source: sasview/src/sas/qtgui/Perspectives/Invariant/InvariantPerspective.py @ 895e7359

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 895e7359 was 895e7359, checked in by Piotr Rozyczko <rozyczko@…>, 7 years ago

Converted more syntax not covered by 2to3
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1# global
2import sys
3import os
4from PyQt4 import QtCore
5from PyQt4 import QtGui
6from PyQt4 import QtWebKit
7
8from twisted.internet import threads
9from twisted.internet import reactor
10
11# sas-global
12from sas.sascalc.invariant import invariant
13from sas.qtgui.Plotting.PlotterData import Data1D
14import sas.qtgui.Utilities.GuiUtils as GuiUtils
15
16# local
17from .UI.TabbedInvariantUI import Ui_tabbedInvariantUI
18from .InvariantDetails import DetailsDialog
19from .InvariantUtils import WIDGETS
20
21# The minimum q-value to be used when extrapolating
22Q_MINIMUM = 1e-5
23# The maximum q-value to be used when extrapolating
24Q_MAXIMUM = 10
25# the ratio of maximum q value/(qmax of data) to plot the theory data
26Q_MAXIMUM_PLOT = 3
27
28
29class MyModel(object):
30    def __init__(self):
31        self._model = QtGui.QStandardItemModel(self)
32
33    def addItem(self, item):
34        item = QtGui.QStandardItem(str(item))
35        self._model.appendRow(item)
36
37class InvariantWindow(QtGui.QDialog, Ui_tabbedInvariantUI):
38    # The controller which is responsible for managing signal slots connections
39    # for the gui and providing an interface to the data model.
40    name = "Invariant" # For displaying in the combo box
41    #def __init__(self, manager=None, parent=None):
42    def __init__(self, parent=None):
43        #super(InvariantWindow, self).__init__(parent)
44        super(InvariantWindow, self).__init__()
45        self.setupUi(self)
46
47        self.setWindowTitle("Invariant Perspective")
48
49        # initial input params
50        self._background = 0.0
51        self._scale = 1.0
52        self._contrast = 1.0
53        self._porod = 1.0
54        self._npoints_low = 10
55        self._npoints_high = 10
56        self._power_low = 4
57
58        self._manager = parent
59        #self._manager = manager
60        self._reactor = reactor
61        self._model_item = QtGui.QStandardItem()
62
63        self._helpView = QtWebKit.QWebView()
64        self.detailsDialog = DetailsDialog(self)
65
66        self._low_extrapolate = False
67        self._low_guinier  = True
68        self._low_fit  = True
69        self._high_extrapolate = False
70        self._high_power_value  = False
71
72        # no reason to have this widget resizable
73        self.setFixedSize(self.minimumSizeHint())
74
75        self.communicate = GuiUtils.Communicate()
76
77        self._data = None
78        self._path = ""
79
80        self._allow_close = False
81
82        # Mask file selector
83        ###################################################
84        #self._path = "cyl_400_20.txt"
85        #from sas.sascalc.dataloader.loader import  Loader
86        #loader = Loader()
87        #try:
88        #    self._data = loader.load(self._path)
89        #except:
90        #    raise
91        ###################################################
92
93        self.lineEdit_8.setText(str(Q_MINIMUM))
94        self.lineEdit_9.setText(str(Q_MAXIMUM))
95
96        # Let's choose the Standard Item Model.
97        self.model = QtGui.QStandardItemModel(self)
98
99        # Connect buttons to slots.
100        # Needs to be done early so default values propagate properly.
101        self.setupSlots()
102
103        # Set up the model.
