# EMEN2 Extensions #

**Note**: More to come...

The EMEN2 web interface can be extended fairly easily.

First, create a directory with the following structure:

<code>
<ext>/
     /%%__%%init%%__%%.py
     /views/
     /views/%%__%%init%%__%%.py
     /views/example.py
     /templates/
     /templates/example/
     /templates/example/example.mako
</code>

In example.py:

<code>
from emen2.web.view import View

@View.register
class ExampleView(View):
    @View.add_matcher(r'^/example/square/(?P<value>[^/]*)/$')
    def example_test(self, value):
        self.title = 'Example extension'
        self.template = '/example/example'
        value = int(value)
        self.ctxt['value'] = value
        self.ctxt['value_square'] = value ** 2
</code>

In example.mako:

<code>
<%inherit file="/page" />

<h1>Example</h1>

<p>This is an example of how to create a view and template.</p>

<p>The value argument was: ${value}</p>

<p>The value argument squared is ${value_square}, or ${value**2}</p>
</code>

And finally, in <ext>/views/%%__%%init%%__%%.py:

<code>
import example
</code>