Extjs之客户端查询

  和大家分享一个我在www.extjs.com上找的插件，该插件可以执行客户端查询，说白了就是只能在本页做查询动作，没有和服务器交互.代码如下

// vim: ts=4:sw=4:nu:fdc=4:nospell

/**

 * Search plugin for Ext.grid.GridPanel, Ext.grid.EditorGrid ver. 2.x or subclasses of them

 *

 * @author    Ing. Jozef Sakalos

 * @copyright (c) 2008, by Ing. Jozef Sakalos

 * @date      17. January 2008

 * @version   $Id: Ext.ux.grid.Search.js 120 2008-03-31 00:09:05Z jozo $

 *

 * @license Ext.ux.grid.Search 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 */



Ext.ns('Ext.ux.grid');



/**

 * @class Ext.ux.grid.Search

 * @extends Ext.util.Observable

 * @param {Object} config configuration object

 * @constructor

 */

Ext.ux.grid.Search = function(config) {

    Ext.apply(this, config);

    Ext.ux.grid.Search.superclass.constructor.call(this);

}; // eo constructor



Ext.extend(Ext.ux.grid.Search, Ext.util.Observable, {

    /**

     * @cfg {String} searchText Text to display on menu button

     */

     searchText:'Search'



    /**

     * @cfg {String} searchTipText Text to display as input tooltip. Set to '' for no tooltip

     */

    ,searchTipText:'Type a text to search and press Enter'



    /**

     * @cfg {String} selectAllText Text to display on menu item that selects all fields

     */

    ,selectAllText:'Select All'



    /**

     * @cfg {String} position Where to display the search controls. Valid values are top and bottom (defaults to bottom)

     * Corresponding toolbar has to exist at least with mimimum configuration tbar:[] for position:top or bbar:[]

     * for position bottom. Plugin does NOT create any toolbar.

     */

    ,position:'bottom'



    /**

     * @cfg {String} iconCls Icon class for menu button (defaults to icon-magnifier)

     */

    ,iconCls:'icon-magnifier'



    /**

     * @cfg {String/Array} checkIndexes Which indexes to check by default. Can be either 'all' for all indexes

     * or array of dataIndex names, e.g. ['persFirstName', 'persLastName']

     */

    ,checkIndexes:'all'



    /**

     * @cfg {Array} disableIndexes Array of index names to disable (not show in the menu), e.g. ['persTitle', 'persTitle2']

     */

    ,disableIndexes:[]



    /**

     * @cfg {String} dateFormat how to format date values. If undefined (the default)

     * date is formatted as configured in colummn model

     */

    ,dateFormat:undefined



    /**

     * @cfg {Boolean} showSelectAll Select All item is shown in menu if true (defaults to true)

     */

    ,showSelectAll:true



    /**

     * @cfg {String} mode Use 'remote' for remote stores or 'local' for local stores. If mode is local

     * no data requests are sent to server the grid's store is filtered instead (defaults to 'remote')

     */

    ,mode:'remote'



    /**

     * @cfg {Number} width Width of input field in pixels (defaults to 100)

     */

    ,width:100



    /**

     * @cfg {String} xtype xtype is usually not used to instantiate this plugin but you have a chance to identify it

     */

    ,xtype:'gridsearch'



    /**

     * @cfg {Object} paramNames Params name map (defaults to {fields:'fields', query:'query'}

     */

    ,paramNames: {

         fields:'fields'

        ,query:'query'

    }



    /**

     * @cfg {String} shortcutKey Key to fucus the input field (defaults to r = Sea_r_ch). Empty string disables shortcut

     */

    ,shortcutKey:'r'



    /**

     * @cfg {String} shortcutModifier Modifier for shortcutKey. Valid values: alt, ctrl, shift (defaults to alt)

     */

    ,shortcutModifier:'alt'



    /**

     * @cfg {String} align 'left' or 'right' (defaults to 'left')

     */



    /**

     * @cfg {Number} minLength force user to type this many character before he can make a search

     */



    /**

     * @cfg {Ext.Panel/String} toolbarContainer Panel (or id of the panel) which contains toolbar we want to render

     * search controls to (defaults to this.grid, the grid this plugin is plugged-in into)

     */



    // {{{

    /**

     * private

     * @param {Ext.grid.GridPanel/Ext.grid.EditorGrid} grid reference to grid this plugin is used for

     */

    ,init:function(grid) {

        this.grid = grid;



        // setup toolbar container if id was given

        if('string' === typeof this.toolbarContainer) {

            this.toolbarContainer = Ext.getCmp(this.toolbarContainer);

        }



        // do our processing after grid render and reconfigure

        grid.onRender = grid.onRender.createSequence(this.onRender, this);

        grid.reconfigure = grid.reconfigure.createSequence(this.reconfigure, this);

    } // eo function init

    // }}}

    // {{{

    /**

     * private add plugin controls to <b>existing</b> toolbar and calls reconfigure

     */

    ,onRender:function() {

        var panel = this.toolbarContainer || this.grid;

        var tb = 'bottom' === this.position ? panel.bottomToolbar : panel.topToolbar;



        // add menu

        this.menu = new Ext.menu.Menu();



        // handle position

        if('right' === this.align) {

            tb.addFill();

        }

        else {

            tb.addSeparator();

        }



        // add menu button

        tb.add({

             text:this.searchText

            ,menu:this.menu

            ,iconCls:this.iconCls

        });