104        self.setupModel()
105
106        # Set up the mapper
107        self.setupMapper()
108
109        new_font = 'font-family: -apple-system, "Helvetica Neue", "Ubuntu";'
110        self.label_2.setStyleSheet(new_font)
111        self.label_24.setStyleSheet(new_font)
112        self.label_27.setStyleSheet(new_font)
113
114    def setClosable(self, value=True):
115        """
116        Allow outsiders close this widget
117        """
118        assert isinstance(value, bool)
119
120        self._allow_close = value
121
122    def closeEvent(self, event):
123        """
124        Overwrite QDialog close method to allow for custom widget close
125        """
126        if self._allow_close:
127            # reset the closability flag
128            self.setClosable(value=False)
129            event.accept()
130        else:
131            event.ignore()
132            # Maybe we should just minimize
133            self.setWindowState(QtCore.Qt.WindowMinimized)
134
135    def communicator(self):
136        """ Getter for the communicator """
137        return self.communicate
138
139    def updateFromModel(self):
140        """
141        update the globals based on the data in the model
142        """
143        self._background = float(self.model.item(WIDGETS.W_BACKGROUND).text())
144        self._contrast   = float(self.model.item(WIDGETS.W_CONTRAST).text())
145        self._scale      = float(self.model.item(WIDGETS.W_SCALE).text())
146
147        # High extrapolate
148        self._low_extrapolate = ( str(self.model.item(WIDGETS.W_ENABLE_LOWQ).text()) == 'true')
149        self._low_points = float(self.model.item(WIDGETS.W_NPTS_LOWQ).text())
150        self._low_guinier  = ( str(self.model.item(WIDGETS.W_LOWQ_GUINIER).text()) == 'true')
151        self._low_fit  = ( str(self.model.item(WIDGETS.W_LOWQ_FIT).text()) == 'true')
152        self._low_power_value  = float(self.model.item(WIDGETS.W_LOWQ_POWER_VALUE).text())
153
154        # High extrapolating
155        self._high_extrapolate = ( str(self.model.item(WIDGETS.W_ENABLE_HIGHQ).text()) == 'true')
156        self._high_points  = float(self.model.item(WIDGETS.W_NPTS_HIGHQ).text())
157        self._high_fit  = ( str(self.model.item(WIDGETS.W_HIGHQ_FIT).text()) == 'true')
158        self._high_power_value  = float(self.model.item(WIDGETS.W_HIGHQ_POWER_VALUE).text())
159
160    def calculateInvariant(self):
161        """
162        Use twisted to thread the calculations away.
163        """
164        # Find out if extrapolation needs to be used.
165        extrapolation = None
166        if self._low_extrapolate  and not self._high_extrapolate:
167            extrapolation = "low"
168        elif not self._low_extrapolate  and self._high_extrapolate:
169            extrapolation = "high"
170        elif self._low_extrapolate and self._high_extrapolate:
171            extrapolation = "both"
172        try:
173            # modify the Calculate button to indicate background process
174            self.pushButton.setText("Calculating...")
175            self.pushButton.setEnabled(False)
176            self.style = self.pushButton.styleSheet()
177            self.pushButton.setStyleSheet("background-color: rgb(255, 255, 0); color: rgb(0, 0, 0)")
178            # Send the calculations to separate thread.
179            d = threads.deferToThread(self.calculateThread, extrapolation)
180            # Add deferred callback for call return
181            d.addCallback(self.plotResult)
182        except Exception as ex:
183            # Set the button back to available
184            self.pushButton.setEnabled(True)
185            self.pushButton.setText("Calculate")
186            self.pushButton.setStyleSheet(self.style)
187
188
189    def plotResult(self, model):
190        """
191        """
192        self.model = model
193        self.mapper.toFirst()
194
195        # Set the button back to available
196        self.pushButton.setEnabled(True)
197        self.pushButton.setText("Calculate")
198        self.pushButton.setStyleSheet(self.style)
199
200        # Send the modified model item to DE for keeping in the model
201        self.communicate.updateModelFromPerspectiveSignal.emit(self._model_item)
202
203
204    def calculateThread(self, extrapolation):
205        """
