durandal, pass parameters to widget during navigation

Question

i have several singleton views in my SPA, each of these view contain the same widget.

When the view is activated i take some parameters from the activate callback and pass it to the widget and it works fine.

But if i navigate the second time into the view (with different parameters into the activate callback) the activate method of the widgets is rightly not raised.

How can i pass the fresh data to the widgets ?

I tried to make the parameter observable and subscribe it into the widget (settings.params.subscribe) and it works, but i don't think it's a good solution.

Answer 1

This should be pretty simple assuming you are returning a constructor from your widget -

View model -

var thisWidget = new widget(someArbitraryData)

function createWidget() {
    dialog.show(thisWidget);
}

// later
function updateWidget() {
    thisWidget.refreshData(newArbitraryData);
}

Widget module -

define([], function () {
    var ctor = function () {
        var self = this;
        self.data = ko.observable();
    };
    ctor.prototype.refreshData = function (newData) {
        var self = this;
        self.data(newData);
    };
    ctor.prototype.activate = function (activationData) {
        var self = this;
        self.data(activationData);
    };
});