',record,name,value, Ext.data.Record.REPLACE);
}
}
);
var myData = [
['3m Co',71.72,0.02,0.03,'9/1 12:00am'],
['Alcoa Inc',29.01,0.42,1.47,'9/1 12:00am'],
['Altria Group Inc',83.81,0.28,0.34,'9/1 12:00am']
];
// example of custom renderer function
function change(val){
if(val > 0){
return '<span qtip="'+val+'" style="color:green;">' + val + '</span>';
}else if(val < 0){
return '<span qtip="'+val+'" style="color:red;">' + val + '</span>';
}
return val;
}
//使用ExtJS提供的冒泡提示
function titleQtip(val){
return '<span qtip="'+val+'">' + val + '</span>';
}
// example of custom renderer function
function pctChange(val){
if(val > 0){
return '<span style="color:green;">' + val + '%</span>';
}else if(val < 0){
return '<span style="color:red;">' + val + '%</span>';
}
return val;
}
// create the data store
var store = new Ext.data.Store({
proxy: new Ext.ux.data.PagingMemoryProxy(myData),
remoteSort:true,
sortInfo: {field:'price', direction:'ASC'},
reader: new Ext.data.ArrayReader({
fields: [
{name: 'company'},
{name: 'price', type: 'float'},
{name: 'change', type: 'float'},
{name: 'pctChange', type: 'float'},
{name: 'lastChange', type: 'date', dateFormat: 'n/j h:ia'}
]
})
});
Ext.override(Ext.grid.GridView,{
////步骤7：真正实现GridView更新单个单元格的方法
onReplace:function(record,name,value){
var ds = this.ds, index;
if(Ext.isNumber(record)){
index = record;
record = ds.getAt(index);
if(!record){
return;
}
}else{
index = ds.indexOf(record);
if(index < 0){
return;
}
}
//实现单个字段的更新
document.getElementById(index+name).innerHTML = this.cm.getRendererById(name).call(this,value);
},
//步骤6：
initData : function(ds, cm){
if(this.ds){
this.ds.un('load', this.onLoad, this);
this.ds.un('datachanged', this.onDataChange, this);
this.ds.un('add', this.onAdd, this);
this.ds.un('remove', this.onRemove, this);
this.ds.un('update', this.onUpdate, this);
this.ds.un('clear', this.onClear, this);
//表格销毁时把这个监听放弃
this.ds.un('repalce', this.onReplace, this);
if(this.ds !== ds && this.ds.autoDestroy){
this.ds.destroy();
}
}
if(ds){
ds.on({
scope: this,
load: this.onLoad,
datachanged: this.onDataChange,
add: this.onAdd,
remove: this.onRemove,
update: this.onUpdate,
clear: this.onClear,
//当表格加载Store时，把这个监听添加上
repalce: this.onReplace
});
}
this.ds = ds;
if(this.cm){
this.cm.un('configchange', this.onColConfigChange, this);
this.cm.un('widthchange', this.onColWidthChange, this);
this.cm.un('headerchange', this.onHeaderChange, this);
this.cm.un('hiddenchange', this.onHiddenChange, this);
this.cm.un('columnmoved', this.onColumnMove, this);
}
if(cm){
delete this.lastViewWidth;
cm.on({
scope: this,
configchange: this.onColConfigChange,
widthchange: this.onColWidthChange,
headerchange: this.onHeaderChange,
hiddenchange: this.onHiddenChange,
columnmoved: this.onColumnMove
});
}
this.cm = cm;
},
doRender : function(columns, records, store, startRow, colCount, stripe) {
var templates = this.templates,
cellTemplate = templates.cell,
rowTemplate = templates.row,
last = colCount - 1;
var tstyle = 'width:' + this.getTotalWidth() + ';';
// buffers
var rowBuffer = [],
colBuffer = [],
rowParams = {tstyle: tstyle},
meta = {},
column,
record;
//build up each row's HTML
for (var j = 0, len = records.length; j < len; j++) {
record = records[j];
colBuffer = [];
var rowIndex = j + startRow;
//build up each column's HTML
for (var i = 0; i < colCount; i++) {
column = columns[i];
meta.id = column.id;
meta.css = i === 0 ? 'x-grid3-cell-first ' : (i == last ? 'x-grid3-cell-last ' : '');
meta.attr = meta.cellAttr = '';
meta.style = column.style;
meta.value = column.renderer.call(column.scope, record.data[column.name], meta, record, rowIndex, i, store);
//步骤2：定义这个字段的DIV的ID，这个地方是关键，否则我们通过document.getElementById找不到这个DIV，也就不可以实现这个功能了。
meta.divId = j+column.name;
if (Ext.isEmpty(meta.value)) {
meta.value = ' ';
}
if (this.markDirty && record.dirty && Ext.isDefined(record.modified[column.name])) {
meta.css += ' x-grid3-dirty-cell';
}
colBuffer[colBuffer.length] = cellTemplate.apply(meta);
}
//set up row striping and row dirtiness CSS classes
var alt = [];
if (stripe && ((rowIndex + 1) % 2 === 0)) {
alt[0] = 'x-grid3-row-alt';
}
if (record.dirty) {
alt[1] = ' x-grid3-dirty-row';
}
rowParams.cols = colCount;
if (this.getRowClass) {
alt[2] = this.getRowClass(record, rowIndex, rowParams, store);
}
rowParams.alt = alt.join(' ');
rowParams.cells = colBuffer.join('');
rowBuffer[rowBuffer.length] = rowTemplate.apply(rowParams);
}
return rowBuffer.join('');
}
});
var ts = {};
ts.cell = new Ext.Template('<td class="x-grid3-col x-grid3-cell x-grid3-td-{id} {css}" style="{style}" tabIndex="0" {cellAttr}>',
//步骤1：本来是打开在GridView重写这部分，可是发现代码太多，觉得没有必要，在这里直接定义为Div添加一个id的属性即可。
'<div id=\'{divId}\' class="x-grid3-cell-inner x-grid3-col-{id}" unselectable="on" {attr}>{value}</div>','</td>');
// create the Grid
var grid = new Ext.grid.GridPanel({
store: store,
//步骤3：注意在添加这个属性
viewConfig:{
templates:ts
},
columns: [
{id:'company',header: "Company", width: 160, sortable: true,renderer: titleQtip, dataIndex: 'company'},
{header: "Price", width: 75, sortable: true, renderer: 'usMoney', dataIndex: 'price'},
{id:'change',header: "Change", width: 75, sortable: true, renderer: change, dataIndex: 'change'},
{header: "% Change", width: 75, sortable: true, renderer: pctChange, dataIndex: 'pctChange'},
{header: "Last Updated", width: 85, sortable: true, renderer: Ext.util.Format.dateRenderer('m/d/Y'), dataIndex: 'lastChange'}
],
stripeRows: true,
autoExpandColumn: 'company',
height:320,
width:600,
frame:true,
title:'Sliding Pager',
id:'maingrid',
plugins: new Ext.ux.PanelResizer({
minHeight: 100
}),
bbar: new Ext.PagingToolbar({
pageSize: 10,
store: store,
displayInfo: true
})
});
grid.render('grid-example');
store.load({params:{start:0, limit:10}});
//alert(document.getElementById('1pctChange').innerHTML);
});
//测试该功能的代码
function change(){
//修改第2行的company这个字段的值
Ext.getCmp('maingrid').store.getAt(1).replace('company','ddddd');
}
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