FittingWidget.py @ c3eb858

ESS_GUIESS_GUI_DocsESS_GUI_batch_fittingESS_GUI_bumps_abstractionESS_GUI_iss1116ESS_GUI_iss879ESS_GUI_iss959ESS_GUI_openclESS_GUI_orderingESS_GUI_sync_sascalc

Last change on this file since c3eb858 was c3eb858, checked in by Piotr Rozyczko <rozyczko@…>, 6 years ago
Don't display DEBUG level messages in the log explorer
Property mode set to `100644`
File size: 88.9 KB

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1	import json
2	import os
3	from collections import defaultdict
4
5
6	import logging
7	import traceback
8	from twisted.internet import threads
9	import numpy as np
10	import webbrowser
11
12	from PyQt5 import QtCore
13	from PyQt5 import QtGui
14	from PyQt5 import QtWidgets
15
16	from sasmodels import product
17	from sasmodels import generate
18	from sasmodels import modelinfo
19	from sasmodels.sasview_model import load_standard_models
20	from sasmodels.weights import MODELS as POLYDISPERSITY_MODELS
21
22	from sas.sascalc.fit.BumpsFitting import BumpsFit as Fit
23
24	import sas.qtgui.Utilities.GuiUtils as GuiUtils
25	import sas.qtgui.Utilities.LocalConfig as LocalConfig
26	from sas.qtgui.Utilities.CategoryInstaller import CategoryInstaller
27	from sas.qtgui.Plotting.PlotterData import Data1D
28	from sas.qtgui.Plotting.PlotterData import Data2D
29
30	from sas.qtgui.Perspectives.Fitting.UI.FittingWidgetUI import Ui_FittingWidgetUI
31	from sas.qtgui.Perspectives.Fitting.FitThread import FitThread
32	from sas.qtgui.Perspectives.Fitting.ConsoleUpdate import ConsoleUpdate
33
34	from sas.qtgui.Perspectives.Fitting.ModelThread import Calc1D
35	from sas.qtgui.Perspectives.Fitting.ModelThread import Calc2D
36	from sas.qtgui.Perspectives.Fitting.FittingLogic import FittingLogic
37	from sas.qtgui.Perspectives.Fitting import FittingUtilities
38	from sas.qtgui.Perspectives.Fitting.SmearingWidget import SmearingWidget
39	from sas.qtgui.Perspectives.Fitting.OptionsWidget import OptionsWidget
40	from sas.qtgui.Perspectives.Fitting.FitPage import FitPage
41	from sas.qtgui.Perspectives.Fitting.ViewDelegate import ModelViewDelegate
42	from sas.qtgui.Perspectives.Fitting.ViewDelegate import PolyViewDelegate
43	from sas.qtgui.Perspectives.Fitting.ViewDelegate import MagnetismViewDelegate
44	from sas.qtgui.Perspectives.Fitting.Constraint import Constraint
45	from sas.qtgui.Perspectives.Fitting.MultiConstraint import MultiConstraint
46
47
48	TAB_MAGNETISM = 4
49	TAB_POLY = 3
50	CATEGORY_DEFAULT = "Choose category..."
51	CATEGORY_STRUCTURE = "Structure Factor"
52	STRUCTURE_DEFAULT = "None"
53
54	DEFAULT_POLYDISP_FUNCTION = 'gaussian'
55
56
57	class ToolTippedItemModel(QtGui.QStandardItemModel):
58	"""
59	Subclass from QStandardItemModel to allow displaying tooltips in
60	QTableView model.
61	"""
62	def __init__(self, parent=None):
63	QtGui.QStandardItemModel.__init__(self,parent)
64
65	def headerData(self, section, orientation, role=QtCore.Qt.DisplayRole):
66	"""
67	Displays tooltip for each column's header
68	:param section:
69	:param orientation:
70	:param role:
71	:return:
72	"""
73	if role == QtCore.Qt.ToolTipRole:
74	if orientation == QtCore.Qt.Horizontal:
75	return str(self.header_tooltips[section])
76
77	return QtGui.QStandardItemModel.headerData(self, section, orientation, role)
78
79	class FittingWidget(QtWidgets.QWidget, Ui_FittingWidgetUI):
80	"""
81	Main widget for selecting form and structure factor models
82	"""
83	constraintAddedSignal = QtCore.pyqtSignal(list)
84	newModelSignal = QtCore.pyqtSignal()
85	def __init__(self, parent=None, data=None, tab_id=1):
86
87	super(FittingWidget, self).__init__()
88
89	# Necessary globals
90	self.parent = parent
91
92	# Which tab is this widget displayed in?
93	self.tab_id = tab_id
94
95	# Main Data[12]D holder
96	self.logic = FittingLogic()
97
98	# Globals
99	self.initializeGlobals()
100
101	# Set up desired logging level
102	logging.disable(LocalConfig.DISABLE_LOGGING)
103
104	# Main GUI setup up
105	self.setupUi(self)
106	self.setWindowTitle("Fitting")
107
108	# Set up tabs widgets
109	self.initializeWidgets()
110
111	# Set up models and views
112	self.initializeModels()
113
114	# Defaults for the structure factors
115	self.setDefaultStructureCombo()
116
117	# Make structure factor and model CBs disabled
118	self.disableModelCombo()
119	self.disableStructureCombo()
120
121	# Generate the category list for display
122	self.initializeCategoryCombo()
123
124	# Connect signals to controls
125	self.initializeSignals()
126
127	# Initial control state
128	self.initializeControls()
129
130	# Display HTML content
131	#self.setupHelp()
132
133	# New font to display angstrom symbol
134	new_font = 'font-family: -apple-system, "Helvetica Neue", "Ubuntu";'
135	self.label_17.setStyleSheet(new_font)
136	self.label_19.setStyleSheet(new_font)
137
138	self._index = None
139	if data is not None:
140	self.data = data
141
142	@property
143	def data(self):
144	return self.logic.data
145
146	@data.setter
147	def data(self, value):
148	""" data setter """
149	# Value is either a list of indices for batch fitting or a simple index
150	# for standard fitting. Assure we have a list, regardless.
151	if isinstance(value, list):
152	self.is_batch_fitting = True
153	else:
154	value = [value]
155
156	assert isinstance(value[0], QtGui.QStandardItem)
157	# _index contains the QIndex with data
158	self._index = value[0]
159
160	# Keep reference to all datasets for batch
161	self.all_data = value
162
163	# Update logics with data items
164	# Logics.data contains only a single Data1D/Data2D object
165	self.logic.data = GuiUtils.dataFromItem(value[0])
166
167	# Overwrite data type descriptor
168	self.is2D = True if isinstance(self.logic.data, Data2D) else False
169
170	# Let others know we're full of data now
171	self.data_is_loaded = True
172
173	# Enable/disable UI components
174	self.setEnablementOnDataLoad()
175
176	def initializeGlobals(self):
177	"""
178	Initialize global variables used in this class
179	"""
180	# SasModel is loaded
181	self.model_is_loaded = False
182	# Data[12]D passed and set
183	self.data_is_loaded = False
184	# Batch/single fitting
185	self.is_batch_fitting = False
186	self.is_chain_fitting = False
187	# Current SasModel in view
188	self.kernel_module = None
189	# Current SasModel view dimension
190	self.is2D = False
191	# Current SasModel is multishell
192	self.model_has_shells = False
193	# Utility variable to enable unselectable option in category combobox
194	self._previous_category_index = 0
195	# Utility variable for multishell display
196	self._last_model_row = 0
197	# Dictionary of {model name: model class} for the current category
198	self.models = {}
199	# Parameters to fit
200	self.parameters_to_fit = None
201	# Fit options
202	self.q_range_min = 0.005
203	self.q_range_max = 0.1
204	self.npts = 25
205	self.log_points = False
206	self.weighting = 0
207	self.chi2 = None
208	# Does the control support UNDO/REDO
209	# temporarily off
210	self.undo_supported = False
211	self.page_stack = []
212	self.all_data = []
213	# Polydisp widget table default index for function combobox
214	self.orig_poly_index = 3
215
216	# Page id for fitting
217	# To keep with previous SasView values, use 200 as the start offset
218	self.page_id = 200 + self.tab_id
219
220	# Data for chosen model
221	self.model_data = None
222
223	# Which shell is being currently displayed?
224	self.current_shell_displayed = 0
225	# List of all shell-unique parameters
226	self.shell_names = []
227
228	# Error column presence in parameter display
229	self.has_error_column = False
230	self.has_poly_error_column = False
231	self.has_magnet_error_column = False
232
233	# signal communicator
234	self.communicate = self.parent.communicate
235
236	def initializeWidgets(self):
237	"""
238	Initialize widgets for tabs
239	"""
240	# Options widget
241	layout = QtWidgets.QGridLayout()
242	self.options_widget = OptionsWidget(self, self.logic)
243	layout.addWidget(self.options_widget)
244	self.tabOptions.setLayout(layout)
245
246	# Smearing widget
247	layout = QtWidgets.QGridLayout()
248	self.smearing_widget = SmearingWidget(self)
249	layout.addWidget(self.smearing_widget)
250	self.tabResolution.setLayout(layout)
251
252	# Define bold font for use in various controls
253	self.boldFont = QtGui.QFont()
254	self.boldFont.setBold(True)
255
256	# Set data label
257	self.label.setFont(self.boldFont)
258	self.label.setText("No data loaded")
259	self.lblFilename.setText("")
260
261	# Magnetic angles explained in one picture
262	self.magneticAnglesWidget = QtWidgets.QWidget()
263	labl = QtWidgets.QLabel(self.magneticAnglesWidget)
264	pixmap = QtGui.QPixmap(GuiUtils.IMAGES_DIRECTORY_LOCATION + '/M_angles_pic.bmp')
265	labl.setPixmap(pixmap)
266	self.magneticAnglesWidget.setFixedSize(pixmap.width(), pixmap.height())
267
268	def initializeModels(self):
269	"""
270	Set up models and views
271	"""
272	# Set the main models
273	# We can't use a single model here, due to restrictions on flattening
274	# the model tree with subclassed QAbstractProxyModel...
