How does a mixin reference another one of its method from within itself?

[Cisco Kid]

I want MyHelperMixin.otherMethod() to be able to call MyHelperMixin.firstMethod() without calling from MyView because MyOtherView is also using the same mixin and otherMethod will not know whether it is being called from MyView or MyOtherView.

Ext.define('MyHelperMixin', {
    firstMethod: function () {
        this.setHtml('this worked');
    },

    otherMethod: function () {
        // I want to call firstMethod() from here without going through MyView or MyOtherView 
        // (or if I do call through them, it would need to be generically, such that it could be from any view)
        // because various other views use MyHelperMixin as a helper class
    },
});


Ext.define('MyView', {
    extend : 'Ext.Container',
    mixins: [
        'myMixins/MyHelperMixin',
    ],
    xtype: 'myview',


    initialize : function() {
        this.callParent();
    }
});


Ext.define('MyOtherView', {
    extend : 'Ext.Container',
    mixins: [
        'myMixins/MyHelperMixin',
    ],
    xtype: 'myview',


    initialize : function() {
        this.callParent();
    }
});

[evant]

Those methods just get mixed into the class, so they act as class methods. Just call it directly "this.firstMethod()"

[Cisco Kid]

Sorry, I did not do a sufficient job with my post - more specifically, the reason I cannot use 'this' inside my helper method is because the shared method is actually a button handler, so this references the button component, NOT the page component like below. I want to put limitedUniqueId outside cloneHandler (like firstUniqueId), but I do not know how to reference it from within cloneHandler.

Ext.define('MyHelperMixin', {

    firstUniqueId: function (cfg) {
         var j = 0;
         var num = j;
         var newItmId, i, matched;
         var clones = cfg.clones;
         var cloneCt = clones.length;

         // this loop ensures that the new itemId does not already exist 
         do {
             matched = false;
             num++;
             newItmId = cfg.id + '-' + num;
             for (i = j; i < cloneCt; i++) {
                 if (clones[i].itemId === newItmId) {
                     matched = true;
                     // if match is at the front, skip it next time...
                     if (i === j) {
                         j++;
                     };
                     // we found a match, no need to look anymore...
                     break;
                 }
             }
         } while (matched);// loop until the item[i].itemId does not match

         return num;  
    },

    cloneHandler: function (btn) {
        // I want to call firstUniqueId() from here without going through MyView or MyOtherView 
        // (or if I do call through them, it would need to be generically, such that it could be from any view)
        // because various other views use MyHelperMixin as a helper class

        var cfg = btn.handlerConfig;
        var xtype = cfg.prefix + '-' + cfg.id'
        var itemToClone = btn.up(xtype);
        var container = itemToClone.up();
        var items = container.query(xtype);
        // I want to call firstUniqueId() above (outside this method), NOT limitedUniqueId below...
        var uniqueId = limitedUniqueId({
                id: cfg.id,
                clones: items
            });

        function limitedUniqueId(cfg) {
            // same logic as firstUniqueId() above
            return num;            
        }
    },
});

Ext.define('MyView', {
    extend : 'Ext.Container',
    mixins: [
        'myMixins/MyHelperMixin',
    ],
    xtype: 'myview',

    initComponent: function() {
        var me = this;

        me.items = [{            itemId: 'add-btn',
            handlerConfig: {
                prefix: 'someName',
                id: 'myId',
            },
            handler: me.cloneHandler
        }];

        me.callParent(arguments);
    },
});

Ext.define('MyOtherView', {
    extend : 'Ext.Container',
    mixins: [
        'myMixins/MyHelperMixin',
    ],
    xtype: 'myview',

    initComponent: function() {
        var me = this;

        me.items = [{
            itemId: 'clone-btn',
            handlerConfig: {
                prefix: 'anotherName',
                id: 'anotherId',
            },
            handler: me.cloneHandler
        }];

        me.callParent(arguments);
    },
});

[evant]

Specify the scope along with the handler:

{
    handler: me.cloneHandler,
    scope: me
}

Which means that the button handler will run in the context of 'MyView'.