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# Copyright 2008 Nanorex, Inc. See LICENSE file for details.
"""
exprs.Arrow.py
@author: Ninad
@copyright: 2008 Nanorex, Inc. See LICENSE file for details.
@version:$Id$
History:
2008-03-02: Created
"""
from exprs.widget2d import Widget2D
from exprs.attr_decl_macros import ArgOrOption
from exprs.attr_decl_macros import Option
from exprs.ExprsConstants import Color, Position, ORIGIN, DX
from utilities.constants import gray
from exprs.__Symbols__ import Anything
from graphics.drawing.CS_draw_primitives import drawDirectionArrow
class Arrow(Widget2D):
"""
Arrow class provides a 3D arrow with a 'tail' and an arrow head.
@see: B{DnaSegment_ResizeHandle} where this is used to draw a resize handle
while editing a DnaSegment.
@see: exprs.Rect.py which defines some other 3 D objects.
@see: DirectionArrow.py -- Don't confuse it with this class.
"""
color = ArgOrOption(Color, gray)
tailPoint = ArgOrOption(Position, ORIGIN)
arrowBasePoint = ArgOrOption(Position, ORIGIN + 2*DX)
scale = ArgOrOption(float, 10.0)
tailRadius = ArgOrOption(float, 0.4)
#tailRadiusLimits ensure a min and max size for the arrow (including arrow
#tail and arrow head. drawDirectionArrow method uses tailRadius as a reference
#to derive other params such as arrowhead base radius etc. Thats why this arg
#is named this way.
#@See DnaSegment_ResizeHandle to see how these limits are defined.
tailRadiusLimits = ArgOrOption(tuple, ())
glpane = ArgOrOption(Anything, None)
scale_to_glpane = Option(bool, False)
def draw(self):
drawDirectionArrow(
self.color,
self.tailPoint,
self.arrowBasePoint,
self.tailRadius,
self.scale,
tailRadiusLimits = self.tailRadiusLimits,
numberOfSides = 6,
glpane = self.glpane,
scale_to_glpane = self.scale_to_glpane
)
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