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import gp, PlotItems, termdefs | import gp, PlotItems, termdefs |
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def test_mouse(): |
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"""Return whether mouse support is present or not. |
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The detection is done by calling gnuplot with a file containing only the |
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"set mouse" command. If gnuplot does have mouse support, it should simply |
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execute the file silently, producing no output.""" |
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import os,tempfile,commands |
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tmpname = tempfile.mktemp() |
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tfile = open(tmpname,"w") |
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tfile.write("set mouse") |
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tfile.close() |
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msg = commands.getoutput(gp.GnuplotOpts.gnuplot_command + " " + |
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tmpname) |
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os.unlink(tmpname) |
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if msg: # Gnuplot won"t print anything if it has mouse support |
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has_mouse = 0 |
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else: |
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has_mouse = 1 |
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return has_mouse |
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class _GnuplotFile: | class _GnuplotFile: |
"""A file to which gnuplot commands can be written. | """A file to which gnuplot commands can be written. |
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'output' : 'string', | 'output' : 'string', |
} | } |
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def __init__(self, filename=None, persist=None, debug=0): |
def __init__(self, filename=None, persist=None, debug=0, mouse=None): |
"""Create a Gnuplot object. | """Create a Gnuplot object. |
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Create a 'Gnuplot' object. By default, this starts a gnuplot | Create a 'Gnuplot' object. By default, this starts a gnuplot |
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'debug=1' -- echo the gnuplot commands to stderr as well as | 'debug=1' -- echo the gnuplot commands to stderr as well as |
sending them to gnuplot. | sending them to gnuplot. |
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"mouse=1" -- activate mouse support (officially available as of |
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gnuplot 4.0 under certain platforms). |
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""" | """ |
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# The mouse check must be done first, so we can decide whether to use |
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# inline data and fifos or not (they break mouse support) |
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if mouse is None: |
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mouse = test_mouse() |
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if mouse: |
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gp.GnuplotOpts.prefer_inline_data = 0 |
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gp.GnuplotOpts.prefer_fifo_data = 0 |
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if filename is None: | if filename is None: |
self.gnuplot = gp.GnuplotProcess(persist=persist) | self.gnuplot = gp.GnuplotProcess(persist=persist) |
else: | else: |
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'Gnuplot with output to file does not allow ' | 'Gnuplot with output to file does not allow ' |
'persist option.') | 'persist option.') |
self.gnuplot = _GnuplotFile(filename) | self.gnuplot = _GnuplotFile(filename) |
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self._clear_queue() | self._clear_queue() |
self.debug = debug | self.debug = debug |
self.plotcmd = 'plot' | self.plotcmd = 'plot' |
self('set terminal %s' % (gp.GnuplotOpts.default_term,)) |
# The "set mouse" command MUST be the VERY FIRST command passed to gnuplot |
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if mouse: |
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self("set mouse") |
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self("set terminal %s" % gp.GnuplotOpts.default_term) |
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def __call__(self, s): | def __call__(self, s): |
"""Send a command string to gnuplot. | """Send a command string to gnuplot. |
