How to use the pyface.api.ImageResource function in pyface

from pyface.workbench.api import TraitsUIView
from traits.api import Button, Instance, List, Property, Str, \
    cached_property, on_trait_change
from traitsui.api import View, Group, Item, CodeEditor, \
    TabularEditor, spring
from traitsui.tabular_adapter import TabularAdapter

# Local imports
from traits.logger.agent.quality_agent_view import QualityAgentView
from traits.logger.plugin import view
from traits.logger.plugin.logger_service import LoggerService

# Constants
_IMAGE_MAP = { logging.DEBUG: ImageResource('debug'),
               logging.INFO: ImageResource('info'),
               logging.WARNING: ImageResource('warning'),
               logging.ERROR: ImageResource('error'),
               logging.CRITICAL: ImageResource('crit_error') }


class LogRecordAdapter(TabularAdapter):
    """ A TabularEditor adapter for logging.LogRecord objects.
    """

    columns = [ ('Level', 'level'), ('Date', 'date'), ('Time', 'time'),
                ('Message', 'message') ]
    column_widths = [ 80, 100, 120, -1 ]

    level_image = Property
    level_text = Property(Str)
    date_text = Property(Str)
    time_text = Property(Str)

search_path = [self._get_image_path()],
                        ),
                    tooltip = "View along the +Z axis",
                    on_perform = self.z_plus_view,
                    ),
                Action(
                    image = ImageResource('16x16/isometric',
                        search_path = [self._get_image_path()],
                        ),
                    tooltip = "Obtain an isometric view",
                    on_perform = self.isometric_view,
                    ),
                ),
            Group(
                Action(
                    image = ImageResource('16x16/parallel',
                        search_path = [self._get_image_path()],
                        ),
                    tooltip = 'Toggle parallel projection',
                    style="toggle",
                    on_perform = self._toggle_projection,
                    checked = self.parallel_projection,
                    ),
                Action(
                    image = ImageResource('16x16/origin_glyph',
                        search_path = [self._get_image_path()],
                        ),
                    tooltip = 'Toggle axes indicator',
                    style="toggle",
                    enabled=(self.marker is not None),
                    on_perform = self._toggle_axes,
                    checked = self.show_axes,

# Turn this off if you don't want the workbench to start a GUI
    # event loop.
    start_gui_event_loop = Bool(True, desc='start a GUI event loop')

    #### 'IApplication' interface #############################################

    # The application's globally unique Id.
    id = 'mayavi_e3'

    #### 'WorkbenchApplication' interface #####################################

    # Branding information.
    #
    # The icon used on window title bars etc.
    icon = ImageResource('m2.ico', search_path=[IMG_DIR])

    # The name of the application (also used on window title bars etc).
    name = 'Mayavi2 - The 3D data visualizer'

    ###########################################################################
    # 'WorkbenchApplication' interface.
    ###########################################################################
    def run(self):
        """ Run the application.

        This does the following:

        1) Starts the application
        2) Creates and opens a workbench window
        3) Starts the GUI event loop (only if start_gui_event_loop is
           True)

tooltip = "Obtain an isometric view",
                    on_perform = self.isometric_view,
                    ),
                ),
            Group(
                Action(
                    image = ImageResource('16x16/parallel',
                        search_path = [self._get_image_path()],
                        ),
                    tooltip = 'Toggle parallel projection',
                    style="toggle",
                    on_perform = self._toggle_projection,
                    checked = self.parallel_projection,
                    ),
                Action(
                    image = ImageResource('16x16/origin_glyph',
                        search_path = [self._get_image_path()],
                        ),
                    tooltip = 'Toggle axes indicator',
                    style="toggle",
                    enabled=(self.marker is not None),
                    on_perform = self._toggle_axes,
                    checked = self.show_axes,
                    ),
                Action(
                    image = ImageResource('16x16/fullscreen',
                        search_path = [self._get_image_path()],
                        ),
                    tooltip = 'Full Screen (press "q" or "e" or ESC to exit fullscreen)',
                    style="push",
                    on_perform = self._full_screen_fired,
                    ),

# Task interface -------------------------------------------------------

    id = "example.second_task"
    name = "Second Multi-Tab Editor"

    tool_bars = [
        SToolBar(
            TaskAction(
                method="new",
                tooltip="New file",
                image=ImageResource("document_new"),
            ),
            TaskAction(
                method="new",
                tooltip="New file",
                image=ImageResource("document_new"),
            ),
            image_size=(32, 32),
        )
    ]

    # ------------------------------------------------------------------------
    # 'Task' interface.
    # ------------------------------------------------------------------------

    def _default_layout_default(self):
        return TaskLayout(
            left=VSplitter(
                HSplitter(PaneItem("steps.pane1"), PaneItem("steps.pane2"))
            )
        )

def get_actions_Menu_Help_DebugGroup(self):
        return [
            SMenu(TaskAction(name='Dynamic Menu Names', method='debug',
                             tooltip='Do some debug stuff',
                             image=ImageResource('debug')),
                  WidgetInspectorAction(),
                  id="Debug", name="Debug"),
            ]