275	self._model_model = ToolTippedItemModel()
276	self._poly_model = ToolTippedItemModel()
277	self._magnet_model = ToolTippedItemModel()
278
279	# Param model displayed in param list
280	self.lstParams.setModel(self._model_model)
281	self.readCategoryInfo()
282
283	self.model_parameters = None
284
285	# Delegates for custom editing and display
286	self.lstParams.setItemDelegate(ModelViewDelegate(self))
287
288	self.lstParams.setAlternatingRowColors(True)
289	stylesheet = """
290
291	QTreeView {
292	paint-alternating-row-colors-for-empty-area:0;
293	}
294
295	QTreeView::item:hover {
296	background: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1, stop: 0 #e7effd, stop: 1 #cbdaf1);
297	border: 1px solid #bfcde4;
298	}
299
300	QTreeView::item:selected {
301	border: 1px solid #567dbc;
302	}
303
304	QTreeView::item:selected:active{
305	background: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1, stop: 0 #6ea1f1, stop: 1 #567dbc);
306	}
307
308	QTreeView::item:selected:!active {
309	background: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1, stop: 0 #6b9be8, stop: 1 #577fbf);
310	}
311	"""
312	self.lstParams.setStyleSheet(stylesheet)
313	self.lstParams.setContextMenuPolicy(QtCore.Qt.CustomContextMenu)
314	self.lstParams.customContextMenuRequested.connect(self.showModelContextMenu)
315	self.lstParams.setAttribute(QtCore.Qt.WA_MacShowFocusRect, False)
316	# Poly model displayed in poly list
317	self.lstPoly.setModel(self._poly_model)
318	self.setPolyModel()
319	self.setTableProperties(self.lstPoly)
320	# Delegates for custom editing and display
321	self.lstPoly.setItemDelegate(PolyViewDelegate(self))
322	# Polydispersity function combo response
323	self.lstPoly.itemDelegate().combo_updated.connect(self.onPolyComboIndexChange)
324	self.lstPoly.itemDelegate().filename_updated.connect(self.onPolyFilenameChange)
325
326	# Magnetism model displayed in magnetism list
327	self.lstMagnetic.setModel(self._magnet_model)
328	self.setMagneticModel()
329	self.setTableProperties(self.lstMagnetic)
330	# Delegates for custom editing and display
331	self.lstMagnetic.setItemDelegate(MagnetismViewDelegate(self))
332
333	def initializeCategoryCombo(self):
334	"""
335	Model category combo setup
336	"""
337	category_list = sorted(self.master_category_dict.keys())
338	self.cbCategory.addItem(CATEGORY_DEFAULT)
339	self.cbCategory.addItems(category_list)
340	self.cbCategory.addItem(CATEGORY_STRUCTURE)
341	self.cbCategory.setCurrentIndex(0)
342
343	def setEnablementOnDataLoad(self):
344	"""
345	Enable/disable various UI elements based on data loaded
346	"""
347	# Tag along functionality
348	self.label.setText("Data loaded from: ")
349	self.lblFilename.setText(self.logic.data.filename)
350	self.updateQRange()
351	# Switch off Data2D control
352	self.chk2DView.setEnabled(False)
353	self.chk2DView.setVisible(False)
354	self.chkMagnetism.setEnabled(self.is2D)
355	self.tabFitting.setTabEnabled(TAB_MAGNETISM, self.is2D)
356	# Combo box or label for file name"
357	if self.is_batch_fitting:
358	self.lblFilename.setVisible(False)
359	for dataitem in self.all_data:
360	filename = GuiUtils.dataFromItem(dataitem).filename
361	self.cbFileNames.addItem(filename)
362	self.cbFileNames.setVisible(True)
363	self.chkChainFit.setEnabled(True)
364	self.chkChainFit.setVisible(True)
365	# This panel is not designed to view individual fits, so disable plotting
366	self.cmdPlot.setVisible(False)
367	# Similarly on other tabs
368	self.options_widget.setEnablementOnDataLoad()
369	self.onSelectModel()
370	# Smearing tab
371	self.smearing_widget.updateSmearing(self.data)
372
373	def acceptsData(self):
374	""" Tells the caller this widget can accept new dataset """
375	return not self.data_is_loaded
376
377	def disableModelCombo(self):
378	""" Disable the combobox """
379	self.cbModel.setEnabled(False)
380	self.lblModel.setEnabled(False)
381
382	def enableModelCombo(self):
383	""" Enable the combobox """
384	self.cbModel.setEnabled(True)
385	self.lblModel.setEnabled(True)
386
387	def disableStructureCombo(self):
388	""" Disable the combobox """
389	self.cbStructureFactor.setEnabled(False)
390	self.lblStructure.setEnabled(False)
391
392	def enableStructureCombo(self):
393	""" Enable the combobox """
394	self.cbStructureFactor.setEnabled(True)
395	self.lblStructure.setEnabled(True)
396
397	def togglePoly(self, isChecked):
398	""" Enable/disable the polydispersity tab """
399	self.tabFitting.setTabEnabled(TAB_POLY, isChecked)
400
401	def toggleMagnetism(self, isChecked):
402	""" Enable/disable the magnetism tab """
403	self.tabFitting.setTabEnabled(TAB_MAGNETISM, isChecked)
404
405	def toggleChainFit(self, isChecked):
406	""" Enable/disable chain fitting """
407	self.is_chain_fitting = isChecked
408
409	def toggle2D(self, isChecked):
410	""" Enable/disable the controls dependent on 1D/2D data instance """
411	self.chkMagnetism.setEnabled(isChecked)
412	self.is2D = isChecked
413	# Reload the current model
414	if self.kernel_module:
415	self.onSelectModel()
416
417	def initializeControls(self):
418	"""
419	Set initial control enablement
420	"""
421	self.cbFileNames.setVisible(False)
422	self.cmdFit.setEnabled(False)
423	self.cmdPlot.setEnabled(False)
424	self.options_widget.cmdComputePoints.setVisible(False) # probably redundant
425	self.chkPolydispersity.setEnabled(True)
426	self.chkPolydispersity.setCheckState(False)
427	self.chk2DView.setEnabled(True)
428	self.chk2DView.setCheckState(False)
429	self.chkMagnetism.setEnabled(False)
430	self.chkMagnetism.setCheckState(False)
431	self.chkChainFit.setEnabled(False)
432	self.chkChainFit.setVisible(False)
433	# Tabs
434	self.tabFitting.setTabEnabled(TAB_POLY, False)
435	self.tabFitting.setTabEnabled(TAB_MAGNETISM, False)
436	self.lblChi2Value.setText("---")
437	# Smearing tab
438	self.smearing_widget.updateSmearing(self.data)
439	# Line edits in the option tab
440	self.updateQRange()
441
442	def initializeSignals(self):
443	"""
444	Connect GUI element signals
445	"""
446	# Comboboxes
447	self.cbStructureFactor.currentIndexChanged.connect(self.onSelectStructureFactor)
448	self.cbCategory.currentIndexChanged.connect(self.onSelectCategory)
449	self.cbModel.currentIndexChanged.connect(self.onSelectModel)
450	self.cbFileNames.currentIndexChanged.connect(self.onSelectBatchFilename)
451	# Checkboxes
452	self.chk2DView.toggled.connect(self.toggle2D)
453	self.chkPolydispersity.toggled.connect(self.togglePoly)
454	self.chkMagnetism.toggled.connect(self.toggleMagnetism)
455	self.chkChainFit.toggled.connect(self.toggleChainFit)
456	# Buttons
457	self.cmdFit.clicked.connect(self.onFit)
458	self.cmdPlot.clicked.connect(self.onPlot)
459	self.cmdHelp.clicked.connect(self.onHelp)
460	self.cmdMagneticDisplay.clicked.connect(self.onDisplayMagneticAngles)
461
462	# Respond to change in parameters from the UI
463	self._model_model.itemChanged.connect(self.onMainParamsChange)
464	#self.constraintAddedSignal.connect(self.modifyViewOnConstraint)
465	self._poly_model.itemChanged.connect(self.onPolyModelChange)
466	self._magnet_model.itemChanged.connect(self.onMagnetModelChange)
467
468	# Signals from separate tabs asking for replot
469	self.options_widget.plot_signal.connect(self.onOptionsUpdate)
470
471	def modelName(self):
472	"""
473	Returns model name, by default M<tab#>, e.g. M1, M2
474	"""
475	return "M%i" % self.tab_id
476
477	def nameForFittedData(self, name):
478	"""
479	Generate name for the current fit
480	"""
481	if self.is2D:
482	name += "2d"
483	name = "%s [%s]" % (self.modelName(), name)
484	return name
485
486	def showModelContextMenu(self, position):
487	"""
488	Show context specific menu in the parameter table.
489	When clicked on parameter(s): fitting/constraints options
490	When clicked on white space: model description
491	"""
492	rows = [s.row() for s in self.lstParams.selectionModel().selectedRows()]
493	menu = self.showModelDescription() if not rows else self.modelContextMenu(rows)
494	try:
495	menu.exec_(self.lstParams.viewport().mapToGlobal(position))
496	except AttributeError as ex:
497	logging.error("Error generating context menu: %s" % ex)
498	return
499
500	def modelContextMenu(self, rows):
501	"""
502	Create context menu for the parameter selection
503	"""
504	menu = QtWidgets.QMenu()
505	num_rows = len(rows)
506	if num_rows < 1:
507	return menu
508	# Select for fitting
509	param_string = "parameter " if num_rows==1 else "parameters "
510	to_string = "to its current value" if num_rows==1 else "to their current values"
511	has_constraints = any([self.rowHasConstraint(i) for i in rows])
512
513	self.actionSelect = QtWidgets.QAction(self)
514	self.actionSelect.setObjectName("actionSelect")
515	self.actionSelect.setText(QtCore.QCoreApplication.translate("self", "Select "+param_string+" for fitting"))
516	# Unselect from fitting
517	self.actionDeselect = QtWidgets.QAction(self)
518	self.actionDeselect.setObjectName("actionDeselect")
519	self.actionDeselect.setText(QtCore.QCoreApplication.translate("self", "De-select "+param_string+" from fitting"))
520
521	self.actionConstrain = QtWidgets.QAction(self)
522	self.actionConstrain.setObjectName("actionConstrain")
523	self.actionConstrain.setText(QtCore.QCoreApplication.translate("self", "Constrain "+param_string + to_string))
524
525	self.actionRemoveConstraint = QtWidgets.QAction(self)
526	self.actionRemoveConstraint.setObjectName("actionRemoveConstrain")
527	self.actionRemoveConstraint.setText(QtCore.QCoreApplication.translate("self", "Remove constraint"))
528
529	self.actionMultiConstrain = QtWidgets.QAction(self)
530	self.actionMultiConstrain.setObjectName("actionMultiConstrain")
531	self.actionMultiConstrain.setText(QtCore.QCoreApplication.translate("self", "Constrain selected parameters to their current values"))
532
533	self.actionMutualMultiConstrain = QtWidgets.QAction(self)
534	self.actionMutualMultiConstrain.setObjectName("actionMutualMultiConstrain")
535	self.actionMutualMultiConstrain.setText(QtCore.QCoreApplication.translate("self", "Mutual constrain of selected parameters..."))
536
537	menu.addAction(self.actionSelect)
538	menu.addAction(self.actionDeselect)
539	menu.addSeparator()
540
541	if has_constraints:
542	menu.addAction(self.actionRemoveConstraint)
543	#if num_rows == 1:
544	# menu.addAction(self.actionEditConstraint)
545	else:
546	menu.addAction(self.actionConstrain)
547	if num_rows == 2:
548	menu.addAction(self.actionMutualMultiConstrain)
549
550	# Define the callbacks
551	self.actionConstrain.triggered.connect(self.addSimpleConstraint)
552	self.actionRemoveConstraint.triggered.connect(self.deleteConstraint)
553	self.actionMutualMultiConstrain.triggered.connect(self.showMultiConstraint)
554	self.actionSelect.triggered.connect(self.selectParameters)
555	self.actionDeselect.triggered.connect(self.deselectParameters)
556	return menu
557
558	def showMultiConstraint(self):
559	"""
560	Show the constraint widget and receive the expression
561	"""
562	selected_rows = self.lstParams.selectionModel().selectedRows()
563	# There have to be only two rows selected. The caller takes care of that
564	# but let's check the correctness.
565	assert(len(selected_rows)==2)
566
567	params_list = [s.data() for s in selected_rows]
568	# Create and display the widget for param1 and param2
569	mc_widget = MultiConstraint(self, params=params_list)
570	if mc_widget.exec_() != QtWidgets.QDialog.Accepted:
571	return
572
573	constraint = Constraint()
574	c_text = mc_widget.txtConstraint.text()
575
576	# widget.params[0] is the parameter we're constraining
577	constraint.param = mc_widget.params[0]
578	# Function should have the model name preamble
579	model_name = self.kernel_module.name
580	constraint.func = model_name + "." + c_text
581	# Which row is the constrained parameter in?