206        Perform Invariant calculations.
207
208        TODO: Create a dictionary of results to be sent to DE on completion.
209        """
210        self.updateFromModel()
211
212        qstar_low = 0.0
213        qstar_low_err = 0.0
214        qstar_high = 0.0
215        qstar_high_err = 0.0
216        qstar_total = 0.0
217        qstar_total_low_err = 0.0
218
219        # Prepare the invariant object
220        inv = invariant.InvariantCalculator(data=self._data,
221                                            background = self._background,
222                                            scale = self._scale)
223
224        if self._low_extrapolate:
225            function_low = "power_law"
226            if self._low_guinier:
227                function_low = "guinier"
228            if self._low_fit:
229                self._low_power_value = None
230            inv.set_extrapolation(range="low",
231                                  npts=self._low_points,
232                                  function=function_low,
233                                  power=self._low_power_value)
234
235        if self._high_extrapolate:
236            function_low = "power_law"
237            inv.set_extrapolation(range="high",
238                                  npts=self._high_points,
239                                  function=function_low,
240                                  power=self._low_power_value)
241
242        #Compute invariant
243        # TODO: proper exception handling and logic -
244        # display info, update lineedits, don't run extrapolations etc.
245        calculation_failed = False
246        try:
247            qstar_total, qstar_total_error         = inv.get_qstar_with_error()
248        except Exception as ex:
249            calculation_failed = True
250            # Display relevant information
251            item = QtGui.QStandardItem("ERROR")
252            self.model.setItem(WIDGETS.W_INVARIANT, item)
253            item = QtGui.QStandardItem("ERROR")
254            self.model.setItem(WIDGETS.W_INVARIANT_ERR, item)
255        try:
256            volume_fraction, volume_fraction_error = \
257                inv.get_volume_fraction_with_error(self._contrast)
258        except Exception as ex:
259            calculation_failed = True
260            # Display relevant information
261            item = QtGui.QStandardItem("ERROR")
262            self.model.setItem(WIDGETS.W_VOLUME_FRACTION, item)
263            item = QtGui.QStandardItem("ERROR")
264            self.model.setItem(WIDGETS.W_VOLUME_FRACTION_ERR, item)
265        try:
266            surface, surface_error = \
267                inv.get_surface_with_error(self._contrast, self._porod)
268        except Exception as ex:
269            calculation_failed = True
270            # Display relevant information
271            item = QtGui.QStandardItem("ERROR")
272            self.model.setItem(WIDGETS.W_SPECIFIC_SURFACE, item)
273            item = QtGui.QStandardItem("ERROR")
274            self.model.setItem(WIDGETS.W_SPECIFIC_SURFACE_ERR, item)
275
276        if(calculation_failed):
277            # TODO: NOTIFY THE GUI MANAGER!!
