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ParameterEditor.py
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ParameterEditor.py
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# $Id: ParameterEditor.py,v 1.1.1.1.6.2 2017/02/01 04:22:13 jasercio Exp $
#******************************************************************************
# Import external modules.
# Standard modules
import tkinter
# Third-party modules
import Pmw
# Project modules
from ElementEditor import ElementEditor
from Parameter import Parameter
#******************************************************************************
class ParameterEditor(ElementEditor):
"""Class to edit ModelEditor Parameter objects.
ParameterEditor class which allows the user to edit the fields of
a <parameter> element. This compound widget is designed to be
embedded in other widgets.
Data attributes:
_nameEntryField: (Pmw.EntryField) For editing the Parameter
name. Name may be any string.
_valueEntryField: (Pmw.EntryField) For editing the Parameter
value. Value must be a floating-point number.
_scaleEntryField: (Pmw.EntryField) For editing the Parameter scale
factor. Scale must be a floating-point number.
_minEntryField: (Pmw.EntryField) For editing the minimum allowed
Parameter value. If present, min must be a floating-point number.
_maxEntryField: (Pmw.EntryField) For editing the maximum allowed
Parameter value. If present, max must be a floating-point number.
_freeCheckbutton: (tkinter.Checkbutton) For setting the Parameter
free flag.
_free: (tkinter.BooleanVar) Control variable for free flag
checkbutton.
"""
#--------------------------------------------------------------------------
# Class constants
# Define the text field width in characters.
_minTextFieldWidth = 10
_textFieldWidth = max([len(s) for s in Parameter._fieldNames])
_textFieldWidth = max(_textFieldWidth, _minTextFieldWidth)
# Flag to determine if field labels should be shown.
_showLabels = False
#--------------------------------------------------------------------------
def __init__(self,
parent = None,
parameter = None,
showLabels = False,
*args, **kwargs):
"""Initialize this ParameterEditor.
Parameters:
self: This object.
parent: (tkinter.Frame) Parent object for this widget.
parameter: (Parameter) Parameter to initialize fields.
showLabels: (Boolean) True if labels should be printed above
the fields, False otherwise.
Return value:
None.
Description:
Initialize this ParameterEditor.
"""
self._ds9Connector = None
# Set the label printing flag.
ParameterEditor._showLabels = showLabels
# Initialize the parent class (which calls _makeWidgets and
# set for this class).
if parameter is None:
parameter = Parameter()
ElementEditor.__init__(self, parent, parameter, *args, **kwargs)
#--------------------------------------------------------------------------
def _makeWidgets(self):
"""Build child widgets.
Parameters:
self: This object.
Return value:
None.
Description:
Create all of the GUI widgets required by this object.
"""
# Create any inherited widgets.
ElementEditor._makeWidgets(self)
# Start at the top row.
row = 0
# If labels were requested, create and grid them above the
# EntryFields.
if ParameterEditor._showLabels:
col = 0
for fieldName in Parameter._fieldNames:
label = tkinter.Label(self, text = fieldName,
width = ParameterEditor._textFieldWidth)
label.grid(row = row, column = col, sticky = 'ew')
col += 1
row += 1
# Create and grid an arbitrary string EntryField for the
# Parameter name.
entryField = Pmw.EntryField(self, entry_width = \
ParameterEditor._textFieldWidth)
entryField.grid(row = row, column = 0)
self._nameEntryField = entryField
self._balloon.bind(self._nameEntryField, 'Edit the parameter name.')
# Create and grid a real-number EntryField for the Parameter
# value.
entryField = Pmw.EntryField(self, validate = 'real', entry_width = \
ParameterEditor._textFieldWidth, \
modifiedcommand = (lambda: self._updateDS9()) \
)
entryField.grid(row = row, column = 1)
self._valueEntryField = entryField
self._balloon.bind(self._valueEntryField, 'Edit the parameter value.')
