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"""
Demonstrates using the TreeEditor to display a hierarchically organized data
structure.
In this case, the tree has the following hierarchy:
- Partner
- Company
- Department
- Employee
"""
from traits.api \
import HasTraits, Str, Regex, List, Instance
from traitsui.api \
import Item, View, TreeEditor, TreeNode
class Employee ( HasTraits ):
name = Str( '<unknown>' )
title = Str
phone = Regex( regex = r'\d\d\d-\d\d\d\d' )
def default_title ( self ):
self.title = 'Senior Engineer'
class Department ( HasTraits ):
name = Str( '<unknown>' )
employees = List( Employee )
class Company ( HasTraits ):
name = Str( '<unknown>' )
departments = List( Department )
employees = List( Employee )
# Create an empty view for objects that have no data to display:
no_view = View()
# Define the TreeEditor used to display the hierarchy:
tree_editor = TreeEditor(
nodes = [
TreeNode( node_for = [ Company ],
auto_open = True,
children = '',
label = 'name',
view = View( [ 'name' ] )
),
TreeNode( node_for = [ Company ],
auto_open = True,
children = 'departments',
label = '=Departments',
view = no_view,
add = [ Department ]
),
TreeNode( node_for = [ Company ],
auto_open = True,
children = 'employees',
label = '=Employees',
view = no_view,
add = [ Employee ]
),
TreeNode( node_for = [ Department ],
auto_open = True,
children = 'employees',
label = 'name',
view = View( [ 'name' ] ),
add = [ Employee ]
),
TreeNode( node_for = [ Employee ],
auto_open = True,
label = 'name',
view = View( [ 'name', 'title', 'phone' ] )
)
]
)
class Partner ( HasTraits ):
name = Str( '<unknown>' )
company = Instance( Company )
view = View(
Item( name = 'company',
editor = tree_editor,
show_label = False
),
title = 'Company Structure',
buttons = [ 'OK' ],
resizable = True,
style = 'custom',
width = .3,
height = .3
)
# Create an example data structure:
jason = Employee( name = 'Jason',
title = 'Senior Engineer',
phone = '536-1057' )
mike = Employee( name = 'Mike',
title = 'Senior Engineer',
phone = '536-1057' )
dave = Employee( name = 'Dave',
title = 'Senior Software Developer',
phone = '536-1057' )
martin = Employee( name = 'Martin',
title = 'Senior Engineer',
phone = '536-1057' )
duncan = Employee( name = 'Duncan',
title = 'Consultant',
phone = '526-1057' )
# Create the demo:
popup = Partner(
name = 'Enthought, Inc.',
company = Company(
name = 'Enthought',
employees = [ dave, martin, duncan, jason, mike ],
departments = [
Department(
name = 'Business',
employees = [ jason, mike ]
),
Department(
name = 'Scientific',
employees = [ dave, martin, duncan ]
)
]
)
)
# Run the demo (if invoked from the command line):
if __name__ == '__main__':
popup.configure_traits()
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