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# Mayavi traits ui example

An example of how to create an almost complete Mayavi UI inside a Traits UI view.

This does not use Envisage and provides a similar UI as seen in the full Mayavi application.

This example uses traitsUI to create a dialog mimicking the mayavi2 application: a scene on the right, and on the left a pipeline tree view, and below it a panel to edit the currently-selected object.

Source code: mayavi_traits_ui.py

    # Authors: Prabhu Ramachandran <prabhu [at] aero.iitb.ac.in>
    # Copyright (c) 2007, Enthought, Inc.
    # License: BSD Style.

    # Standard imports.
    from numpy import sqrt, sin, mgrid

    # Enthought imports.
    from enthought.traits.api import HasTraits, Instance, Property, Enum
    from enthought.traits.ui.api import View, Item, HSplit, VSplit, InstanceEditor
    from enthought.tvtk.pyface.scene_editor import SceneEditor
    from enthought.mayavi.core.ui.engine_view import EngineView
    from enthought.mayavi.tools.mlab_scene_model import MlabSceneModel

    ######################################################################
    class Mayavi(HasTraits):

        # The scene model.
        scene = Instance(MlabSceneModel, ())

        # The mayavi engine view.
        engine_view = Instance(EngineView)

        # The current selection in the engine tree view.
        current_selection = Property

        ######################
        view = View(HSplit(VSplit(Item(name='engine_view',
                                       style='custom',
                                       resizable=True,
                                       show_label=False
                                       ),
                                  Item(name='current_selection',
                                       editor=InstanceEditor(),
                                       enabled_when='current_selection is not None',
                                       style='custom',
                                       springy=True,
                                       show_label=False),
                                       ),
                                   Item(name='scene',
                                        editor=SceneEditor(),
                                        show_label=False,
                                        resizable=True,
                                        height=500,
                                        width=500),
                            ),
                    resizable=True,
                    scrollable=True
                    )

        def __init__(self, **traits):
            HasTraits.__init__(self, **traits)
            self.engine_view = EngineView(engine=self.scene.engine)

            # Hook up the current_selection to change when the one in the engine
            # changes.  This is probably unnecessary in Traits3 since you can show
            # the UI of a sub-object in T3.
            self.scene.engine.on_trait_change(self._selection_change,
                                              'current_selection')

            self.generate_data_mayavi()

        def generate_data_mayavi(self):
            """Shows how you can generate data using mayavi instead of mlab."""
            from enthought.mayavi.sources.api import ParametricSurface
            from enthought.mayavi.modules.api import Outline, Surface
            e = self.scene.engine
            s = ParametricSurface()
            e.add_source(s)
            e.add_module(Outline())
            e.add_module(Surface())

        def _selection_change(self, old, new):
            self.trait_property_changed('current_selection', old, new)

        def _get_current_selection(self):
            return self.scene.engine.current_selection

    if __name__ == '__main__':
        m = Mayavi()
        m.configure_traits()

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