扩展GridPanel
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ext的强大是可以看见的，这里我在网上找了一个经过扩展的grid，主要可以实现，分页后保存checkbox的选择状态。代码如下 view plaincopy to clipboardprint?
/**
* 封装的grid
* 功能:分页后仍保持选中状态
* 约定:root为list, totalProperty为total, grid的第一列必须为id
*/
Ext.namespace('Ext.ux.grid');
Ext.ux.grid.MyGrid = Ext.extend(Ext.grid.GridPanel,{
/*
* true to keep the records selected when you paging
* @default(false)
* @type: boolean
*/
keepSelectedOnPaging: false,
/*
* the array to store the record id
* @type: array
*/
recordIds:new Array(),
/*
* set your id Column Name
* @default : this.CM_JR_Record[0].dataIndex
*/
idColName:'',
/*
* set this.store.load url;
* @type: string
*/
url: '',
/*
* show the rowNumber or not
* @type: boolean
* @default: true
*/
rowNumber : true,
/*
* set the grid sm,if checkBoxSelection=true,sm=CheckBoxSelectionModel
* else sm=RowSelectionModel,default to true;
* @type: boolean
*/
checkBox: true,
/*
* set the grid cm array;
* set the JsonReader record;
*
* format: [{name:'',header:'',visiable:'',...another cm options},{}],
* @name=dataIndex
* @visiable: set this record to the cm(grid header) default(true)
* @type: array (records)
*/
CM_JR_Record: null,
/*
* true to add a bottom paging bar
* @defalut: true
* @type: boolean
*/
pagingBar: true,
/*
* config paging bar if pagingBar set true
* @type: object
* @default: {pageSize: 20,store: this.store,displayInfo: true,
* displayMsg: '当前记录数: {0} - {1} 总记录数: {2}',
* emptyMsg: '<b>0</b> 条记录'}
*/
pagingConfig:{
pageSize: 15,
store: this.store,
displayInfo: true,
displayMsg: "显示第 {0} 条到 {1} 条记录，一共 {2} 条",
emptyMsg: '<b>0</b> 条记录',
},
viewConfig:{
forceFit: true
},
//private
initComponent: function(){
if(this.CM_JR_Record){
this.init_SM_CM_DS();
}
if(this.pagingBar){
this.init_PagingBar();
}
if(this.keepSelectedOnPaging){
this.init_OnPaging();
}
Ext.ux.grid.MyGrid.superclass.initComponent.call(this);
},
/*
* init the grid use the config options
* @return: void
* @params: none
*/
init_SM_CM_DS: function(){
var gCm = new Array();
var gRecord = new Array();
if(this.rowNumber){
gCm[gCm.length]=new Ext.grid.RowNumberer();
}
if(this.checkBox){
var sm = new Ext.grid.CheckboxSelectionModel();
gCm[gCm.length] = sm;
this.selModel = sm;
}
for(var i=0;i<this.CM_JR_Record.length;i++)
{
var g = this.CM_JR_Record[i];
if(g.visiable || g.visiable=='undefined' || g.visiable==null){
gCm[gCm.length] = g;
}
gRecord[gRecord.length]={
name: g.dataIndex,
type: g.type || 'string'
}
}
//create grid columnModel
this.cm = new Ext.grid.ColumnModel(gCm);
this.cm.defaultSortable = true;
//create a jsonStore
this.store = new Ext.data.Store({
proxy: new Ext.data.HttpProxy({
url: this.url,
method: 'post'
}),
reader:new Ext.data.JsonReader({
totalProperty: 'total',
root: 'list'
},
Ext.data.Record.create(gRecord)
)
});
this.pagingConfig.store = this.store;
if(this.pagingBar){
this.store.load({params:{start:0,limit:this.pagingConfig.pageSize}});
}else{
this.store.load();
}
},
/*
* 创建并初始化paging bar
*/
init_PagingBar: function(){
var bbar = new Ext.PagingToolbar(this.pagingConfig);
this.bbar = bbar;
},
init_OnPaging: function(){
this.idColName = this.CM_JR_Record[0].dataIndex ;//默认第一列为ID列
this.selModel.on('rowdeselect',function(selMdl,rowIndex,rec ){
for(var i=0;i<this.recordIds.length;i++)
