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.

To use this behavior, import the gaphas.segment module and add LineSegmentPainter to the list of painters for the view. Add segment_tool to the view as a controller, in order to activate the split/merge segment behavior for Line instances.

>>> from gaphas.view import GtkView
>>> from gaphas.painter import PainterChain, ItemPainter, HandlePainter
>>> from gaphas.tool import item_tool, scroll_tool, zoom_tool
>>> from gaphas.segment import LineSegmentPainter, segment_tool
>>> view = GtkView()
>>> view.painter = (
...     PainterChain()
...     .append(ItemPainter(view.selection))
...     .append(HandlePainter(view))
...     .append(LineSegmentPainter(view.selection))
... )
>>> view.add_controller(segment_tool(view))
>>> view.add_controller(item_tool(view))
>>> view.add_controller(scroll_tool(view))
>>> view.add_controller(zoom_tool(view))