.. _release-0-12-3:

0.12.3
======

Bokeh Version ``0.12.3`` (Oct 2016) is a minor, incremental update that adds
a few new small features and fixes several bugs. Some of the highlights include:

* BokehJS reduced in size by nearly twenty percent
* New Categorical color mapper
* Tap tool and tooltips working for VBar and HBar
* Better hover tool support for some Charts
* Auto-generate legends from data in a column
* Many small bugfixes

.. _release-0-12-3-migration:

`Migration Guide <releases.html#release-0-12-3-migration>`__
------------------------------------------------------------

As the project approaches a 1.0 release, it is necessary to make some changes
to bring interfaces and functionality up to a point that can be maintained
long-term. We try to limit such changes as much as possible, and have a
period of deprecation.

Specifying Font Sizes
'''''''''''''''''''''

Setting text font size properties directly as strings (e.g. ``font_size="13px"``)
has been UN-DEPRECATED. This usage will continue to work, without any further
deprecation warning. (https://github.com/bokeh/bokeh/pull/5274)


output_server
'''''''''''''

The ``output_server`` function is deprecated and will be removed in the near
future. Use ``bokeh.client`` functions such as ``push_session`` instead.
(https://github.com/bokeh/bokeh/pull/5225)

Glyph Methods and Data Sources
''''''''''''''''''''''''''''''

It is now deprecated to supply both sequence literals and an explicit source
to glyph methods. For example:

.. code-block:: python

    p.circle([1,2,3], y='foo', source=source)  # BAD

Either provide only sequence literals, e.g:

.. code-block:: python

    p.circle([1,2,3], y=[4,5,6])

or put all data into the explicitly provided source, e.g:

.. code-block:: python

    p.circle(x='foo, y='foo', source=source)

The older usage will continue to function for some time with a deprecation
warning, and will result in an error in a future release.
(https://github.com/bokeh/bokeh/pull/5187)

FuncTickFormatter
'''''''''''''''''

`FuncTickFormatter` instances using JavaScript or CoffeeScript now require
code snippets (i.e., function bodies) instead of full function definitions.
Additionally, these formatters now accept Bokeh models as arguments so that
the models can be readily available to the formatter function code.
(https://github.com/bokeh/bokeh/pull/4659/files)

Legend
''''''

Several legend properties had duplicative ``legend_`` prefixes. The following
property names have been changed:

================== =================
old property name  new property name
================== =================
``legend_margin``  ``margin``
``legend_padding`` ``padding``
``legend_spacing`` ``spacing``
================== =================

The old property names will continue to work for some time with a deprecation
warning.

Additionally, the ``legends`` property of Legend has been renamed to ``items``,
and given a new type. The new type now accepts a list of ``LegendItem models``,
instead of a list of tuples. The previous format is still accepted for
convenience and compatibility and values are converted automatically. The
``legends`` property  will also continue to work for some time with a
deprecation warning.(https://github.com/bokeh/bokeh/pull/5229)

Dimensions
''''''''''

Specifying dimensions for tools has changed. The ``'x'`` and ``'y'`` aliases
for ``'width'`` and ``'height'`` have been **immediately removed**.
Additionally, instead of ``List(Enum(Dimension)``, dimensions are now specified
more simply as ``Enum(Dimension)`` with valid values ``"width"``, ``"height"``,
and ``"both"``. The previous format will continue to work for some time and be
converted automatically with a deprecation warning.
(https://github.com/bokeh/bokeh/pull/5225)


BokehJS Notes
'''''''''''''

* The BokehJS codebase organization has been cleaned up. The file
  ``common/hittest.coffee`` has been moved to ``core/hittest.coffee``. Other
  files that are unlikely to be used directly by users have also been moved.
  (https://github.com/bokeh/bokeh/pull/5266)


* The BokehJS class ``GlyphView`` no longer inherits from ``Renderer.View``,
  it now subclasses ``BokehView``. (https://github.com/bokeh/bokeh/pull/5189)


* The BokehJS palettes are now only available in the ``bokeh-api.js`` bundle,
  and not in ``bokeh.[min].js`` (https://github.com/bokeh/bokeh/pull/5183)


* The BokehJS bundle ``bokeh-compiler.js`` has been removed completely. All
  Coffeescript code (for extension modules, etc.) is now pre-compiled by the
  Bokeh Python library. (https://github.com/bokeh/bokeh/pull/4946)
