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""" An action that sets the active perspective. """
# Enthought library imports.
from pyface.workbench.api import IPerspective
from traits.api import Delegate, Instance, on_trait_change
# Local imports.
from .workbench_action import WorkbenchAction
class SetActivePerspectiveAction(WorkbenchAction):
""" An action that sets the active perspective. """
#### 'Action' interface ###################################################
# Is the action enabled?
enabled = Delegate('perspective')
# The action's unique identifier (may be None).
id = Delegate('perspective')
# The action's name (displayed on menus/tool bar tools etc).
name = Delegate('perspective')
# The action's style.
style = 'radio'
#### 'SetActivePerspectiveAction' interface ###############################
# The perspective that we set the active perspective to.
perspective = Instance(IPerspective)
###########################################################################
# 'Action' interface.
###########################################################################
def destroy(self):
""" Destroy the action. """
self.window = None
return
def perform(self, event):
""" Perform the action. """
self.window.active_perspective = self.perspective
return
###########################################################################
# Private interface.
###########################################################################
@on_trait_change('perspective,window.active_perspective')
def _refresh_checked(self):
""" Refresh the checked state of the action. """
self.checked = self.perspective is not None \
and self.window is not None \
and self.window.active_perspective is not None \
and self.perspective.id is self.window.active_perspective.id
return
#### EOF ######################################################################
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