source: sasview/src/sas/qtgui/MainWindow/DataExplorer.py @ 99f8760

ESS_GUIESS_GUI_bumps_abstractionESS_GUI_iss1116ESS_GUI_openclESS_GUI_sync_sascalc
Last change on this file since 99f8760 was 99f8760, checked in by Piotr Rozyczko <piotr.rozyczko@…>, 6 months ago

Improvements to batch save/load SASVIEW-1222.
Project save/load will now recreate the grid window as well as retain
result theories under dataset indices.

  • Property mode set to 100644
File size: 67.8 KB
Line 
1# global
2import sys
3import os
4import time
5import logging
6import copy
7
8from PyQt5 import QtCore
9from PyQt5 import QtGui
10from PyQt5 import QtWidgets
11
12from twisted.internet import threads
13
14# SASCALC
15from sas.sascalc.dataloader.loader import Loader
16
17# QTGUI
18import sas.qtgui.Utilities.GuiUtils as GuiUtils
19import sas.qtgui.Plotting.PlotHelper as PlotHelper
20
21from sas.qtgui.Plotting.PlotterData import Data1D
22from sas.qtgui.Plotting.PlotterData import Data2D
23from sas.qtgui.Plotting.Plotter import Plotter
24from sas.qtgui.Plotting.Plotter2D import Plotter2D
25from sas.qtgui.Plotting.MaskEditor import MaskEditor
26
27from sas.qtgui.MainWindow.DataManager import DataManager
28from sas.qtgui.MainWindow.DroppableDataLoadWidget import DroppableDataLoadWidget
29
30import sas.qtgui.Perspectives as Perspectives
31
32DEFAULT_PERSPECTIVE = "Fitting"
33
34logger = logging.getLogger(__name__)
35
36class DataExplorerWindow(DroppableDataLoadWidget):
37    # The controller which is responsible for managing signal slots connections
38    # for the gui and providing an interface to the data model.
39
40    def __init__(self, parent=None, guimanager=None, manager=None):
41        super(DataExplorerWindow, self).__init__(parent, guimanager)
42
43        # Main model for keeping loaded data
44        self.model = QtGui.QStandardItemModel(self)
45        # Secondary model for keeping frozen data sets
46        self.theory_model = QtGui.QStandardItemModel(self)
47
48        # GuiManager is the actual parent, but we needed to also pass the QMainWindow
49        # in order to set the widget parentage properly.
50        self.parent = guimanager
51        self.loader = Loader()
52
53        # Read in default locations
54        self.default_save_location = None
55        self.default_load_location = GuiUtils.DEFAULT_OPEN_FOLDER
56        self.default_project_location = None
57
58        self.manager = manager if manager is not None else DataManager()
59        self.txt_widget = QtWidgets.QTextEdit(None)
60
61        # Be careful with twisted threads.
62        self.mutex = QtCore.QMutex()
63
64        # Plot widgets {name:widget}, required to keep track of plots shown as MDI subwindows
65        self.plot_widgets = {}
66
67        # Active plots {id:Plotter1D/2D}, required to keep track of currently displayed plots
68        self.active_plots = {}
69
70        # Connect the buttons
71        self.cmdLoad.clicked.connect(self.loadFile)
72        self.cmdDeleteData.clicked.connect(self.deleteFile)
73        self.cmdDeleteTheory.clicked.connect(self.deleteTheory)
74        self.cmdFreeze.clicked.connect(self.freezeTheory)
75        self.cmdSendTo.clicked.connect(self.sendData)
76        self.cmdNew.clicked.connect(self.newPlot)
77        self.cmdNew_2.clicked.connect(self.newPlot)
78        self.cmdAppend.clicked.connect(self.appendPlot)
79        self.cmdAppend_2.clicked.connect(self.appendPlot)
80        self.cmdHelp.clicked.connect(self.displayHelp)
81        self.cmdHelp_2.clicked.connect(self.displayHelp)
82
83        # Fill in the perspectives combo
84        self.initPerspectives()
85
86        # Custom context menu
87        self.treeView.setContextMenuPolicy(QtCore.Qt.CustomContextMenu)
88        self.treeView.customContextMenuRequested.connect(self.onCustomContextMenu)
89        self.contextMenu()
90
91        # Same menus for the theory view
92        self.freezeView.setContextMenuPolicy(QtCore.Qt.CustomContextMenu)
93        self.freezeView.customContextMenuRequested.connect(self.onCustomContextMenu)
94
95        # Connect the comboboxes
96        self.cbSelect.activated.connect(self.selectData)
97
98        #self.closeEvent.connect(self.closeEvent)
99        self.currentChanged.connect(self.onTabSwitch)
100        self.communicator = self.parent.communicator()
101        self.communicator.fileReadSignal.connect(self.loadFromURL)
102        self.communicator.activeGraphsSignal.connect(self.updateGraphCount)
103        self.communicator.activeGraphName.connect(self.updatePlotName)
104        self.communicator.plotUpdateSignal.connect(self.updatePlot)
105        self.communicator.maskEditorSignal.connect(self.showEditDataMask)
106        self.communicator.extMaskEditorSignal.connect(self.extShowEditDataMask)
107        self.communicator.changeDataExplorerTabSignal.connect(self.changeTabs)
108        self.communicator.forcePlotDisplaySignal.connect(self.displayData)
109        self.communicator.updateModelFromPerspectiveSignal.connect(self.updateModelFromPerspective)
110
111        self.cbgraph.editTextChanged.connect(self.enableGraphCombo)
112        self.cbgraph.currentIndexChanged.connect(self.enableGraphCombo)
113
114        # Proxy model for showing a subset of Data1D/Data2D content
115        self.data_proxy = QtCore.QSortFilterProxyModel(self)
116        self.data_proxy.setSourceModel(self.model)
117
118        # Don't show "empty" rows with data objects
119        self.data_proxy.setFilterRegExp(r"[^()]")
120
121        # The Data viewer is QTreeView showing the proxy model
122        self.treeView.setModel(self.data_proxy)
123
124        # Proxy model for showing a subset of Theory content
125        self.theory_proxy = QtCore.QSortFilterProxyModel(self)
126        self.theory_proxy.setSourceModel(self.theory_model)
127
128        # Don't show "empty" rows with data objects
129        self.theory_proxy.setFilterRegExp(r"[^()]")
130
131        # Theory model view
132        self.freezeView.setModel(self.theory_proxy)
133
134        self.enableGraphCombo(None)
135
136        # Current view on model
137        self.current_view = self.treeView
138
139    def closeEvent(self, event):
140        """
141        Overwrite the close event - no close!
142        """
143        event.ignore()
144
145    def onTabSwitch(self, index):
146        """ Callback for tab switching signal """
147        if index == 0:
148            self.current_view = self.treeView
149        else:
150            self.current_view = self.freezeView
151
152    def changeTabs(self, tab=0):
153        """
154        Switch tabs of the data explorer
155        0: data tab
156        1: theory tab
157        """
158        assert(tab in [0,1])
159        self.setCurrentIndex(tab)
160
161    def displayHelp(self):
162        """
163        Show the "Loading data" section of help
164        """
165        tree_location = "/user/qtgui/MainWindow/data_explorer_help.html"
166        self.parent.showHelp(tree_location)
167
168    def enableGraphCombo(self, combo_text):
169        """
170        Enables/disables "Assign Plot" elements
171        """
172        self.cbgraph.setEnabled(len(PlotHelper.currentPlots()) > 0)
173        self.cmdAppend.setEnabled(len(PlotHelper.currentPlots()) > 0)
174
175    def initPerspectives(self):
176        """
177        Populate the Perspective combobox and define callbacks
178        """
179        available_perspectives = sorted([p for p in list(Perspectives.PERSPECTIVES.keys())])
180        if available_perspectives:
181            self.cbFitting.clear()
182            self.cbFitting.addItems(available_perspectives)
183        self.cbFitting.currentIndexChanged.connect(self.updatePerspectiveCombo)
184        # Set the index so we see the default (Fitting)
185        self.cbFitting.setCurrentIndex(self.cbFitting.findText(DEFAULT_PERSPECTIVE))
186
187    def _perspective(self):
188        """
189        Returns the current perspective
190        """
191        return self.parent.perspective()
192
193    def loadFromURL(self, url):
194        """
195        Threaded file load
196        """
197        load_thread = threads.deferToThread(self.readData, url)
198        load_thread.addCallback(self.loadComplete)
199        load_thread.addErrback(self.loadFailed)
200
201    def loadFile(self, event=None):
202        """
