EXT4.0方法如何进行好的封装

自己在项目中写了一个公用的方法，方法调用的比较多，就相当于一个window window里面的内容也比较多，现在需要吧这整个方法抽离出来，方便其他的组员进行调用，初始window里面定义的form就有2个 fileSet就更多了 还有panle等等 里面也自己定义了些ID，现在不知道如何进行好的封装，刚接触EXT也没多久，求各位亲给点思路！

[code="js"]
//mixins类
Ext.define('Canna.mixins.GridUtil', {
onAfterrender : function() {
var me = this;
if (!this.getStore && !this.getStore()) {
return;
}
this.showLoadingMark();
this.getStore().load({
callback : function() {
me.hideLoadingMark();
}
});
},
onSelectionchange : function(sm, selections) {
this.view.panel.down('#removeButton').setDisabled(
selections.length == 0);
},
onAddHandler : function() {
var panel = this.up('gridpanel');
var store = panel.getStore();
if (store.storeId == 'ext-empty-store') {
store = Ext.create('Ext.data.Store', {
model : 'Ext.data.Model',
fields : [],
proxy : 'memory'
});
panel.bindStore(store);
}
var model = store.model;
var r = Ext.create(model, {});
panel.getStore().insert(0, r);

    if (panel.rowEditingAble) {
        var rowEditing = panel.getEditPlugin();
        rowEditing.cancelEdit();
        rowEditing.startEdit(0, 0);
    }
},
onDeleteHandler : function() {
    var grid = this.up('gridpanel');
    var records = grid.getSelectionModel().getSelection();
    Ext.MessageBox.confirm('Confirm', '请确定删除!', function(buttonId) {
        if (buttonId == 'yes') {
            grid.getStore().remove(records);
        }
    });
},
showLoadingMark : function() {
    this.loadingMark = this.loadingMark || new Ext.LoadMask(this, {
        msg : 'loading...'
    });
    this.loadingMark.show();
},
hideLoadingMark : function() {
    this.loadingMark.hide();
},
getEditPlugin : function() {
    return this.getPlugin(this._pluginId);
},
addRowEditPlugin : function() {
    var me = this;
    me._pluginId = 'rowEditing' + Math.random();
    var rowEditing = Ext.create('Ext.grid.plugin.RowEditing', {
        clicksToEdit : 2,
        autoCancel : true,
        pluginId : me._pluginId
    });
    me.plugins = [ rowEditing ];
}

});

//extend 类
Ext.define('Canna.view.BaseGridPanel', {
extend : 'Ext.grid.Panel',
alias : 'widget.baseGridPanel',
mixins : [ 'Canna.mixins.GridUtil' ],
initComponent : function() {
// rowEditingAble
// checkboxModelAble
// simpleDockAble
// autoLoadStore
var me = this;
if (this.rowEditingAble) {
this.addRowEditPlugin();
}
if (this.autoLoadStore) {
this.addListener('afterrender', me.onAfterrender);
}
if (this.checkboxModelAble) {
this.selModel = Ext.create('Ext.selection.CheckboxModel', {
listeners : {
selectionchange : me.onSelectionchange
}
});
}
if (this.simpleDockAble) {
this.dockedItems = [ {
xtype : 'toolbar',
items : [ {
text : '添加',
iconCls : 'add',
handler : me.onAddHandler
}, '-', {
itemId : 'removeButton',
text : '删除',
iconCls : 'remove',
disabled : true,
handler : me.onDeleteHandler
} ]
} ];
}
this.callParent(arguments);

}

});
[/code]

使用mixins,或使用extend

ext4.0的开发现在更加面向对象了，你可以定义一个"类"，把相关方法放进去，有需要调用方法的时候，引用此"类"