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#------------------------------------------------------------------------------
# Copyright (c) 2007, Riverbank Computing Limited
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD license.
# However, when used with the GPL version of PyQt the additional terms described in the PyQt GPL exception also apply
#
# Author: Riverbank Computing Limited
#------------------------------------------------------------------------------
""" Creates a PyQt specific modal dialog user interface that runs as a
complete application, using information from the specified UI object.
"""
#-------------------------------------------------------------------------------
# Imports:
#-------------------------------------------------------------------------------
# Standard library imports.
import os
# System library imports.
from pyface.qt import QtGui
# ETS imports.
from pyface.util.guisupport import is_event_loop_running_qt4, \
start_event_loop_qt4
KEEP_ALIVE_UIS = set()
def on_ui_destroyed(object, name, old, destroyed):
""" Remove the UI object from KEEP_ALIVE_UIS.
"""
assert name == 'destroyed'
if destroyed:
assert object in KEEP_ALIVE_UIS
KEEP_ALIVE_UIS.remove(object)
object.on_trait_change(on_ui_destroyed, 'destroyed', remove=True)
#-------------------------------------------------------------------------------
# Creates a 'stand-alone' PyQt application to display a specified traits UI
# View:
#-------------------------------------------------------------------------------
def view_application ( context, view, kind, handler, id, scrollable, args ):
""" Creates a stand-alone PyQt application to display a specified traits UI
View.
Parameters
----------
context : object or dictionary
A single object or a dictionary of string/object pairs, whose trait
attributes are to be edited. If not specified, the current object is
used.
view : view object
A View object that defines a user interface for editing trait attribute
values.
kind : string
The type of user interface window to create. See the
**traitsui.view.kind_trait** trait for values and
their meanings. If *kind* is unspecified or None, the **kind**
attribute of the View object is used.
handler : Handler object
A handler object used for event handling in the dialog box. If
None, the default handler for Traits UI is used.
scrollable : Boolean
Indicates whether the dialog box should be scrollable. When set to
True, scroll bars appear on the dialog box if it is not large enough
to display all of the items in the view at one time.
"""
if (kind == 'panel') or ((kind is None) and (view.kind == 'panel')):
kind = 'modal'
app = QtGui.QApplication.instance()
if app is None or not is_event_loop_running_qt4(app):
return ViewApplication( context, view, kind, handler, id,
scrollable, args ).ui.result
ui = view.ui( context,
kind = kind,
handler = handler,
id = id,
scrollable = scrollable,
args = args )
# If the UI has not been closed yet, we need to keep a reference to
# it until it does close.
if not ui.destroyed:
KEEP_ALIVE_UIS.add(ui)
ui.on_trait_change(on_ui_destroyed, 'destroyed')
return ui.result
#-------------------------------------------------------------------------------
# 'ViewApplication' class:
#-------------------------------------------------------------------------------
class ViewApplication ( object ):
""" Modal window that contains a stand-alone application.
"""
#---------------------------------------------------------------------------
# Initializes the object:
#---------------------------------------------------------------------------
def __init__ ( self, context, view, kind, handler, id, scrollable, args ):
""" Initializes the object.
"""
self.context = context
self.view = view
self.kind = kind
self.handler = handler
self.id = id
self.scrollable = scrollable
self.args = args
# FIXME: fbi is wx specific at the moment.
if os.environ.get( 'ENABLE_FBI' ) is not None:
try:
from etsdevtools.developer.helper.fbi import enable_fbi
enable_fbi()
except:
pass
self.ui = self.view.ui( self.context,
kind = self.kind,
handler = self.handler,
id = self.id,
scrollable = self.scrollable,
args = self.args )
start_event_loop_qt4()
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