203        Called when the "Load" button pressed.
204        Opens the Qt "Open File..." dialog
205        """
206        path_str = self.chooseFiles()
207        if not path_str:
208            return
209        self.loadFromURL(path_str)
210
211    def loadFolder(self, event=None):
212        """
213        Called when the "File/Load Folder" menu item chosen.
214        Opens the Qt "Open Folder..." dialog
215        """
216        kwargs = {
217            'parent'    : self,
218            'caption'   : 'Choose a directory',
219            'options'   : QtWidgets.QFileDialog.ShowDirsOnly | QtWidgets.QFileDialog.DontUseNativeDialog,
220            'directory' : self.default_load_location
221        }
222        folder = QtWidgets.QFileDialog.getExistingDirectory(**kwargs)
223
224        if folder is None:
225            return
226
227        folder = str(folder)
228        if not os.path.isdir(folder):
229            return
230        self.default_load_location = folder
231        # get content of dir into a list
232        path_str = [os.path.join(os.path.abspath(folder), filename)
233                    for filename in os.listdir(folder)]
234
235        self.loadFromURL(path_str)
236
237    def loadProject(self):
238        """
239        Called when the "Open Project" menu item chosen.
240        """
241        # check if any items loaded and warn about data deletion
242        if self.model.rowCount() > 0:
243            msg = "This operation will remove all data, plots and analyses from"
244            msg += " SasView before loading the project. Do you wish to continue?"
245            msgbox = QtWidgets.QMessageBox(self)
246            msgbox.setIcon(QtWidgets.QMessageBox.Warning)
247            msgbox.setText(msg)
248            msgbox.setWindowTitle("Project Load")
249            # custom buttons
250            button_yes = QtWidgets.QPushButton("Yes")
251            msgbox.addButton(button_yes, QtWidgets.QMessageBox.YesRole)
252            button_no = QtWidgets.QPushButton("No")
253            msgbox.addButton(button_no, QtWidgets.QMessageBox.RejectRole)
254            retval = msgbox.exec_()
255            if retval == QtWidgets.QMessageBox.RejectRole:
256                # cancel fit
257                return
258
259        kwargs = {
260            'parent'    : self,
261            'caption'   : 'Open Project',
262            'filter'    : 'Project Files (*.json);;Old Project Files (*.svs);;All files (*.*)',
263            'options'   : QtWidgets.QFileDialog.DontUseNativeDialog
264        }
265        filename = QtWidgets.QFileDialog.getOpenFileName(**kwargs)[0]
266        if filename:
267            self.default_project_location = os.path.dirname(filename)
268            self.deleteAllItems()
269            self.readProject(filename)
270
271    def loadAnalysis(self):
272        """
273        Called when the "Open Analysis" menu item chosen.
274        """
275        kwargs = {
276            'parent'    : self,
277            'caption'   : 'Open Analysis',
278            'filter'    : 'Project (*.fitv);;All files (*.*)',
279            'options'   : QtWidgets.QFileDialog.DontUseNativeDialog
280        }
281        filename = QtWidgets.QFileDialog.getOpenFileName(**kwargs)[0]
282        if filename:
283            self.readProject(filename)
284
285    def saveProject(self):
286        """
287        Called when the "Save Project" menu item chosen.
288        """
289        kwargs = {
290            'parent'    : self,
291            'caption'   : 'Save Project',
292            'filter'    : 'Project (*.json)',
293            'options'   : QtWidgets.QFileDialog.DontUseNativeDialog,
294            'directory' : self.default_project_location
295        }
296        name_tuple = QtWidgets.QFileDialog.getSaveFileName(**kwargs)
297        filename = name_tuple[0]
298        if not filename:
299            return
300        self.default_project_location = os.path.dirname(filename)
301        _, extension = os.path.splitext(filename)
302        if not extension:
303            filename = '.'.join((filename, 'json'))
304        self.communicator.statusBarUpdateSignal.emit("Saving Project... %s\n" % os.path.basename(filename))
305
306        return filename
307
308    def saveAsAnalysisFile(self, tab_id=1):
309        """
310        Show the save as... dialog and return the chosen filepath
311        """
312        default_name = "FitPage"+str(tab_id)+".fitv"
313
314        wildcard = "fitv files (*.fitv)"
315        kwargs = {
316            'caption'   : 'Save As',
317            'directory' : default_name,
318            'filter'    : wildcard,
319            'parent'    : None,
320        }
321        # Query user for filename.
322        filename_tuple = QtWidgets.QFileDialog.getSaveFileName(**kwargs)
323        filename = filename_tuple[0]
324        return filename
325
326    def saveAnalysis(self, data, tab_id=1):
327        """
328        Called when the "Save Analysis" menu item chosen.
329        """
330        filename = self.saveAsAnalysisFile(tab_id)
331        if not filename:
332            return
333        _, extension = os.path.splitext(filename)
334        if not extension:
335            filename = '.'.join((filename, 'fitv'))
336        self.communicator.statusBarUpdateSignal.emit("Saving analysis... %s\n" % os.path.basename(filename))
337
338        with open(filename, 'w') as outfile:
339            GuiUtils.saveData(outfile, data)
340
341        self.communicator.statusBarUpdateSignal.emit('Analysis saved.')
342
343    def allDataForModel(self, model):
344        # data model
345        all_data = {}
346        for i in range(model.rowCount()):
347            properties = {}
348            item = model.item(i)
349            data = GuiUtils.dataFromItem(item)
350            if data is None: continue
351            # Now, all plots under this item
352            filename = data.filename
353            is_checked = item.checkState()
354            properties['checked'] = is_checked
355            other_datas = []
356            # save underlying theories
357            other_datas = GuiUtils.plotsFromFilename(filename, model)
358            # skip the main plot
359            other_datas = list(other_datas.values())[1:]
360            all_data[data.id] = [data, properties, other_datas]
361        return all_data
362
363    def getDataForID(self, id):
364        # return the dataset with the given ID
365        all_data = []
366        for model in (self.model, self.theory_model):
367            for i in range(model.rowCount()):
368                properties = {}
369                item = model.item(i)
370                data = GuiUtils.dataFromItem(item)
371                if data is None: continue
372                if data.id != id: continue
373                # We found the dataset - save it.
374                filename = data.filename
375                is_checked = item.checkState()
376                properties['checked'] = is_checked
377                other_datas = GuiUtils.plotsFromFilename(filename, model)
378                # skip the main plot
379                other_datas = list(other_datas.values())[1:]
380                all_data = [data, properties, other_datas]
381                break
382        return all_data
383
384    def getItemForID(self, id):
385        # return the model item with the given ID
386        item = None
387        for model in (self.model, self.theory_model):
388            for i in range(model.rowCount()):
389                properties = {}
390                data = GuiUtils.dataFromItem(model.item(i))
391                if data is None: continue
392                if data.id != id: continue
393                # We found the item - return it
394                item = model.item(i)
395                break
396        return item
397
398    def getAllData(self):
399        """
400        converts all datasets into serializable dictionary
401        """
402        data = self.allDataForModel(self.model)
403        theory = self.allDataForModel(self.theory_model)
404
405        all_data = {}
406        all_data['is_batch'] = str(self.chkBatch.isChecked())
407
408        for key, value in data.items():
409            all_data[key] = value
410        for key, value in theory.items():
411            if key in all_data:
412                raise ValueError("Inconsistent data in Project file.")
413            all_data[key] = value
414        return all_data
415
416    def saveDataToFile(self, outfile):
417        """
418        Save every dataset to a json file
419        """
420        all_data = self.getAllData()
421        # save datas
422        GuiUtils.saveData(outfile, all_data)
423
424    def readProject(self, filename):
425        """
426        Read out datasets and fitpages from file
427        """
428        # Find out the filetype based on extension
429        ext = os.path.splitext(filename)[1]
430        all_data = {}
431        if 'svs' in ext.lower():
432            # backward compatibility mode.