# Create and grid a real-number EntryField for the Parameter
# scale.
entryField = Pmw.EntryField(self, validate = 'real', entry_width = \
ParameterEditor._textFieldWidth)
entryField.grid(row = row, column = 2)
self._scaleEntryField = entryField
self._balloon.bind(self._scaleEntryField,
'Edit the scale factor for the parameter value.')
# Create and grid a real-number EntryField for the Parameter
# minimum value.
entryField = Pmw.EntryField(self, validate = 'real', entry_width = \
ParameterEditor._textFieldWidth,
command = self._updateValidation)
entryField.grid(row = row, column = 3)
self._minEntryField = entryField
self._balloon.bind(self._minEntryField,
'Edit the minimum value for the parameter value.')
# Create and grid a real-number EntryField for the Parameter
# maximum value.
entryField = Pmw.EntryField(self, validate = 'real', entry_width = \
ParameterEditor._textFieldWidth,
command = self._updateValidation)
entryField.grid(row = row, column = 4)
self._maxEntryField = entryField
self._balloon.bind(self._maxEntryField,
'Edit the maximum value for the parameter value.')
# Create and grid a Checkbutton for the Parameter free
# flag. Note that we also must create a BooleanVar to store
# the state of the Checkbutton.
self._free = tkinter.BooleanVar()
checkbutton = tkinter.Checkbutton(self, variable = self._free,
width = ParameterEditor.\
_textFieldWidth)
checkbutton.grid(row = row, column = 5)
self._freeCheckbutton = checkbutton
self._balloon.bind(self._freeCheckbutton,
'Check to allow parameter adjustment by the ' +
'likelihood estimator.')
#--------------------------------------------------------------------------
def get(self):
"""Return the contents of the editor.
Parameters:
self: This object.
Return value:
Copy of Parameter being edited.
Description:
Return a new Parameter containing the current state of the
editor. Note that the inherited get method need not be called,
since its work (setting the _tagName attribute of this object)
will be done by the Parameter constructor call.
"""
# Get the name EntryField value.
name = self._nameEntryField.getvalue()
# Get the value EntryField value.
value = self._valueEntryField.getvalue()
# Get the scale EntryField value.
scale = self._scaleEntryField.getvalue()
# Get the min EntryField value, mapping empty string to None.
min = self._minEntryField.getvalue()
if min == '': min = None
# Get the max EntryField value, mapping empty string to None.
max = self._maxEntryField.getvalue()
if max == '': max = None
# Get the status of the free Checkbutton.
free = self._free.get()
# Make a new Parameter from the current field values.
parameter = Parameter(name, value, scale, min, max, free)
# Return the new Parameter.
return parameter
def set(self, parameter):
"""Set the editor state.
Parameters:
self: This object.
parameter: (Parameter): Object to set in this editor.
Return value:
None.
Description:
Set the fields using a Parameter. The inherited set method is
not needed, since all it does is set the _tagNameLabel
attribute, which should be fixed as 'parameter'.
"""
self._disableDS9Update = True # disable updates while loading external data
# Fill in the name EntryField.
name = parameter.getName()
self._nameEntryField.setvalue(name)
# Fill in the value EntryField.
value = parameter.getValue()
self._valueEntryField.setvalue(value)
# Fill in the scale EntryField.
scale = parameter.getScale()
self._scaleEntryField.setvalue(scale)
# Fill in the min EntryField, mapping None to empty string.
min = parameter.getMin()
if min is None:
min = ''
self._minEntryField.setvalue(min)
# Fill in the max EntryField, mapping None to empty string.
max = parameter.getMax()
if max is None:
max = ''
self._maxEntryField.setvalue(max)
# Set the state of the free checkbutton as needed.
if parameter.getFree():
self._freeCheckbutton.select()
else:
self._freeCheckbutton.deselect()
# Update the validation for the value field.
self._updateValidation()
self._disableDS9Update = False # re-enable once data is loaded
def clear(self):
"""Clear this editor.
Parameters:
self: This object.
Return value:
None.
