===============
Password Widget
===============
The password widget allows you to upload a new password to the server. The
"password" type of the "INPUT" element is described here:
http://www.w3.org/TR/1999/REC-html401-19991224/interact/forms.html#edef-INPUT
As for all widgets, the password widget must provide the new ``IWidget``
interface:
>>> from zope.interface.verify import verifyClass
>>> from z3c.form import interfaces
>>> from z3c.form.browser import password
>>> verifyClass(interfaces.IWidget, password.PasswordWidget)
True
The widget can be instantiated only using the request:
>>> from z3c.form.testing import TestRequest
>>> request = TestRequest()
>>> widget = password.PasswordWidget(request)
Before rendering the widget, one has to set the name and id of the widget:
>>> widget.id = 'widget.id'
>>> widget.name = 'widget.name'
We also need to register the template for the widget:
>>> import zope.component
>>> from zope.pagetemplate.interfaces import IPageTemplate
>>> from z3c.form.testing import getPath
>>> from z3c.form.widget import WidgetTemplateFactory
>>> zope.component.provideAdapter(
... WidgetTemplateFactory(getPath('password_input.pt'), 'text/html'),
... (None, None, None, None, interfaces.IPasswordWidget),
... IPageTemplate, name=interfaces.INPUT_MODE)
If we render the widget we get a simple input element:
>>> print(widget.render())
Even when we set a value on the widget, it is not displayed for security
reasons:
>>> widget.value = 'password'
>>> print(widget.render())
Adding some more attributes to the widget will make it display more:
>>> widget.style = u'color: blue'
>>> widget.placeholder = u'Confirm password'
>>> widget.autocapitalize = u'off'
>>> print(widget.render())
Let's now make sure that we can extract user entered data from a widget:
>>> widget.request = TestRequest(form={'widget.name': 'password'})
>>> widget.update()
>>> widget.extract()
'password'
If nothing is found in the request, the default is returned:
>>> widget.request = TestRequest()
>>> widget.update()
>>> widget.extract()