SMenu(
            TaskAction(name="New", method="new", accelerator="Ctrl+N"),
            id="File",
            name="&File",
        ),
        SMenu(
            DockPaneToggleGroup(), TaskToggleGroup(), id="View", name="&View"
        ),
    )

    tool_bars = [
        SToolBar(
            TaskAction(
                method="new",
                tooltip="New file",
                image=ImageResource("document_new"),
            ),
            image_size=(32, 32),
        )
    ]

    # ------------------------------------------------------------------------
    # 'Task' interface.
    # ------------------------------------------------------------------------

    def _default_layout_default(self):
        return TaskLayout(
            top=Tabbed(
                PaneItem("steps.first_pane"),
                PaneItem("steps.second_pane"),
                PaneItem("steps.third_pane"),
            )

"<p>"]
        
        ver_text = ["{0} {1}".format(key, value) for key, value in versions.items()]
        
        text.extend(ver_text)
        
        text.extend(["Icons from the <a href="http://tango.freedesktop.org">Tango Desktop Project</a>",
                "<a href="https://thenounproject.com/search/?q=setup&amp;i=14287">Settings icon</a> by Paulo Sa Ferreira from <a href="https://thenounproject.com">The Noun Project</a>",
                "<a href="https://thenounproject.com/search/?q=processing&amp;i=849831">Processing icon</a> by Gregor Cresnar from <a href="https://thenounproject.com">The Noun Project</a>",
                "<a href="http://www.freepik.com/free-photos-vectors/background">App icon from Starline - Freepik.com</a>",
                "Cuvette image from Wikimedia Commons user <a href="http://commons.wikimedia.org/wiki/File:Hellma_Large_cone_cytometry_cell.JPG">HellmaUSA</a>"])
        
        dialog = AboutDialog(text = text,
                             parent = self.window.control,
                             title = "About",
                             image = ImageResource('cuvette'),
                             additions = text)
        dialog.open()
        </p>

preprocessing = Button('Preprocessing')
    segmentation = Button('Segmentation')
    parcellation = Button('Parcellation')
    diffusion = Button('Diffusion')
    registration = Button('Registration')
    connectome = Button('Connectome')
   
    config_file = Str
   
    pipeline_group = VGroup(
                        HGroup(spring,Item('preprocessing',editor=ThemedButtonEditor(image=ImageResource('preprocessing'),theme='@G')),spring,show_labels=False),
                        HGroup(spring,Item('segmentation',editor=ThemedButtonEditor(image=ImageResource('segmentation'),theme='@G')),spring,show_labels=False),#Item('parcellation',editor=ThemedButtonEditor(image=ImageResource('parcellation'),theme='@G')),show_labels=False),
                        HGroup(spring,Item('parcellation',editor=ThemedButtonEditor(image=ImageResource('parcellation'),theme='@G')),spring,show_labels=False),
                        HGroup(spring,Item('registration',editor=ThemedButtonEditor(image=ImageResource('registration'),theme='@G')),spring,show_labels=False),
                        HGroup(spring,Item('diffusion',editor=ThemedButtonEditor(image=ImageResource('diffusion'),theme='@G')),spring,show_labels=False),
                        HGroup(spring,Item('connectome',editor=ThemedButtonEditor(image=ImageResource('connectome'),theme='@G')),spring,show_labels=False),
                        springy=True
                        )
    
    def __init__(self,project_info):
        self.stages = {'Preprocessing':PreprocessingStage(),
        'Segmentation':SegmentationStage(),
            'Parcellation':ParcellationStage(pipeline_mode = "Diffusion"),
            'Registration':RegistrationStage(pipeline_mode = "Diffusion"),
            'Diffusion':DiffusionStage(),
            'Connectome':ConnectomeStage()}
        
        Pipeline.__init__(self, project_info)
        
        self.stages['Segmentation'].config.on_trait_change(self.update_parcellation,'seg_tool')
        self.stages['Parcellation'].config.on_trait_change(self.update_segmentation,'parcellation_scheme')

# class attribute

    activated_task_ids = set()

    #### 'IAbout' interface ###################################################

    about_title = Unicode('Omnivore XL')

    about_version = Unicode

    about_description = Unicode('Byte into the meat of 8-bit Software!\n\nSend feedback to: feedback@playermissile.com')

    about_website = Str('http://playermissile.com/omnivore')

    about_image = Instance(ImageResource, ImageResource('omnivore256'))

    #### 'IErrorReporter' interface ###########################################

    error_email_from = Str

    error_email_passwd = Str

    error_email_to = Str

    # Regular ol' class attributes here

    # description of menus
    ui_layout_description = {
        "menu": {
            "order": ["File", "Edit", "View", "Documents", "Window", "Help"],
            "File": ["NewGroup", "OpenGroup", "ImportGroup", "SaveGroup", "RevertGroup", "PrintGroup", "ExportGroup", "ExitGroup"],