        // add input field (TwinTriggerField in fact)

        this.field = new Ext.form.TwinTriggerField({

             width:this.width

            ,selectOnFocus:undefined === this.selectOnFocus ? true : this.selectOnFocus

            ,trigger1Class:'x-form-clear-trigger'

            ,trigger2Class:'x-form-search-trigger'

            ,onTrigger1Click:this.onTriggerClear.createDelegate(this)

            ,onTrigger2Click:this.onTriggerSearch.createDelegate(this)

            ,minLength:this.minLength

        });



        // install event handlers on input field

        this.field.on('render', function() {

            this.field.el.dom.qtip = this.searchTipText;



            // install key map

            var map = new Ext.KeyMap(this.field.el, [{

                 key:Ext.EventObject.ENTER

                ,scope:this

                ,fn:this.onTriggerSearch

            },{

                 key:Ext.EventObject.ESC

                ,scope:this

                ,fn:this.onTriggerClear

            }]);

            map.stopEvent = true;

        }, this, {single:true});



        tb.add(this.field);



        // reconfigure

        this.reconfigure();



        // keyMap

        if(this.shortcutKey && this.shortcutModifier) {

            var shortcutEl = this.grid.getEl();

            var shortcutCfg = [{

                 key:this.shortcutKey

                ,scope:this

                ,stopEvent:true

                ,fn:function() {

                    this.field.focus();

                }

            }];

            shortcutCfg[0][this.shortcutModifier] = true;

            this.keymap = new Ext.KeyMap(shortcutEl, shortcutCfg);

        }

    } // eo function onRender

    // }}}

    // {{{

    /**

     * private Clear Trigger click handler

     */

    ,onTriggerClear:function() {

        this.field.setValue('');

        this.field.focus();

        this.onTriggerSearch();

    } // eo function onTriggerClear

    // }}}

    // {{{

    /**

     * private Search Trigger click handler (executes the search, local or remote)

     */

    ,onTriggerSearch:function() {

        if(!this.field.isValid()) {

            return;

        }

        var val = this.field.getValue();

        var store = this.grid.store;



        // grid's store filter

        if('local' === this.mode) {

            store.clearFilter();

            if(val) {

                store.filterBy(function(r) {

                    var retval = false;

                    this.menu.items.each(function(item) {

                        if(!item.checked || retval) {

                            return;

                        }

                        var rv = r.get(item.dataIndex);

                        rv = rv instanceof Date ? rv.format(this.dateFormat || r.fields.get(item.dataIndex).dateFormat) : rv;

                        var re = new RegExp(val, 'gi');

                        retval = re.test(rv);

                    }, this);

                    if(retval) {

                        return true;

                    }

                    return retval;

                }, this);

            }

            else {

            }

        }

        // ask server to filter records

        else {

            // clear start (necessary if we have paging)

            if(store.lastOptions && store.lastOptions.params) {

                store.lastOptions.params[store.paramNames.start] = 0;

            }



            // get fields to search array

            var fields = [];

            this.menu.items.each(function(item) {

                if(item.checked) {

                    fields.push(item.dataIndex);

                }

            });



            // add fields and query to baseParams of store

            delete(store.baseParams[this.paramNames.fields]);

            delete(store.baseParams[this.paramNames.query]);

            if (store.lastOptions && store.lastOptions.params) {

                delete(store.lastOptions.params[this.paramNames.fields]);

                delete(store.lastOptions.params[this.paramNames.query]);

            }

            if(fields.length) {

                store.baseParams[this.paramNames.fields] = Ext.encode(fields);

                store.baseParams[this.paramNames.query] = val;

            }



            // reload store

            store.reload();

        }



    } // eo function onTriggerSearch

    // }}}

    // {{{

    /**

     * @param {Boolean} true to disable search (TwinTriggerField), false to enable

     */

    ,setDisabled:function() {

        this.field.setDisabled.apply(this.field, arguments);

    } // eo function setDisabled

    // }}}

    // {{{

    /**

     * Enable search (TwinTriggerField)

     */

    ,enable:function() {

        this.setDisabled(false);

    } // eo function enable

    // }}}

    // {{{

    /**

     * Enable search (TwinTriggerField)

     */

    ,disable:function() {

        this.setDisabled(true);

    } // eo function disable

    // }}}

    // {{{

    /**

     * private (re)configures the plugin, creates menu items from column model

     */

    ,reconfigure:function() {



        // {{{

        // remove old items

        var menu = this.menu;

        menu.removeAll();



        // add Select All item plus separator

        if(this.showSelectAll) {

            menu.add(new Ext.menu.CheckItem({

                 text:this.selectAllText

                ,checked:!(this.checkIndexes instanceof Array)

                ,hideOnClick:false

                ,handler:function(item) {

                    var checked = ! item.checked;

                    item.parentMenu.items.each(function(i) {

                        if(item !== i && i.setChecked) {

                            i.setChecked(checked);

                        }

                    });

                }

            }),'-');

        }



        // }}}

        // {{{

        // add new items

        var cm = this.grid.colModel;

        Ext.each(cm.config, function(config) {

            var disable = false;

            if(config.header && config.dataIndex) {

                Ext.each(this.disableIndexes, function(item) {

                    disable = disable ? disable : item === config.dataIndex;

                });

                if(!disable) {

                    menu.add(new Ext.menu.CheckItem({

                         text:config.header

                        ,hideOnClick:false

                        ,checked:'all' === this.checkIndexes

                        ,dataIndex:config.dataIndex

                    }));

                }

            }

        }, this);

        // }}}

        // {{{

        <span 

  


  
    
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