checkbox.js

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/*
 * Ext JS Library 3.0 Pre-alpha
 * Copyright(c) 2006-2008, Ext JS, LLC.
 * [e-mail]
 * 
 * http://extjs.com/license
 */

/**
 * @class Ext.form.Checkbox
 * @extends Ext.form.Field
 * Single checkbox field.  Can be used as a direct replacement for traditional checkbox fields.
 * @constructor
 * Creates a new Checkbox
 * @param {Object} config Configuration options
 * @xtype checkbox
 */
Ext.form.Checkbox = Ext.extend(Ext.form.Field,  {
    /**
     * @cfg {String} focusClass The CSS class to use when the checkbox receives focus (defaults to undefined)
     */
    focusClass : undefined,
    /**
     * @cfg {String} fieldClass The default CSS class for the checkbox (defaults to "x-form-field")
     */
    fieldClass: "x-form-field",
    /**
     * @cfg {Boolean} checked True if the the checkbox should render already checked (defaults to false)
     */
    checked: false,
    /**
     * @cfg {String/Object} autoCreate A DomHelper element spec, or true for a default element spec (defaults to
     * {tag: "input", type: "checkbox", autocomplete: "off"})
     */
    defaultAutoCreate : { tag: "input", type: 'checkbox', autocomplete: "off"},
    /**
     * @cfg {String} boxLabel The text that appears beside the checkbox
     */
    /**
     * @cfg {String} inputValue The value that should go into the generated input element's value attribute
     */

	// private
    initComponent : function(){
        Ext.form.Checkbox.superclass.initComponent.call(this);
        this.addEvents(
            /**
             * @event check
             * Fires when the checkbox is checked or unchecked.
             * @param {Ext.form.Checkbox} this This checkbox
             * @param {Boolean} checked The new checked value
             */
            'check'
        );
    },

    // private
    onResize : function(){
        Ext.form.Checkbox.superclass.onResize.apply(this, arguments);
        if(!this.boxLabel){
            this.el.alignTo(this.wrap, 'c-c');
        }
    },

    // private
    initEvents : function(){
        Ext.form.Checkbox.superclass.initEvents.call(this);
        this.mon(this.el, 'click', this.onClick, this);
        this.mon(this.el, 'change', this.onClick, this);
    },

	// private
    getResizeEl : function(){
        return this.wrap;
    },

    // private
    getPositionEl : function(){
        return this.wrap;
    },

    /**
     * Overridden and disabled. The editor element does not support standard valid/invalid marking. @hide
     * @method
     */
    markInvalid : Ext.emptyFn,
    /**
     * Overridden and disabled. The editor element does not support standard valid/invalid marking. @hide
     * @method
     */
    clearInvalid : Ext.emptyFn,

    // private
    onRender : function(ct, position){
        Ext.form.Checkbox.superclass.onRender.call(this, ct, position);
        if(this.inputValue !== undefined){
            this.el.dom.value = this.inputValue;
        }
        this.wrap = this.el.wrap({cls: "x-form-check-wrap"});
        if(this.boxLabel){
            this.wrap.createChild({tag: 'label', htmlFor: this.el.id, cls: 'x-form-cb-label', html: this.boxLabel});
        }
        if(this.checked){
            this.setValue(true);
        }else{
            this.checked = this.el.dom.checked;
        }
    },

    // private
    onDestroy : function(){
        if(this.wrap){
            this.wrap.remove();
        }
        Ext.form.Checkbox.superclass.onDestroy.call(this);
    },

    // private
    initValue : Ext.emptyFn,

    /**
     * Returns the checked state of the checkbox.
     * @return {Boolean} True if checked, else false
     */
    getValue : function(){
        if(this.rendered){
            return this.el.dom.checked;
        }
        return false;
    },

	// private
    onClick : function(){
        if(this.el.dom.checked != this.checked){
            this.setValue(this.el.dom.checked);
        }
    },

    /**
     * Sets the checked state of the checkbox.
     * @param {Boolean/String} checked True, 'true', '1', or 'on' to check the checkbox, any other value will uncheck it.
     * @return {Ext.form.Field} this
     */
    setValue : function(v){
        this.checked = (v === true || v === 'true' || v == '1' || String(v).toLowerCase() == 'on');
        if(this.el && this.el.dom){
            this.el.dom.checked = this.checked;
            this.el.dom.defaultChecked = this.checked;
        }
        this.fireEvent("check", this, this.checked);
        return this;
    }
});
Ext.reg('checkbox', Ext.form.Checkbox);