582	row = self.getRowFromName(constraint.param)
583
584	# Create a new item and add the Constraint object as a child
585	self.addConstraintToRow(constraint=constraint, row=row)
586
587	def getRowFromName(self, name):
588	"""
589	Given parameter name get the row number in self._model_model
590	"""
591	for row in range(self._model_model.rowCount()):
592	row_name = self._model_model.item(row).text()
593	if row_name == name:
594	return row
595	return None
596
597	def getParamNames(self):
598	"""
599	Return list of all parameters for the current model
600	"""
601	return [self._model_model.item(row).text() for row in range(self._model_model.rowCount())]
602
603	def modifyViewOnRow(self, row, font=None, brush=None):
604	"""
605	Chage how the given row of the main model is shown
606	"""
607	fields_enabled = False
608	if font is None:
609	font = QtGui.QFont()
610	fields_enabled = True
611	if brush is None:
612	brush = QtGui.QBrush()
613	fields_enabled = True
614	self._model_model.blockSignals(True)
615	# Modify font and foreground of affected rows
616	for column in range(0, self._model_model.columnCount()):
617	self._model_model.item(row, column).setForeground(brush)
618	self._model_model.item(row, column).setFont(font)
619	self._model_model.item(row, column).setEditable(fields_enabled)
620	self._model_model.blockSignals(False)
621
622	def addConstraintToRow(self, constraint=None, row=0):
623	"""
624	Adds the constraint object to requested row
625	"""
626	# Create a new item and add the Constraint object as a child
627	assert(isinstance(constraint, Constraint))
628	assert(0<=row<=self._model_model.rowCount())
629
630	item = QtGui.QStandardItem()
631	item.setData(constraint)
632	self._model_model.item(row, 1).setChild(0, item)
633	# Set min/max to the value constrained
634	self.constraintAddedSignal.emit([row])
635	# Show visual hints for the constraint
636	font = QtGui.QFont()
637	font.setItalic(True)
638	brush = QtGui.QBrush(QtGui.QColor('blue'))
639	self.modifyViewOnRow(row, font=font, brush=brush)
640	self.communicate.statusBarUpdateSignal.emit('Constraint added')
641
642	def addSimpleConstraint(self):
643	"""
644	Adds a constraint on a single parameter.
645	"""
646	min_col = self.lstParams.itemDelegate().param_min
647	max_col = self.lstParams.itemDelegate().param_max
648	for row in self.selectedParameters():
649	param = self._model_model.item(row, 0).text()
650	value = self._model_model.item(row, 1).text()
651	min_t = self._model_model.item(row, min_col).text()
652	max_t = self._model_model.item(row, max_col).text()
653	# Create a Constraint object
654	constraint = Constraint(param=param, value=value, min=min_t, max=max_t)
655	# Create a new item and add the Constraint object as a child
656	item = QtGui.QStandardItem()
657	item.setData(constraint)
658	self._model_model.item(row, 1).setChild(0, item)
659	# Assumed correctness from the validator
660	value = float(value)
661	# BUMPS calculates log(max-min) without any checks, so let's assign minor range
662	min_v = value - (value/10000.0)
663	max_v = value + (value/10000.0)
664	# Set min/max to the value constrained
665	self._model_model.item(row, min_col).setText(str(min_v))
666	self._model_model.item(row, max_col).setText(str(max_v))
667	self.constraintAddedSignal.emit([row])
668	# Show visual hints for the constraint
669	font = QtGui.QFont()
670	font.setItalic(True)
671	brush = QtGui.QBrush(QtGui.QColor('blue'))
672	self.modifyViewOnRow(row, font=font, brush=brush)
673	self.communicate.statusBarUpdateSignal.emit('Constraint added')
674
675	def deleteConstraint(self):
676	"""
677	Delete constraints from selected parameters.
678	"""
679	self.deleteConstraintOnParameter(param=None)
680
681	def deleteConstraintOnParameter(self, param=None):
682	"""
683	Delete the constraint on model parameter 'param'
684	"""
685	min_col = self.lstParams.itemDelegate().param_min
686	max_col = self.lstParams.itemDelegate().param_max
687	for row in range(self._model_model.rowCount()):
688	# Get the Constraint object from of the model item
689	item = self._model_model.item(row, 1)
690	if not item.hasChildren():
691	continue
692	constraint = item.child(0).data()
693	if constraint is None:
694	continue
695	if not isinstance(constraint, Constraint):
696	continue
697	if param and constraint.param != param:
698	continue
699	# Now we got the right row. Delete the constraint and clean up
700	# Retrieve old values and put them on the model
701	if constraint.min is not None:
702	self._model_model.item(row, min_col).setText(constraint.min)
703	if constraint.max is not None:
704	self._model_model.item(row, max_col).setText(constraint.max)
705	# Remove constraint item
706	item.removeRow(0)
707	self.constraintAddedSignal.emit([row])
708	self.modifyViewOnRow(row)
709
710	self.communicate.statusBarUpdateSignal.emit('Constraint removed')
711
712	def getConstraintForRow(self, row):
713	"""
714	For the given row, return its constraint, if any
715	"""
716	try:
717	item = self._model_model.item(row, 1)
718	return item.child(0).data()
719	except AttributeError:
720	# return none when no constraints
721	return None
722
723	def rowHasConstraint(self, row):
724	"""
725	Finds out if row of the main model has a constraint child
726	"""
727	item = self._model_model.item(row,1)
728	if item.hasChildren():
729	c = item.child(0).data()
730	if isinstance(c, Constraint):
731	return True
732	return False
733
734	def rowHasActiveConstraint(self, row):
735	"""
736	Finds out if row of the main model has an active constraint child
737	"""
738	item = self._model_model.item(row,1)
739	if item.hasChildren():
740	c = item.child(0).data()
741	if isinstance(c, Constraint) and c.active:
742	return True
743	return False
744
745	def rowHasActiveComplexConstraint(self, row):
746	"""
747	Finds out if row of the main model has an active, nontrivial constraint child
748	"""
749	item = self._model_model.item(row,1)
750	if item.hasChildren():
751	c = item.child(0).data()
752	if isinstance(c, Constraint) and c.func and c.active:
753	return True
754	return False
755
756	def selectParameters(self):
757	"""
758	Selected parameter is chosen for fitting
759	"""
760	status = QtCore.Qt.Checked
761	self.setParameterSelection(status)
762
763	def deselectParameters(self):
764	"""
765	Selected parameters are removed for fitting
766	"""
767	status = QtCore.Qt.Unchecked
768	self.setParameterSelection(status)
769
770	def selectedParameters(self):
771	""" Returns list of selected (highlighted) parameters """
772	return [s.row() for s in self.lstParams.selectionModel().selectedRows()
773	if self.isCheckable(s.row())]
774
775	def setParameterSelection(self, status=QtCore.Qt.Unchecked):
776	"""
777	Selected parameters are chosen for fitting
778	"""
779	# Convert to proper indices and set requested enablement
780	for row in self.selectedParameters():
781	self._model_model.item(row, 0).setCheckState(status)
782
783	def getConstraintsForModel(self):
784	"""
785	Return a list of tuples. Each tuple contains constraints mapped as
786	('constrained parameter', 'function to constrain')
787	e.g. [('sld','5*sld_solvent')]
788	"""
789	param_number = self._model_model.rowCount()
790	params = [(self._model_model.item(s, 0).text(),
791	self._model_model.item(s, 1).child(0).data().func)
792	for s in range(param_number) if self.rowHasActiveConstraint(s)]
793	return params
794
795	def getComplexConstraintsForModel(self):
796	"""
797	Return a list of tuples. Each tuple contains constraints mapped as
798	('constrained parameter', 'function to constrain')
799	e.g. [('sld','5*M2.sld_solvent')].
800	Only for constraints with defined VALUE
801	"""
802	param_number = self._model_model.rowCount()
803	params = [(self._model_model.item(s, 0).text(),
804	self._model_model.item(s, 1).child(0).data().func)
805	for s in range(param_number) if self.rowHasActiveComplexConstraint(s)]
806	return params
807
808	def getConstraintObjectsForModel(self):
809	"""
810	Returns Constraint objects present on the whole model
811	"""
812	param_number = self._model_model.rowCount()
813	constraints = [self._model_model.item(s, 1).child(0).data()
814	for s in range(param_number) if self.rowHasConstraint(s)]
815
816	return constraints
817
818	def showModelDescription(self):
819	"""
820	Creates a window with model description, when right clicked in the treeview
821	"""
822	msg = 'Model description:\n'
823	if self.kernel_module is not None:
824	if str(self.kernel_module.description).rstrip().lstrip() == '':
825	msg += "Sorry, no information is available for this model."
826	else:
827	msg += self.kernel_module.description + '\n'
828	else:
829	msg += "You must select a model to get information on this"
830
831	menu = QtWidgets.QMenu()
832	label = QtWidgets.QLabel(msg)
833	action = QtWidgets.QWidgetAction(self)
834	action.setDefaultWidget(label)
835	menu.addAction(action)
836	return menu
837
838	def onSelectModel(self):
839	"""
840	Respond to select Model from list event
841	"""
842	model = self.cbModel.currentText()
843
844	# empty combobox forced to be read
845	if not model:
846	return
847	# Reset structure factor
848	self.cbStructureFactor.setCurrentIndex(0)
849
850	# Reset parameters to fit
851	self.parameters_to_fit = None
852	self.has_error_column = False
853	self.has_poly_error_column = False
854
855	self.respondToModelStructure(model=model, structure_factor=None)
856
857	def onSelectBatchFilename(self, data_index):
858	"""
859	Update the logic based on the selected file in batch fitting
860	"""
861	self._index = self.all_data[data_index]
862	self.logic.data = GuiUtils.dataFromItem(self.all_data[data_index])
863	self.updateQRange()
864
865	def onSelectStructureFactor(self):
866	"""
867	Select Structure Factor from list
868	"""
869	model = str(self.cbModel.currentText())
870	category = str(self.cbCategory.currentText())
871	structure = str(self.cbStructureFactor.currentText())
872	if category == CATEGORY_STRUCTURE:
873	model = None
874	self.respondToModelStructure(model=model, structure_factor=structure)
875
876	def replaceConstraintName(self, old_name, new_name=""):
877	"""
878	Replace names of models in defined constraints
879	"""
880	param_number = self._model_model.rowCount()
881	# loop over parameters
882	for row in range(param_number):
883	if self.rowHasConstraint(row):
884	func = self._model_model.item(row, 1).child(0).data().func
885	if old_name in func:
886	new_func = func.replace(old_name, new_name)
887	self._model_model.item(row, 1).child(0).data().func = new_func
888
889	def updateData(self):
890	"""
891	Helper function for recalculation of data used in plotting
892	"""
893	# Update the chart
894	if self.data_is_loaded:
895	self.cmdPlot.setText("Show Plot")
896	self.calculateQGridForModel()
897	else:
898	self.cmdPlot.setText("Calculate")
899	# Create default datasets if no data passed
900	self.createDefaultDataset()
901
902	def respondToModelStructure(self, model=None, structure_factor=None):
903	# Set enablement on calculate/plot
904	self.cmdPlot.setEnabled(True)
905
906	# kernel parameters -> model_model
907	self.SASModelToQModel(model, structure_factor)
908
909	# Update plot
910	self.updateData()
911
912	# Update state stack
913	self.updateUndo()
914
915	# Let others know
916	self.newModelSignal.emit()
917
918	def onSelectCategory(self):
919	"""
920	Select Category from list
921	"""
922	category = self.cbCategory.currentText()
923	# Check if the user chose "Choose category entry"
924	if category == CATEGORY_DEFAULT:
925	# if the previous category was not the default, keep it.
