var tuio = {
    cursors: [],
    objects: [],

    _data: {},

    _cb_object_add:    function(obj) { },
    _cb_object_update: function(obj) { },
    _cb_object_remove: function(obj) { },
    _cb_cursor_add:    function(cur) { },
    _cb_cursor_update: function(cur) { },
    _cb_cursor_remove: function(cur) { },

    // Callback from the main event handler

    callback: function(type, sid, fid, x, y, angle) {
        var data;
        
        if ((type != 0) && (type != 3)) {
            data = this._data[sid];
        }
        else {
            data = {
                sid: sid,
                fid: fid
            }
            this._data[sid] = data;
        }

        data.x = x;
        data.y = y;
        
        if (type < 3) {
            data.angle = angle;
        }

        switch (type) {
            case 0: 
                this.objects.push(data);
                this._cb_object_add(data);
                break;

            case 1: 
                this._cb_object_update(data);
                break;

            case 2: 
                this.objects.splice(this.objects.indexOf(data), 1);
                this._cb_object_remove(data);
                break;

            case 3: 
                this.cursors.push(data);
                this._cb_cursor_add(data);
                break;

            case 4: 
                this._cb_cursor_update(data);
                break;

            case 5: 
                this.cursors.splice(this.cursors.indexOf(data), 1);
                this._cb_cursor_remove(data);
                break;

            default:
                break;
        }

        if ((type == 2) || (type == 5)) {
            delete this._data[sid];
        }
    },

    // Callback for the developer

    object_add:    function(f) { this._cb_object_add    = f; },
    object_update: function(f) { this._cb_object_update = f; },
    object_remove: function(f) { this._cb_object_remove = f; },
    cursor_add:    function(f) { this._cb_cursor_add    = f; },
    cursor_update: function(f) { this._cb_cursor_update = f; },
    cursor_remove: function(f) { this._cb_cursor_remove = f; },
}

function tuio_callback(type, sid, fid, x, y, angle)    {
    tuio.callback(type, sid, fid, x, y, angle);
}