278            self.mapper.toFirst()
279            return self.model
280
281        if self._low_extrapolate:
282            # for presentation in InvariantDetails
283            qstar_low, qstar_low_err = inv.get_qstar_low()
284            extrapolated_data = inv.get_extra_data_low(self._low_points)
285            power_low = inv.get_extrapolation_power(range='low')
286
287            #inv.data = extrapolated_data
288            #qstar_total, qstar_total_error = inv.get_qstar_with_error()
289
290            # Plot the chart
291            title = "Low-Q extrapolation"
292
293            # Convert the data into plottable
294            extrapolated_data = self._manager.createGuiData(extrapolated_data)
295            extrapolated_data.name = title
296            extrapolated_data.title = title
297
298            # Add the plot to the model item
299            # This needs to run in the main thread
300            reactor.callFromThread(GuiUtils.updateModelItemWithPlot,
301                    self._model_item, extrapolated_data, title)
302
303        if self._high_extrapolate:
304            # for presentation in InvariantDetails
305            qmax_plot = Q_MAXIMUM_PLOT * max(self._data.x)
306            if qmax_plot > Q_MAXIMUM:
307                qmax_plot = Q_MAXIMUM
308            qstar_high, qstar_high_err = inv.get_qstar_high()
309            power_high = inv.get_extrapolation_power(range='high')
310            high_out_data = inv.get_extra_data_high(q_end=qmax_plot, npts=500)
311
312            # Plot the chart
313            title = "High-Q extrapolation"
314
315            # Convert the data into plottable
316            high_out_data = self._manager.createGuiData(high_out_data)
317            high_out_data.name = title
318            high_out_data.title = title
319
320            # Add the plot to the model item
321            # This needs to run in the main thread
322            reactor.callFromThread(GuiUtils.updateModelItemWithPlot,
323                    self._model_item, high_out_data, title)
324
325        item = QtGui.QStandardItem(str(float('%.5g'% volume_fraction)))
326        self.model.setItem(WIDGETS.W_VOLUME_FRACTION, item)
327        item = QtGui.QStandardItem(str(float('%.5g'% volume_fraction_error)))
328        self.model.setItem(WIDGETS.W_VOLUME_FRACTION_ERR, item)
329        item = QtGui.QStandardItem(str(float('%.5g'% surface)))
330        self.model.setItem(WIDGETS.W_SPECIFIC_SURFACE, item)
331        item = QtGui.QStandardItem(str(float('%.5g'% surface_error)))
332        self.model.setItem(WIDGETS.W_SPECIFIC_SURFACE_ERR, item)
333        item = QtGui.QStandardItem(str(float('%.5g'% qstar_total)))
334        self.model.setItem(WIDGETS.W_INVARIANT, item)
335        item = QtGui.QStandardItem(str(float('%.5g'% qstar_total_error)))
336        self.model.setItem(WIDGETS.W_INVARIANT_ERR, item)
337
338        #item = QtGui.QStandardItem(str(float('%.5g'% qstar_total)))
339        #self.model.setItem(WIDGETS.D_TOTAL_QSTAR, item)
340        #item = QtGui.QStandardItem(str(float('%.5g'% qstar_total_err)))
341        #self.model.setItem(WIDGETS.D_TOTAL_QSTAR_ERR, item)
342        item = QtGui.QStandardItem(str(float('%.5g'% qstar_low)))
343        self.model.setItem(WIDGETS.D_LOW_QSTAR, item)
344        item = QtGui.QStandardItem(str(float('%.5g'% qstar_low_err)))
345        self.model.setItem(WIDGETS.D_LOW_QSTAR_ERR, item)
346        item = QtGui.QStandardItem(str(float('%.5g'% qstar_high)))
347        self.model.setItem(WIDGETS.D_HIGH_QSTAR, item)
348        item = QtGui.QStandardItem(str(float('%.5g'% qstar_high_err)))
349        self.model.setItem(WIDGETS.D_HIGH_QSTAR_ERR, item)
350
351        self.mapper.toFirst()
352
353        return self.model
354               
355    def title(self):
356        """
357        Perspective name
358        """
359        return "Invariant panel"
360
361    def status(self):
362        """
363        """
364        self.detailsDialog.setModel(self.model)
365        self.detailsDialog.showDialog()
366
367    def help(self):
368        """
369        """
370        _TreeLocation = GuiUtils.HELP_DIRECTORY_LOCATION + \
371            "/user/sasgui/perspectives/invariant/invariant_help.html"
372        self._helpView.load(QtCore.QUrl(_TreeLocation))
373        self._helpView.show()
374
375    def setupSlots(self):
376        self.pushButton.clicked.connect(self.calculateInvariant)
377        self.pushButton_2.clicked.connect(self.status)
378        self.pushButton_3.clicked.connect(self.help)
379
380        self.radioButton.toggled.connect(self.lowGuinierAndPowerToggle)
381        self.radioButton_8.toggled.connect(self.hiFitAndFixToggle)
382
383        self.radioButton_3.toggled.connect(self.lowFitAndFixToggle)
384
385        # Bug workaround for QDataWidgetMapper() not reacting to checkbox clicks.
