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# (C) Copyright 2005-2023 Enthought, Inc., Austin, TX
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD
# license included in LICENSE.txt and may be redistributed only under
# the conditions described in the aforementioned license. The license
# is also available online at http://www.enthought.com/licenses/BSD.txt
#
# Thanks for using Enthought open source!
""" Base class defining common code for EnamlTaskPane and EnamlEditor. """
from traits.api import HasTraits, Instance
class EnamlPane(HasTraits):
""" Base class defining common code for EnamlTaskPane and EnamlEditor. """
# ------------------------------------------------------------------------
# 'EnamlPane' interface
# ------------------------------------------------------------------------
#: The Enaml component defining the contents of the TaskPane.
component = Instance("enaml.widgets.toolkit_object.ToolkitObject")
def create_component(self):
""" Return an Enaml component defining the contents of the pane.
Returns
-------
component : ToolkitObject
"""
raise NotImplementedError()
# ------------------------------------------------------------------------
# 'TaskPane'/'Editor' interface
# ------------------------------------------------------------------------
def create(self, parent):
""" Create the toolkit-specific control that represents the editor. """
from enaml.widgets.constraints_widget import ProxyConstraintsWidget
self.component = self.create_component()
# We start with an invisible component to avoid flicker. We restore the
# initial state after the Qt control is parented.
visible = self.component.visible
self.component.visible = False
# Initialize the proxy.
self.component.initialize()
# Activate the proxy.
if not self.component.proxy_is_active:
self.component.activate_proxy()
# Fish the Qt control out of the proxy. That's our TaskPane content.
self.control = self.component.proxy.widget
# Set the parent
if parent is not None:
self.control.setParent(parent)
# Restore the visibility state
self.component.visible = visible
if isinstance(self.component, ProxyConstraintsWidget):
self.component.proxy.request_relayout()
def destroy(self):
""" Destroy the toolkit-specific control that represents the editor.
"""
control = self.control
if control is not None:
control.hide()
self.component.destroy()
control.deleteLater()
self.control = None
self.component = None
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