43 lines
1.5 KiB
Python
43 lines
1.5 KiB
Python
"""
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"""
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import wx
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def AddEllipticalArc(self, x, y, w, h, startAngle, endAngle, clockwise = False):
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""" Draws an arc of an ellipse within bounding rect (x, y, w, h)
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from startArc to endArc (in radians, relative to the horizontal line of the eclipse)"""
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if True:
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import warnings
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warnings.warn("elliptical arcs are not supported")
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w = w/2.0
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h = h/2.0
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self.AddArc(x+w, y+h, ((w+h)/2), startAngle, endAngle, clockwise)
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return
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else:
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#implement in terms of AddArc by applying a transformation matrix
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#Sigh this can't work, still need to patch wx to allow
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#either a) AddPath that's not a closed path or
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#b) allow pushing and popping of states on a path, not just on a context
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#a) is possible in GDI+, need to investigate other renderers.
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#b) is possible in Quartz and Cairo, but not in GDI+. It could
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#possibly be simulated by combining the current transform with option a.
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mtx = wx.GraphicsRenderer_GetDefaultRenderer().CreateMatrix()
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path = wx.GraphicsRenderer_GetDefaultRenderer().CreatePath()
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mtx.Translate(x+(w/2.0), y+(h/2.0))
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mtx.Scale(w/2.0, y/2.0)
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path.AddArc(0, 0, 1, startAngle, endAngle, clockwise)
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path.Transform(mtx)
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self.AddPath(path)
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self.MoveToPoint(path.GetCurrentPoint())
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self.CloseSubpath()
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if not hasattr(wx.GraphicsPath, "AddEllipticalArc"):
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wx.GraphicsPath.AddEllipticalArc = AddEllipticalArc
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del AddEllipticalArc
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