103 lines
3.0 KiB
Python
103 lines
3.0 KiB
Python
# encoding: utf-8
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"""DrawingML objects related to line formatting."""
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from __future__ import absolute_import, division, print_function, unicode_literals
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from ..enum.dml import MSO_FILL
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from .fill import FillFormat
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from ..util import Emu, lazyproperty
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class LineFormat(object):
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"""Provides access to line properties such as color, style, and width.
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A LineFormat object is typically accessed via the ``.line`` property of
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a shape such as |Shape| or |Picture|.
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"""
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def __init__(self, parent):
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super(LineFormat, self).__init__()
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self._parent = parent
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@lazyproperty
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def color(self):
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"""
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The |ColorFormat| instance that provides access to the color settings
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for this line. Essentially a shortcut for ``line.fill.fore_color``.
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As a side-effect, accessing this property causes the line fill type
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to be set to ``MSO_FILL.SOLID``. If this sounds risky for your use
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case, use ``line.fill.type`` to non-destructively discover the
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existing fill type.
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"""
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if self.fill.type != MSO_FILL.SOLID:
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self.fill.solid()
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return self.fill.fore_color
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@property
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def dash_style(self):
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"""Return value indicating line style.
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Returns a member of :ref:`MsoLineDashStyle` indicating line style, or
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|None| if no explicit value has been set. When no explicit value has
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been set, the line dash style is inherited from the style hierarchy.
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Assigning |None| removes any existing explicitly-defined dash style.
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"""
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ln = self._ln
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if ln is None:
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return None
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return ln.prstDash_val
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@dash_style.setter
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def dash_style(self, dash_style):
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if dash_style is None:
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ln = self._ln
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if ln is None:
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return
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ln._remove_prstDash()
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ln._remove_custDash()
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return
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ln = self._get_or_add_ln()
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ln.prstDash_val = dash_style
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@lazyproperty
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def fill(self):
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"""
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|FillFormat| instance for this line, providing access to fill
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properties such as foreground color.
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"""
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ln = self._get_or_add_ln()
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return FillFormat.from_fill_parent(ln)
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@property
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def width(self):
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"""
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The width of the line expressed as an integer number of :ref:`English
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Metric Units <EMU>`. The returned value is an instance of |Length|,
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a value class having properties such as `.inches`, `.cm`, and `.pt`
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for converting the value into convenient units.
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"""
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ln = self._ln
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if ln is None:
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return Emu(0)
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return ln.w
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@width.setter
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def width(self, emu):
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if emu is None:
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emu = 0
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ln = self._get_or_add_ln()
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ln.w = emu
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def _get_or_add_ln(self):
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"""
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Return the ``<a:ln>`` element containing the line format properties
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in the XML.
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"""
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return self._parent.get_or_add_ln()
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@property
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def _ln(self):
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return self._parent.ln
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