433            try:
434                datasets = GuiUtils.readProjectFromSVS(filename)
435            except Exception as ex:
436                # disregard malformed SVS and try to recover whatever
437                # is available
438                msg = "Error while reading the project file: "+str(ex)
439                logging.error(msg)
440                pass
441            # Convert fitpage properties and update the dict
442            try:
443                all_data = GuiUtils.convertFromSVS(datasets)
444            except Exception as ex:
445                # disregard malformed SVS and try to recover regardless
446                msg = "Error while converting the project file: "+str(ex)
447                logging.error(msg)
448                pass
449        else:
450            with open(filename, 'r') as infile:
451                try:
452                    all_data = GuiUtils.readDataFromFile(infile)
453                except Exception as ex:
454                    logging.error("Project load failed with " + str(ex))
455                    return
456        for key, value in all_data.items():
457            if key=='is_batch':
458                self.chkBatch.setChecked(True if value=='True' else False)
459                if 'batch_grid' not in all_data:
460                    continue
461                grid_pages = all_data['batch_grid']
462                for grid_name, grid_page in grid_pages.items():
463                    grid_page.append(grid_name)
464                    self.parent.showBatchOutput(grid_page)
465                continue
466            if 'cs_tab' in key:
467                continue
468            # send newly created items to the perspective
469            self.updatePerspectiveWithProperties(key, value)
470
471        # See if there are any batch pages defined and create them, if so
472        self.updateWithBatchPages(all_data)
473
474        # Only now can we create/assign C&S pages.
475        for key, value in all_data.items():
476            if 'cs_tab' in key:
477                self.updatePerspectiveWithProperties(key, value)
478
479    def updateWithBatchPages(self, all_data):
480        """
481        Checks all properties and see if there are any batch pages defined.
482        If so, pull out relevant indices and recreate the batch page(s)
483        """
484        batch_pages = []
485        for key, value in all_data.items():
486            if 'fit_params' not in value:
487                continue
488            params = value['fit_params']
489            for page in params:
490                if page['is_batch_fitting'][0] != 'True':
491                    continue
492                batch_ids = page['data_id'][0]
493                # check for duplicates
494                batch_set = set(batch_ids)
495                if batch_set in batch_pages:
496                    continue
497                # Found a unique batch page. Send it away
498                items = [self.getItemForID(i) for i in batch_set]
499                # Update the batch page list
500                batch_pages.append(batch_set)
501                # Assign parameters to the most recent (current) page.
502                self._perspective().setData(data_item=items, is_batch=True)
503                self._perspective().updateFromParameters(page)
504        pass
505
506    def updatePerspectiveWithProperties(self, key, value):
507        """
508        """
509        if 'fit_data' in value:
510            data_dict = {key:value['fit_data']}
511            # Create new model items in the data explorer
512            items = self.updateModelFromData(data_dict)
513
514        if 'fit_params' in value:
515            params = value['fit_params']
516            # Make the perspective read the rest of the read data
517            if not isinstance(params, list):
518                params = [params]
519            for page in params:
520                # Check if this set of parameters is for a batch page
521                # if so, skip the update
522                if page['is_batch_fitting'][0] == 'True':
523                    continue
524                # Send current model item to the perspective
525                self.sendItemToPerspective(items[0])
526                # Assign parameters to the most recent (current) page.
527                self._perspective().updateFromParameters(page)
528        if 'cs_tab' in key and 'is_constraint' in value:
529            # Create a C&S page
530            self._perspective().addConstraintTab()
531            # Modify the tab
532            self._perspective().updateFromParameters(value)
533
534        pass # debugger
535
536    def updateModelFromData(self, data):
537        """
538        Given data from analysis/project file,
539        create indices and populate data/theory models
540        """
541        # model items for top level datasets
542        items = []
543        for key, value in data.items():
544            # key - cardinal number of dataset
545            # value - main dataset, [dependant filesets]
546            # add the main index
547            if not value: continue
548            new_data = value[0]
549            from sas.sascalc.dataloader.data_info import Data1D as old_data1d
550            from sas.sascalc.dataloader.data_info import Data2D as old_data2d
551            if isinstance(new_data, (old_data1d, old_data2d)):
552                new_data = self.manager.create_gui_data(value[0], new_data.filename)
553            assert isinstance(new_data, (Data1D, Data2D))
554            # make sure the ID is retained
555            new_data.id = value[0].id
556            new_data.group_id = value[0].group_id
557            properties = value[1]
558            is_checked = properties['checked']
559            new_item = GuiUtils.createModelItemWithPlot(new_data, new_data.filename)
560            new_item.setCheckState(is_checked)
561            items.append(new_item)
562            model = self.theory_model
563            if value[0].is_data:
564                model = self.model
565                # Caption for the theories
566                new_item.setChild(2, QtGui.QStandardItem("FIT RESULTS"))
567
568            model.appendRow(new_item)
569            self.manager.add_data(data_list={new_data.id:new_data})
570
571            # Add the underlying data
572            if not value[2]:
573                continue
574            for plot in value[2]:
575                assert isinstance(plot, (Data1D, Data2D))
576                GuiUtils.updateModelItemWithPlot(new_item, plot, plot.name)
577        return items
578
579    def deleteFile(self, event):
580        """
581        Delete selected rows from the model
582        """
583        # Assure this is indeed wanted
584        delete_msg = "This operation will delete the checked data sets and all the dependents." +\
585                     "\nDo you want to continue?"
586        reply = QtWidgets.QMessageBox.question(self,
587                                           'Warning',
588                                           delete_msg,
589                                           QtWidgets.QMessageBox.Yes,
590                                           QtWidgets.QMessageBox.No)
591
592        if reply == QtWidgets.QMessageBox.No:
593            return
594
595        # Figure out which rows are checked
596        ind = -1
597        # Use 'while' so the row count is forced at every iteration
598        deleted_items = []
599        deleted_names = []
600        while ind < self.model.rowCount():
601            ind += 1
602            item = self.model.item(ind)
603
604            if item and item.isCheckable() and item.checkState() == QtCore.Qt.Checked:
605                # Delete these rows from the model
606                deleted_names.append(str(self.model.item(ind).text()))
607                deleted_items.append(item)
608
609                self.model.removeRow(ind)
610                # Decrement index since we just deleted it
611                ind -= 1
612
613        # Let others know we deleted data
614        self.communicator.dataDeletedSignal.emit(deleted_items)
615
616        # update stored_data
617        self.manager.update_stored_data(deleted_names)
618
619    def deleteTheory(self, event):
620        """
621        Delete selected rows from the theory model
622        """
623        # Assure this is indeed wanted
624        delete_msg = "This operation will delete the checked data sets and all the dependents." +\
625                     "\nDo you want to continue?"
626        reply = QtWidgets.QMessageBox.question(self,
627                                           'Warning',
628                                           delete_msg,
629                                           QtWidgets.QMessageBox.Yes,
630                                           QtWidgets.QMessageBox.No)
631
632        if reply == QtWidgets.QMessageBox.No:
633            return
634
635        # Figure out which rows are checked
636        ind = -1
637        # Use 'while' so the row count is forced at every iteration
638        while ind < self.theory_model.rowCount():
639            ind += 1
640            item = self.theory_model.item(ind)
641            if item and item.isCheckable() and item.checkState() == QtCore.Qt.Checked:
642                # Delete these rows from the model
643                self.theory_model.removeRow(ind)
644                # Decrement index since we just deleted it
645                ind -= 1
646
647        # pass temporarily kept as a breakpoint anchor
648        pass
649
650    def sendData(self, event=None):
651        """
652        Send selected item data to the current perspective and set the relevant notifiers
653        """
654        def isItemReady(index):
655            item = self.model.item(index)
656            return item.isCheckable() and item.checkState() == QtCore.Qt.Checked
657
658        # Figure out which rows are checked
659        selected_items = [self.model.item(index)
660                          for index in range(self.model.rowCount())
661                          if isItemReady(index)]
662
663        if len(selected_items) < 1:
664            return
665
666        # Which perspective has been selected?
667        if len(selected_items) > 1 and not self._perspective().allowBatch():
668            if hasattr(self._perspective(), 'title'):
669                title = self._perspective().title()
670            else:
671                title = self._perspective().windowTitle()
672            msg = title + " does not allow multiple data."
