Results 1 to 6 of 6

Thread: Params to constructor/init of an extended class?

Hybrid View

Previous Post Previous Post   Next Post Next Post
  1. #1

    Default Params to constructor/init of an extended class?

    How to pass params to a Extended class?
    i.e

    Code:
    MyWindow = Ext.extend(Ext.Window, {
        title: 'My Window ' + param1,
        initComponent: function() {
            this.items = [
    			{
    				xtype: 'panel',
    				html: param2
    			}
        }
    });
    Because i need use that params when create a new window...

  2. #2
    Sencha User
    Join Date
    Sep 2009
    Location
    Calgary, Alberta, Canada
    Posts
    638

    Default

    Code:
    constructor: function(config) {
        config = config || {};
        // Your config are the parameters that you pass.
        Ext.apply(this, config);
        MyWindow.superclass.constructor.call(this);
    }

  3. #3

    Default

    Thanks very much CrazyEnigma =D

    I don't understand what "config = config || {};" does tho

  4. #4
    Sencha Premium Member steffenk's Avatar
    Join Date
    Jul 2007
    Location
    Haan, Germany
    Posts
    2,676

    Default

    config is config or (if not exists) an empty object. Such expression is needed so config isn't undefined.

    It's a shorter form of

    Code:
    config = config !== 'undefined' ? config : {};
    vg Steffen
    --------------------------------------
    Release Manager of TYPO3 4.5

  5. #5

    Default

    Oh Thanks steffenk =D

    Very useful!

  6. #6

    Default

    [SOLVED]
    Hello again guys,

    I've tried that but got an error.

    Code:
    adicionarBonus = Ext.extend(adicionarBonusUi, {
    	constructor: function(cfg) {
    		cfg = cfg || {};		
    		adicionarBonus.superclass.constructor.call(this, Ext.apply(this, cfg));
    	},
        initComponent: function() {
            adicionarBonus.superclass.initComponent.call(this);
        }
    });
    Firebug show the error:
    h.directCfg is undefined =(

    That is an extended window with a grid (the grid uses a directfn, i will do that to populate the grid using a param from the constructor)


    SOLVED. The problem was on Ext Designer Expor, if you has got same problem look here:

    http://www.extjs.com/forum/showthrea...ight=DirectCfg
    Last edited by jvolt; 30 May 2010 at 6:11 PM. Reason: SOLVED

Similar Threads

  1. Passing parameters to extended class constructor
    By Greendrake in forum Ext 2.x: Help & Discussion
    Replies: 7
    Last Post: 16 Dec 2009, 8:04 AM
  2. change extended Metagrid url and store params
    By AndrewY in forum Ext 3.x: Help & Discussion
    Replies: 5
    Last Post: 29 Oct 2009, 12:30 AM
  3. Extended Class: Is Not A Constructor
    By Chris55 in forum Ext 3.x: Help & Discussion
    Replies: 2
    Last Post: 1 Oct 2009, 11:57 AM
  4. getForm() From an Extended Class
    By learningExt in forum Ext 2.x: Help & Discussion
    Replies: 6
    Last Post: 1 Jul 2008, 6:35 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •