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#------------------------------------------------------------------------------
# Copyright (c) 2008, 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
# Description: <Enthought pyface package component>
#------------------------------------------------------------------------------
""" A page in a wizard. """
# Major package imports.
from pyface.qt import QtCore, QtGui
# Enthought library imports.
from traits.api import Bool, HasTraits, provides, Str, Tuple, Unicode
from pyface.wizard.i_wizard_page import IWizardPage, MWizardPage
@provides(IWizardPage)
class WizardPage(MWizardPage, HasTraits):
""" The toolkit specific implementation of a WizardPage.
See the IWizardPage interface for the API documentation.
"""
#### 'IWizardPage' interface ##############################################
id = Str
next_id = Str
last_page = Bool(False)
complete = Bool(False)
heading = Unicode
subheading = Unicode
size = Tuple
###########################################################################
# 'IWizardPage' interface.
###########################################################################
def create_page(self, parent):
""" Creates the wizard page. """
content = self._create_page_content(parent)
# We allow some flexibility with the sort of control we are given.
if not isinstance(content, QtGui.QWizardPage):
wp = _WizardPage(self)
if isinstance(content, QtGui.QLayout):
wp.setLayout(content)
else:
assert isinstance(content, QtGui.QWidget)
lay = QtGui.QVBoxLayout()
lay.addWidget(content)
wp.setLayout(lay)
content = wp
# Honour any requested page size.
if self.size:
width, height = self.size
if width > 0:
content.setMinimumWidth(width)
if height > 0:
content.setMinimumHeight(height)
content.setTitle(self.heading)
content.setSubTitle(self.subheading)
return content
###########################################################################
# Protected 'IWizardPage' interface.
###########################################################################
def _create_page_content(self, parent):
""" Creates the actual page content. """
# Dummy implementation - override!
control = QtGui.QWidget(parent)
palette = control.palette()
palette.setColor(QtGui.QPalette.Window, QtGui.QColor('yellow'))
control.setPalette(palette)
control.setAutoFillBackground(True)
return control
class _WizardPage(QtGui.QWizardPage):
""" A QWizardPage sub-class that hooks into the IWizardPage's 'complete'
trait. """
def __init__(self, page):
""" Initialise the object. """
QtGui.QWizardPage.__init__(self)
self.pyface_wizard = None
page.on_trait_change(self._on_complete_changed, 'complete')
self._page = page
def initializePage(self):
""" Reimplemented to call the IWizard's 'next'. """
if self.pyface_wizard is not None:
self.pyface_wizard.next()
def cleanupPage(self):
""" Reimplemented to call the IWizard's 'previous'. """
if self.pyface_wizard is not None:
self.pyface_wizard.previous()
def isComplete(self):
""" Reimplemented to return the state of the 'complete' trait. """
return self._page.complete
def _on_complete_changed(self):
""" The trait handler for when the page's completion state changes. """
self.completeChanged.emit()
#### EOF ######################################################################
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