673            msgbox = QtWidgets.QMessageBox()
674            msgbox.setIcon(QtWidgets.QMessageBox.Critical)
675            msgbox.setText(msg)
676            msgbox.setStandardButtons(QtWidgets.QMessageBox.Ok)
677            retval = msgbox.exec_()
678            return
679
680        # Notify the GuiManager about the send request
681        try:
682            self._perspective().setData(data_item=selected_items, is_batch=self.chkBatch.isChecked())
683        except Exception as ex:
684            msg = "%s perspective returned the following message: \n%s\n" %(self._perspective().name, str(ex))
685            logging.error(msg)
686            msg = str(ex)
687            msgbox = QtWidgets.QMessageBox()
688            msgbox.setIcon(QtWidgets.QMessageBox.Critical)
689            msgbox.setText(msg)
690            msgbox.setStandardButtons(QtWidgets.QMessageBox.Ok)
691            retval = msgbox.exec_()
692
693    def sendItemToPerspective(self, item):
694        """
695        Send the passed item data to the current perspective and set the relevant notifiers
696        """
697        # Set the signal handlers
698        self.communicator.updateModelFromPerspectiveSignal.connect(self.updateModelFromPerspective)
699        selected_items = [item]
700        # Notify the GuiManager about the send request
701        try:
702            self._perspective().setData(data_item=selected_items, is_batch=False)
703        except Exception as ex:
704            msg = "%s perspective returned the following message: \n%s\n" %(self._perspective().name, str(ex))
705            logging.error(msg)
706            msg = str(ex)
707            msgbox = QtWidgets.QMessageBox()
708            msgbox.setIcon(QtWidgets.QMessageBox.Critical)
709            msgbox.setText(msg)
710            msgbox.setStandardButtons(QtWidgets.QMessageBox.Ok)
711            retval = msgbox.exec_()
712
713    def freezeCheckedData(self):
714        """
715        Convert checked results (fitted model, residuals) into separate dataset.
716        """
717        outer_index = -1
718        theories_copied = 0
719        orig_model_size = self.model.rowCount()
720        while outer_index < orig_model_size:
721            outer_index += 1
722            outer_item = self.model.item(outer_index)
723            if not outer_item:
724                continue
725            if not outer_item.isCheckable():
726                continue
727            # Look for checked inner items
728            inner_index = -1
729            while inner_index < outer_item.rowCount():
730               inner_item = outer_item.child(inner_index)
731               inner_index += 1
732               if not inner_item:
733                   continue
734               if not inner_item.isCheckable():
735                   continue
736               if inner_item.checkState() != QtCore.Qt.Checked:
737                   continue
738               self.model.beginResetModel()
739               theories_copied += 1
740               new_item = self.cloneTheory(inner_item)
741               self.model.appendRow(new_item)
742               self.model.endResetModel()
743
744        freeze_msg = ""
745        if theories_copied == 0:
746            return
747        elif theories_copied == 1:
748            freeze_msg = "1 theory copied to a separate data set"
749        elif theories_copied > 1:
750            freeze_msg = "%i theories copied to separate data sets" % theories_copied
751        else:
752            freeze_msg = "Unexpected number of theories copied: %i" % theories_copied
753            raise AttributeError(freeze_msg)
754        self.communicator.statusBarUpdateSignal.emit(freeze_msg)
755
756    def freezeTheory(self, event):
757        """
758        Freeze selected theory rows.
759
760        "Freezing" means taking the plottable data from the Theory item
761        and copying it to a separate top-level item in Data.
762        """
763        # Figure out which rows are checked
764        # Use 'while' so the row count is forced at every iteration
765        outer_index = -1
766        theories_copied = 0
767        while outer_index < self.theory_model.rowCount():
768            outer_index += 1
769            outer_item = self.theory_model.item(outer_index)
770            if not outer_item:
771                continue
772            if outer_item.isCheckable() and \
773                   outer_item.checkState() == QtCore.Qt.Checked:
774                self.model.beginResetModel()
775                theories_copied += 1
776                new_item = self.cloneTheory(outer_item)
777                self.model.appendRow(new_item)
778                self.model.endResetModel()
779
780        freeze_msg = ""
781        if theories_copied == 0:
782            return
783        elif theories_copied == 1:
784            freeze_msg = "1 theory copied from the Theory tab as a data set"
785        elif theories_copied > 1:
786            freeze_msg = "%i theories copied from the Theory tab as data sets" % theories_copied
787        else:
788            freeze_msg = "Unexpected number of theories copied: %i" % theories_copied
789            raise AttributeError(freeze_msg)
790        self.communicator.statusBarUpdateSignal.emit(freeze_msg)
791        # Actively switch tabs
792        self.setCurrentIndex(1)
793
794    def cloneTheory(self, item_from):
795        """
796        Manually clone theory items into a new HashableItem
797        """
798        new_item = GuiUtils.HashableStandardItem()
799        new_item.setCheckable(True)
800        new_item.setCheckState(QtCore.Qt.Checked)
801        info_item = QtGui.QStandardItem("Info")
802        data_item = QtGui.QStandardItem()
803        orig_data = copy.deepcopy(item_from.child(0).data())
804        data_item.setData(orig_data)
805        new_item.setText(item_from.text())
806        new_item.setChild(0, data_item)
807        new_item.setChild(1, info_item)
808        # Append a "unique" descriptor to the name
809        time_bit = str(time.time())[7:-1].replace('.', '')
810        new_name = new_item.text() + '_@' + time_bit
811        new_item.setText(new_name)
812        # Change the underlying data so it is no longer a theory
813        try:
814            new_item.child(0).data().is_data = True
815            new_item.child(0).data().symbol = 'Circle'
816            new_item.child(0).data().id = new_name
817        except AttributeError:
818            #no data here, pass
819            pass
820        return new_item
821
822    def recursivelyCloneItem(self, item):
823        """
824        Clone QStandardItem() object
825        """
826        new_item = item.clone()
827        # clone doesn't do deepcopy :(
828        for child_index in range(item.rowCount()):
829            child_item = self.recursivelyCloneItem(item.child(child_index))
830            new_item.setChild(child_index, child_item)
831        return new_item
832
833    def updatePlotName(self, name_tuple):
834        """
835        Modify the name of the current plot
836        """
837        old_name, current_name = name_tuple
838        ind = self.cbgraph.findText(old_name)
839        self.cbgraph.setCurrentIndex(ind)
840        self.cbgraph.setItemText(ind, current_name)
841
842    def add_data(self, data_list):
843        """
844        Update the data manager with new items
845        """
846        self.manager.add_data(data_list)
847
848    def updateGraphCount(self, graph_list):
849        """
850        Modify the graph name combo and potentially remove
851        deleted graphs
852        """
853        self.updateGraphCombo(graph_list)
854
855        if not self.active_plots:
856            return
857        new_plots = [PlotHelper.plotById(plot) for plot in graph_list]
858        active_plots_copy = list(self.active_plots.keys())
859        for plot in active_plots_copy:
860            if self.active_plots[plot] in new_plots:
861                continue
862            self.active_plots.pop(plot)
863
864    def updateGraphCombo(self, graph_list):
865        """
866        Modify Graph combo box on graph add/delete
867        """
868        orig_text = self.cbgraph.currentText()
869        self.cbgraph.clear()
870        self.cbgraph.insertItems(0, graph_list)
871        ind = self.cbgraph.findText(orig_text)
872        if ind > 0:
873            self.cbgraph.setCurrentIndex(ind)
874
875    def updatePerspectiveCombo(self, index):
876        """
