#-----------------------------------------------------------------------------
# Copyright (c) 2012 - 2019, Anaconda, Inc., and Bokeh Contributors.
# All rights reserved.
#
# The full license is in the file LICENSE.txt, distributed with this software.
#-----------------------------------------------------------------------------
''' Models for various kinds of arrow heads that can be added to
Arrow annotations.

'''

#-----------------------------------------------------------------------------
# Boilerplate
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from __future__ import absolute_import, division, print_function, unicode_literals

import logging
log = logging.getLogger(__name__)

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# Imports
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# Standard library imports

# External imports

# Bokeh imports
from ..core.has_props import abstract
from ..core.properties import Float, Include, Override
from ..core.property_mixins import FillProps, LineProps

from .annotations import Annotation

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# Globals and constants
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__all__ = (
    'ArrowHead',
    'NormalHead',
    'OpenHead',
    'TeeHead',
    'VeeHead',
)

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# General API
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@abstract
class ArrowHead(Annotation):
    ''' Base class for arrow heads.

    '''

class OpenHead(ArrowHead):
    ''' Render an open-body arrow head.

    '''

    size = Float(default=25, help="""
    The size, in pixels, of the arrow head.
    """)

    line_props = Include(LineProps, use_prefix=False, help="""
    The %s values for the arrow head outline.
    """)

class NormalHead(ArrowHead):
    ''' Render a closed-body arrow head.

    '''

    size = Float(default=25, help="""
    The size, in pixels, of the arrow head.
    """)

    line_props = Include(LineProps, use_prefix=False, help="""
    The %s values for the arrow head outline.
    """)

    fill_props = Include(FillProps, use_prefix=False, help="""
    The %s values for the arrow head interior.
    """)

    fill_color = Override(default="black")

class TeeHead(ArrowHead):
    ''' Render a tee-style arrow head.

    '''

    size = Float(default=25, help="""
    The size, in pixels, of the arrow head.
    """)

    line_props = Include(LineProps, use_prefix=False, help="""
    The %s values for the arrow head outline.
    """)

class VeeHead(ArrowHead):
    ''' Render a vee-style arrow head.

    '''

    size = Float(default=25, help="""
    The size, in pixels, of the arrow head.
    """)

    line_props = Include(LineProps, use_prefix=False, help="""
    The %s values for the arrow head outline.
    """)

    fill_props = Include(FillProps, use_prefix=False, help="""
    The %s values for the arrow head interior.
    """)

    fill_color = Override(default="black")

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# Dev API
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# Private API
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#-----------------------------------------------------------------------------
# Code
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