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#------------------------------------------------------------------------------
# Copyright (c) 2013-2025, Nucleic Development Team.
#
# Distributed under the terms of the Modified BSD License.
#
# The full license is in the file LICENSE, distributed with this software.
#------------------------------------------------------------------------------
from atom.api import Typed
from enaml.widgets.stack_item import ProxyStackItem
from .QtWidgets import QFrame
from .q_single_widget_layout import QSingleWidgetLayout
from .qt_container import QtContainer
from .qt_widget import QtWidget
class QStackItem(QFrame):
""" A QFrame subclass which acts as an item QStack.
"""
def __init__(self, *args, **kwargs):
""" Initialize a QStackItem.
Parameters
----------
*args, **kwargs
The position and keyword arguments required to initialize
a QWidget.
"""
super(QStackItem, self).__init__(*args, **kwargs)
self._stack_widget = None
self.setLayout(QSingleWidgetLayout())
def stackWidget(self):
""" Get the stack widget for this stack item.
Returns
-------
result : QWidget or None
The stack widget being managed by this item.
"""
return self._stack_widget
def setStackWidget(self, widget):
""" Set the stack widget for this stack item.
Parameters
----------
widget : QWidget
The QWidget to use as the stack widget in this item.
"""
self._stack_widget = widget
self.layout().setWidget(widget)
class QtStackItem(QtWidget, ProxyStackItem):
""" A Qt implementation of an Enaml ProxyStackItem.
"""
#: A reference to the widget created by the proxy.
widget = Typed(QStackItem)
#--------------------------------------------------------------------------
# Initialization API
#--------------------------------------------------------------------------
def create_widget(self):
""" Create the underlying QStackItem widget.
"""
self.widget = QStackItem(self.parent_widget())
def init_layout(self):
""" Initialize the layout for the underlying widget.
"""
super(QtStackItem, self).init_layout()
self.widget.setStackWidget(self.stack_widget())
#--------------------------------------------------------------------------
# Utility Methods
#--------------------------------------------------------------------------
def stack_widget(self):
""" Find and return the stack widget child for this widget.
"""
d = self.declaration.stack_widget()
if d is not None:
return d.proxy.widget
#--------------------------------------------------------------------------
# Child Events
#--------------------------------------------------------------------------
def child_added(self, child):
""" Handle the child added event for a QtStackItem.
"""
super(QtStackItem, self).child_added(child)
if isinstance(child, QtContainer):
self.widget.setStackWidget(self.stack_widget())
def child_removed(self, child):
""" Handle the child added event for a QtStackItem.
"""
super(QtStackItem, self).child_removed(child)
if isinstance(child, QtContainer):
self.widget.setStackWidget(self.stack_widget())
#--------------------------------------------------------------------------
# Widget Update Methods
#--------------------------------------------------------------------------
def set_visible(self, visible):
""" An overridden visibility setter.
This setter disables changing visibility on the widget since
the visibility is controlled entirely by the parent stack.
"""
pass
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