877        Notify the gui manager about the new perspective chosen.
878        """
879        self.communicator.perspectiveChangedSignal.emit(self.cbFitting.itemText(index))
880        self.chkBatch.setEnabled(self.parent.perspective().allowBatch())
881
882    def itemFromFilename(self, filename):
883        """
884        Retrieves model item corresponding to the given filename
885        """
886        item = GuiUtils.itemFromFilename(filename, self.model)
887        return item
888
889    def displayFile(self, filename=None, is_data=True, id=None):
890        """
891        Forces display of charts for the given filename
892        """
893        model = self.model if is_data else self.theory_model
894        # Now query the model item for available plots
895        plots = GuiUtils.plotsFromFilename(filename, model)
896        # Each fitpage contains the name based on fit widget number
897        fitpage_name = "" if id is None else "M"+str(id)
898        new_plots = []
899        for item, plot in plots.items():
900            if self.updatePlot(plot):
901                # Don't create plots which are already displayed
902                continue
903            # Don't plot intermediate results, e.g. P(Q), S(Q)
904            match = GuiUtils.theory_plot_ID_pattern.match(plot.id)
905            # 2nd match group contains the identifier for the intermediate
906            # result, if present (e.g. "[P(Q)]")
907            if match and match.groups()[1] != None:
908                continue
909            # Don't include plots from different fitpages,
910            # but always include the original data
911            if (fitpage_name in plot.name
912                    or filename in plot.name
913                    or filename == plot.filename):
914                # Residuals get their own plot
915                if plot.plot_role == Data1D.ROLE_RESIDUAL:
916                    plot.yscale='linear'
917                    self.plotData([(item, plot)])
918                else:
919                    new_plots.append((item, plot))
920
921        if new_plots:
922            self.plotData(new_plots)
923
924    def displayData(self, data_list, id=None):
925        """
926        Forces display of charts for the given data set
927        """
928        # data_list = [QStandardItem, Data1D/Data2D]
929        plot_to_show = data_list[1]
930        plot_item = data_list[0]
931
932        # plots to show
933        new_plots = []
934
935        # Get the main data plot
936        main_data = GuiUtils.dataFromItem(plot_item.parent())
937        if main_data is None:
938            # Try the current item
939            main_data = GuiUtils.dataFromItem(plot_item)
940        # 1D dependent plots of 2D sets - special treatment
941        if isinstance(main_data, Data2D) and isinstance(plot_to_show, Data1D):
942            main_data = None
943
944        # Make sure main data for 2D is always displayed
945        if main_data is not None and not self.isPlotShown(main_data):
946            if isinstance(main_data, Data2D):
947                self.plotData([(plot_item, main_data)])
948
949        # Check if this is merely a plot update
950        if self.updatePlot(plot_to_show):
951            return
952
953        # Residuals get their own plot
954        if plot_to_show.plot_role == Data1D.ROLE_RESIDUAL:
955            plot_to_show.yscale='linear'
956            self.plotData([(plot_item, plot_to_show)])
957        elif plot_to_show.plot_role == Data1D.ROLE_DELETABLE:
958            # No plot
959            return
960        else:
961            # Plots with main data points on the same chart
962            # Get the main data plot
963            if main_data is not None and not self.isPlotShown(main_data):
964                new_plots.append((plot_item, main_data))
965            new_plots.append((plot_item, plot_to_show))
966
967        if new_plots:
968            self.plotData(new_plots)
969
970    def isPlotShown(self, plot):
971        """
972        Checks currently shown plots and returns true if match
973        """
974        if not hasattr(plot, 'name'):
975            return False
976        ids_vals = [val.data.name for val in self.active_plots.values()]
977
978        return plot.name in ids_vals
979
980    def addDataPlot2D(self, plot_set, item):
981        """
982        Create a new 2D plot and add it to the workspace
983        """
984        plot2D = Plotter2D(self)
985        plot2D.item = item
986        plot2D.plot(plot_set)
987        self.addPlot(plot2D)
988        self.active_plots[plot2D.data.name] = plot2D
989        #============================================
990        # Experimental hook for silx charts
991        #============================================
992        ## Attach silx
993        #from silx.gui import qt
994        #from silx.gui.plot import StackView
995        #sv = StackView()
996        #sv.setColormap("jet", autoscale=True)
997        #sv.setStack(plot_set.data.reshape(1,100,100))
998        ##sv.setLabels(["x: -10 to 10 (200 samples)",
999        ##              "y: -10 to 5 (150 samples)"])
1000        #sv.show()
1001        #============================================
1002
1003    def plotData(self, plots, transform=True):
1004        """
1005        Takes 1D/2D data and generates a single plot (1D) or multiple plots (2D)
1006        """
1007        # Call show on requested plots
1008        # All same-type charts in one plot
1009        for item, plot_set in plots:
1010            if isinstance(plot_set, Data1D):
1011                if not 'new_plot' in locals():
1012                    new_plot = Plotter(self)
1013                    new_plot.item = item
1014                new_plot.plot(plot_set, transform=transform)
1015                # active_plots may contain multiple charts
1016                self.active_plots[plot_set.name] = new_plot
1017            elif isinstance(plot_set, Data2D):
1018                self.addDataPlot2D(plot_set, item)
1019            else:
1020                msg = "Incorrect data type passed to Plotting"
1021                raise AttributeError(msg)
1022
1023        if 'new_plot' in locals() and \
1024            hasattr(new_plot, 'data') and \
1025            isinstance(new_plot.data, Data1D):
1026                self.addPlot(new_plot)
1027
1028    def newPlot(self):
1029        """
1030        Select checked data and plot it
1031        """
1032        # Check which tab is currently active
1033        if self.current_view == self.treeView:
1034            plots = GuiUtils.plotsFromCheckedItems(self.model)
1035        else:
1036            plots = GuiUtils.plotsFromCheckedItems(self.theory_model)
1037
1038        self.plotData(plots)
1039
1040    def addPlot(self, new_plot):
1041        """
1042        Helper method for plot bookkeeping
1043        """
1044        # Update the global plot counter
1045        title = str(PlotHelper.idOfPlot(new_plot))
1046        new_plot.setWindowTitle(title)
1047
1048        # Set the object name to satisfy the Squish object picker
1049        new_plot.setObjectName(title)
1050
1051        # Add the plot to the workspace
1052        plot_widget = self.parent.workspace().addSubWindow(new_plot)
1053
1054        # Show the plot
1055        new_plot.show()
1056        new_plot.canvas.draw()
1057
1058        # Update the plot widgets dict
1059        self.plot_widgets[title]=plot_widget
1060
1061        # Update the active chart list
1062        self.active_plots[new_plot.data.name] = new_plot
1063
1064    def appendPlot(self):
1065        """
1066        Add data set(s) to the existing matplotlib chart
1067        """
1068        # new plot data; check which tab is currently active
1069        if self.current_view == self.treeView:
1070            new_plots = GuiUtils.plotsFromCheckedItems(self.model)
1071        else:
1072            new_plots = GuiUtils.plotsFromCheckedItems(self.theory_model)
1073
1074        # old plot data
1075        plot_id = str(self.cbgraph.currentText())
1076        try:
1077            assert plot_id in PlotHelper.currentPlots(), "No such plot: %s"%(plot_id)
1078        except:
1079            return
1080
1081        old_plot = PlotHelper.plotById(plot_id)
1082
1083        # Add new data to the old plot, if data type is the same.
1084        for _, plot_set in new_plots:
1085            if type(plot_set) is type(old_plot._data):
1086                old_plot.data = plot_set
1087                old_plot.plot()
1088                # need this for lookup - otherwise this plot will never update
1089                self.active_plots[plot_set.name] = old_plot
1090
1091    def updatePlot(self, data):
1092        """
1093        Modify existing plot for immediate response and returns True.
1094        Returns false, if the plot does not exist already.
1095        """
1096        try: # there might be a list or a single value being passed
1097            data = data[0]
1098        except TypeError:
1099            pass
1100        assert type(data).__name__ in ['Data1D', 'Data2D']
1101
1102        ids_keys = list(self.active_plots.keys())
1103        ids_vals = [val.data.name for val in self.active_plots.values()]
1104
1105        data_id = data.name
1106        if data_id in ids_keys:
1107            # We have data, let's replace data that needs replacing
1108            if data.plot_role != Data1D.ROLE_DATA:
1109                self.active_plots[data_id].replacePlot(data_id, data)
1110                # restore minimized window, if applicable
1111                self.active_plots[data_id].showNormal()
1112            return True
1113        elif data_id in ids_vals:
1114            if data.plot_role != Data1D.ROLE_DATA:
1115                list(self.active_plots.values())[ids_vals.index(data_id)].replacePlot(data_id, data)
1116                self.active_plots[data_id].showNormal()
1117            return True
1118        return False
1119
1120    def chooseFiles(self):
1121        """
1122        Shows the Open file dialog and returns the chosen path(s)
1123        """
1124        # List of known extensions
1125        wlist = self.getWlist()
1126        # Location is automatically saved - no need to keep track of the last dir
1127        # But only with Qt built-in dialog (non-platform native)
1128        kwargs = {
1129            'parent'    : self,
1130            'caption'   : 'Choose files',
1131            'filter'    : wlist,
1132            'options'   : QtWidgets.QFileDialog.DontUseNativeDialog,
1133            'directory' : self.default_load_location
1134        }
1135        paths = QtWidgets.QFileDialog.getOpenFileNames(**kwargs)[0]
1136        if not paths:
1137            return
1138
1139        if not isinstance(paths, list):
1140            paths = [paths]
1141
1142        self.default_load_location = os.path.dirname(paths[0])
1143        return paths
1144
1145    def readData(self, path):
1146        """
1147        verbatim copy-paste from
1148           sasgui.guiframe.local_perspectives.data_loader.data_loader.py
1149        slightly modified for clarity
1150        """
1151        message = ""
1152        log_msg = ''
1153        output = {}
1154        any_error = False
1155        data_error = False
1156        error_message = ""
1157        number_of_files = len(path)
1158        self.communicator.progressBarUpdateSignal.emit(0.0)
1159
1160        for index, p_file in enumerate(path):
1161            basename = os.path.basename(p_file)
1162            _, extension = os.path.splitext(basename)
1163            if extension.lower() in GuiUtils.EXTENSIONS:
1164                any_error = True
1165                log_msg = "Data Loader cannot "
1166                log_msg += "load: %s\n" % str(p_file)
1167                log_msg += """Please try to open that file from "open project" """
1168                log_msg += """or "open analysis" menu\n"""
1169                error_message = log_msg + "\n"
1170                logging.info(log_msg)
1171                continue
1172
1173            try:
1174                message = "Loading Data... " + str(basename) + "\n"
1175
1176                # change this to signal notification in GuiManager
1177                self.communicator.statusBarUpdateSignal.emit(message)
1178
1179                output_objects = self.loader.load(p_file)
1180
1181                # Some loaders return a list and some just a single Data1D object.
