/usr/lib/python2.7/dist-packages/IPython/html/widgets/widget_button.py is in ipython-notebook 2.3.0-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 | """ButtonWidget class.
Represents a button in the frontend using a widget. Allows user to listen for
click events on the button and trigger backend code when the clicks are fired.
"""
#-----------------------------------------------------------------------------
# Copyright (c) 2013, the IPython Development Team.
#
# Distributed under the terms of the Modified BSD License.
#
# The full license is in the file COPYING.txt, distributed with this software.
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# Imports
#-----------------------------------------------------------------------------
from .widget import DOMWidget, CallbackDispatcher
from IPython.utils.traitlets import Unicode, Bool
#-----------------------------------------------------------------------------
# Classes
#-----------------------------------------------------------------------------
class ButtonWidget(DOMWidget):
_view_name = Unicode('ButtonView', sync=True)
# Keys
description = Unicode('', help="Description of the button (label).", sync=True)
disabled = Bool(False, help="Enable or disable user changes.", sync=True)
def __init__(self, **kwargs):
"""Constructor"""
super(ButtonWidget, self).__init__(**kwargs)
self._click_handlers = CallbackDispatcher()
self.on_msg(self._handle_button_msg)
def on_click(self, callback, remove=False):
"""Register a callback to execute when the button is clicked.
The callback will be called with one argument,
the clicked button widget instance.
Parameters
----------
remove : bool (optional)
Set to true to remove the callback from the list of callbacks."""
self._click_handlers.register_callback(callback, remove=remove)
def _handle_button_msg(self, _, content):
"""Handle a msg from the front-end.
Parameters
----------
content: dict
Content of the msg."""
if content.get('event', '') == 'click':
self._click_handlers(self)
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