926	# Otherwise, just return
927	if self._previous_category_index != 0:
928	# We need to block signals, or else state changes on perceived unchanged conditions
929	self.cbCategory.blockSignals(True)
930	self.cbCategory.setCurrentIndex(self._previous_category_index)
931	self.cbCategory.blockSignals(False)
932	return
933
934	if category == CATEGORY_STRUCTURE:
935	self.disableModelCombo()
936	self.enableStructureCombo()
937	self._model_model.clear()
938	return
939
940	# Safely clear and enable the model combo
941	self.cbModel.blockSignals(True)
942	self.cbModel.clear()
943	self.cbModel.blockSignals(False)
944	self.enableModelCombo()
945	self.disableStructureCombo()
946
947	self._previous_category_index = self.cbCategory.currentIndex()
948	# Retrieve the list of models
949	model_list = self.master_category_dict[category]
950	# Populate the models combobox
951	self.cbModel.addItems(sorted([model for (model, _) in model_list]))
952
953	def onPolyModelChange(self, item):
954	"""
955	Callback method for updating the main model and sasmodel
956	parameters with the GUI values in the polydispersity view
957	"""
958	model_column = item.column()
959	model_row = item.row()
960	name_index = self._poly_model.index(model_row, 0)
961	parameter_name = str(name_index.data()).lower() # "distribution of sld" etc.
962	if "distribution of" in parameter_name:
963	# just the last word
964	parameter_name = parameter_name.rsplit()[-1]
965
966	# Extract changed value.
967	if model_column == self.lstPoly.itemDelegate().poly_parameter:
968	# Is the parameter checked for fitting?
969	value = item.checkState()
970	parameter_name = parameter_name + '.width'
971	if value == QtCore.Qt.Checked:
972	self.parameters_to_fit.append(parameter_name)
973	else:
974	if parameter_name in self.parameters_to_fit:
975	self.parameters_to_fit.remove(parameter_name)
976	self.cmdFit.setEnabled(self.parameters_to_fit != [] and self.logic.data_is_loaded)
977	return
978	elif model_column in [self.lstPoly.itemDelegate().poly_min, self.lstPoly.itemDelegate().poly_max]:
979	try:
980	value = GuiUtils.toDouble(item.text())
981	except TypeError:
982	# Can't be converted properly, bring back the old value and exit
983	return
984
985	current_details = self.kernel_module.details[parameter_name]
986	current_details[model_column-1] = value
987	elif model_column == self.lstPoly.itemDelegate().poly_function:
988	# name of the function - just pass
989	return
990	else:
991	try:
992	value = GuiUtils.toDouble(item.text())
993	except TypeError:
994	# Can't be converted properly, bring back the old value and exit
995	return
996
997	# Update the sasmodel
998	# PD[ratio] -> width, npts -> npts, nsigs -> nsigmas
999	self.kernel_module.setParam(parameter_name + '.' + \
1000	self.lstPoly.itemDelegate().columnDict()[model_column], value)
1001
1002	# Update plot
1003	self.updateData()
1004
1005	def onMagnetModelChange(self, item):
1006	"""
1007	Callback method for updating the sasmodel magnetic parameters with the GUI values
1008	"""
1009	model_column = item.column()
1010	model_row = item.row()
1011	name_index = self._magnet_model.index(model_row, 0)
1012	parameter_name = str(self._magnet_model.data(name_index))
1013
1014	if model_column == 0:
1015	value = item.checkState()
1016	if value == QtCore.Qt.Checked:
1017	self.parameters_to_fit.append(parameter_name)
1018	else:
1019	if parameter_name in self.parameters_to_fit:
1020	self.parameters_to_fit.remove(parameter_name)
1021	self.cmdFit.setEnabled(self.parameters_to_fit != [] and self.logic.data_is_loaded)
1022	# Update state stack
1023	self.updateUndo()
1024	return
1025
1026	# Extract changed value.
1027	try:
1028	value = GuiUtils.toDouble(item.text())
1029	except TypeError:
1030	# Unparsable field
1031	return
1032
1033	property_index = self._magnet_model.headerData(1, model_column)-1 # Value, min, max, etc.
1034
1035	# Update the parameter value - note: this supports +/-inf as well
1036	self.kernel_module.params[parameter_name] = value
1037
1038	# min/max to be changed in self.kernel_module.details[parameter_name] = ['Ang', 0.0, inf]
1039	self.kernel_module.details[parameter_name][property_index] = value
1040
1041	# Force the chart update when actual parameters changed
1042	if model_column == 1:
1043	self.recalculatePlotData()
1044
1045	# Update state stack
1046	self.updateUndo()
1047
1048	def onHelp(self):
1049	"""
1050	Show the "Fitting" section of help
1051	"""
1052	tree_location = "/user/sasgui/perspectives/fitting/"
1053
1054	# Actual file will depend on the current tab
1055	tab_id = self.tabFitting.currentIndex()
1056	helpfile = "fitting.html"
1057	if tab_id == 0:
1058	helpfile = "fitting_help.html"
1059	elif tab_id == 1:
1060	helpfile = "residuals_help.html"
1061	elif tab_id == 2:
1062	helpfile = "resolution.html"
1063	elif tab_id == 3:
1064	helpfile = "pd/polydispersity.html"
1065	elif tab_id == 4:
1066	helpfile = "magnetism/magnetism.html"
1067	help_location = tree_location + helpfile
1068
1069	self.showHelp(help_location)
1070
1071	def showHelp(self, url):
1072	"""
1073	Calls parent's method for opening an HTML page
1074	"""
1075	self.parent.showHelp(url)
1076
1077	def onDisplayMagneticAngles(self):
1078	"""
1079	Display a simple image showing direction of magnetic angles
1080	"""
1081	self.magneticAnglesWidget.show()
1082
1083	def onFit(self):
1084	"""
1085	Perform fitting on the current data
1086	"""
1087	# initialize fitter constants
1088	fit_id = 0
1089	handler = None
1090	batch_inputs = {}
1091	batch_outputs = {}
1092	#---------------------------------
1093	if LocalConfig.USING_TWISTED:
1094	handler = None
1095	updater = None
1096	else:
1097	handler = ConsoleUpdate(parent=self.parent,
1098	manager=self,
1099	improvement_delta=0.1)
1100	updater = handler.update_fit
1101
1102	# Prepare the fitter object
1103	try:
1104	fitters, _ = self.prepareFitters()
1105	except ValueError as ex:
1106	# This should not happen! GUI explicitly forbids this situation
1107	self.communicate.statusBarUpdateSignal.emit('Fitting attempt without parameters.')
1108	return
1109
1110	# Create the fitting thread, based on the fitter
1111	completefn = self.batchFitComplete if self.is_batch_fitting else self.fitComplete
1112
1113	calc_fit = FitThread(handler=handler,
1114	fn=fitters,
1115	batch_inputs=batch_inputs,
1116	batch_outputs=batch_outputs,
1117	page_id=[[self.page_id]],
1118	updatefn=updater,
1119	completefn=completefn)
1120
1121	if LocalConfig.USING_TWISTED:
1122	# start the trhrhread with twisted
1123	calc_thread = threads.deferToThread(calc_fit.compute)
1124	calc_thread.addCallback(completefn)
1125	calc_thread.addErrback(self.fitFailed)
1126	else:
1127	# Use the old python threads + Queue
1128	calc_fit.queue()
1129	calc_fit.ready(2.5)
1130
1131	self.communicate.statusBarUpdateSignal.emit('Fitting started...')
1132	# Disable some elements
1133	self.setFittingStarted()
1134
1135	def updateFit(self):
1136	"""
1137	"""
1138	print("UPDATE FIT")
1139	pass
1140
1141	def fitFailed(self, reason):
1142	"""
1143	"""
1144	print("FIT FAILED: ", reason)
1145	pass
1146
1147	def batchFitComplete(self, result):
1148	"""
1149	Receive and display batch fitting results
1150	"""
1151	#re-enable the Fit button
1152	self.setFittingStopped()
1153
1154	def fitComplete(self, result):
1155	"""
1156	Receive and display fitting results
1157	"result" is a tuple of actual result list and the fit time in seconds
1158	"""
1159	#re-enable the Fit button
1160	self.setFittingStopped()
1161
1162	if result is None:
1163	msg = "Fitting failed after: %s s.\n" % GuiUtils.formatNumber(elapsed)
1164	self.communicate.statusBarUpdateSignal.emit(msg)
1165	return
1166
1167	res_list = result[0][0]
1168	res = res_list[0]
1169	if res.fitness is None or \
1170	not np.isfinite(res.fitness) or \
1171	np.any(res.pvec is None) or \
1172	not np.all(np.isfinite(res.pvec)):
1173	msg = "Fitting did not converge!"
1174	self.communicate.statusBarUpdateSignal.emit(msg)
1175	logging.error(msg)
1176	return
1177
1178	elapsed = result[1]
1179	msg = "Fitting completed successfully in: %s s.\n" % GuiUtils.formatNumber(elapsed)
1180	self.communicate.statusBarUpdateSignal.emit(msg)
1181
1182	self.chi2 = res.fitness
1183	param_list = res.param_list # ['radius', 'radius.width']
1184	param_values = res.pvec # array([ 0.36221662, 0.0146783 ])
1185	param_stderr = res.stderr # array([ 1.71293015, 1.71294233])
1186	params_and_errors = list(zip(param_values, param_stderr))
1187	param_dict = dict(zip(param_list, params_and_errors))
1188
1189	# Dictionary of fitted parameter: value, error
1190	# e.g. param_dic = {"sld":(1.703, 0.0034), "length":(33.455, -0.0983)}
1191	self.updateModelFromList(param_dict)
1192
1193	self.updatePolyModelFromList(param_dict)
1194
1195	self.updateMagnetModelFromList(param_dict)
1196
1197	# update charts
1198	self.onPlot()
1199
1200	# Read only value - we can get away by just printing it here
1201	chi2_repr = GuiUtils.formatNumber(self.chi2, high=True)
1202	self.lblChi2Value.setText(chi2_repr)
1203
1204	def prepareFitters(self, fitter=None, fit_id=0):
1205	"""
1206	Prepare the Fitter object for use in fitting
1207	"""
1208	# fitter = None -> single/batch fitting
1209	# fitter = Fit() -> simultaneous fitting
1210
1211	# Data going in
1212	data = self.logic.data
1213	model = self.kernel_module
1214	qmin = self.q_range_min
1215	qmax = self.q_range_max
1216	params_to_fit = self.parameters_to_fit
1217	if (not params_to_fit):
1218	raise ValueError('Fitting requires at least one parameter to optimize.')