386        # https://bugreports.qt.io/browse/QTBUG-1818
387        self.checkBox.clicked.connect(self.setFocus)
388        self.checkBox_2.clicked.connect(self.setFocus)
389
390        self.model.itemChanged.connect(self.modelChanged)
391
392    def modelChanged(self, item):
393        """
394        """
395        if item.row() == WIDGETS.W_ENABLE_LOWQ:
396            toggle = (str(item.text()) == 'true')
397            self._low_extrapolate = toggle
398            self.lowQToggle(toggle)
399        elif item.row() == WIDGETS.W_ENABLE_HIGHQ:
400            toggle = (str(item.text()) == 'true')
401            self._high_extrapolate = toggle
402            self.highQToggle(toggle)
403       
404    def lowGuinierAndPowerToggle(self, toggle):
405        """
406        """
407        self._low_guinier = toggle
408        toggle = not toggle
409        self.lineEdit_11.setEnabled(toggle)
410        self.radioButton_3.setEnabled(toggle)
411        self.radioButton_4.setEnabled(toggle)
412        self.lineEdit_11.setEnabled(toggle and (not self._low_fit))
413
414    def lowFitAndFixToggle(self, toggle):
415        """
416        """
417        self._low_fit = toggle
418        toggle = not toggle
419        self.lineEdit_11.setEnabled(toggle)
420
421    def hiFitAndFixToggle(self, toggle):
422        """
423        """
424        self.lineEdit_13.setEnabled(toggle)
425
426    def highQToggle(self, clicked):
427        """
428        Disable/enable High Q extrapolation
429        """
430        self.radioButton_7.setEnabled(clicked)
431        self.radioButton_8.setEnabled(clicked)
432        self.lineEdit_12.setEnabled(clicked)
433        self.lineEdit_13.setEnabled(clicked)
434
435    def lowQToggle(self, clicked):
436        """
437        Disable/enable Low Q extrapolation
438        """
439        self.radioButton.setEnabled(clicked)
440        self.radioButton_2.setEnabled(clicked)
441        self.lineEdit_11.setEnabled(clicked and not self._low_fit)
442
443        # Enable subelements
444        self.radioButton_3.setEnabled(clicked and not self._low_guinier)
445        self.radioButton_4.setEnabled(clicked and not self._low_guinier)
446        self.lineEdit_10.setEnabled(clicked and not self._low_guinier)
447
448    def setupModel(self):
449
450        # filename
451        item = QtGui.QStandardItem(self._path)
452        self.model.setItem(WIDGETS.W_FILENAME, item)
453
454        # add Q parameters to the model
455        #qmin = min(self._data.x)
456        qmin = 0.0
457        item = QtGui.QStandardItem(str(qmin))
458        self.model.setItem(WIDGETS.W_QMIN, item)
459        qmax = 0.0
460        item = QtGui.QStandardItem(str(qmax))
461        self.model.setItem(WIDGETS.W_QMAX, item)
462
463        # add custom input params
464        item = QtGui.QStandardItem(str(self._background))
465        self.model.setItem(WIDGETS.W_BACKGROUND, item)
466        item = QtGui.QStandardItem(str(self._contrast))
467        self.model.setItem(WIDGETS.W_CONTRAST, item)
468        item = QtGui.QStandardItem(str(self._scale))
469        self.model.setItem(WIDGETS.W_SCALE, item)
470       
471        # Dialog elements
472        itemf = QtGui.QStandardItem("false")
473        self.model.setItem(WIDGETS.W_ENABLE_HIGHQ, itemf)
474        itemf = QtGui.QStandardItem("false")
475        self.model.setItem(WIDGETS.W_ENABLE_LOWQ, itemf)
476
477        item = QtGui.QStandardItem(str(self._npoints_low))
478        self.model.setItem(WIDGETS.W_NPTS_LOWQ, item)
479        item = QtGui.QStandardItem(str(self._npoints_high))
480        self.model.setItem(WIDGETS.W_NPTS_HIGHQ, item)
481
482        itemt = QtGui.QStandardItem("true")
483        self.model.setItem(WIDGETS.W_LOWQ_GUINIER, itemt)
484
485        itemt = QtGui.QStandardItem("true")
486        self.model.setItem(WIDGETS.W_LOWQ_FIT, itemt)
487        item = QtGui.QStandardItem(str(self._power_low))
488        self.model.setItem(WIDGETS.W_LOWQ_POWER_VALUE, item)
489
490        itemt = QtGui.QStandardItem("true")
491        self.model.setItem(WIDGETS.W_HIGHQ_FIT, itemt)
492        item = QtGui.QStandardItem(str(self._power_low))
493        self.model.setItem(WIDGETS.W_HIGHQ_POWER_VALUE, item)
494
495
496    def setupMapper(self):
497        # Set up the mapper.
