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Line Segments
#############
The line segment functionality is an add-on, that will allow the user to add line segments to a line, and merge them.
.. image:: images/segment.png
:align: center
To use this behavior, import the ``gaphas.segment`` module and add ``LineSegmentPainter`` to the list of painters for the view.
Splitting and merging of lines is supported by ``item_tool``, however
to actually use it, the ``segment`` module needs to be imported.
>>> from gaphas.view import GtkView
>>> from gaphas.painter import PainterChain, ItemPainter, HandlePainter
>>> from gaphas.tool import item_tool, zoom_tool
>>> from gaphas.segment import LineSegmentPainter
>>> view = GtkView()
>>> view.painter = (
... PainterChain()
... .append(ItemPainter(view.selection))
... .append(HandlePainter(view))
... .append(LineSegmentPainter(view.selection))
... )
>>> view.add_controller(item_tool())
>>> view.add_controller(zoom_tool())
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