需求说明，今天在需求时候，顾客在要求可以从多个部门查询，于是乎做了这个。
实现结果：
实现代码
保存为Ext.ux.form.LovCombo在项目中引用
// vim: ts=4:sw=4:nu:fdc=4:nospell
/**
* Ext.ux.form.LovCombo, List of Values Combo
*
* @author Ing. Jozef Sakáloš
* @copyright (c) 2008, by Ing. Jozef Sakáloš
* @date 16. April 2008
* @version $Id: Ext.ux.form.LovCombo.js 285 2008-06-06 09:22:20Z jozo $
*
* @license Ext.ux.form.LovCombo.js is licensed under the terms of the Open Source
* LGPL 3.0 license. Commercial use is permitted to the extent that the
* code/component(s) do NOT become part of another Open Source or Commercially
* licensed development library or toolkit without explicit permission.
*
* License details: http://www.gnu.org/licenses/lgpl.html
*/
/*global Ext */
// add RegExp.escape if it has not been already added
if('function' !== typeof RegExp.escape) {
RegExp.escape = function(s) {
if('string' !== typeof s) {
return s;
}
// Note: if pasting from forum, precede ]/\ with backslash manually
return s.replace(/([.*+?^=!:${}()|[\]\/\\])/g, '\\$1');
}; // eo function escape
}
// create namespace
Ext.ns('Ext.ux.form');
/**
*
* @class Ext.ux.form.LovCombo
* @extends Ext.form.ComboBox
*/
Ext.ux.form.LovCombo = Ext.extend(Ext.form.ComboBox, {
// {{{
// configuration options
/**
* @cfg {String} checkField name of field used to store checked state.
* It is automatically added to existing fields.
* Change it only if it collides with your normal field.
*/
checkField:'checked'
/**
* @cfg {String} separator separator to use between values and texts
*/
,separator:','
/**
* @cfg {String/Array} tpl Template for items.
* Change it only if you know what you are doing.
*/
// }}}
// {{{
,initComponent:function() {
// template with checkbox
if(!this.tpl) {
this.tpl =
'<tpl for=".">'
+'<div class="x-combo-list-item">'
+'<img src="' + Ext.BLANK_IMAGE_URL + '" '
+'class="ux-lovcombo-icon ux-lovcombo-icon-'
+'{[values.' + this.checkField + '?"checked":"unchecked"' + ']}">'
+'<div class="ux-lovcombo-item-text">{' + (this.displayField || 'text' )+ '}</div>'
+'</div>'
+'</tpl>'
;
}
// call parent
Ext.ux.form.LovCombo.superclass.initComponent.apply(this, arguments);
// install internal event handlers
this.on({
scope:this
,beforequery:this.onBeforeQuery
,blur:this.onRealBlur
});
// remove selection from input field
this.onLoad = this.onLoad.createSequence(function() {
if(this.el) {
var v = this.el.dom.value;
this.el.dom.value = '';
this.el.dom.value = v;
}
});
} // e/o function initComponent
// }}}
// {{{
/**
* Disables default tab key bahavior
* @private
*/
,initEvents:function() {
Ext.ux.form.LovCombo.superclass.initEvents.apply(this, arguments);
// disable default tab handling - does no good
this.keyNav.tab = false;
} // eo function initEvents
// }}}
// {{{
/**
* clears value
*/
,clearValue:function() {
this.value = '';
this.setRawValue(this.value);
this.store.clearFilter();
this.store.each(function(r) {
r.set(this.checkField, false);
}, this);
if(this.hiddenField) {
this.hiddenField.value = '';
}
this.applyEmptyText();
} // eo function clearValue
// }}}
// {{{
/**
* @return {String} separator (plus space) separated list of selected displayFields
* @private
*/
,getCheckedDisplay:function() {
var re = new RegExp(this.separator, "g");
return this.getCheckedValue(this.displayField).replace(re, this.separator + ' ');
} // eo function getCheckedDisplay
// }}}
// {{{
/**
* @return {String} separator separated list of selected valueFields
* @private
*/
,getCheckedValue:function(field) {
field = field || this.valueField;
var c = [];
// store may be filtered so get all records
var snapshot = this.store.snapshot || this.store.data;
snapshot.each(function(r) {
if(r.get(this.checkField)) {
c.push(r.get(field));
}
}, this);
return c.join(this.separator);
} // eo function getCheckedValue
// }}}
// {{{
/**
* beforequery event handler - handles multiple selections
* @param {Object} qe query event
* @private
*/
,onBeforeQuery:function(qe) {
qe.query = qe.query.replace(new RegExp(this.getCheckedDisplay() + '[ ' + this.separator + ']*'), '');
} // eo function onBeforeQuery
// }}}
// {{{
/**
* blur event handler - runs only when real blur event is fired
*/
,onRealBlur:function() {
this.list.hide();
var rv = this.getRawValue();
var rva = rv.split(new RegExp(RegExp.escape(this.separator) + ' *'));
var va = [];
var snapshot = this.store.snapshot || this.store.data;
// iterate through raw values and records and check/uncheck items
Ext.each(rva, function(v) {
snapshot.each(function(r) {
if(v === r.get(this.displayField)) {
va.push(r.get(this.valueField));
}
}, this);
}, this);
this.setValue(va.join(this.separator));
this.store.clearFilter();