1182                # Standardize.
1183                if not isinstance(output_objects, list):
1184                    output_objects = [output_objects]
1185
1186                for item in output_objects:
1187                    # cast sascalc.dataloader.data_info.Data1D into
1188                    # sasgui.guiframe.dataFitting.Data1D
1189                    # TODO : Fix it
1190                    new_data = self.manager.create_gui_data(item, p_file)
1191                    output[new_data.id] = new_data
1192
1193                    # Model update should be protected
1194                    self.mutex.lock()
1195                    self.updateModel(new_data, p_file)
1196                    #self.model.reset()
1197                    QtWidgets.QApplication.processEvents()
1198                    self.mutex.unlock()
1199
1200                    if hasattr(item, 'errors'):
1201                        for error_data in item.errors:
1202                            data_error = True
1203                            message += "\tError: {0}\n".format(error_data)
1204                    else:
1205
1206                        logging.error("Loader returned an invalid object:\n %s" % str(item))
1207                        data_error = True
1208
1209            except Exception as ex:
1210                logging.error(sys.exc_info()[1])
1211
1212                any_error = True
1213            if any_error or error_message != "":
1214                if error_message == "":
1215                    error = "Error: " + str(sys.exc_info()[1]) + "\n"
1216                    error += "while loading Data: \n%s\n" % str(basename)
1217                    error_message += "The data file you selected could not be loaded.\n"
1218                    error_message += "Make sure the content of your file"
1219                    error_message += " is properly formatted.\n\n"
1220                    error_message += "When contacting the SasView team, mention the"
1221                    error_message += " following:\n%s" % str(error)
1222                elif data_error:
1223                    base_message = "Errors occurred while loading "
1224                    base_message += "{0}\n".format(basename)
1225                    base_message += "The data file loaded but with errors.\n"
1226                    error_message = base_message + error_message
1227                else:
1228                    error_message += "%s\n" % str(p_file)
1229
1230            current_percentage = int(100.0* index/number_of_files)
1231            self.communicator.progressBarUpdateSignal.emit(current_percentage)
1232
1233        if any_error or error_message:
1234            logging.error(error_message)
1235            status_bar_message = "Errors occurred while loading %s" % format(basename)
1236            self.communicator.statusBarUpdateSignal.emit(status_bar_message)
1237
1238        else:
1239            message = "Loading Data Complete! "
1240        message += log_msg
1241        # Notify the progress bar that the updates are over.
1242        self.communicator.progressBarUpdateSignal.emit(-1)
1243        self.communicator.statusBarUpdateSignal.emit(message)
1244
1245        return output, message
1246
1247    def getWlist(self):
1248        """
1249        Wildcards of files we know the format of.
1250        """
1251        # Display the Qt Load File module
1252        cards = self.loader.get_wildcards()
1253
1254        # get rid of the wx remnant in wildcards
1255        # TODO: modify sasview loader get_wildcards method, after merge,
1256        # so this kludge can be avoided
1257        new_cards = []
1258        for item in cards:
1259            new_cards.append(item[:item.find("|")])
1260        wlist = ';;'.join(new_cards)
1261
1262        return wlist
1263
1264    def setItemsCheckability(self, model, dimension=None, checked=False):
1265        """
1266        For a given model, check or uncheck all items of given dimension
1267        """
1268        mode = QtCore.Qt.Checked if checked else QtCore.Qt.Unchecked
1269
1270        assert isinstance(checked, bool)
1271
1272        types = (None, Data1D, Data2D)
1273        if not dimension in types:
1274            return
1275
1276        for index in range(model.rowCount()):
1277            item = model.item(index)
1278            if item.isCheckable() and item.checkState() != mode:
1279                data = item.child(0).data()
1280                if dimension is None or isinstance(data, dimension):
1281                    item.setCheckState(mode)
1282
1283            items = list(GuiUtils.getChildrenFromItem(item))
1284
1285            for it in items:
1286                if it.isCheckable() and it.checkState() != mode:
1287                    data = it.child(0).data()
1288                    if dimension is None or isinstance(data, dimension):
1289                        it.setCheckState(mode)
1290
1291    def selectData(self, index):
1292        """
1293        Callback method for modifying the TreeView on Selection Options change
1294        """
1295        if not isinstance(index, int):
1296            msg = "Incorrect type passed to DataExplorer.selectData()"
1297            raise AttributeError(msg)
1298
1299        # Respond appropriately
1300        if index == 0:
1301            self.setItemsCheckability(self.model, checked=True)
1302
1303        elif index == 1:
1304            # De-select All
1305            self.setItemsCheckability(self.model, checked=False)
1306
1307        elif index == 2:
1308            # Select All 1-D
1309            self.setItemsCheckability(self.model, dimension=Data1D, checked=True)
1310
1311        elif index == 3:
1312            # Unselect All 1-D
1313            self.setItemsCheckability(self.model, dimension=Data1D, checked=False)
1314
1315        elif index == 4:
1316            # Select All 2-D
1317            self.setItemsCheckability(self.model, dimension=Data2D, checked=True)
1318
1319        elif index == 5:
1320            # Unselect All 2-D
1321            self.setItemsCheckability(self.model, dimension=Data2D, checked=False)
1322
1323        else:
1324            msg = "Incorrect value in the Selection Option"
1325            # Change this to a proper logging action
1326            raise Exception(msg)
1327
1328    def contextMenu(self):
1329        """
1330        Define actions and layout of the right click context menu
1331        """
1332        # Create a custom menu based on actions defined in the UI file
1333        self.context_menu = QtWidgets.QMenu(self)
1334        self.context_menu.addAction(self.actionDataInfo)
1335        self.context_menu.addAction(self.actionSaveAs)
1336        self.context_menu.addAction(self.actionQuickPlot)
1337        self.context_menu.addSeparator()
1338        self.context_menu.addAction(self.actionQuick3DPlot)
1339        self.context_menu.addAction(self.actionEditMask)
1340        self.context_menu.addSeparator()
1341        self.context_menu.addAction(self.actionFreezeResults)
1342        self.context_menu.addSeparator()
1343        self.context_menu.addAction(self.actionDelete)
1344
1345
1346        # Define the callbacks
1347        self.actionDataInfo.triggered.connect(self.showDataInfo)
1348        self.actionSaveAs.triggered.connect(self.saveDataAs)
1349        self.actionQuickPlot.triggered.connect(self.quickDataPlot)
1350        self.actionQuick3DPlot.triggered.connect(self.quickData3DPlot)
1351        self.actionEditMask.triggered.connect(self.showEditDataMask)
1352        self.actionDelete.triggered.connect(self.deleteSelectedItem)
1353        self.actionFreezeResults.triggered.connect(self.freezeSelectedItems)
1354
1355    def onCustomContextMenu(self, position):
1356        """
1357        Show the right-click context menu in the data treeview
1358        """
1359        index = self.current_view.indexAt(position)
1360        proxy = self.current_view.model()
1361        model = proxy.sourceModel()
1362
1363        if not index.isValid():
1364            return
1365        model_item = model.itemFromIndex(proxy.mapToSource(index))
1366        # Find the mapped index
1367        orig_index = model_item.isCheckable()
1368        if not orig_index:
1369            return
1370        # Check the data to enable/disable actions
1371        is_2D = isinstance(GuiUtils.dataFromItem(model_item), Data2D)
1372        self.actionQuick3DPlot.setEnabled(is_2D)
1373        self.actionEditMask.setEnabled(is_2D)
1374
1375        # Freezing
1376        # check that the selection has inner items
1377        freeze_enabled = False
1378        if model_item.parent() is not None:
1379            freeze_enabled = True
1380        self.actionFreezeResults.setEnabled(freeze_enabled)
1381
1382        # Fire up the menu
1383        self.context_menu.exec_(self.current_view.mapToGlobal(position))
1384
1385    def showDataInfo(self):
1386        """
