''' Models for various kinds of arrow heads that can be added to
Arrow annotations.

'''
from __future__ import absolute_import

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

from .annotations import Annotation

@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")