CODEWITHSUNDEEP
extjs4extjs-mvc
extjs user
extjs user

Reputation: 263

override initComponent() method

I want to override initComponent( ) method of Ext.grid.column.Column class. But some how it executes all those lines. Basically I want to remove listeners from element and wants to assign it to other Element.

Ext.override(Ext.grid.column.Column, 
{     
    initComponent: function(){
         .
         .  //All lines are as it is till me.callParents(); 
         .
         .
         .
         .
         .
         .
         .
         // Initialize as a HeaderContainer
         me.callParent(arguments);

        me.on({      <<<------------------------------Do not need these.
            element:  'el',
            click:    me.onElClick,
            dblclick: me.onElDblClick,
            scope:    me
        });
        me.on({      <<<------------------------------Do not need these.
            element:    'titleEl',
            mouseenter: me.onTitleMouseOver,
            mouseleave: me.onTitleMouseOut,
            scope:      me
        });

    }

}

I do not want to attach listeners to "el" and "titleEl" so i remove those lines. But some how it still add listeners. I also write me.un() in AfterRender function. even tho it adds listener to "El" and "titleEl"

can anybody please guide me where i am wrong?????

Upvotes: 2

Views: 2257

Answers (1)

Eric
Eric

Reputation: 6995

Instead of using Ext.override, use Ext.define to create a sub-class. When you redefine the initComponent method, you can use this.superclass.superclass.initComponent.call to skip over Ext.grid.column.Column#initComponent.

Ext.define('MyApp.grid.column.Column', {
    extend: 'Ext.grid.column.Column',
    alias:  'widget.mycolumn',

    initComponent: function(){
        // Pre-initComponent from column class here

        // Ext.grid.header.Container#initComponent
        this.superclass.superclass.initComponent.call(this);

        // Do optional stuff here
    }
});

Then when you create your new columns, use xtype: 'mycolumn' to use your own implementation while still being able to use regular columns as needed.

Upvotes: 2

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