1387        Show a simple read-only text edit with data information.
1388        """
1389        index = self.current_view.selectedIndexes()[0]
1390        proxy = self.current_view.model()
1391        model = proxy.sourceModel()
1392        model_item = model.itemFromIndex(proxy.mapToSource(index))
1393
1394        data = GuiUtils.dataFromItem(model_item)
1395        if isinstance(data, Data1D):
1396            text_to_show = GuiUtils.retrieveData1d(data)
1397            # Hardcoded sizes to enable full width rendering with default font
1398            self.txt_widget.resize(420,600)
1399        else:
1400            text_to_show = GuiUtils.retrieveData2d(data)
1401            # Hardcoded sizes to enable full width rendering with default font
1402            self.txt_widget.resize(700,600)
1403
1404        self.txt_widget.setReadOnly(True)
1405        self.txt_widget.setWindowFlags(QtCore.Qt.Window)
1406        self.txt_widget.setWindowIcon(QtGui.QIcon(":/res/ball.ico"))
1407        self.txt_widget.setWindowTitle("Data Info: %s" % data.filename)
1408        self.txt_widget.clear()
1409        self.txt_widget.insertPlainText(text_to_show)
1410
1411        self.txt_widget.show()
1412        # Move the slider all the way up, if present
1413        vertical_scroll_bar = self.txt_widget.verticalScrollBar()
1414        vertical_scroll_bar.triggerAction(QtWidgets.QScrollBar.SliderToMinimum)
1415
1416    def saveDataAs(self):
1417        """
1418        Save the data points as either txt or xml
1419        """
1420        index = self.current_view.selectedIndexes()[0]
1421        proxy = self.current_view.model()
1422        model = proxy.sourceModel()
1423        model_item = model.itemFromIndex(proxy.mapToSource(index))
1424
1425        data = GuiUtils.dataFromItem(model_item)
1426        if isinstance(data, Data1D):
1427            GuiUtils.saveData1D(data)
1428        else:
1429            GuiUtils.saveData2D(data)
1430
1431    def quickDataPlot(self):
1432        """
1433        Frozen plot - display an image of the plot
1434        """
1435        index = self.current_view.selectedIndexes()[0]
1436        proxy = self.current_view.model()
1437        model = proxy.sourceModel()
1438        model_item = model.itemFromIndex(proxy.mapToSource(index))
1439
1440        data = GuiUtils.dataFromItem(model_item)
1441
1442        method_name = 'Plotter'
1443        if isinstance(data, Data2D):
1444            method_name='Plotter2D'
1445
1446        self.new_plot = globals()[method_name](self, quickplot=True)
1447        self.new_plot.data = data
1448        #new_plot.plot(marker='o')
1449        self.new_plot.plot()
1450
1451        # Update the global plot counter
1452        title = "Plot " + data.name
1453        self.new_plot.setWindowTitle(title)
1454
1455        # Show the plot
1456        self.new_plot.show()
1457
1458    def quickData3DPlot(self):
1459        """
1460        Slowish 3D plot
1461        """
1462        index = self.current_view.selectedIndexes()[0]
1463        proxy = self.current_view.model()
1464        model = proxy.sourceModel()
1465        model_item = model.itemFromIndex(proxy.mapToSource(index))
1466
1467        data = GuiUtils.dataFromItem(model_item)
1468
1469        self.new_plot = Plotter2D(self, quickplot=True, dimension=3)
1470        self.new_plot.data = data
1471        self.new_plot.plot()
1472
1473        # Update the global plot counter
1474        title = "Plot " + data.name
1475        self.new_plot.setWindowTitle(title)
1476
1477        # Show the plot
1478        self.new_plot.show()
1479
1480    def extShowEditDataMask(self):
1481        self.showEditDataMask()
1482
1483    def showEditDataMask(self, data=None):
1484        """
1485        Mask Editor for 2D plots
1486        """
1487        msg = QtWidgets.QMessageBox()
1488        msg.setIcon(QtWidgets.QMessageBox.Information)
1489        msg.setText("Error: cannot apply mask.\n"+
1490                    "Please select a 2D dataset.")
1491        msg.setStandardButtons(QtWidgets.QMessageBox.Ok)
1492
1493        try:
1494            if data is None or not isinstance(data, Data2D):
1495                # if data wasn't passed - try to get it from
1496                # the currently selected item
1497                index = self.current_view.selectedIndexes()[0]
1498                proxy = self.current_view.model()
1499                model = proxy.sourceModel()
1500                model_item = model.itemFromIndex(proxy.mapToSource(index))
1501
1502                data = GuiUtils.dataFromItem(model_item)
1503
1504            if data is None or not isinstance(data, Data2D):
1505                # If data is still not right, complain
1506                msg.exec_()
1507                return
1508        except:
1509            msg.exec_()
1510            return
1511
1512        mask_editor = MaskEditor(self, data)
1513        # Modal dialog here.
1514        mask_editor.exec_()
1515
1516    def freezeItem(self, item=None):
1517        """
1518        Freeze given item
1519        """
1520        if item is None:
1521            return
1522        self.model.beginResetModel()
1523        new_item = self.cloneTheory(item)
1524        self.model.appendRow(new_item)
1525        self.model.endResetModel()
1526
1527    def freezeDataToItem(self, data=None):
1528        """
1529        Freeze given set of data to main model
1530        """
1531        if data is None:
1532            return
1533        self.model.beginResetModel()
1534        # Append a "unique" descriptor to the name
1535        time_bit = str(time.time())[7:-1].replace('.', '')
1536        new_name = data.name + '_@' + time_bit
1537        # Change the underlying data so it is no longer a theory
1538        try:
1539            data.is_data = True
1540            data.symbol = 'Circle'
1541            data.id = new_name
1542        except AttributeError:
1543            #no data here, pass
1544            pass
1545        new_item = GuiUtils.createModelItemWithPlot(data, new_name)
1546
1547        self.model.appendRow(new_item)
1548        self.model.endResetModel()
1549
1550    def freezeSelectedItems(self):
1551        """
1552        Freeze selected items
1553        """
1554        indices = self.treeView.selectedIndexes()
1555
1556        proxy = self.treeView.model()
1557        model = proxy.sourceModel()
1558
1559        for index in indices:
1560            row_index = proxy.mapToSource(index)
1561            item_to_copy = model.itemFromIndex(row_index)
1562            if item_to_copy and item_to_copy.isCheckable():
1563                self.freezeItem(item_to_copy)
1564
1565    def deleteAllItems(self):
1566        """
1567        Deletes all datasets from both model and theory_model
1568        """
1569        deleted_items = [self.model.item(row) for row in range(self.model.rowCount())
1570                         if self.model.item(row).isCheckable()]
1571        deleted_theory_items = [self.theory_model.item(row)
1572                                for row in range(self.theory_model.rowCount())
1573                                if self.theory_model.item(row).isCheckable()]
1574        deleted_items += deleted_theory_items
1575        deleted_names = [item.text() for item in deleted_items]
1576        deleted_names += deleted_theory_items
1577        # Let others know we deleted data
1578        self.communicator.dataDeletedSignal.emit(deleted_items)
1579        # update stored_data
1580        self.manager.update_stored_data(deleted_names)
1581
1582        # Clear the model
1583        self.model.clear()
1584        self.theory_model.clear()
1585
1586    def deleteSelectedItem(self):
1587        """
1588        Delete the current item
1589        """
1590        # Assure this is indeed wanted
1591        delete_msg = "This operation will delete the selected data sets " +\
1592                     "and all the dependents." +\
1593                     "\nDo you want to continue?"
1594        reply = QtWidgets.QMessageBox.question(self,
1595                                           'Warning',
1596                                           delete_msg,
1597                                           QtWidgets.QMessageBox.Yes,
1598                                           QtWidgets.QMessageBox.No)
1599
1600        if reply == QtWidgets.QMessageBox.No:
1601            return
1602
1603        indices = self.current_view.selectedIndexes()
1604        self.deleteIndices(indices)
1605
1606    def deleteIndices(self, indices):
1607        """
1608        Delete model idices from the current view
1609        """
1610        proxy = self.current_view.model()
1611        model = proxy.sourceModel()
1612
1613        deleted_items = []
1614        deleted_names = []
1615
1616        # Every time a row is removed, the indices change, so we'll just remove
1617        # rows and keep calling selectedIndexes until it returns an empty list.
