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#------------------------------------------------------------------------------
# Copyright (c) 2005, Enthought, Inc.
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD
# license included in enthought/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!
#
# Author: David C. Morrill
# Date: 12/02/2004
# Description: Create a modal Tkinter user interface for a specified UI object.
#
# Symbols defined: ui_modal
#
#------------------------------------------------------------------------------
#-------------------------------------------------------------------------------
# Imports:
#-------------------------------------------------------------------------------
import tk
from ui_panel import panel, show_help
from constants import screen_dy, scrollbar_dx
#-------------------------------------------------------------------------------
# Creates a non-modal Tkinter user interface for a specified UI object:
#-------------------------------------------------------------------------------
def ui_modal ( ui, parent ):
ui.control = ModalDialog( ui, parent )
try:
ui.prepare_ui()
except:
ui.control.Destroy()
ui.control.ui = None
ui.control = None
ui.result = False
raise
ui.handler.position( ui.info )
ui.control.ShowModal()
#-------------------------------------------------------------------------------
# 'ModalDialog' class:
#-------------------------------------------------------------------------------
class ModalDialog ( wx.Dialog ):
#---------------------------------------------------------------------------
# Initializes the object:
#---------------------------------------------------------------------------
def __init__ ( self, ui, parent ):
wx.Dialog.__init__( self, parent, -1, ui.view.title )
wx.EVT_CLOSE( self, self._on_cancel )
wx.EVT_CHAR( self, self._on_key )
self.ui = ui
# Create the 'context' copies we will need while editing:
context = ui.context
ui._context = context
ui.context = self._copy_context( context )
ui._revert = self._copy_context( context )
# Create the actual trait sheet panel and imbed it in a scrollable
# window:
sizer = wx.BoxSizer( wx.VERTICAL )
sw = wx.ScrolledWindow( self )
trait_sheet = panel( ui, sw )
sizer.Add( trait_sheet, 1, wx.EXPAND | wx.ALL, 4 )
tsdx, tsdy = trait_sheet.GetSizeTuple()
tsdx += 8
tsdy += 8
max_dy = (2 * screen_dy) / 3
sw.SetAutoLayout( True )
sw.SetSizer( sizer )
sw.SetSize( wx.Size( tsdx + ((tsdy > max_dy) * scrollbar_dx),
min( tsdy, max_dy ) ) )
sw.SetScrollRate( 16, 16 )
sw_sizer = wx.BoxSizer( wx.VERTICAL )
sw_sizer.Add( sw, 1, wx.EXPAND )
# Create the necessary special function buttons:
sw_sizer.Add( wx.StaticLine( self, -1 ), 0, wx.EXPAND )
b_sizer = wx.BoxSizer( wx.HORIZONTAL )
if ui.view.apply:
self.apply = self._add_button( 'Apply', self._on_apply, b_sizer,
False )
ui.on_trait_change( self._on_applyable, 'modified',
dispatch = 'ui' )
if ui.view.revert:
self.revert = self._add_button( 'Revert', self._on_revert,
b_sizer, False )
self._add_button( 'OK', self._on_ok, b_sizer )
self._add_button( 'Cancel', self._on_cancel, b_sizer )
if ui.view.help:
self._add_button( 'Help', self._on_help, b_sizer )
sw_sizer.Add( b_sizer, 0, wx.ALIGN_RIGHT | wx.ALL, 5 )
# Lay all of the dialog contents out:
sw_sizer.Fit( self )
self.SetSizer( sw_sizer )
self.SetAutoLayout( True )
#---------------------------------------------------------------------------
# Creates a copy of a 'context' dictionary:
#---------------------------------------------------------------------------
def _copy_context ( self, context ):
""" Creates a copy of a 'context' dictionary.
"""
result = {}
for name, value in context.items():
result[ name ] = value.clone_traits()
return result
#---------------------------------------------------------------------------
# Applies the traits in the 'from' context to the 'to' context:
#---------------------------------------------------------------------------
def _apply_context ( self, from_context, to_context ):
""" Applies the traits in the 'from' context to the 'to' context.
"""
for name, value in from_context.items():
to_context[ name ].copy_traits( value )
#---------------------------------------------------------------------------
# Closes the window and saves changes (if allowed by the handler):
#---------------------------------------------------------------------------
def _on_ok ( self, event = None ):
""" Closes the window and saves changes (if allowed by the handler).
"""
if self.ui.handler.close( self.ui.info, True ):
self._apply_context( self.ui.context, self.ui._context )
self._close_page( wx.ID_OK )
#---------------------------------------------------------------------------
# Closes the window and discards changes (if allowed by the handler):
#---------------------------------------------------------------------------
def _on_cancel ( self, event = None ):
""" Closes the window and discards changes (if allowed by the handler).
"""
if self.ui.handler.close( self.ui.info, False ):
self._apply_context( self.ui._revert, self.ui._context )
self._close_page( wx.ID_CANCEL )
#---------------------------------------------------------------------------
# Handles the 'Help' button being clicked:
#---------------------------------------------------------------------------
def _on_help ( self, event ):
""" Handles the 'Help' button being clicked.
"""
show_help( self.ui, event.GetEventObject() )
#---------------------------------------------------------------------------
# Closes the dialog window:
#---------------------------------------------------------------------------
def _close_page ( self, rc ):
""" Closes the dialog window.
"""
self.EndModal( rc )
self.ui.control = None
self.ui.result = (rc == wx.ID_OK)
self.ui = None
self.Destroy()
#---------------------------------------------------------------------------
# Handles the user hitting the 'Esc'ape key:
#---------------------------------------------------------------------------
def _on_key ( self, event ):
""" Handles the user hitting the 'Esc'ape key.
"""
if event.GetKeyCode() == 0x1B:
self._on_cancel( event )
#---------------------------------------------------------------------------
# Handles an 'Apply' all changes request:
#---------------------------------------------------------------------------
def _on_apply ( self, event ):
""" Handles an 'Apply' changes request.
"""
self._apply_context( self.ui.context, self.ui._context )
self.revert.Enable( True )
self.ui.modified = False
#---------------------------------------------------------------------------
# Handles a 'Revert' all changes request:
#---------------------------------------------------------------------------
def _on_revert ( self, event ):
""" Handles a 'Revert' changes request.
"""
self._apply_context( self.ui._revert, self.ui._context )
self._apply_context( self.ui._revert, self.ui.context )
self.revert.Enable( False )
self.ui.modified = False
#---------------------------------------------------------------------------
# Handles the user interface 'modified' state changing:
#---------------------------------------------------------------------------
def _on_applyable ( self, state ):
""" Handles the user interface 'modified' state changing.
"""
self.apply.Enable( state )
#---------------------------------------------------------------------------
# Creates a new dialog button:
#---------------------------------------------------------------------------
def _add_button ( self, label, action, sizer, enabled = True ):
""" Creates a new dialog button.
"""
button = wx.Button( self, -1, label )
wx.EVT_BUTTON( self, button.GetId(), action )
sizer.Add( button, 0, wx.LEFT, 5 )
button.Enable( enabled )
return button
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