Guides are a tool to align elements with one another.
Guides consist of a couple of elements: aspects that hook into the item-drag cycle, and a dedicated painter.
>>> from gaphas.view import GtkView >>> from gaphas.painter import PainterChain, ItemPainter, HandlePainter >>> from gaphas.tool import item_tool, scroll_tool, zoom_tool >>> from gaphas.guide import GuidePainter >>> view = GtkView() >>> view.painter = ( ... PainterChain() ... .append(ItemPainter(view.selection)) ... .append(HandlePainter(view)) ... .append(GuidePainter(view)) ... ) >>> view.add_controller(item_tool(view)) >>> view.add_controller(scroll_tool(view)) >>> view.add_controller(zoom_tool(view))
You need to hook up the GuidePainter. The aspect are loaded as soon as the module is loaded.