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Viewing changes to examples/demo/Advanced/Apply_Revert_handler_demo.py

  • Committer: Bazaar Package Importer
  • Author(s): Varun Hiremath
  • Date: 2011-07-09 13:57:39 UTC
  • Revision ID: james.westby@ubuntu.com-20110709135739-x5u20q86huissmn1
Tags: upstream-4.0.0
Import upstream version 4.0.0

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examples/demo/Advanced/Apply_Revert_handler_demo.py
 
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#  Copyright (c) 2007, Enthought, Inc.
 
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#  License: BSD Style.
 
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"""
 
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This program demonstrates hows how to add an event handler which performs an
 
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action when the 'Apply' or 'Revert' buttons are pressed.
 
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"""
 
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# Imports:
 
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from traits.api \
 
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    import HasTraits, Str, List
 
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from traitsui.api \
 
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    import Item, View, Handler, HGroup, VGroup
 
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# 'ApplyRevert_Handler' class:
 
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class ApplyRevert_Handler ( Handler ):
 
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    def apply ( self, info ):
 
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        object = info.object
 
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        object.stack.insert( 0, object.input )
 
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        object.queue.append( object.input )
 
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    def revert ( self, info ):
 
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        # Do something exciting here...
 
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        print 'revert called...'
 
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# 'ApplyRevertDemo' class:
 
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class ApplyRevertDemo ( HasTraits ):
 
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    # Trait definitions:
 
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    input = Str
 
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    stack = List
 
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    queue = List
 
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    # Traits view definitions:
 
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    traits_view = View(
 
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        VGroup(
 
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            VGroup(
 
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                Item( 'input',
 
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                      show_label = False
 
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                ),
 
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                label       = 'Input',
 
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                show_border = True
 
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            ),
 
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            HGroup(
 
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                VGroup(
 
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                    Item( 'stack',
 
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                          show_label = False,
 
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                          height     = 50,
 
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                          width      = 100,
 
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                          style      = 'readonly'
 
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                    ),
 
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                    label       = 'Stack',
 
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                    show_border = True
 
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                ),
 
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                VGroup(
 
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                    Item( 'queue',
 
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                          show_label = False,
 
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                          height     = 50,
 
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                          width      = 100,
 
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                          style      = 'readonly'
 
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                    ),
 
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                    label       = 'Queue',
 
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                    show_border = True
 
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                )
 
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            )
 
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        ),
 
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        title   = 'Apply/Revert example',
 
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        buttons = [ 'Apply', 'Revert' ],
 
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        kind    = 'modal',
 
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        handler = ApplyRevert_Handler
 
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    )
 
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# Create the demo:
 
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modal_popup = ApplyRevertDemo()
 
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# Run the demo (if invoked from the command line):
 
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if __name__ == '__main__':
 
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    modal_popup.configure_traits()