1219
1220	# Potential weights added directly to data
1221	self.addWeightingToData(data)
1222
1223	# Potential smearing added
1224	# Remember that smearing_min/max can be None ->
1225	# deal with it until Python gets discriminated unions
1226	smearing, accuracy, smearing_min, smearing_max = self.smearing_widget.state()
1227
1228	constraints = self.getComplexConstraintsForModel()
1229	smearer = None
1230	handler = None
1231	batch_inputs = {}
1232	batch_outputs = {}
1233
1234	fitters = []
1235	for fit_index in self.all_data:
1236	fitter_single = Fit() if fitter is None else fitter
1237	data = GuiUtils.dataFromItem(fit_index)
1238	try:
1239	fitter_single.set_model(model, fit_id, params_to_fit, data=data,
1240	constraints=constraints)
1241	except ValueError as ex:
1242	logging.error("Setting model parameters failed with: %s" % ex)
1243	return
1244
1245	qmin, qmax, _ = self.logic.computeRangeFromData(data)
1246	fitter_single.set_data(data=data, id=fit_id, smearer=smearer, qmin=qmin,
1247	qmax=qmax)
1248	fitter_single.select_problem_for_fit(id=fit_id, value=1)
1249	if fitter is None:
1250	# Assign id to the new fitter only
1251	fitter_single.fitter_id = [self.page_id]
1252	fit_id += 1
1253	fitters.append(fitter_single)
1254
1255	return fitters, fit_id
1256
1257	def iterateOverModel(self, func):
1258	"""
1259	Take func and throw it inside the model row loop
1260	"""
1261	for row_i in range(self._model_model.rowCount()):
1262	func(row_i)
1263
1264	def updateModelFromList(self, param_dict):
1265	"""
1266	Update the model with new parameters, create the errors column
1267	"""
1268	assert isinstance(param_dict, dict)
1269	if not dict:
1270	return
1271
1272	def updateFittedValues(row):
1273	# Utility function for main model update
1274	# internal so can use closure for param_dict
1275	param_name = str(self._model_model.item(row, 0).text())
1276	if param_name not in list(param_dict.keys()):
1277	return
1278	# modify the param value
1279	param_repr = GuiUtils.formatNumber(param_dict[param_name][0], high=True)
1280	self._model_model.item(row, 1).setText(param_repr)
1281	if self.has_error_column:
1282	error_repr = GuiUtils.formatNumber(param_dict[param_name][1], high=True)
1283	self._model_model.item(row, 2).setText(error_repr)
1284
1285	def updatePolyValues(row):
1286	# Utility function for updateof polydispersity part of the main model
1287	param_name = str(self._model_model.item(row, 0).text())+'.width'
1288	if param_name not in list(param_dict.keys()):
1289	return
1290	# modify the param value
1291	param_repr = GuiUtils.formatNumber(param_dict[param_name][0], high=True)
1292	self._model_model.item(row, 0).child(0).child(0,1).setText(param_repr)
1293
1294	def createErrorColumn(row):
1295	# Utility function for error column update
1296	item = QtGui.QStandardItem()
1297	def createItem(param_name):
1298	error_repr = GuiUtils.formatNumber(param_dict[param_name][1], high=True)
1299	item.setText(error_repr)
1300	def curr_param():
1301	return str(self._model_model.item(row, 0).text())
1302
1303	[createItem(param_name) for param_name in list(param_dict.keys()) if curr_param() == param_name]
1304
1305	error_column.append(item)
1306
1307	# block signals temporarily, so we don't end up
1308	# updating charts with every single model change on the end of fitting
1309	self._model_model.blockSignals(True)
1310	self.iterateOverModel(updateFittedValues)
1311	self.iterateOverModel(updatePolyValues)
1312	self._model_model.blockSignals(False)
1313
1314	if self.has_error_column:
1315	return
1316
1317	error_column = []
1318	self.lstParams.itemDelegate().addErrorColumn()
1319	self.iterateOverModel(createErrorColumn)
1320
1321	# switch off reponse to model change
1322	self._model_model.blockSignals(True)
1323	self._model_model.insertColumn(2, error_column)
1324	self._model_model.blockSignals(False)
1325	FittingUtilities.addErrorHeadersToModel(self._model_model)
1326	# Adjust the table cells width.
1327	# TODO: find a way to dynamically adjust column width while resized expanding
1328	self.lstParams.resizeColumnToContents(0)
1329	self.lstParams.resizeColumnToContents(4)
1330	self.lstParams.resizeColumnToContents(5)
1331	self.lstParams.setSizePolicy(QtWidgets.QSizePolicy.MinimumExpanding, QtWidgets.QSizePolicy.Expanding)
1332
1333	self.has_error_column = True
1334
1335	def updatePolyModelFromList(self, param_dict):
1336	"""
1337	Update the polydispersity model with new parameters, create the errors column
1338	"""
1339	assert isinstance(param_dict, dict)
1340	if not dict:
1341	return
1342
1343	def iterateOverPolyModel(func):
1344	"""
1345	Take func and throw it inside the poly model row loop
1346	"""
1347	for row_i in range(self._poly_model.rowCount()):
1348	func(row_i)
1349
1350	def updateFittedValues(row_i):
1351	# Utility function for main model update
1352	# internal so can use closure for param_dict
1353	if row_i >= self._poly_model.rowCount():
1354	return
1355	param_name = str(self._poly_model.item(row_i, 0).text()).rsplit()[-1] + '.width'
1356	if param_name not in list(param_dict.keys()):
1357	return
1358	# modify the param value
1359	param_repr = GuiUtils.formatNumber(param_dict[param_name][0], high=True)
1360	self._poly_model.item(row_i, 1).setText(param_repr)
1361	if self.has_poly_error_column:
1362	error_repr = GuiUtils.formatNumber(param_dict[param_name][1], high=True)
1363	self._poly_model.item(row_i, 2).setText(error_repr)
1364
1365
1366	def createErrorColumn(row_i):
1367	# Utility function for error column update
1368	if row_i >= self._poly_model.rowCount():
1369	return
1370	item = QtGui.QStandardItem()
1371
1372	def createItem(param_name):
1373	error_repr = GuiUtils.formatNumber(param_dict[param_name][1], high=True)
1374	item.setText(error_repr)
1375
1376	def poly_param():
1377	return str(self._poly_model.item(row_i, 0).text()).rsplit()[-1] + '.width'
1378
1379	[createItem(param_name) for param_name in list(param_dict.keys()) if poly_param() == param_name]
1380
1381	error_column.append(item)
1382
1383	# block signals temporarily, so we don't end up
1384	# updating charts with every single model change on the end of fitting
1385	self._poly_model.blockSignals(True)
1386	iterateOverPolyModel(updateFittedValues)
1387	self._poly_model.blockSignals(False)
1388
1389	if self.has_poly_error_column:
1390	return
1391
1392	self.lstPoly.itemDelegate().addErrorColumn()
1393	error_column = []
1394	iterateOverPolyModel(createErrorColumn)
1395
1396	# switch off reponse to model change
1397	self._poly_model.blockSignals(True)
1398	self._poly_model.insertColumn(2, error_column)
1399	self._poly_model.blockSignals(False)
1400	FittingUtilities.addErrorPolyHeadersToModel(self._poly_model)
1401
1402	self.has_poly_error_column = True
1403
1404	def updateMagnetModelFromList(self, param_dict):
1405	"""
1406	Update the magnetic model with new parameters, create the errors column
1407	"""
1408	assert isinstance(param_dict, dict)
1409	if not dict:
1410	return
1411	if self._model_model.rowCount() == 0:
1412	return
1413
1414	def iterateOverMagnetModel(func):
1415	"""
1416	Take func and throw it inside the magnet model row loop
1417	"""
1418	for row_i in range(self._model_model.rowCount()):
1419	func(row_i)
1420
1421	def updateFittedValues(row):
1422	# Utility function for main model update
1423	# internal so can use closure for param_dict
1424	if self._magnet_model.item(row, 0) is None:
1425	return
1426	param_name = str(self._magnet_model.item(row, 0).text())
1427	if param_name not in list(param_dict.keys()):
1428	return
1429	# modify the param value
1430	param_repr = GuiUtils.formatNumber(param_dict[param_name][0], high=True)
1431	self._magnet_model.item(row, 1).setText(param_repr)
1432	if self.has_magnet_error_column:
1433	error_repr = GuiUtils.formatNumber(param_dict[param_name][1], high=True)
1434	self._magnet_model.item(row, 2).setText(error_repr)
1435
1436	def createErrorColumn(row):
1437	# Utility function for error column update
1438	item = QtGui.QStandardItem()
1439	def createItem(param_name):
1440	error_repr = GuiUtils.formatNumber(param_dict[param_name][1], high=True)
1441	item.setText(error_repr)
1442	def curr_param():
1443	return str(self._magnet_model.item(row, 0).text())
1444
1445	[createItem(param_name) for param_name in list(param_dict.keys()) if curr_param() == param_name]
1446
1447	error_column.append(item)
1448
1449	# block signals temporarily, so we don't end up
1450	# updating charts with every single model change on the end of fitting
1451	self._magnet_model.blockSignals(True)
1452	iterateOverMagnetModel(updateFittedValues)
1453	self._magnet_model.blockSignals(False)
1454
1455	if self.has_magnet_error_column:
1456	return
1457
1458	self.lstMagnetic.itemDelegate().addErrorColumn()
1459	error_column = []
1460	iterateOverMagnetModel(createErrorColumn)
1461
1462	# switch off reponse to model change
1463	self._magnet_model.blockSignals(True)
1464	self._magnet_model.insertColumn(2, error_column)
1465	self._magnet_model.blockSignals(False)
1466	FittingUtilities.addErrorHeadersToModel(self._magnet_model)
1467
1468	self.has_magnet_error_column = True
1469
1470	def onPlot(self):
1471	"""
1472	Plot the current set of data
1473	"""
1474	# Regardless of previous state, this should now be `plot show` functionality only
1475	self.cmdPlot.setText("Show Plot")
1476	# Force data recalculation so existing charts are updated
1477	self.recalculatePlotData()
1478	self.showPlot()
1479
1480	def recalculatePlotData(self):
1481	"""
1482	Generate a new dataset for model
1483	"""
1484	if not self.data_is_loaded:
1485	self.createDefaultDataset()
1486	self.calculateQGridForModel()
1487
1488	def showPlot(self):
1489	"""
1490	Show the current plot in MPL
1491	"""
1492	# Show the chart if ready
1493	data_to_show = self.data if self.data_is_loaded else self.model_data
1494	if data_to_show is not None:
1495	self.communicate.plotRequestedSignal.emit([data_to_show])
1496
1497	def onOptionsUpdate(self):
1498	"""
1499	Update local option values and replot
1500	"""
1501	self.q_range_min, self.q_range_max, self.npts, self.log_points, self.weighting = \
1502	self.options_widget.state()
1503	# set Q range labels on the main tab
1504	self.lblMinRangeDef.setText(str(self.q_range_min))
1505	self.lblMaxRangeDef.setText(str(self.q_range_max))
1506	self.recalculatePlotData()
1507
1508	def setDefaultStructureCombo(self):
1509	"""
1510	Fill in the structure factors combo box with defaults
1511	"""
1512	structure_factor_list = self.master_category_dict.pop(CATEGORY_STRUCTURE)
1513	factors = [factor[0] for factor in structure_factor_list]
1514	factors.insert(0, STRUCTURE_DEFAULT)
1515	self.cbStructureFactor.clear()
1516	self.cbStructureFactor.addItems(sorted(factors))
1517
1518	def createDefaultDataset(self):
1519	"""
1520	Generate default Dataset 1D/2D for the given model
1521	"""
1522	# Create default datasets if no data passed
1523	if self.is2D:
1524	qmax = self.q_range_max/np.sqrt(2)
1525	qstep = self.npts
1526	self.logic.createDefault2dData(qmax, qstep, self.tab_id)
1527	return
1528	elif self.log_points:
1529	qmin = -10.0 if self.q_range_min < 1.e-10 else np.log10(self.q_range_min)
1530	qmax = 10.0 if self.q_range_max > 1.e10 else np.log10(self.q_range_max)
1531	interval = np.logspace(start=qmin, stop=qmax, num=self.npts, endpoint=True, base=10.0)
1532	else:
1533	interval = np.linspace(start=self.q_range_min, stop=self.q_range_max,
1534	num=self.npts, endpoint=True)
