Implemented Close Project functionality

docs/sphinx-docs/source/user/menu_bar.rst

@@ -15,6 +15,8 @@ onto Data Explorer.
 
 A *SasView* session can also be saved and reloaded as an 'Analysis' (an individual model fit or invariant 
 calculation, etc), or as a 'Project' (everything you have done since starting your *SasView* session).
+Finally, a session can be closed so a new project can be created. This will clear all plots, data and
+content in all the perspectives, even those which are not currently visible.
 
 Edit
 ----

src/sas/qtgui/MainWindow/DataExplorer.py

@@ -2150,3 +2150,12 @@ def setCheckItems(self, status=QtCore.Qt.Unchecked):
             if item.isCheckable():
                 item.setCheckState(status)
         model.blockSignals(False)
+
+    def reset(self):
+        """
+        Reset the data explorer to an empty state
+        """
+        self.closeAllPlots()
+        self.model.clear()
+        self.theory_model.clear()
+

src/sas/qtgui/MainWindow/GuiManager.py

@@ -8,7 +8,7 @@
 from packaging.version import Version
 from PySide6.QtCore import QLocale, Qt
 from PySide6.QtGui import QStandardItem
-from PySide6.QtWidgets import QDockWidget, QLabel, QProgressBar, QTextBrowser
+from PySide6.QtWidgets import QDockWidget, QLabel, QMessageBox, QProgressBar, QTextBrowser
 from twisted.internet import reactor
 
 import sas
@@ -706,6 +706,7 @@ def addTriggers(self):
         self._workspace.actionOpen_Analysis.triggered.connect(self.actionOpen_Analysis)
         self._workspace.actionSave.triggered.connect(self.actionSave_Project)
         self._workspace.actionSave_Analysis.triggered.connect(self.actionSave_Analysis)
+        self._workspace.actionClose_Project.triggered.connect(self.actionClose_Project)
         self._workspace.actionPreferences.triggered.connect(self.actionOpen_Preferences)
         self._workspace.actionQuit.triggered.connect(self.actionQuit)
         # Edit
@@ -809,13 +810,14 @@ def actionOpen_Analysis(self):
         self.filesWidget.loadAnalysis()
 
 
-    def actionSave_Project(self):
+    def actionSave_Project(self) -> bool:
         """
         Menu Save Project
+        return: True if save was successful, False otherwise
         """
         filename = self.filesWidget.saveProject()
         if not filename:
-            return
+            return False
 
         # datasets
         all_data = self.filesWidget.getSerializedData()
@@ -840,6 +842,7 @@ def actionSave_Project(self):
 
         with open(filename, 'w') as outfile:
             GuiUtils.saveData(outfile, final_data)
+        return True
 
     def actionSave_Analysis(self):
         """
@@ -1319,6 +1322,24 @@ def actionAbout(self):
         about = About()
         about.exec()
 
+    def actionClose_Project(self):
+        """
+        Menu File/Close Project
+        """
+        # Make sure this is what the user really wants
+        reply = QMessageBox.question(self._parent, 'Close Project',
+                                    "Do you want to save the project before closing?\n"
+                                    "All unsaved changes will be lost if you don't save.",
+                                    QMessageBox.Save | QMessageBox.Discard | QMessageBox.Cancel,
+                                    QMessageBox.Cancel)
+        if reply == QMessageBox.Save:
+            saved = self.actionSave_Project()
+            if saved:
+                self.resetProject()
+        elif reply == QMessageBox.Discard:
+            self.resetProject()
+        # else Cancel, do nothing
+
     def actionCheck_for_update(self):
         """
         Menu Help/Check for Update
@@ -1396,3 +1417,15 @@ def saveCustomConfig(self):
         Save the config file based on current session values
         """
         config.save()
+
+    def resetProject(self):
+        """
+        Reset the project to an empty state
+        """
+        # perspectives
+        for per in self.loadedPerspectives.values():
+            if hasattr(per, 'reset'):
+                per.reset()
+        # file manager
+        self.filesWidget.reset()
+

src/sas/qtgui/MainWindow/UI/MainWindowUI.ui

@@ -24,7 +24,7 @@
      <x>0</x>
      <y>0</y>
      <width>915</width>
-     <height>20</height>
+     <height>26</height>
     </rect>
    </property>
    <widget class="QMenu" name="menu_File">
@@ -42,6 +42,8 @@
     <addaction name="separator"/>
     <addaction name="actionPreferences"/>
     <addaction name="separator"/>
+    <addaction name="actionClose_Project"/>
+    <addaction name="separator"/>
     <addaction name="actionQuit"/>
    </widget>
    <widget class="QMenu" name="menuEdit">
@@ -632,13 +634,18 @@
   <action name="actionMuMag_Fitter">
    <property name="text">
     <string>MuMag Fitter (Experimental)</string>
-      </property>
+   </property>
   </action>
   <action name="actionWhat_s_New">
    <property name="text">
     <string>What's New</string>
    </property>
   </action>
+  <action name="actionClose_Project">
+   <property name="text">
+    <string>Close Project</string>
+   </property>
+  </action>
  </widget>
  <resources/>
  <connections/>

src/sas/qtgui/Perspectives/Corfunc/CorfuncPerspective.py

@@ -989,3 +989,10 @@ def getReport(self) -> ReportData | None:
         report.add_plot(self.idf_figure)
 
         return report.report_data
+
+    def reset(self):
+        """
+        Reset the corfunc perspective to an empty state
+        """
+        self.removeData([self._model_item] if self._model_item else None)
+

src/sas/qtgui/Perspectives/Fitting/FittingPerspective.py

@@ -624,6 +624,15 @@ def getTabByName(self, name):
                 return tab
         return None
 
+    def reset(self):
+        """
+        Reset the fitting perspective to an empty state
+        """
+        while self.count() > 0:
+            self.closeTabByIndex(0)
+        # Add an empty fit tab
+        self.addFit(None)
+
     @property
     def supports_reports(self) -> bool:
         return True

src/sas/qtgui/Perspectives/Invariant/InvariantPerspective.py

@@ -1151,3 +1151,9 @@ def allowSwap(self):
         Tell the caller that we can't swap data
         """
         return False
+
+    def reset(self):
+        """
+        Reset the fitting perspective to an empty state
+        """
+        self.removeData([self._model_item] if self._model_item else None)

src/sas/qtgui/Perspectives/Inversion/InversionPerspective.py

@@ -126,7 +126,6 @@ def closeTabByIndex(self, index):
             # The tab might have already been deleted previously
             pass
 
-
     def closeTabByName(self, tab_name):
         """
         Given name of the tab - close it
@@ -435,3 +434,12 @@ def updateFromParameters(self, params):
         inversion_widget = self.currentWidget()
         if isinstance(inversion_widget, InversionWidget):
             inversion_widget.updateFromParameters(params)
+
+    def reset(self):
+        """
+        Reset the Inversion perspective to an empty state
+        """
+        self.tabs.clear()
+        self.clear()
+        self.maxIndex = 1
+        self.addData(None)

src/sas/qtgui/Perspectives/SizeDistribution/SizeDistributionPerspective.py

@@ -813,3 +813,10 @@ def clearStatistics(self):
         self.txtDiameterMean.setText("")
         self.txtDiameterMode.setText("")
         self.txtDiameterMedian.setText("")
+
+    def reset(self):
+        """
+        Reset the size distribution perspective to an empty state
+        """
+        self.removeData([self._model_item] if self._model_item else None)
+        self.resetWindow()