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State - A package to keep track of plotting commands |
State - A package to keep track of plotting commands
use PDL::Graphics::State;
This is a very simple, at present almost trivial, package to keep track of the current set of plotting commands.
You create a new object by calling the new operator
$state = PDL::Graphics::State->new();
Then for each new command you call add on this object so that for a
call to line of the form
line $x, $y, $opt;
the call to add would be like
$state->add(\&line, 'line', [$x, $y], $opt);
which is stored internally as:
[\&line, 'line', [$x, $y], $opt]
The state can later be extracted using get which returns the state
object which is an array of anonymous arrays like the one above where
the first object is a reference to the function, the second an anomymous
array of arguments to the function and finally an anonymous hash with
options to the command.
If you know the order in which you inserted commands they can be removed
by calling remove with the number in the stack. No further interaction
is implmented except clear which clears the stack and copy which
returns a ``deep'' copy of the state.
Jarle Brinchmann (jarle@astro.ox.ac.uk) after some prodding by Karl Glazebrook.
All rights reserved. There is no warranty. You are allowed to redistribute this software / documentation under certain conditions. For details, see the file COPYING in the PDL distribution. If this file is separated from the PDL distribution, the copyright notice should be included in the file.
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State - A package to keep track of plotting commands |