1535	self.logic.createDefault1dData(interval, self.tab_id)
1536
1537	def readCategoryInfo(self):
1538	"""
1539	Reads the categories in from file
1540	"""
1541	self.master_category_dict = defaultdict(list)
1542	self.by_model_dict = defaultdict(list)
1543	self.model_enabled_dict = defaultdict(bool)
1544
1545	categorization_file = CategoryInstaller.get_user_file()
1546	if not os.path.isfile(categorization_file):
1547	categorization_file = CategoryInstaller.get_default_file()
1548	with open(categorization_file, 'rb') as cat_file:
1549	self.master_category_dict = json.load(cat_file)
1550	self.regenerateModelDict()
1551
1552	# Load the model dict
1553	models = load_standard_models()
1554	for model in models:
1555	self.models[model.name] = model
1556
1557	def regenerateModelDict(self):
1558	"""
1559	Regenerates self.by_model_dict which has each model name as the
1560	key and the list of categories belonging to that model
1561	along with the enabled mapping
1562	"""
1563	self.by_model_dict = defaultdict(list)
1564	for category in self.master_category_dict:
1565	for (model, enabled) in self.master_category_dict[category]:
1566	self.by_model_dict[model].append(category)
1567	self.model_enabled_dict[model] = enabled
1568
1569	def addBackgroundToModel(self, model):
1570	"""
1571	Adds background parameter with default values to the model
1572	"""
1573	assert isinstance(model, QtGui.QStandardItemModel)
1574	checked_list = ['background', '0.001', '-inf', 'inf', '1/cm']
1575	FittingUtilities.addCheckedListToModel(model, checked_list)
1576	last_row = model.rowCount()-1
1577	model.item(last_row, 0).setEditable(False)
1578	model.item(last_row, 4).setEditable(False)
1579
1580	def addScaleToModel(self, model):
1581	"""
1582	Adds scale parameter with default values to the model
1583	"""
1584	assert isinstance(model, QtGui.QStandardItemModel)
1585	checked_list = ['scale', '1.0', '0.0', 'inf', '']
1586	FittingUtilities.addCheckedListToModel(model, checked_list)
1587	last_row = model.rowCount()-1
1588	model.item(last_row, 0).setEditable(False)
1589	model.item(last_row, 4).setEditable(False)
1590
1591	def addWeightingToData(self, data):
1592	"""
1593	Adds weighting contribution to fitting data
1594	"""
1595	# Send original data for weighting
1596	weight = FittingUtilities.getWeight(data=data, is2d=self.is2D, flag=self.weighting)
1597	update_module = data.err_data if self.is2D else data.dy
1598	# Overwrite relevant values in data
1599	update_module = weight
1600
1601	def updateQRange(self):
1602	"""
1603	Updates Q Range display
1604	"""
1605	if self.data_is_loaded:
1606	self.q_range_min, self.q_range_max, self.npts = self.logic.computeDataRange()
1607	# set Q range labels on the main tab
1608	self.lblMinRangeDef.setText(str(self.q_range_min))
1609	self.lblMaxRangeDef.setText(str(self.q_range_max))
1610	# set Q range labels on the options tab
1611	self.options_widget.updateQRange(self.q_range_min, self.q_range_max, self.npts)
1612
1613	def SASModelToQModel(self, model_name, structure_factor=None):
1614	"""
1615	Setting model parameters into table based on selected category
1616	"""
1617	# Crete/overwrite model items
1618	self._model_model.clear()
1619
1620	# First, add parameters from the main model
1621	if model_name is not None:
1622	self.fromModelToQModel(model_name)
1623
1624	# Then, add structure factor derived parameters
1625	if structure_factor is not None and structure_factor != "None":
1626	if model_name is None:
1627	# Instantiate the current sasmodel for SF-only models
1628	self.kernel_module = self.models[structure_factor]()
1629	self.fromStructureFactorToQModel(structure_factor)
1630	else:
1631	# Allow the SF combobox visibility for the given sasmodel
1632	self.enableStructureFactorControl(structure_factor)
1633
1634	# Then, add multishells
1635	if model_name is not None:
1636	# Multishell models need additional treatment
1637	self.addExtraShells()
1638
1639	# Add polydispersity to the model
1640	self.setPolyModel()
1641	# Add magnetic parameters to the model
1642	self.setMagneticModel()
1643
1644	# Adjust the table cells width
1645	self.lstParams.resizeColumnToContents(0)
1646	self.lstParams.setSizePolicy(QtWidgets.QSizePolicy.MinimumExpanding, QtWidgets.QSizePolicy.Expanding)
1647
1648	# Now we claim the model has been loaded
1649	self.model_is_loaded = True
1650	# Change the model name to a monicker
1651	self.kernel_module.name = self.modelName()
1652
1653	# (Re)-create headers
1654	FittingUtilities.addHeadersToModel(self._model_model)
1655	self.lstParams.header().setFont(self.boldFont)
1656
1657	# Update Q Ranges
1658	self.updateQRange()
1659
1660	def fromModelToQModel(self, model_name):
1661	"""
1662	Setting model parameters into QStandardItemModel based on selected _model_
1663	"""
1664	kernel_module = generate.load_kernel_module(model_name)
1665	self.model_parameters = modelinfo.make_parameter_table(getattr(kernel_module, 'parameters', []))
1666
1667	# Instantiate the current sasmodel
1668	self.kernel_module = self.models[model_name]()
1669
1670	# Explicitly add scale and background with default values
1671	temp_undo_state = self.undo_supported
1672	self.undo_supported = False
1673	self.addScaleToModel(self._model_model)
1674	self.addBackgroundToModel(self._model_model)
1675	self.undo_supported = temp_undo_state
1676
1677	self.shell_names = self.shellNamesList()
1678
1679	# Update the QModel
1680	new_rows = FittingUtilities.addParametersToModel(self.model_parameters, self.kernel_module, self.is2D)
1681
1682	for row in new_rows:
1683	self._model_model.appendRow(row)
1684	# Update the counter used for multishell display
1685	self._last_model_row = self._model_model.rowCount()
1686
1687	def fromStructureFactorToQModel(self, structure_factor):
1688	"""
1689	Setting model parameters into QStandardItemModel based on selected _structure factor_
1690	"""
1691	structure_module = generate.load_kernel_module(structure_factor)
1692	structure_parameters = modelinfo.make_parameter_table(getattr(structure_module, 'parameters', []))
1693	structure_kernel = self.models[structure_factor]()
1694
1695	self.kernel_module._model_info = product.make_product_info(self.kernel_module._model_info, structure_kernel._model_info)
1696
1697	new_rows = FittingUtilities.addSimpleParametersToModel(structure_parameters, self.is2D)
1698	for row in new_rows:
1699	self._model_model.appendRow(row)
1700	# Update the counter used for multishell display
1701	self._last_model_row = self._model_model.rowCount()
1702
1703	def onMainParamsChange(self, item):
1704	"""
1705	Callback method for updating the sasmodel parameters with the GUI values
1706	"""
1707	model_column = item.column()
1708
1709	if model_column == 0:
1710	self.checkboxSelected(item)
1711	self.cmdFit.setEnabled(self.parameters_to_fit != [] and self.logic.data_is_loaded)
1712	# Update state stack
1713	self.updateUndo()
1714	return
1715
1716	model_row = item.row()
1717	name_index = self._model_model.index(model_row, 0)
1718
1719	# Extract changed value.
1720	try:
1721	value = GuiUtils.toDouble(item.text())
1722	except TypeError:
1723	# Unparsable field
1724	return
1725
1726	parameter_name = str(self._model_model.data(name_index)) # sld, background etc.
1727
1728	# Update the parameter value - note: this supports +/-inf as well
1729	self.kernel_module.params[parameter_name] = value
1730
1731	# Update the parameter value - note: this supports +/-inf as well
1732	param_column = self.lstParams.itemDelegate().param_value
1733	min_column = self.lstParams.itemDelegate().param_min
1734	max_column = self.lstParams.itemDelegate().param_max
1735	if model_column == param_column:
1736	self.kernel_module.setParam(parameter_name, value)
1737	elif model_column == min_column:
1738	# min/max to be changed in self.kernel_module.details[parameter_name] = ['Ang', 0.0, inf]
1739	self.kernel_module.details[parameter_name][1] = value
1740	elif model_column == max_column:
1741	self.kernel_module.details[parameter_name][2] = value
1742	else:
1743	# don't update the chart
1744	return
1745
1746	# TODO: magnetic params in self.kernel_module.details['M0:parameter_name'] = value
1747	# TODO: multishell params in self.kernel_module.details[??] = value
1748
1749	# Force the chart update when actual parameters changed
1750	if model_column == 1:
1751	self.recalculatePlotData()
1752
1753	# Update state stack
1754	self.updateUndo()
1755
1756	def isCheckable(self, row):
1757	return self._model_model.item(row, 0).isCheckable()
1758
1759	def checkboxSelected(self, item):
1760	# Assure we're dealing with checkboxes
1761	if not item.isCheckable():
1762	return
1763	status = item.checkState()
1764
1765	# If multiple rows selected - toggle all of them, filtering uncheckable
1766	# Switch off signaling from the model to avoid recursion
1767	self._model_model.blockSignals(True)
1768	# Convert to proper indices and set requested enablement
1769	self.setParameterSelection(status)
1770	#[self._model_model.item(row, 0).setCheckState(status) for row in self.selectedParameters()]
1771	self._model_model.blockSignals(False)
1772
1773	# update the list of parameters to fit
1774	main_params = self.checkedListFromModel(self._model_model)
1775	poly_params = self.checkedListFromModel(self._poly_model)
1776	magnet_params = self.checkedListFromModel(self._magnet_model)
1777
1778	# Retrieve poly params names
1779	poly_params = [param.rsplit()[-1] + '.width' for param in poly_params]
1780
1781	self.parameters_to_fit = main_params + poly_params + magnet_params
1782
1783	def checkedListFromModel(self, model):
1784	"""
1785	Returns list of checked parameters for given model
1786	"""
1787	def isChecked(row):
1788	return model.item(row, 0).checkState() == QtCore.Qt.Checked
1789
1790	return [str(model.item(row_index, 0).text())
1791	for row_index in range(model.rowCount())
1792	if isChecked(row_index)]
1793
1794	def createNewIndex(self, fitted_data):
1795	"""
1796	Create a model or theory index with passed Data1D/Data2D
1797	"""
1798	if self.data_is_loaded:
1799	if not fitted_data.name:
1800	name = self.nameForFittedData(self.data.filename)
1801	fitted_data.title = name
1802	fitted_data.name = name
1803	fitted_data.filename = name
1804	fitted_data.symbol = "Line"
1805	self.updateModelIndex(fitted_data)
1806	else:
1807	name = self.nameForFittedData(self.kernel_module.name)
1808	fitted_data.title = name
1809	fitted_data.name = name
1810	fitted_data.filename = name
1811	fitted_data.symbol = "Line"
1812	self.createTheoryIndex(fitted_data)
1813
1814	def updateModelIndex(self, fitted_data):
1815	"""
1816	Update a QStandardModelIndex containing model data
1817	"""
1818	name = self.nameFromData(fitted_data)
1819	# Make this a line if no other defined
1820	if hasattr(fitted_data, 'symbol') and fitted_data.symbol is None:
1821	fitted_data.symbol = 'Line'
1822	# Notify the GUI manager so it can update the main model in DataExplorer
1823	GuiUtils.updateModelItemWithPlot(self._index, fitted_data, name)
1824
1825	def createTheoryIndex(self, fitted_data):
1826	"""
1827	Create a QStandardModelIndex containing model data
1828	"""
1829	name = self.nameFromData(fitted_data)
1830	# Notify the GUI manager so it can create the theory model in DataExplorer
1831	new_item = GuiUtils.createModelItemWithPlot(fitted_data, name=name)
1832	self.communicate.updateTheoryFromPerspectiveSignal.emit(new_item)
1833
1834	def nameFromData(self, fitted_data):
1835	"""
