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  • Committer: Dainius Malachovskis
  • Date: 2009-06-11 21:01:55 UTC
  • mfrom: (1235.2.5 server)
  • Revision ID: dainius.malachovskis@sandas.eu-20090611210155-ql9k1pd0dnr9avr0
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bin/pychart/gs_frontend.py
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import os.path
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import pscanvas
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import tempfile
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import string
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import basecanvas
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from scaling import *
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def get_gs_path():
 
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def _get_gs_path():
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    """Guess where the Ghostscript executable is
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    and return its absolute path name."""
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    path = os.defpath
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    if os.environ.has_key("PATH"):
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        path = os.environ["PATH"]
 
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    path = os.environ.get("PATH", os.defpath)
 
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    for dir in path.split(os.pathsep):
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        for name in ("gs", "gs.exe", "gswin32c.exe"):
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            g = os.path.join(dir, name)
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            if os.path.exists(g):
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                return g
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    raise Exception, "Ghostscript not found."
 
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    raise Exception, "Ghostscript not found. path=%s" % str(path)
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class T(pscanvas.T):
 
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    """This class is a special kind of canvas that runs ghostscript
 
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    on the generated postscript contents. It is not used stand-alone, but as
 
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    a component of PNG and X11 display functionality."""
 
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    def __write_contents(self, fp):
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        fp.write(pscanvas.preamble_text)
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        for name, id in self.__font_ids.items():
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                                               xscale(self.__xmax),
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                                               yscale(self.__ymax)])
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        gs_path = get_gs_path()
 
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        gs_path = _get_gs_path()
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        self.pipe_fp = None
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        if self.__output_lines == []:
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            return