add support for event target information #51

[lordvlad]

Quick and easy fix for #51

For now, the event object has another dictionary added at the key target, containing (for now) only the tag name, id and class name of the target element.

[jifcon]

Hi lordvlad,

Do you have an example on how to use the target feature? I'm looking for a way to know which element is calling the event (the idea is to have some icons and the same method i.e. on_click and perform some actions depending on the element that is calling the on_click method).

Thanks++!

[lordvlad]

this feature is not merged yet, but once merged, you could do

    from ipywidgets import Label, HTML, HBox, Image, VBox, Box, HBox
    from ipyevents import Event 
    from IPython.display import display

    l = HTML('''
        <button id=eeny>eeny</button>
        <button id=meeny>meeny</button>
        <button id=miny>miny</button>
        <button id=moe>moe</button>
    ''')

    h = HTML('Event info')
    d = Event(source=l, watched_events=['click'])

    def handle_event(event):
        h.value = "You clicked %s" % event["target"]["id"]

    d.on_dom_event(handle_event)

    display(l, h)

[lordvlad]

bump

[mwcraig]

@lordvlad -- sorry it took roughly forever to respond to this. I added some explanation to the demo notebook -- does that look good to you?

[lordvlad]

looks great! thanks

[mwcraig]

Thanks, @lordvlad, merging -- I should have this released by Friday.

[mwcraig]

@lordvlad -- this has been released in 0.9.0. I'm planning to release the first stable version, 2.0.0, tomorrow.

0.9.0 supports jlab 2 and 3. The stable release will support only jlab3 and higher.