ENH: Fixed an issue which was caused by adding another column to stud…

…iesView (issue SlicerProstate#116)

- when selecting study and going to segmentation step and then going back to data selection the same study should be reloaded into the series view which did not work since the studiesView selection changed to none
- when data directory has been selected, studies view is set to collapsed =  False

mpReview.py

@@ -63,6 +63,7 @@ def inputDataDir(self, directory):
     self.dataDirButton.caption = directory
     self.informationWatchBox.setInformation("CurrentDataDir", truncatedPath, toolTip=directory)
     if directory:
+      self.studiesGroupBox.collapsed = False
       self.setSetting('InputLocation', directory)
       self.checkAndSetLUT()
       self.updateStudyTable()
@@ -1023,8 +1024,9 @@ def onStep1Selected(self):
 
     self.updateStudyStatus()
 
-    if len(self.studiesView.selectedIndexes()) > 0:
-      self.onStudySelected(self.studiesView.selectedIndexes()[0])
+    if self.currentSelectedStudyIndex:
+      self.selectStudyModelIndex(self.currentSelectedStudyIndex)
+      self.onStudySelected(self.currentSelectedStudyIndex)
     self.updateSegmentationTabAvailability()
     self.setTabsEnabled([2], False)
     return True
@@ -1067,6 +1069,7 @@ def notifyUserAboutMissingEligibleData(self):
         self.notificationDialog("No DICOM data could be processed. Please select another directory.")
 
   def fillStudyTable(self):
+    self.currentSelectedStudyIndex = None
     studyItems = []
     self.seriesModel.clear()
     dirs = self.logic.getStudyNames(self.inputDataDir)
@@ -1085,8 +1088,11 @@ def fillStudyTable(self):
     self.studiesView.horizontalHeader().setResizeMode(0, qt.QHeaderView.Stretch)
     if len(studyItems) == 1:
       modelIndex = self.studiesModel.index(0,0)
-      self.studiesView.selectionModel().setCurrentIndex(modelIndex, self.studiesView.selectionModel().Select)
-      self.studiesView.selectionModel().select(modelIndex, self.studiesView.selectionModel().Select)
+      self.selectStudyModelIndex(modelIndex)
+
+  def selectStudyModelIndex(self, modelIndex):
+    self.studiesView.selectionModel().setCurrentIndex(modelIndex, self.studiesView.selectionModel().Select)
+    self.studiesView.selectionModel().select(modelIndex, self.studiesView.selectionModel().Select)
 
   def hasStudyBeenProcessed(self, directory):
     resourcesDir = os.path.join(directory,'RESOURCES')
@@ -1123,6 +1129,7 @@ def updateProgressBar(self, **kwargs):
     ModuleWidgetMixin.updateProgressBar(self, progress=self.progress, **kwargs)
 
   def onStudySelected(self, modelIndex):
+    self.currentSelectedStudyIndex = modelIndex
     self.studiesGroupBox.collapsed = True
     logging.debug('Row selected: '+self.studiesModel.item(modelIndex.row(),0).text())
     selectionModel = self.studiesView.selectionModel()