{
if(rec.data[this.idColName] == this.recordIds[i]){
this.recordIds.splice(i,1);
return;
}
}
},this);
this.selModel.on('rowselect',function(selMdl,rowIndex,rec){
if(this.hasElement(this.recordIds)){
for(var i=0;i<this.recordIds.length;i++){
if(rec.data[this.idColName] == this.recordIds[i]){
return;
}
}
}
this.recordIds.unshift(rec.data[this.idColName]);
},this);
this.store.on('load',function(st,recs){
if(this.hasElement(this.recordIds)){
st.each(function(rec){
Ext.each(this.recordIds,function(item,index,allItems){
if(rec.data[this.idColName] == item){
this.selModel.selectRecords([rec],true);
return false;
}
},this);
},this);
}
},this);
},
hasElement : function(recIds){
if(recIds.length > 0)
return true;
else
return false;
}
}
)<SPAN style="FONT-FAMILY: Arial,Verdana,Sans-Serif">
//**************************这是个demo</SPAN>*****************
<SPAN style="FONT-FAMILY: Arial,Verdana,Sans-Serif"></SPAN><SPAN style="FONT-FAMILY: Arial,Verdana,Sans-Serif"><PRE class=jscript name="code">var CM_JR_Record = [
{
dataIndex:"id",
visiable: false//不显示，反之为显示
},{
dataIndex:"accid",
header:"发布人ID",
visiable: true
},{
header: '标题',
width: 80,
dataIndex: 'bt',
visiable: true
}, {
header: '发布时间',
width: 80,
dataIndex: 'fbsj',
visiable: true
}, {
header: '发布人员',
width: 80,
dataIndex: 'fbry',
visiable: true
}, {
header: '审核',
width: 80,
dataIndex: 'sh',
visiable: true
}, {
header: '审核人员',
width: 80,
dataIndex: 'shry',
visiable: true
}, {
header: '审核时间',
width: 80,
dataIndex: 'shsj',
visiable: true
}, {
header: '点击数',
width: 80,
dataIndex: 'snum',
visiable: true
}];
var myGrid = new Ext.ux.grid.MyGrid({
url : '/ecommerce/findAllBulletin.action', // the store load url (required)
CM_JR_Record: CM_JR_Record, //.....(required)
rowNumber:true, //true to add a Ext.grid.RowNumberer,defalut(true)
checkBox:true, //true to add a Ext.grid.CheckBoxSelectionModel,default(true)
pagingBar:true, //true to add a Ext.PagingToolBar,default(true)
// pagingConfig:objcet, //config pagingToolBar if pagingBar is true
keepSelectedOnPaging: true, //true to FireEvent when you paging to keep the state of record selected
recordIds : new Array() , // store seleced ids when keepSelectedOnPaging is true
idColName :'id', //the id column name
width : 700,
height: 600,
renderTo: 'editor-grid',
tbar: [{
id : 'Add',
text : ' 新建 ',
tooltip : '新建一个表单',
iconCls : 'add',
pageSize: 15,
handler : function(){
ptb_bt1();
}
},{
text: '删除所选',
iconCls:'remove',
tooltip : '删除所选数据',
handler : function(){
//myGrid.recordIds是一个数组，里面存放选中的checkboxid
if(myGrid.recordIds.length == 0){
Ext.MessageBox.alert('提示','请选择一条记录！');
}else{
// 弹出对话框警告
Ext.MessageBox.confirm('确认删除',
'你真的要删除所选用户吗?',
function(btn){
if(btn == 'yes') {// 选中了是按钮
// 调用 DWR, 执行结果成功时方删除所有数据
bulletinService.delBulletin(myGrid.recordIds.toString(), function() {
// 更新界面, 来真正删除数据
Ext.Msg.alert("成功","用户数据删除成功!");
myGrid.recordIds = new Array();
myGrid.store.load({params:{start:0,limit:15}});
});
}
}
);
}
}
}]
});
myGrid.render();</PRE>
下载地址如下<A href="javascript:void(0);/*1214944957991*/">http://download.csdn.net/source/521174</A></SPAN>
本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/long0428/archive/2008/07/01/2601888.aspx
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