Description:
Clear all of the fields in this editor.
"""
self._disableDS9Update = True # disable ds9 updates while resetting data
self._nameEntryField.setvalue('')
self._valueEntryField.setvalue('')
self._scaleEntryField.setvalue('')
self._minEntryField.setvalue('')
self._maxEntryField.setvalue('')
self._freeCheckbutton.deselect()
# Update the validation for the value field.
self._updateValidation()
self._disableDS9Update = False #re-enable once done
#--------------------------------------------------------------------------
def enable(self):
"""Activate all child widgets.
Parameters:
self: This object.
Return value:
None:
Description:
Activate all of the child widgets in this ParameterEditor.
"""
self._nameEntryField.configure(entry_state = 'normal')
self._valueEntryField.configure(entry_state = 'normal')
self._scaleEntryField.configure(entry_state = 'normal')
self._minEntryField.configure(entry_state = 'normal')
self._maxEntryField.configure(entry_state = 'normal')
self._freeCheckbutton.configure(state = 'normal')
def disable(self):
"""Deactivate all child widgets.
Parameters:
self: This object.
Return value:
None:
Description:
Deactivate all of the child widgets in this ParameterEditor.
"""
self._nameEntryField.configure(entry_state = 'disabled')
self._valueEntryField.configure(entry_state = 'disabled')
self._scaleEntryField.configure(entry_state = 'disabled')
self._minEntryField.configure(entry_state = 'disabled')
self._maxEntryField.configure(entry_state = 'disabled')
self._freeCheckbutton.configure(state = 'disabled')
#--------------------------------------------------------------------------
def _updateValidation(self):
"""Update validation options for value field.
Parameters:
self: This object.
Return value:
None:
Description:
This method updates the validation requirements for the value
field by incorporating restrictions based on the current min
and max fields.
"""
min = self._minEntryField.getvalue()
if min == '':
min = None
max = self._maxEntryField.getvalue()
if max == '':
max = None
value = self._valueEntryField.getvalue()
self._valueEntryField.configure(validate = {'validator': 'real',
'min': min, 'max': max})
self._minEntryField.configure(validate = {'validator': 'real',
'max': max})
self._maxEntryField.configure(validate = {'validator': 'real',
'min': min})
#--------------------------------------------------------------------------
def setDS9Connector(self,connector):
self._ds9Connector = connector
def _updateDS9(self):
if (None != self._ds9Connector and not self._disableDS9Update):
self._ds9Connector.plotSources()
#******************************************************************************
# Self-test code.
import xml.dom.minidom
domDocument = xml.dom.minidom.Document()
# Printing routine for buttons.
def _print(editor):
print (editor.get())
if editor.getChanged(): print ("Changed by the editor.")
# XML printing routine for buttons.
def _printXML(editor):
element = editor.get()
dom = element.toDom(domDocument)
print (dom.toxml())
if editor.getChanged(): print ("Changed by the editor.")
if __name__ == '__main__':
# Create the root window.
root = tkinter.Tk()
Pmw.initialise(root)
root.title('ParameterEditor test')
# Create and grid a labeled editor, buttons to commit and reset
# changes, and buttons to dump the current contents in string and
# XML form.
parameterEditor = ParameterEditor(root, showLabels = True)
parameterEditor.grid(row = 0, column = 0)
commitButton = tkinter.Button(root, text = 'Commit',
command = parameterEditor.commit)
commitButton.grid(row = 0, column = 1)
resetButton = tkinter.Button(root, text = 'Reset',
command = parameterEditor.reset)
resetButton.grid(row = 0, column = 2)
printButton = tkinter.Button(root, text = 'Print',
command = \
lambda: _print(parameterEditor))
printButton.grid(row = 0, column = 3)
printXMLButton = tkinter.Button(root, text = 'Print XML',
command = \
lambda: _printXML(parameterEditor))
printXMLButton.grid(row = 0, column = 4)
# Enter the main program loop.
root.mainloop()