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"""
"""
import math
import wx
from enable.savage.svg import svg_extras
def elliptical_arc_to(self, rx, ry, phi, large_arc_flag, sweep_flag, x2, y2):
x1, y1 = self.GetCurrentPoint()
arcs = svg_extras.elliptical_arc_to(self, rx, ry, phi,
large_arc_flag, sweep_flag,
x1, y1, x2, y2)
for arc in arcs:
path = wx.GraphicsRenderer_GetDefaultRenderer().CreatePath()
path.MoveToPoint(x1, y1)
path.AddCurveToPoint(*arc)
self.AddPath(path)
x1, y1 = self.GetCurrentPoint()
self.MoveToPoint(x1, y1)
self.CloseSubpath()
def AddEllipticalArc(self, x, y, width, height, theta, dtheta, clockwise=False):
""" Draws an arc of an ellipse within bounding rect (x,y,w,h)
from startArc to endArc (in degrees, relative to the horizontal line of the eclipse)"""
# compute the cubic bezier and add that to the path by calling AddCurveToPoint
sub_paths = svg_extras.bezier_arc(x, y, x+width, y+height, theta, dtheta)
for sub_path in sub_paths:
x1,y1, cx1, cy1, cx2, cy2, x2,y2 = sub_path
path = wx.GraphicsRenderer_GetDefaultRenderer().CreatePath()
path.MoveToPoint(x1, y1)
path.AddCurveToPoint(cx1, cy1, cx2, cy2, x2, y2)
self.AddPath(path)
self.MoveToPoint(path.GetCurrentPoint())
self.CloseSubpath()
if not hasattr(wx.GraphicsPath, "AddEllipticalArcTo"):
wx.GraphicsPath.AddEllipticalArcTo = AddEllipticalArc
wx.GraphicsPath.elliptical_arc_to = elliptical_arc_to
del AddEllipticalArc
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