ractive child components - events

I'll try and make this as short and sweet as possible.
In Ractive.js, how can I listen to a custom event on a component's parent.
--or--
How can I fire a custom event on all child components.


The Ractive devs got back to me on this and v0.3.7 does not currently have support to be able to do this.

Related

Update view using Message Center?

I'm quiet new to Xamarin.Forms.
This is to clear a doubt.
Is it possible to update view using Messaging Center in Xamarin.Forms ?

The MessagingCenter is a centralized messaging service, meaning you subscribe to it, and other places raise events to it.
What you do when you receive an event is whatever you want. You can use it to update the View if you want but normally its used to update the Model and the INotifyPropertyChanged event notifies the view of any properties that have changed.
This blog article may help further.
http://www.xamarinhelp.com/messenger-service-day-7/

How to make parent component to listen, events fired by child components using eventbus in gwt

I have a custom panel with a couple of components, eg. a button and a text box.
Once the button is clicked I would like custom panel that is also the parent panel receives the event and decides what to do, like call setText on the textbox.
Is it possible to achieve this using an eventbus ?
This means that the child components need not handle their event and then relay it.

I don't know the exact classes and how they work together. But sure you could use the GWT EventBus to achieve this. Fire an event in your button class and handle this event in your custom panel. You can google or find related answers here on stackoverflow.
I think this answer will help you: How to use the GWT EventBus
It's pretty simple to fire events and handle this events in other classes in your application.

Attach event handler to KendoUI widget (View)

I am attempting to work an existing web app to use Kendo (Mobile) UI widgets.
All of the existing javascript code base is contained within AMD modules (RequireJS).
I would like to attach a 'show' event handler to a view, so that the app can request data from the back end, however the data logic is within a module, and cannot be called from the page script (and thus, I can't use Kendo data-event attributes).
I thought that I would be able to to attach an event handler in code like so:
$('#tabstrip-browse').on("show", function(e) {...});
however, the event handler is not called.
Is there a way to do this?

Seems I'm finally able to answer my own question
My issue was that I was trying to use jQuery event binding syntax to bind to the events, however, KendoUI does not expose events in a jQuery friendly/compliant way.
However, there is a way to do this using the KendoUI API

There is no standard 'show' event in javascript or jQuery. You can bind custom events, but you need to also include a way to trigger them.
Here's a trivial example:
// bind the custom event
$('#element').on('show', function(e) {
// handle the custom event
});
// trigger the custom event
$('#element').trigger('show');

There is an attach event on Durandal
https://groups.google.com/forum/#!topic/durandaljs/UQ9hXpwP_ds

Joomla: make a component act like a content plugin

I've created an admin component and now need to insert text on each page of the installing client. So I thought of using the function onContentPrepare but it's a method of a JPlugin class (a content plugin class to be exact).
Is there a way to invoke the component from the view in the same way like a plugin?

Short answer: No, you have to write a plugin. But that's not a big thing.
Long answer: On each request, exactly one component is called. Plugins are triggered at certain events within the control flow. The onContentPrepare event is triggered by the components (not from the Joomla! framework), so some components might not support it. Nevertheless, you can get access to the content of any component through plugins anyway - just use the onAfterRender event of the system plugins.

WP7 should we add event handler in XAML?

I 've seen many WP7 applications, some place event handlers in code, some place event handlers in XAML
Should we add event handler in XAML?
Does that handler automatically unsubscribe to the event when the page is navigated from ?

You can do either, it really doesn't matter! And no, you do not have to worry about adding / removing event handlers when the user navigates from one page to the next. When a page is no longer needed, it is destroyed.
The only time you might want to handle things differently is if you are using the MVVM pattern, when you might want to use commands rather than event handlers.

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