1836	Return name for the dataset. Terribly impure function.
1837	"""
1838	if fitted_data.name is None:
1839	name = self.nameForFittedData(self.logic.data.filename)
1840	fitted_data.title = name
1841	fitted_data.name = name
1842	fitted_data.filename = name
1843	else:
1844	name = fitted_data.name
1845	return name
1846
1847	def methodCalculateForData(self):
1848	'''return the method for data calculation'''
1849	return Calc1D if isinstance(self.data, Data1D) else Calc2D
1850
1851	def methodCompleteForData(self):
1852	'''return the method for result parsin on calc complete '''
1853	return self.complete1D if isinstance(self.data, Data1D) else self.complete2D
1854
1855	def calculateQGridForModel(self):
1856	"""
1857	Prepare the fitting data object, based on current ModelModel
1858	"""
1859	if self.kernel_module is None:
1860	return
1861	# Awful API to a backend method.
1862	method = self.methodCalculateForData()(data=self.data,
1863	model=self.kernel_module,
1864	page_id=0,
1865	qmin=self.q_range_min,
1866	qmax=self.q_range_max,
1867	smearer=None,
1868	state=None,
1869	weight=None,
1870	fid=None,
1871	toggle_mode_on=False,
1872	completefn=None,
1873	update_chisqr=True,
1874	exception_handler=self.calcException,
1875	source=None)
1876
1877	calc_thread = threads.deferToThread(method.compute)
1878	calc_thread.addCallback(self.methodCompleteForData())
1879	calc_thread.addErrback(self.calculateDataFailed)
1880
1881	def calculateDataFailed(self, reason):
1882	"""
1883	Thread returned error
1884	"""
1885	print("Calculate Data failed with ", reason)
1886
1887	def complete1D(self, return_data):
1888	"""
1889	Plot the current 1D data
1890	"""
1891	fitted_data = self.logic.new1DPlot(return_data, self.tab_id)
1892	self.calculateResiduals(fitted_data)
1893	self.model_data = fitted_data
1894
1895	def complete2D(self, return_data):
1896	"""
1897	Plot the current 2D data
1898	"""
1899	fitted_data = self.logic.new2DPlot(return_data)
1900	self.calculateResiduals(fitted_data)
1901	self.model_data = fitted_data
1902
1903	def calculateResiduals(self, fitted_data):
1904	"""
1905	Calculate and print Chi2 and display chart of residuals
1906	"""
1907	# Create a new index for holding data
1908	fitted_data.symbol = "Line"
1909
1910	# Modify fitted_data with weighting
1911	self.addWeightingToData(fitted_data)
1912
1913	self.createNewIndex(fitted_data)
1914	# Calculate difference between return_data and logic.data
1915	self.chi2 = FittingUtilities.calculateChi2(fitted_data, self.logic.data)
1916	# Update the control
1917	chi2_repr = "---" if self.chi2 is None else GuiUtils.formatNumber(self.chi2, high=True)
1918	self.lblChi2Value.setText(chi2_repr)
1919
1920	self.communicate.plotUpdateSignal.emit([fitted_data])
1921
1922	# Plot residuals if actual data
1923	if not self.data_is_loaded:
1924	return
1925
1926	residuals_plot = FittingUtilities.plotResiduals(self.data, fitted_data)
1927	residuals_plot.id = "Residual " + residuals_plot.id
1928	self.createNewIndex(residuals_plot)
1929	#self.communicate.plotUpdateSignal.emit([residuals_plot])
1930
1931	def calcException(self, etype, value, tb):
1932	"""
1933	Thread threw an exception.
1934	"""
1935	# TODO: remimplement thread cancellation
1936	logging.error("".join(traceback.format_exception(etype, value, tb)))
1937
1938	def setTableProperties(self, table):
1939	"""
1940	Setting table properties
1941	"""
1942	# Table properties
1943	table.verticalHeader().setVisible(False)
1944	table.setAlternatingRowColors(True)
1945	table.setSizePolicy(QtWidgets.QSizePolicy.MinimumExpanding, QtWidgets.QSizePolicy.Expanding)
1946	table.setSelectionBehavior(QtWidgets.QAbstractItemView.SelectRows)
1947	table.resizeColumnsToContents()
1948
1949	# Header
1950	header = table.horizontalHeader()
1951	header.setSectionResizeMode(QtWidgets.QHeaderView.ResizeToContents)
1952	header.ResizeMode(QtWidgets.QHeaderView.Interactive)
1953
1954	# Qt5: the following 2 lines crash - figure out why!
1955	# Resize column 0 and 7 to content
1956	#header.setSectionResizeMode(0, QtWidgets.QHeaderView.ResizeToContents)
1957	#header.setSectionResizeMode(7, QtWidgets.QHeaderView.ResizeToContents)
1958
1959	def setPolyModel(self):
1960	"""
1961	Set polydispersity values
1962	"""
1963	if not self.model_parameters:
1964	return
1965	self._poly_model.clear()
1966
1967	[self.setPolyModelParameters(i, param) for i, param in \
1968	enumerate(self.model_parameters.form_volume_parameters) if param.polydisperse]
1969	FittingUtilities.addPolyHeadersToModel(self._poly_model)
1970
1971	def setPolyModelParameters(self, i, param):
1972	"""
1973	Standard of multishell poly parameter driver
1974	"""
1975	param_name = param.name
1976	# see it the parameter is multishell
1977	if '[' in param.name:
1978	# Skip empty shells
1979	if self.current_shell_displayed == 0:
1980	return
1981	else:
1982	# Create as many entries as current shells
1983	for ishell in range(1, self.current_shell_displayed+1):
1984	# Remove [n] and add the shell numeral
1985	name = param_name[0:param_name.index('[')] + str(ishell)
1986	self.addNameToPolyModel(i, name)
1987	else:
1988	# Just create a simple param entry
1989	self.addNameToPolyModel(i, param_name)
1990
1991	def addNameToPolyModel(self, i, param_name):
1992	"""
1993	Creates a checked row in the poly model with param_name
1994	"""
1995	# Polydisp. values from the sasmodel
1996	width = self.kernel_module.getParam(param_name + '.width')
1997	npts = self.kernel_module.getParam(param_name + '.npts')
1998	nsigs = self.kernel_module.getParam(param_name + '.nsigmas')
1999	_, min, max = self.kernel_module.details[param_name]
2000
2001	# Construct a row with polydisp. related variable.
2002	# This will get added to the polydisp. model
2003	# Note: last argument needs extra space padding for decent display of the control
2004	checked_list = ["Distribution of " + param_name, str(width),
2005	str(min), str(max),
2006	str(npts), str(nsigs), "gaussian ",'']
2007	FittingUtilities.addCheckedListToModel(self._poly_model, checked_list)
2008
2009	# All possible polydisp. functions as strings in combobox
2010	func = QtWidgets.QComboBox()
2011	func.addItems([str(name_disp) for name_disp in POLYDISPERSITY_MODELS.keys()])
2012	# Set the default index
2013	func.setCurrentIndex(func.findText(DEFAULT_POLYDISP_FUNCTION))
2014	ind = self._poly_model.index(i,self.lstPoly.itemDelegate().poly_function)
2015	self.lstPoly.setIndexWidget(ind, func)
2016	func.currentIndexChanged.connect(lambda: self.onPolyComboIndexChange(str(func.currentText()), i))
2017
2018	def onPolyFilenameChange(self, row_index):
2019	"""
2020	Respond to filename_updated signal from the delegate
2021	"""
2022	# For the given row, invoke the "array" combo handler
2023	array_caption = 'array'
2024
2025	# Get the combo box reference
2026	ind = self._poly_model.index(row_index, self.lstPoly.itemDelegate().poly_function)
2027	widget = self.lstPoly.indexWidget(ind)
2028
2029	# Update the combo box so it displays "array"
2030	widget.blockSignals(True)
2031	widget.setCurrentIndex(self.lstPoly.itemDelegate().POLYDISPERSE_FUNCTIONS.index(array_caption))
2032	widget.blockSignals(False)
2033
2034	# Invoke the file reader
2035	self.onPolyComboIndexChange(array_caption, row_index)
2036
2037	def onPolyComboIndexChange(self, combo_string, row_index):
2038	"""
2039	Modify polydisp. defaults on function choice
2040	"""
2041	# Get npts/nsigs for current selection
2042	param = self.model_parameters.form_volume_parameters[row_index]
2043	file_index = self._poly_model.index(row_index, self.lstPoly.itemDelegate().poly_function)
2044	combo_box = self.lstPoly.indexWidget(file_index)
2045
2046	def updateFunctionCaption(row):
2047	# Utility function for update of polydispersity function name in the main model
2048	param_name = str(self._model_model.item(row, 0).text())
2049	if param_name != param.name:
2050	return
2051	# Modify the param value
2052	self._model_model.item(row, 0).child(0).child(0,4).setText(combo_string)
2053
2054	if combo_string == 'array':
2055	try:
2056	self.loadPolydispArray(row_index)
2057	# Update main model for display
2058	self.iterateOverModel(updateFunctionCaption)
2059	# disable the row
2060	lo = self.lstPoly.itemDelegate().poly_pd
2061	hi = self.lstPoly.itemDelegate().poly_function
2062	[self._poly_model.item(row_index, i).setEnabled(False) for i in range(lo, hi)]
2063	return
2064	except IOError:
2065	combo_box.setCurrentIndex(self.orig_poly_index)
2066	# Pass for cancel/bad read
2067	pass
2068
2069	# Enable the row in case it was disabled by Array
2070	self._poly_model.blockSignals(True)
2071	max_range = self.lstPoly.itemDelegate().poly_filename
2072	[self._poly_model.item(row_index, i).setEnabled(True) for i in range(7)]
2073	file_index = self._poly_model.index(row_index, self.lstPoly.itemDelegate().poly_filename)
2074	self._poly_model.setData(file_index, "")
2075	self._poly_model.blockSignals(False)
2076
2077	npts_index = self._poly_model.index(row_index, self.lstPoly.itemDelegate().poly_npts)
2078	nsigs_index = self._poly_model.index(row_index, self.lstPoly.itemDelegate().poly_nsigs)
2079
2080	npts = POLYDISPERSITY_MODELS[str(combo_string)].default['npts']
2081	nsigs = POLYDISPERSITY_MODELS[str(combo_string)].default['nsigmas']
2082
2083	self._poly_model.setData(npts_index, npts)
2084	self._poly_model.setData(nsigs_index, nsigs)
2085
2086	self.iterateOverModel(updateFunctionCaption)
2087	self.orig_poly_index = combo_box.currentIndex()
2088
2089	def loadPolydispArray(self, row_index):
2090	"""
2091	Show the load file dialog and loads requested data into state
2092	"""
2093	datafile = QtWidgets.QFileDialog.getOpenFileName(
2094	self, "Choose a weight file", "", "All files (.)", None,
2095	QtWidgets.QFileDialog.DontUseNativeDialog)[0]
2096
2097	if not datafile:
2098	logging.info("No weight data chosen.")
