==============
TextAreaWidget
==============
The widget can render a text area field for a text:
>>> from zope.interface.verify import verifyClass
>>> from z3c.form import interfaces
>>> from z3c.form.browser import textarea
The ``TextAreaWidget`` is a widget:
>>> verifyClass(interfaces.IWidget, textarea.TextAreaWidget)
True
The widget can render a input field only by adapting a request:
>>> from z3c.form.testing import TestRequest
>>> request = TestRequest()
>>> widget = textarea.TextAreaWidget(request)
Such a field provides IWidget:
>>> interfaces.IWidget.providedBy(widget)
True
We also need to register the template for at least the widget and request:
>>> import os.path
>>> import zope.interface
>>> from zope.publisher.interfaces.browser import IDefaultBrowserLayer
>>> from zope.pagetemplate.interfaces import IPageTemplate
>>> import z3c.form.browser
>>> import z3c.form.widget
>>> template = os.path.join(os.path.dirname(z3c.form.browser.__file__),
... 'textarea_input.pt')
>>> factory = z3c.form.widget.WidgetTemplateFactory(template)
>>> zope.component.provideAdapter(factory,
... (zope.interface.Interface, IDefaultBrowserLayer, None, None, None),
... IPageTemplate, name='input')
If we render the widget we get the HTML:
>>> print(widget.render())
Adding some more attributes to the widget will make it display more:
>>> widget.id = 'id'
>>> widget.name = 'name'
>>> widget.value = u'value'
>>> print(widget.render())
Check DISPLAY_MODE:
>>> template = os.path.join(os.path.dirname(z3c.form.browser.__file__),
... 'textarea_display.pt')
>>> factory = z3c.form.widget.WidgetTemplateFactory(template)
>>> zope.component.provideAdapter(factory,
... (zope.interface.Interface, IDefaultBrowserLayer, None, None, None),
... IPageTemplate, name='display')
>>> widget.value = u'foobar'
>>> widget.mode = interfaces.DISPLAY_MODE
>>> print(widget.render())
foobar
Check HIDDEN_MODE:
>>> template = os.path.join(os.path.dirname(z3c.form.browser.__file__),
... 'textarea_hidden.pt')
>>> factory = z3c.form.widget.WidgetTemplateFactory(template)
>>> zope.component.provideAdapter(factory,
... (zope.interface.Interface, IDefaultBrowserLayer, None, None, None),
... IPageTemplate, name='hidden')
>>> widget.value = u'foobar'
>>> widget.mode = interfaces.HIDDEN_MODE
>>> print(widget.render())