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# Standalone example

A simple example of how you can use Mayavi without using Envisage or the Mayavi Envisage application.

Source code: standalone.py

    # Author: Prabhu Ramachandran <prabhu@aero.iitb.ac.in>
    # Copyright (c) 2007, Enthought, Inc.
    # License: BSD Style.

    from os.path import join, abspath

    from enthought.pyface.api import GUI
    # The core Engine.
    from enthought.mayavi.core.api import Engine
    from enthought.mayavi.core.ui.engine_view import EngineView
    # Usual MayaVi imports
    from enthought.mayavi.scripts.util import get_data_dir
    from enthought.mayavi.sources.api import VTKXMLFileReader
    from enthought.mayavi.modules.api import Outline, ScalarCutPlane, Streamline

    def main():
        # Create the MayaVi engine and start it.
        e = Engine()
        # Starting the engine registers the engine with the registry and
        # notifies others that the engine is ready.
        e.start()

        # Do this if you need to see the MayaVi tree view UI.
        ev = EngineView(engine=e)
        ui = ev.edit_traits()

        # Create a new scene.
        scene = e.new_scene()
        # Now create a new scene just for kicks.
        scene1 = e.new_scene()

        # Now setup a normal MayaVi pipeline.
        src = VTKXMLFileReader()
        src.initialize(join(get_data_dir(abspath(__file__)),
                            'fire_ug.vtu'))
        e.add_source(src)
        e.add_module(Outline())
        e.add_module(ScalarCutPlane())
        e.add_module(Streamline())
        return e, ui

    if __name__ == '__main__':
        # When main returns the ui to go out of scope and be gc'd causing the view
        # to disappear with qt4.
        e, ui = main()
        # Create a GUI instance and start the event loop.  We do this here so that
        # main can be run from IPython -wthread if needed.
        gui = GUI()
        gui.start_event_loop()

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