2099	raise IOError
2100
2101	values = []
2102	weights = []
2103	def appendData(data_tuple):
2104	"""
2105	Fish out floats from a tuple of strings
2106	"""
2107	try:
2108	values.append(float(data_tuple[0]))
2109	weights.append(float(data_tuple[1]))
2110	except (ValueError, IndexError):
2111	# just pass through if line with bad data
2112	return
2113
2114	with open(datafile, 'r') as column_file:
2115	column_data = [line.rstrip().split() for line in column_file.readlines()]
2116	[appendData(line) for line in column_data]
2117
2118	# If everything went well - update the sasmodel values
2119	self.disp_model = POLYDISPERSITY_MODELS['array']()
2120	self.disp_model.set_weights(np.array(values), np.array(weights))
2121	# + update the cell with filename
2122	fname = os.path.basename(str(datafile))
2123	fname_index = self._poly_model.index(row_index, self.lstPoly.itemDelegate().poly_filename)
2124	self._poly_model.setData(fname_index, fname)
2125
2126	def setMagneticModel(self):
2127	"""
2128	Set magnetism values on model
2129	"""
2130	if not self.model_parameters:
2131	return
2132	self._magnet_model.clear()
2133	[self.addCheckedMagneticListToModel(param, self._magnet_model) for param in \
2134	self.model_parameters.call_parameters if param.type == 'magnetic']
2135	FittingUtilities.addHeadersToModel(self._magnet_model)
2136
2137	def shellNamesList(self):
2138	"""
2139	Returns list of names of all multi-shell parameters
2140	E.g. for sld[n], radius[n], n=1..3 it will return
2141	[sld1, sld2, sld3, radius1, radius2, radius3]
2142	"""
2143	multi_names = [p.name[:p.name.index('[')] for p in self.model_parameters.iq_parameters if '[' in p.name]
2144	top_index = self.kernel_module.multiplicity_info.number
2145	shell_names = []
2146	for i in range(1, top_index+1):
2147	for name in multi_names:
2148	shell_names.append(name+str(i))
2149	return shell_names
2150
2151	def addCheckedMagneticListToModel(self, param, model):
2152	"""
2153	Wrapper for model update with a subset of magnetic parameters
2154	"""
2155	if param.name[param.name.index(':')+1:] in self.shell_names:
2156	# check if two-digit shell number
2157	try:
2158	shell_index = int(param.name[-2:])
2159	except ValueError:
2160	shell_index = int(param.name[-1:])
2161
2162	if shell_index > self.current_shell_displayed:
2163	return
2164
2165	checked_list = [param.name,
2166	str(param.default),
2167	str(param.limits[0]),
2168	str(param.limits[1]),
2169	param.units]
2170
2171	FittingUtilities.addCheckedListToModel(model, checked_list)
2172
2173	def enableStructureFactorControl(self, structure_factor):
2174	"""
2175	Add structure factors to the list of parameters
2176	"""
2177	if self.kernel_module.is_form_factor or structure_factor == 'None':
2178	self.enableStructureCombo()
2179	else:
2180	self.disableStructureCombo()
2181
2182	def addExtraShells(self):
2183	"""
2184	Add a combobox for multiple shell display
2185	"""
2186	param_name, param_length = FittingUtilities.getMultiplicity(self.model_parameters)
2187
2188	if param_length == 0:
2189	return
2190
2191	# cell 1: variable name
2192	item1 = QtGui.QStandardItem(param_name)
2193
2194	func = QtWidgets.QComboBox()
2195	# Available range of shells displayed in the combobox
2196	func.addItems([str(i) for i in range(param_length+1)])
2197
2198	# Respond to index change
2199	func.currentIndexChanged.connect(self.modifyShellsInList)
2200
2201	# cell 2: combobox
2202	item2 = QtGui.QStandardItem()
2203	self._model_model.appendRow([item1, item2])
2204
2205	# Beautify the row: span columns 2-4
2206	shell_row = self._model_model.rowCount()
2207	shell_index = self._model_model.index(shell_row-1, 1)
2208
2209	self.lstParams.setIndexWidget(shell_index, func)
2210	self._last_model_row = self._model_model.rowCount()
2211
2212	# Set the index to the state-kept value
2213	func.setCurrentIndex(self.current_shell_displayed
2214	if self.current_shell_displayed < func.count() else 0)
2215
2216	def modifyShellsInList(self, index):
2217	"""
2218	Add/remove additional multishell parameters
2219	"""
2220	# Find row location of the combobox
2221	last_row = self._last_model_row
2222	remove_rows = self._model_model.rowCount() - last_row
2223
2224	if remove_rows > 1:
2225	self._model_model.removeRows(last_row, remove_rows)
2226
2227	FittingUtilities.addShellsToModel(self.model_parameters, self._model_model, index)
2228	self.current_shell_displayed = index
2229
2230	# Update relevant models
2231	self.setPolyModel()
2232	self.setMagneticModel()
2233
2234	def setFittingStarted(self):
2235	"""
2236	Set item enablement on fitting start
2237	"""
2238	#disable the Fit button
2239	self.cmdFit.setText('Running...')
2240	self.cmdFit.setEnabled(False)
2241
2242	def setFittingStopped(self):
2243	"""
2244	Set item enablement on fitting stop
2245	"""
2246	#enable the Fit button
2247	self.cmdFit.setText("Fit")
2248	self.cmdFit.setEnabled(True)
2249
2250	def readFitPage(self, fp):
2251	"""
2252	Read in state from a fitpage object and update GUI
2253	"""
2254	assert isinstance(fp, FitPage)
2255	# Main tab info
2256	self.logic.data.filename = fp.filename
2257	self.data_is_loaded = fp.data_is_loaded
2258	self.chkPolydispersity.setCheckState(fp.is_polydisperse)
2259	self.chkMagnetism.setCheckState(fp.is_magnetic)
2260	self.chk2DView.setCheckState(fp.is2D)
2261
2262	# Update the comboboxes
2263	self.cbCategory.setCurrentIndex(self.cbCategory.findText(fp.current_category))
2264	self.cbModel.setCurrentIndex(self.cbModel.findText(fp.current_model))
2265	if fp.current_factor:
2266	self.cbStructureFactor.setCurrentIndex(self.cbStructureFactor.findText(fp.current_factor))
2267
2268	self.chi2 = fp.chi2
2269
2270	# Options tab
2271	self.q_range_min = fp.fit_options[fp.MIN_RANGE]
2272	self.q_range_max = fp.fit_options[fp.MAX_RANGE]
2273	self.npts = fp.fit_options[fp.NPTS]
2274	self.log_points = fp.fit_options[fp.LOG_POINTS]
2275	self.weighting = fp.fit_options[fp.WEIGHTING]
2276
2277	# Models
2278	self._model_model = fp.model_model
2279	self._poly_model = fp.poly_model
2280	self._magnet_model = fp.magnetism_model
2281
2282	# Resolution tab
2283	smearing = fp.smearing_options[fp.SMEARING_OPTION]
2284	accuracy = fp.smearing_options[fp.SMEARING_ACCURACY]
2285	smearing_min = fp.smearing_options[fp.SMEARING_MIN]
2286	smearing_max = fp.smearing_options[fp.SMEARING_MAX]
2287	self.smearing_widget.setState(smearing, accuracy, smearing_min, smearing_max)
2288
2289	# TODO: add polidyspersity and magnetism
2290
2291	def saveToFitPage(self, fp):
2292	"""
2293	Write current state to the given fitpage
2294	"""
2295	assert isinstance(fp, FitPage)
2296
2297	# Main tab info
2298	fp.filename = self.logic.data.filename
2299	fp.data_is_loaded = self.data_is_loaded
2300	fp.is_polydisperse = self.chkPolydispersity.isChecked()
2301	fp.is_magnetic = self.chkMagnetism.isChecked()
2302	fp.is2D = self.chk2DView.isChecked()
2303	fp.data = self.data
2304
2305	# Use current models - they contain all the required parameters
2306	fp.model_model = self._model_model
2307	fp.poly_model = self._poly_model
2308	fp.magnetism_model = self._magnet_model
2309
2310	if self.cbCategory.currentIndex() != 0:
2311	fp.current_category = str(self.cbCategory.currentText())
2312	fp.current_model = str(self.cbModel.currentText())
2313
2314	if self.cbStructureFactor.isEnabled() and self.cbStructureFactor.currentIndex() != 0:
2315	fp.current_factor = str(self.cbStructureFactor.currentText())
2316	else:
2317	fp.current_factor = ''
2318
2319	fp.chi2 = self.chi2
2320	fp.parameters_to_fit = self.parameters_to_fit
2321	fp.kernel_module = self.kernel_module
2322
2323	# Algorithm options
2324	# fp.algorithm = self.parent.fit_options.selected_id
2325
2326	# Options tab
2327	fp.fit_options[fp.MIN_RANGE] = self.q_range_min
2328	fp.fit_options[fp.MAX_RANGE] = self.q_range_max
2329	fp.fit_options[fp.NPTS] = self.npts
2330	#fp.fit_options[fp.NPTS_FIT] = self.npts_fit
2331	fp.fit_options[fp.LOG_POINTS] = self.log_points
2332	fp.fit_options[fp.WEIGHTING] = self.weighting
2333
2334	# Resolution tab
2335	smearing, accuracy, smearing_min, smearing_max = self.smearing_widget.state()
2336	fp.smearing_options[fp.SMEARING_OPTION] = smearing
2337	fp.smearing_options[fp.SMEARING_ACCURACY] = accuracy
2338	fp.smearing_options[fp.SMEARING_MIN] = smearing_min
2339	fp.smearing_options[fp.SMEARING_MAX] = smearing_max
2340
2341	# TODO: add polidyspersity and magnetism
2342
2343
2344	def updateUndo(self):
2345	"""
2346	Create a new state page and add it to the stack
2347	"""
2348	if self.undo_supported:
2349	self.pushFitPage(self.currentState())
2350
2351	def currentState(self):
2352	"""
2353	Return fit page with current state
2354	"""
2355	new_page = FitPage()
2356	self.saveToFitPage(new_page)
2357
2358	return new_page
2359
2360	def pushFitPage(self, new_page):
2361	"""
2362	Add a new fit page object with current state
2363	"""
2364	self.page_stack.append(new_page)
2365
2366	def popFitPage(self):
2367	"""
2368	Remove top fit page from stack
2369	"""
2370	if self.page_stack:
2371	self.page_stack.pop()
2372

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SasView

source: sasview/src/sas/qtgui/Perspectives/Fitting/FittingWidget.py @ c3eb858

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