498        self.mapper = QtGui.QDataWidgetMapper(self)
499        self.mapper.setOrientation(QtCore.Qt.Vertical)
500        self.mapper.setModel(self.model)
501
502        # Set up the view on the model for testing
503        # self.tableView.setModel(self.model)
504
505        # Filename
506        self.mapper.addMapping(self.lineEdit, WIDGETS.W_FILENAME)
507        # Qmin/Qmax
508        self.mapper.addMapping(self.lineEdit_2, WIDGETS.W_QMIN)
509        self.mapper.addMapping(self.lineEdit_3, WIDGETS.W_QMAX)
510
511        # Background
512        self.mapper.addMapping(self.lineEdit_4, WIDGETS.W_BACKGROUND)
513        # Scale
514        self.mapper.addMapping(self.lineEdit_5, WIDGETS.W_SCALE)
515        # Contrast
516        self.mapper.addMapping(self.lineEdit_6, WIDGETS.W_CONTRAST)
517
518        # Lowq/Highq items
519        self.mapper.addMapping(self.checkBox, WIDGETS.W_ENABLE_LOWQ)
520        self.mapper.addMapping(self.checkBox_2, WIDGETS.W_ENABLE_HIGHQ)
521
522        self.mapper.addMapping(self.lineEdit_10, WIDGETS.W_NPTS_LOWQ)
523        self.mapper.addMapping(self.radioButton, WIDGETS.W_LOWQ_GUINIER)
524
525        self.mapper.addMapping(self.radioButton_3, WIDGETS.W_LOWQ_FIT)
526        self.mapper.addMapping(self.lineEdit_11, WIDGETS.W_LOWQ_POWER_VALUE)
527
528        self.mapper.addMapping(self.radioButton_7, WIDGETS.W_HIGHQ_FIT)
529        self.mapper.addMapping(self.lineEdit_13, WIDGETS.W_HIGHQ_POWER_VALUE)
530   
531        # Output
532        self.mapper.addMapping(self.lineEdit_14, WIDGETS.W_VOLUME_FRACTION)
533        self.mapper.addMapping(self.lineEdit_15, WIDGETS.W_VOLUME_FRACTION_ERR)
534        self.mapper.addMapping(self.lineEdit_16, WIDGETS.W_SPECIFIC_SURFACE)
535        self.mapper.addMapping(self.lineEdit_17, WIDGETS.W_SPECIFIC_SURFACE_ERR)
536        self.mapper.addMapping(self.lineEdit_19, WIDGETS.W_INVARIANT)
537        self.mapper.addMapping(self.lineEdit_18, WIDGETS.W_INVARIANT_ERR)
538
539        self.mapper.toFirst()
540
541    def setData(self, data_item, is_batch=False):
542        """
543        Obtain a QStandardItem object and dissect it to get Data1D/2D
544        Pass it over to the calculator
545        """
546        if not isinstance(data_item, list):
547            msg = "Incorrect type passed to the Invariant Perspective"
548            raise AttributeError(msg)
549
550        if not isinstance(data_item[0], QtGui.QStandardItem):
551            msg = "Incorrect type passed to the Invariant Perspective"
552            raise AttributeError(msg)
553
554        self._model_item = data_item[0]
555
556        # Extract data on 1st child - this is the Data1D/2D component
557        data = GuiUtils.dataFromItem(self._model_item)
558        self.model.item(WIDGETS.W_FILENAME).setData(self._model_item.text())
559
560        ##### DEBUG ####
561        # set data in the debug tree view window
562        self.treeView.setModel(self.model)
563
564        self.calculate(data_list=[data])
565       
566    def calculate(self, data_list=None):
567        """
568        receive a list of data and compute invariant
569
570        TODO: pass warnings/messages to log
571        """
572        msg = ""
573        data = None
574        if data_list is None:
575            data_list = []
576        if len(data_list) >= 1:
577            if len(data_list) == 1:
578                data = data_list[0]
