About tab and project tab now only opens once.

nw/gui/doctabs.py

@@ -58,30 +58,44 @@ class GuiDocTabs(QTabWidget):
     #  Internal Functions
     #
 
-    def _createTabAbout(self):
-        thisTab = GuiAboutView()
-        self.tabList.append(thisTab)
-        self.addTab(self.tabList[-1],"About")
-        return True
-
     def _createTabDoc(self, docName=None):
         if docName is None:
             tabName = "New Document"
         else:
             tabName = docName
         thisTab = GuiDocEditor()
-        self.tabList.append(thisTab)
-        self.addTab(self.tabList[-1],tabName)
+        self.addTab(thisTab,tabName)
+        self.setCurrentWidget(thisTab)
         return True
 
     def _createTabProject(self, projectName=None):
+        """Display or create the project settings page.
+        """
+        for i in range(self.count()):
+            thisTab = self.widget(i)
+            if isinstance(thisTab, GuiProjectEditor):
+                self.setCurrentWidget(thisTab)
+                return True
         if projectName is None:
             tabName = "New Project"
         else:
             tabName = projectName
         thisTab = GuiProjectEditor()
-        self.tabList.append(thisTab)
-        self.addTab(self.tabList[-1],tabName)
+        self.addTab(thisTab,tabName)
+        self.setCurrentWidget(thisTab)
+        return True
+
+    def _createTabAbout(self):
+        """Display or create the About tab.
+        """
+        for i in range(self.count()):
+            thisTab = self.widget(i)
+            if isinstance(thisTab, GuiAboutView):
+                self.setCurrentWidget(thisTab)
+                return True
+        thisTab = GuiAboutView()
+        self.addTab(thisTab,"About")
+        self.setCurrentWidget(thisTab)
         return True
 
     #
@@ -90,6 +104,8 @@ class GuiDocTabs(QTabWidget):
 
     def _doCloseTab(self, tabIdx):
         logger.verbose("User requested tab %d to be closed." % tabIdx)
+        self.removeTab(tabIdx)
+        logger.verbose("Tab %d closed." % tabIdx)
         return
 
 # END Class GuiDocTabs

nw/gui/winmain.py

@@ -159,6 +159,15 @@ class GuiMain(QMainWindow):
         menuExit.triggered.connect(self._menuExit)
         fileMenu.addAction(menuExit)
 
+        # Help
+        helpMenu = menuBar.addMenu("&Help")
+
+        # Help > About
+        menuAbout = QAction(QIcon.fromTheme("help-about"), "About", menuBar)
+        menuAbout.setStatusTip("About")
+        menuAbout.triggered.connect(self._showAbout)
+        helpMenu.addAction(menuAbout)
+
         return
 
     def _buildTreeToolBar(self):
@@ -189,4 +198,8 @@ class GuiMain(QMainWindow):
         qApp.quit()
         return True
 
+    def _showAbout(self):
+        self.docTabs.createTab(None,nw.DOCTYPE_ABOUT)
+        return True
+
 # END Class GuiMain