Is Sencha Touch supporting touchcancel and touchleave events for a component

hi,

I see only touchstart, touchmove and touchend events for a component in sencha touch kitchen sink example.

I tried implementing touchcancel and touchleave actions for a html5 canvas control extending Ext.Component but did not see those are firing. Is sencha touch really supporting these?

Code:

Ext.define('Forms.MobileControls.Standard.Canvas', {
    extend: 'Ext.Component',
    xtype: 'canvas',
    getElementConfig: function () {
        return {
            reference: 'element',
            classList: ['x-unsized'],
            children: this.getTemplate(),
            tag: 'canvas'
        };
    },
    config: {
        eventConfigArray: [],
        ctx: null,       // is set when rendered
        canvas: null,    // is set when rendered
        applyStyle: false,
        styleSettings: null,
        border: 0,
        borderColor: '',
        backGroundColour: '',
        listeners: {
            element: 'element',
            touchstart: function () {
                this.fireEvent('touchstart', this, null);
            },
            touchmove: function () {
                this.fireEvent('touchmove', this, null);
            },
            touchend: function () {
                this.fireEvent('touchend', this, null);
            },
            touchcancel: function () {
                this.fireEvent('touchcancel', this, null);
            },
            touchleave: function () {
                this.fireEvent('touchleave', this, null);
            },
        }
    }
..
}

Thanks,

Naresh