} // eo function onRealBlur
// }}}
// {{{
/**
* Combo's onSelect override
* @private
* @param {Ext.data.Record} record record that has been selected in the list
* @param {Number} index index of selected (clicked) record
*/
,onSelect:function(record, index) {
if(this.fireEvent('beforeselect', this, record, index) !== false){
// toggle checked field
record.set(this.checkField, !record.get(this.checkField));
// display full list
if(this.store.isFiltered()) {
this.doQuery(this.allQuery);
}
// set (update) value and fire event
this.setValue(this.getCheckedValue());
this.fireEvent('select', this, record, index);
}
} // eo function onSelect
// }}}
// {{{
/**
* Sets the value of the LovCombo
* @param {Mixed} v value
*/
,setValue:function(v) {
if(v) {
v = '' + v;
if(this.valueField) {
this.store.clearFilter();
this.store.each(function(r) {
var checked = !(!v.match(
'(^|' + this.separator + ')' + RegExp.escape(r.get(this.valueField))
+'(' + this.separator + '|$)'))
;
r.set(this.checkField, checked);
}, this);
this.value = this.getCheckedValue();
this.setRawValue(this.getCheckedDisplay());
if(this.hiddenField) {
this.hiddenField.value = this.value;
}
}
else {
this.value = v;
this.setRawValue(v);
if(this.hiddenField) {
this.hiddenField.value = v;
}
}
if(this.el) {
this.el.removeClass(this.emptyClass);
}
}
else {
this.clearValue();
}
} // eo function setValue
// }}}
// {{{
/**
* Selects all items
*/
,selectAll:function() {
this.store.each(function(record){
// toggle checked field
record.set(this.checkField, true);
}, this);
//display full list
this.doQuery(this.allQuery);
this.setValue(this.getCheckedValue());
} // eo full selectAll
// }}}
// {{{
/**
* Deselects all items. Synonym for clearValue
*/
,deselectAll:function() {
this.clearValue();
} // eo full deselectAll
// }}}
// 修正 : 当多选控件放到grid中时，grideditor会调用combobox中的这个方法。将选中的显示值传入到setvalue中，导致选择丢失。
,assertValue : function(){
var val = this.getRawValue(),
rec,arr_rec,i=0;
// 分离value为数组，循环取rec
var arr_val = val.split(this.separator);
var arr_value = this.value.split(this.separator);
for(;i<arr_val.length;i++){
if(this.valueField && Ext.isDefined(arr_value[i])){
rec = this.findRecord(this.valueField, arr_value[i]);
}
if(!rec || rec.get(this.displayField) != arr_val[i].trim()){
rec = this.findRecord(this.displayField, arr_val[i].trim());
}
if(rec && !arr_rec){
arr_rec = [];
}
if(rec){
arr_rec.push(rec);
}
}
if(!arr_rec && this.forceSelection){
if(val.length > 0 && val != this.emptyText){
this.el.dom.value = Ext.value(this.lastSelectionText, '');
this.applyEmptyText();
}else{
this.clearValue();
}
}else{
if(arr_rec && this.valueField){
// onSelect may have already set the value and by doing so
// set the display field properly. Let's not wipe out the
// valueField here by just sending the displayField.
if (this.value == val){
return;
}
i = 0;
val = "";
var ival;
for(;i<arr_rec.length;i++){
ival = arr_rec[i].get(this.valueField);
if(!ival){
ival = arr_rec[i].get(this.displayField);
}
if(i ==0 ){
val = ival;
}else{
val = val+","+ival;
}
}
}
this.setValue(val);
}
}
}); // eo extend
// register xtype
Ext.reg('lovcombo', Ext.ux.form.LovCombo);
// eof
CSS
/** vim: ts=4:sw=4:nu:fdc=4:nospell
*
* Ext.ux.form.LovCombo CSS File
*
* @author Ing.Jozef Sak谩lo拧
* @copyright (c) 2008, by Ing. Jozef Sak谩lo拧
* @date 5. April 2008
* @version $Id: Ext.ux.form.LovCombo.css 189 2008-04-16 21:01:06Z jozo $
*
* @license Ext.ux.form.LovCombo.css is licensed under the terms of the Open Source
* LGPL 3.0 license. Commercial use is permitted to the extent that the
* code/component(s) do NOT become part of another Open Source or Commercially
* licensed development library or toolkit without explicit permission.
*
* License details: http://www.gnu.org/licenses/lgpl.html
*/
.ux-lovcombo-icon {
width:16px;
height:16px;
float:left;
background-position: -1px -1px ! important;
background-repeat:no-repeat ! important;
}
.ux-lovcombo-icon-checked {
background: transparent url(../ext3/resources/images/default/menu/checked.gif);
}
.ux-lovcombo-icon-unchecked {
background: transparent url(../ext3/resources/images/default/menu/unchecked.gif);
}
/* eof */
注意调整你的checked.gif 和 uncheck.gif的位置
使用案例：
{
anchor: "99%",
fieldLabel: "按部门查询",
xtype: "lovcombo",
name: "Q_teacherName_S_LK",
hideOnSelect:false,
mode: "local",
editable: false,
triggerAction: "all",
valueField: "depName",
displayField: "depName",
store: new Ext.data.JsonStore({
root: "result",
autoLoad: true,
url: __ctxPath + "/system/selectDepartment.action",
fields: ["depId", "depName"]
})
}
作者：Dracotianlong 发表于2013-3-1 23:12:40 原文链接
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