579            else:
580                data_1d_list = []
581                data_2d_list = []
582                error_msg = ""
583                # separate data into data1d and data2d list
584                for data in data_list:
585                    if data is not None:
586                        if issubclass(data.__class__, Data1D):
587                            data_1d_list.append(data)
588                        else:
589                            error_msg += " %s  type %s \n" % (str(data.name),
590                                                              str(data.__class__.__name__))
591                            data_2d_list.append(data)
592                if len(data_2d_list) > 0:
593                    msg = "Invariant does not support the following data types:\n"
594                    msg += error_msg
595                if len(data_1d_list) == 0:
596                    # remake this as a qt event
597                    #wx.PostEvent(self.parent, StatusEvent(status=msg, info='error'))
598                    return
599
600                # TODO: add msgbox for data choice
601                #msg += "Invariant panel does not allow multiple data!\n"
602                #msg += "Please select one.\n"
603                #if len(data_list) > 1:
604                    #from invariant_widgets import DataDialog
605                    #dlg = DataDialog(data_list=data_1d_list, text=msg)
606                    #if dlg.ShowModal() == wx.ID_OK:
607                    #    data = dlg.get_data()
608                    #else:
609                    #    data = None
610                    #dlg.Destroy()
611
612            if data is None:
613                msg += "invariant receives no data. \n"
614                #wx.PostEvent(self.parent, StatusEvent(status=msg, info='error'))
615                return
616            if not issubclass(data.__class__, Data1D):
617                msg += "invariant cannot be computed for data of "
618                msg += "type %s\n" % (data.__class__.__name__)
619                #wx.PostEvent(self.parent, StatusEvent(status=msg, info='error'))
620                return
621            else:
622                #wx.PostEvent(self.parent, NewPlotEvent(plot=data, title=data.title))
623                try:
624                    self._data = data
625                    self._path = "unique path"
626                    self.calculateInvariant()
627                except:
628                    msg = "Invariant Set_data: " + str(sys.exc_info()[1])
629                    #wx.PostEvent(self.parent, StatusEvent(status=msg, info="error"))
630        else:
631            msg = "invariant cannot be computed for data of "
632            msg += "type %s" % (data.__class__.__name__)
633            #wx.PostEvent(self.parent, StatusEvent(status=msg, info='error'))
634
635    def allowBatch(self):
636        """
637        Tell the caller that we don't accept multiple data instances
638        """
639        return False
640
641if __name__ == "__main__":
642    app = QtGui.QApplication([])
643    import qt4reactor
644    qt4reactor.install()
645    # DO NOT move the following import to the top!
646    # (unless you know what you're doing)
647    from twisted.internet import reactor
648    dlg = InvariantWindow(reactor)
649    dlg.show()
650    reactor.run()
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