82 lines
2.4 KiB
ReStructuredText
82 lines
2.4 KiB
ReStructuredText
.. -*- Mode: rst -*-
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5. Make a script runnable through |cgt|
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=======================================
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To use your script you may run it directly like any other |Python| script.
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But, for debugging purpose it may be helpful to run it through the
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interactive layout viewer |cgt|.
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For |cgt| to be able to run your script, you must add to your script
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file a function named :cb:`ScriptMain()`, which takes a dictionary
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as sole argument (:cb:`**kw`). The ``kw`` dictionary contains, in
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particular, the CellViewer_ object we are running under with the
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keyword ``editor``. You can then load your cell into the viewer
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using the menu:
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* :fboxtt:`Tools` |rightarrow| :fboxtt:`Python Script`. The script
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file name must be given without the ``.py`` extension.
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.. note:: If you use breakpoints and want to see the progress of your
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script in the viewer, do not use the ``--script`` option of
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|cgt|.
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.. code-block:: console
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ego@home:~> cgt -V --script=invertor
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Because the script is run **before** the viewer is launched,
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you will only see the end result of your script.
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.. code-block:: Python
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def buildInvertor ( editor ):
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UpdateSession.open()
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cell = AllianceFramework.get().createCell( 'invertor' )
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cell.setTerminal( True )
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cell.setAbutmentBox( Box( toDbU(0.0), toDbU(0.0), toDbU(15.0), toDbU(50.0) ) )
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if editor:
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UpdateSession.close()
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editor.setCell( cell )
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editor.fit()
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UpdateSession.open()
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# The rest of the script...
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return
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def ScriptMain ( **kw ):
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editor = None
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if kw.has_key('editor') and kw['editor']:
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editor = kw['editor']
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buildInvertor( editor )
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return True
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5.1 Using Breakpoints
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~~~~~~~~~~~~~~~~~~~~~
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It is possible to add breakpoints inside a script by calling the ``Breakpoint.stop()``
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function. To be able to see exactly what has just been mofied, we must close the
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UpdateSession_ just before calling the breakpoint and reopen it just after.
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The ``Breakpoint.stop()`` function takes two arguments:
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#. The ``level`` above which it will be active.
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#. An informative message about the purpose of the breakpoint.
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We can create a little function to ease the work:
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.. code-block:: Python
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def doBreak ( level, message ):
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UpdateSession.close()
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Breakpoint.stop( level, message )
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UpdateSession.open()
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