# This file is part of the Printrun suite.
#
# Printrun is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Printrun is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Printrun.  If not, see <http://www.gnu.org/licenses/>.

"""

"""

import wx

def AddEllipticalArc(self, x, y, w, h, startAngle, endAngle, clockwise = False):
    """ Draws an arc of an ellipse within bounding rect (x, y, w, h)
    from startArc to endArc (in radians, relative to the horizontal line of the eclipse)"""

    if True:
        import warnings
        warnings.warn("elliptical arcs are not supported")
        w = w/2.0
        h = h/2.0
        self.AddArc(x+w, y+h, ((w+h)/2), startAngle, endAngle, clockwise)
        return
    else:
        #implement in terms of AddArc by applying a transformation matrix
        #Sigh this can't work, still need to patch wx to allow
        #either a) AddPath that's not a closed path or
        #b) allow pushing and popping of states on a path, not just on a context
        #a) is possible in GDI+, need to investigate other renderers.
        #b) is possible in Quartz and Cairo, but not in GDI+. It could
        #possibly be simulated by combining the current transform with option a.
        mtx = wx.GraphicsRenderer_GetDefaultRenderer().CreateMatrix()
        path = wx.GraphicsRenderer_GetDefaultRenderer().CreatePath()


        mtx.Translate(x+(w/2.0), y+(h/2.0))
        mtx.Scale(w/2.0, y/2.0)

        path.AddArc(0, 0, 1, startAngle, endAngle, clockwise)
        path.Transform(mtx)
        self.AddPath(path)
        self.MoveToPoint(path.GetCurrentPoint())
        self.CloseSubpath()

if not hasattr(wx.GraphicsPath, "AddEllipticalArc"):
    wx.GraphicsPath.AddEllipticalArc = AddEllipticalArc

del AddEllipticalArc