1618        while len(indices) > 0:
1619            index = indices[0]
1620            row_index = proxy.mapToSource(index)
1621            item_to_delete = model.itemFromIndex(row_index)
1622            if item_to_delete and item_to_delete.isCheckable():
1623                row = row_index.row()
1624
1625                # store the deleted item details so we can pass them on later
1626                deleted_names.append(item_to_delete.text())
1627                deleted_items.append(item_to_delete)
1628
1629                # Delete corresponding open plots
1630                self.closePlotsForItem(item_to_delete)
1631
1632                if item_to_delete.parent():
1633                    # We have a child item - delete from it
1634                    item_to_delete.parent().removeRow(row)
1635                else:
1636                    # delete directly from model
1637                    model.removeRow(row)
1638            indices = self.current_view.selectedIndexes()
1639
1640        # Let others know we deleted data
1641        self.communicator.dataDeletedSignal.emit(deleted_items)
1642
1643        # update stored_data
1644        self.manager.update_stored_data(deleted_names)
1645
1646    def closeAllPlots(self):
1647        """
1648        Close all currently displayed plots
1649        """
1650
1651        for plot_id in PlotHelper.currentPlots():
1652            try:
1653                plotter = PlotHelper.plotById(plot_id)
1654                plotter.close()
1655                self.plot_widgets[plot_id].close()
1656                self.plot_widgets.pop(plot_id, None)
1657            except AttributeError as ex:
1658                logging.error("Closing of %s failed:\n %s" % (plot_id, str(ex)))
1659
1660    def minimizeAllPlots(self):
1661        """
1662        Minimize all currently displayed plots
1663        """
1664        for plot_id in PlotHelper.currentPlots():
1665            plotter = PlotHelper.plotById(plot_id)
1666            plotter.showMinimized()
1667
1668    def closePlotsForItem(self, item):
1669        """
1670        Given standard item, close all its currently displayed plots
1671        """
1672        # item - HashableStandardItems of active plots
1673
1674        # {} -> 'Graph1' : HashableStandardItem()
1675        current_plot_items = {}
1676        for plot_name in PlotHelper.currentPlots():
1677            current_plot_items[plot_name] = PlotHelper.plotById(plot_name).item
1678
1679        # item and its hashable children
1680        items_being_deleted = []
1681        if item.rowCount() > 0:
1682            items_being_deleted = [item.child(n) for n in range(item.rowCount())
1683                                   if isinstance(item.child(n), GuiUtils.HashableStandardItem)]
1684        items_being_deleted.append(item)
1685        # Add the parent in case a child is selected
1686        if isinstance(item.parent(), GuiUtils.HashableStandardItem):
1687            items_being_deleted.append(item.parent())
1688
1689        # Compare plot items and items to delete
1690        plots_to_close = set(current_plot_items.values()) & set(items_being_deleted)
1691
1692        for plot_item in plots_to_close:
1693            for plot_name in current_plot_items.keys():
1694                if plot_item == current_plot_items[plot_name]:
1695                    plotter = PlotHelper.plotById(plot_name)
1696                    # try to delete the plot
1697                    try:
1698                        plotter.close()
1699                        #self.parent.workspace().removeSubWindow(plotter)
1700                        self.plot_widgets[plot_name].close()
1701                        self.plot_widgets.pop(plot_name, None)
1702                    except AttributeError as ex:
1703                        logging.error("Closing of %s failed:\n %s" % (plot_name, str(ex)))
1704
1705        pass # debugger anchor
1706
1707    def onAnalysisUpdate(self, new_perspective=""):
1708        """
1709        Update the perspective combo index based on passed string
1710        """
1711        assert new_perspective in Perspectives.PERSPECTIVES.keys()
1712        self.cbFitting.blockSignals(True)
1713        self.cbFitting.setCurrentIndex(self.cbFitting.findText(new_perspective))
1714        self.cbFitting.blockSignals(False)
1715        pass
1716
1717    def loadComplete(self, output):
1718        """
1719        Post message to status bar and update the data manager
1720        """
1721        assert isinstance(output, tuple)
1722
1723        # Reset the model so the view gets updated.
1724        #self.model.reset()
1725        self.communicator.progressBarUpdateSignal.emit(-1)
1726
1727        output_data = output[0]
1728        message = output[1]
1729        # Notify the manager of the new data available
1730        self.communicator.statusBarUpdateSignal.emit(message)
1731        self.communicator.fileDataReceivedSignal.emit(output_data)
1732        self.manager.add_data(data_list=output_data)
1733
1734    def loadFailed(self, reason):
1735        print("File Load Failed with:\n", reason)
1736        pass
1737
1738    def updateModel(self, data, p_file):
1739        """
1740        Add data and Info fields to the model item
1741        """
1742        # Structure of the model
1743        # checkbox + basename
1744        #     |-------> Data.D object
1745        #     |-------> Info
1746        #                 |----> Title:
1747        #                 |----> Run:
1748        #                 |----> Type:
1749        #                 |----> Path:
1750        #                 |----> Process
1751        #                          |-----> process[0].name
1752        #     |-------> THEORIES
1753
1754        # Top-level item: checkbox with label
1755        checkbox_item = GuiUtils.HashableStandardItem()
1756        checkbox_item.setCheckable(True)
1757        checkbox_item.setCheckState(QtCore.Qt.Checked)
1758        if p_file is not None:
1759            checkbox_item.setText(os.path.basename(p_file))
1760
1761        # Add the actual Data1D/Data2D object
1762        object_item = GuiUtils.HashableStandardItem()
1763        object_item.setData(data)
1764
1765        checkbox_item.setChild(0, object_item)
1766
1767        # Add rows for display in the view
1768        info_item = GuiUtils.infoFromData(data)
1769
1770        # Set info_item as the first child
1771        checkbox_item.setChild(1, info_item)
1772
1773        # Caption for the theories
1774        checkbox_item.setChild(2, QtGui.QStandardItem("FIT RESULTS"))
1775
1776        # New row in the model
1777        self.model.beginResetModel()
1778        self.model.appendRow(checkbox_item)
1779        self.model.endResetModel()
1780
1781    def updateModelFromPerspective(self, model_item):
1782        """
1783        Receive an update model item from a perspective
1784        Make sure it is valid and if so, replace it in the model
1785        """
1786        # Assert the correct type
1787        if not isinstance(model_item, QtGui.QStandardItem):
1788            msg = "Wrong data type returned from calculations."
1789            raise AttributeError(msg)
1790
1791        # send in the new item
1792        self.model.appendRow(model_item)
1793        pass
1794
1795    def updateTheoryFromPerspective(self, model_item):
1796        """
1797        Receive an update theory item from a perspective
1798        Make sure it is valid and if so, replace/add in the model
1799        """
1800        # Assert the correct type
1801        if not isinstance(model_item, QtGui.QStandardItem):
1802            msg = "Wrong data type returned from calculations."
1803            raise AttributeError(msg)
1804
1805        # Check if there are any other items for this tab
1806        # If so, delete them
1807        current_tab_name = model_item.text()
1808        for current_index in range(self.theory_model.rowCount()):
1809            if current_tab_name == self.theory_model.item(current_index).text():
1810                self.theory_model.removeRow(current_index)
1811                break
1812        # send in the new item
1813        self.theory_model.appendRow(model_item)
1814
1815    def deleteIntermediateTheoryPlotsByModelID(self, model_id):
1816        """Given a model's ID, deletes all items in the theory item model which reference the same ID. Useful in the
1817        case of intermediate results disappearing when changing calculations (in which case you don't want them to be
1818        retained in the list)."""
1819        items_to_delete = []
1820        for r in range(self.theory_model.rowCount()):
1821            item = self.theory_model.item(r, 0)
1822            data = item.child(0).data()
1823            if not hasattr(data, "id"):
1824                return
1825            match = GuiUtils.theory_plot_ID_pattern.match(data.id)
1826            if match:
1827                item_model_id = match.groups()[-1]
1828                if item_model_id == model_id:
1829                    # Only delete those identified as an intermediate plot
1830                    if match.groups()[2] not in (None, ""):
1831                        items_to_delete.append(item)
1832
1833        for item in items_to_delete:
1834            self.theory_model.removeRow(item.row())
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