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Thread: Dynamically add FormPanel

  1. #1

    Default Dynamically add FormPanel


    I'm extending the Panel, and would like to add a FormPanel to every new instance automatically.

    Ext.myPanel = Ext.extend(Ext.Panel, {
    	initComponent: function() {
    		Ext.myPanel.superclass.initComponent.apply(this, arguments);
    		this.add(new Ext.form.FormPanel({
    The problem is, it only works in Safari, i.e. not in Firefox or Chrome. If I change 'Ext.form.FormPanel' to 'Ext.Panel', then it works.

    In Chrome, it says: 'Uncaught TypeError: Cannot call method 'addClass' of null'.
    In Firefox: 'this.body is null'

    I tried to move the '.add' to 'onRender', to use ComponentMgr.create, to use 'this.items = ...', none of which works.

    Please, does anyone know how to add a FormPanel to every new 'myPanel'?

  2. #2
    Sencha Premium User mitchellsimoens's Avatar
    Join Date
    Mar 2007
    Gainesville, FL


    Please don't double post. I replied to your bug report that isn't an ExtJS bug.
    Mitchell Simoens @LikelyMitch

    Check out my GitHub:

    Posts are my own, not any current, past or future employer's.

  3. #3

    Default Maybe nested forms?

    If your myPanel is a descendant component of another FormPanel, then you won't be able to add a FormPanel to it, because that would mean you would have nested FormPanels, which will cause an error since it is not allowed in HTML to have form element as a child of another form element.

    Is your myPanel Panel somewhere a child of another FormPanel?

  4. #4
    Sencha User
    Join Date
    Nov 2010


    good stuff for the last tip,... that was exactly my problem

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